[alsa-devel] [PATCH v3 00/15] Move PMC clocks into Tegra PMC driver
Tegra PMC has clk_out_1, clk_out_2, clk_out_3 and blink controls which are currently registered by Tegra clock driver using clk_regiser_mux and clk_register_gate which performs direct Tegra PMC register access.
When Tegra PMC is in secure mode, any access from non-secure world will not go through.
This patch series adds these Tegra PMC clocks and blink controls to Tegra PMC driver with PMC as clock provider and removed them from Tegra clock driver. This also adds PMC specific clock id's to use in device tree and removed clock ids of PMC clock from Tegra clock driver.
clk_out_1 is dedicated for audio mclk and current ASoC driver does not setting extern1 as parent for clk_out_1 and enabling clk_out_1 and currently this is taken care by Tegra clock driver during clock inits and there is no need to enable this during clock init.
So, this series also includes patch that updates ASoC driver to take care of configuring parent of mclk and enabling mclk using both extern1 and clk_out_1 and updates all device trees to use clk_out_1 from pmc as mclk incase if device tree don't specify assigned-clock-parents.
This series also includes a patch for mclk fallback to use extern1 when retrieving mclk fails with new device tree which uses pmc provider to have this backward compatible of new DT with old kernels.
This series also includes a patch to remove clock ids for these clocks from clock dt-binding as these clocks are not used in any of the existing device tree except in tegra210-smaug.dts and this series includes a patch to update clock provider from tegra_car to pmc in tegra210-smaug.dts for clk_out_2.
[v3]: Changes between v2 and v3 are - Removes set parent of clk_out_1_mux to extern1 and enabling extern1 from the clock driver. - Doesn't enable clk_out_1 and blink by default in pmc driver - Updates ASoC driver to take care of audio mclk parent configuration incase if device tree don't specify assigned clock parent properties and enables mclk using both clk_out_1 and extern1. - updates all device trees using extern1 as mclk in sound node to use clk_out_1 from pmc. - patch for YAML format pmc dt-binding - Includes v2 feedback
[v2]: Changes between v1 and v2 are - v2 includes patches for adding clk_out_1, clk_out_2, clk_out_3, blink controls to Tegra PMC driver and removing clk-tegra-pmc. - feedback related to pmc clocks in Tegra PMC driver from v1 - Removed patches for WB0 PLLM overrides and PLLE IDDQ PMC programming by the clock driver using helper functions from Tegra PMC.
Note: To use helper functions from PMC driver, PMC early init need to happen prior to using helper functions and these helper functions are for PLLM Override and PLLE IDDQ programming in PMC during PLLM/PLLE clock registration which happen in clock_init prior to Tegra PMC probe. Moving PLLM/PLLE clocks registration to happen after Tegra PMC impacts other clocks EMC, MC and corresponding tegra_emc_init and tegra_mc_init. This implementation of configuring PMC registers thru helper functions in clock driver needs proper changes across PMC, Clock, EMC and MC inits to have it work across all Tegra platforms.
Currently PLLM Override is not enabled in the bootloader so proper patches for this fix will be taken care separately.
[v1]: v1 includes patches for below fixes. - adding clk_out_1, clk_out_2, clk_out_3, blink controls to Tegra PMC driver and removing clk-tegra-pmc. - updated clock provider from tegra_car to pmc in the device tree tegra210-smaug.dts that uses clk_out_2. - Added helper functions in PMC driver for WB0 PLLM overrides and PLLE IDDQ programming to use by clock driver and updated clock driver to use these helper functions and removed direct PMC access from clock driver and all pmc base address references in clock driver.
Sowjanya Komatineni (15): dt-bindings: soc: tegra-pmc: Add Tegra PMC clock bindings dt-bindings: tegra: Convert Tegra PMC bindings to YAML soc: tegra: Add Tegra PMC clock registrations into PMC driver dt-bindings: soc: tegra-pmc: Add id for Tegra PMC blink control soc: pmc: Add blink output clock registration to Tegra PMC clk: tegra: Remove tegra_pmc_clk_init along with clk ids dt-bindings: clock: tegra: Remove pmc clock ids from clock dt-bindings ASoC: tegra: Add audio mclk control through clk_out_1 and extern1 ASoC: tegra: Add fallback for audio mclk clk: tegra: Remove extern1 and cdev1 from clocks inittable ARM: dts: tegra: Add clock-cells property to pmc arm64: tegra: Add clock-cells property to Tegra PMC node ARM: tegra: Update sound node clocks in device tree arm64: tegra: smaug: Change clk_out_2 provider to pmc ASoC: nau8825: change Tegra clk_out_2 provider from tegra_car to pmc
.../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 45 ++- .../bindings/arm/tegra/nvidia,tegra20-pmc.yaml | 291 ++++++++++++++++++ .../devicetree/bindings/sound/nau8825.txt | 2 +- arch/arm/boot/dts/tegra114-dalmore.dts | 7 +- arch/arm/boot/dts/tegra114.dtsi | 4 +- arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi | 7 +- arch/arm/boot/dts/tegra124-apalis.dtsi | 7 +- arch/arm/boot/dts/tegra124-jetson-tk1.dts | 7 +- arch/arm/boot/dts/tegra124-nyan.dtsi | 7 +- arch/arm/boot/dts/tegra124-venice2.dts | 7 +- arch/arm/boot/dts/tegra124.dtsi | 4 +- arch/arm/boot/dts/tegra20.dtsi | 4 +- arch/arm/boot/dts/tegra30-apalis-v1.1.dtsi | 7 +- arch/arm/boot/dts/tegra30-apalis.dtsi | 7 +- arch/arm/boot/dts/tegra30-beaver.dts | 7 +- arch/arm/boot/dts/tegra30-cardhu.dtsi | 7 +- arch/arm/boot/dts/tegra30-colibri.dtsi | 7 +- arch/arm/boot/dts/tegra30.dtsi | 4 +- arch/arm64/boot/dts/nvidia/tegra132.dtsi | 4 +- arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 2 +- arch/arm64/boot/dts/nvidia/tegra210.dtsi | 2 + drivers/clk/tegra/Makefile | 1 - drivers/clk/tegra/clk-id.h | 7 - drivers/clk/tegra/clk-tegra-pmc.c | 122 -------- drivers/clk/tegra/clk-tegra114.c | 12 - drivers/clk/tegra/clk-tegra124.c | 28 +- drivers/clk/tegra/clk-tegra20.c | 5 - drivers/clk/tegra/clk-tegra210.c | 12 - drivers/clk/tegra/clk-tegra30.c | 13 - drivers/clk/tegra/clk.h | 1 - drivers/soc/tegra/pmc.c | 340 +++++++++++++++++++++ include/dt-bindings/clock/tegra114-car.h | 14 +- include/dt-bindings/clock/tegra124-car-common.h | 14 +- include/dt-bindings/clock/tegra20-car.h | 2 +- include/dt-bindings/clock/tegra210-car.h | 14 +- include/dt-bindings/clock/tegra30-car.h | 14 +- include/dt-bindings/soc/tegra-pmc.h | 19 ++ sound/soc/tegra/tegra_asoc_utils.c | 76 ++++- sound/soc/tegra/tegra_asoc_utils.h | 1 + 39 files changed, 890 insertions(+), 244 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml delete mode 100644 drivers/clk/tegra/clk-tegra-pmc.c create mode 100644 include/dt-bindings/soc/tegra-pmc.h
Tegra PMC has clk_out_1, clk_out_2, clk_out_3 clocks and each of these clocks has mux and a gate as a part of PMC controller.
This patch documents PMC clock bindings and adds a header defining Tegra PMC clock ids.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 45 +++++++++++++++++++++- include/dt-bindings/soc/tegra-pmc.h | 18 +++++++++ 2 files changed, 62 insertions(+), 1 deletion(-) create mode 100644 include/dt-bindings/soc/tegra-pmc.h
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt index cb12f33a247f..cd895423ccfd 100644 --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt @@ -21,6 +21,10 @@ Required properties: - clock-names : Must include the following entries: "pclk" (The Tegra clock of that name), "clk32k_in" (The 32KHz clock input to Tegra). +- #clock-cells : Should be 1 for Tegra30 and higher. + In clock consumers, this cell represents the PMC clock ID. + The assignments may be found in header file + <dt-bindings/soc/tegra-pmc.h>.
Optional properties: - nvidia,invert-interrupt : If present, inverts the PMU interrupt signal. @@ -80,11 +84,12 @@ Optional nodes: Example:
/ SoC dts including file -pmc@7000f400 { +pmc: pmc@7000f400 { compatible = "nvidia,tegra20-pmc"; reg = <0x7000e400 0x400>; clocks = <&tegra_car 110>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; nvidia,invert-interrupt; nvidia,suspend-mode = <1>; nvidia,cpu-pwr-good-time = <2000>; @@ -171,6 +176,7 @@ Example: reg = <0x0 0x7000e400 0x0 0x400>; clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>;
powergates { pd_audio: aud { @@ -260,6 +266,7 @@ Pad configuration state example: reg = <0x0 0x7000e400 0x0 0x400>; clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>;
...
@@ -298,3 +305,39 @@ Pinctrl client example: pinctrl-1 = <&hdmi_on>; pinctrl-names = "hdmi-on", "hdmi-off"; }; + +== Clock Control == + +Tegra PMC has 3 clocks clk_1, clk_2 and clk_3. Each of these clocks has +source selection and enable/disable gate. +Parent/source for these clocks can be either of clk_m, clk_m_div2, clk_m_div4, +or extern clock from Tegra CAR module. + +Clock configuration example: + pmc: pmc@7000e400 { + compatible = "nvidia,tegra210-pmc"; + reg = <0x0 0x7000e400 0x0 0x400>; + clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>; + clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; + }; + +Clock consumer example: + host1x@50000000 { + ... + vi@54080000 { + ... + assigned-clocks = <&pmc TEGRA_PMC_CLK_OUT_3_MUX>; + assigned-clock-parents = <&tegra_car TEGRA210_CLK_EXTERN3>; + }; + ... + }; + ... + i2c@7000c500 { + cam_sensor { + ... + clocks = <&pmc TEGRA_PMC_CLK_OUT_3>; + clock-names = "mclk"; + ... + }; + }; diff --git a/include/dt-bindings/soc/tegra-pmc.h b/include/dt-bindings/soc/tegra-pmc.h new file mode 100644 index 000000000000..705ee8083070 --- /dev/null +++ b/include/dt-bindings/soc/tegra-pmc.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved. + */ + +#ifndef _DT_BINDINGS_SOC_TEGRA_PMC_H +#define _DT_BINDINGS_SOC_TEGRA_PMC_H + +#define TEGRA_PMC_CLK_OUT_1_MUX 0 +#define TEGRA_PMC_CLK_OUT_1 1 +#define TEGRA_PMC_CLK_OUT_2_MUX 2 +#define TEGRA_PMC_CLK_OUT_2 3 +#define TEGRA_PMC_CLK_OUT_3_MUX 4 +#define TEGRA_PMC_CLK_OUT_3 5 + +#define TEGRA_PMC_CLK_MAX 6 + +#endif /* _DT_BINDINGS_SOC_TEGRA_PMC_H */
On Thu, Dec 05, 2019 at 06:48:41PM -0800, Sowjanya Komatineni wrote:
Tegra PMC has clk_out_1, clk_out_2, clk_out_3 clocks and each of these clocks has mux and a gate as a part of PMC controller.
[...]
--- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
[...]
+Clock consumer example:
- host1x@50000000 {
...
vi@54080000 {
...
assigned-clocks = <&pmc TEGRA_PMC_CLK_OUT_3_MUX>;
assigned-clock-parents = <&tegra_car TEGRA210_CLK_EXTERN3>;
};
...
- };
- ...
- i2c@7000c500 {
cam_sensor {
...
clocks = <&pmc TEGRA_PMC_CLK_OUT_3>;
clock-names = "mclk";
...
};
- };
The assigned-clocks should be in the cam_sensor node, unless vi device also uses the clock.
Best Regards, Michał Mirosław
This patch adds YAML schema for Tegra PMC bindings.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- .../bindings/arm/tegra/nvidia,tegra20-pmc.yaml | 291 +++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml new file mode 100644 index 000000000000..ab614f1be177 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml @@ -0,0 +1,291 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/tegra/nvidia,tegra20-pmc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Tegra Power Management Controller (PMC) + +maintainers: + - Thierry Reding thierry.reding@gmail.com + - Jonathan Hunter jonathanh@nvidia.com + +properties: + compatible: + oneOf: + - items: + - const: nvidia,tegra20-pmc + - const: nvidia,tegra20-pmc + - const: nvidia,tegra30-pmc + - const: nvidia,tegra114-pmc + - const: nvidia,tegra124-pmc + - const: nvidia,tegra210-pmc + + reg: + maxItems: 1 + + clock-names: + items: + - const: pclk, clk32k_in + description: + pclk is the Tegra clock of that name and clk32k_in is 32KHz clock + input to Tegra. + + clocks: + maxItems: 2 + + '#clock-cells': + const: 1 + description: + Tegra PMC has clk_out_1, clk_out_2, and clk_out_3. + Consumer of PMC clock should specify the desired clock by having + the clock ID in its "clocks" phandle cell with pmc clock provider. + See include/dt-bindings/soc/tegra-pmc.h for the list of Tegra PMC + clock IDs. + + nvidia,invert-interrupt: + $ref: /schemas/types.yaml#/definitions/flag + description: Inverts the PMU interrupt signal. + The PMU is an external Power Management Unit, whose interrupt output + signal is fed into the PMC. This signal is optionally inverted, and + then fed into the ARM GIC. The PMC is not involved in the detection + or handling of this interrupt signal, merely its inversion. + + nvidia,core-power-req-active-high: + $ref: /schemas/types.yaml#/definitions/flag + description: Core power request active-high. + + nvidia,sys-clock-req-active-high: + $ref: /schemas/types.yaml#/definitions/flag + description: System clock request active-high. + + nvidia,combined-power-req: + $ref: /schemas/types.yaml#/definitions/flag + description: combined power request for CPU and Core. + + nvidia,cpu-pwr-good-en: + $ref: /schemas/types.yaml#/definitions/flag + description: + CPU power good signal from external PMIC to PMC is enabled. + + nvidia,suspend-mode: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - enum: [0, 1, 2] + description: + The suspend mode that the platform should use. + Mode 0 is for LP0, CPU + Core voltage off and DRAM in self-refresh + Mode 1 is for LP1, CPU voltage off and DRAM in self-refresh + Mode 2 is for LP2, CPU voltage off + + nvidia,cpu-pwr-good-time: + $ref: /schemas/types.yaml#/definitions/uint32 + description: CPU power good time in uSec. + + nvidia,cpu-pwr-off-time: + $ref: /schemas/types.yaml#/definitions/uint32 + description: CPU power off time in uSec. + + nvidia,core-pwr-good-time: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + <Oscillator-stable-time Power-stable-time> + Core power good time in uSec. + + nvidia,core-pwr-off-time: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Core power off time in uSec. + + nvidia,lp0-vec: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + <start length> Starting address and length of LP0 vector. + The LP0 vector contains the warm boot code that is executed + by AVP when resuming from the LP0 state. + The AVP (Audio-Video Processor) is an ARM7 processor and + always being the first boot processor when chip is power on + or resume from deep sleep mode. When the system is resumed + from the deep sleep mode, the warm boot code will restore + some PLLs, clocks and then brings up CPU0 for resuming the + system. + + i2c-thermtrip: + type: object + description: + On Tegra30, Tegra114 and Tegra124 if i2c-thermtrip subnode exists, + hardware-triggered thermal reset will be enabled. + + properties: + nvidia,i2c-controller-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + ID of I2C controller to send poweroff command to PMU. + Valid values are described in section 9.2.148 + "APBDEV_PMC_SCRATCH53_0" of the Tegra K1 Technical Reference + Manual. + + nvidia,bus-addr: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Bus address of the PMU on the I2C bus. + + nvidia,reg-addr: + $ref: /schemas/types.yaml#/definitions/uint32 + description: PMU I2C register address to issue poweroff command. + + nvidia,reg-data: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Poweroff command to write to PMU. + + nvidia,pinmux-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Pinmux used by the hardware when issuing Poweroff command. + Defaults to 0. Valid values are described in section 12.5.2 + "Pinmux Support" of the Tegra4 Technical Reference Manual. + + required: + - nvidia,i2c-controller-id + - nvidia,bus-addr + - nvidia,reg-addr + - nvidia,reg-data + + powergates: + type: object + description: + This node contains a hierarchy of power domain nodes, which should + match the powergates on the Tegra SoC. Each powergate node + represents a power-domain on the Tegra SoC that can be power-gated + by the Tegra PMC. + Hardware blocks belonging to a power domain should contain + "power-domains" property that is a phandle pointing to corresponding + powergate node. + Please refer to Tegra TRM for mode details on the powergate nodes to + use for each power-gate block inside Tegra. + + patternProperties: + "^[a-z0-9]+$": + if: + type: object + then: + patternProperties: + clocks: + description: + Must contain an entry for each clock required by the PMC + for controlling a power-gate. + See ../clocks/clock-bindings.txt document for more details. + + resets: + description: + Must contain an entry for each reset required by the PMC + for controlling a power-gate. + See ../reset/reset.txt for more details. + + '#power-domain-cells': + description: Must be 0. + + required: + - clocks + - resets + - '#power-domain-cells' + +patternProperties: + "^.*@[0-9a-f]+$": + type: object + + properties: + pins: + $ref: /schemas/types.yaml#/definitions/string + description: Must contain name of the pad(s) to be configured. + + low-power-enable: + $ref: /schemas/types.yaml#/definitions/flag + description: Configure the pad into power down mode. + + low-power-disable: + $ref: /schemas/types.yaml#/definitions/flag + description: Configure the pad into active mode. + + power-source: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Must contain either TEGRA_IO_PAD_VOLTAGE_1V8 or + TEGRA_IO_PAD_VOLTAGE_3V3 to select between signaling voltages. + The values are defined in + include/dt-bindings/pinctrl/pinctrl-tegra-io-pad.h. + Power state can be configured on all Tegra124 and Tegra132 + pads. None of the Tegra124 or Tegra132 pads support signaling + voltage switching. + All of the listed Tegra210 pads except pex-cntrl support power + state configuration. Signaling voltage switching is supported + on below Tegra210 pads. + audio, audio-hv, cam, dbg, dmic, gpio, pex-cntrl, sdmmc1, + sdmmc3, spi, spi-hv, and uart. + + required: + - pins + +required: + - compatible + - reg + - clock-names + - clocks + - '#clock-cells' + +if: + properties: + nvidia,suspend-mode: + contains: + const: 2 + +then: + required: + - nvidia,cpu-pwr-good-time + - nvidia,cpu-pwr-off-time + - nvidia,core-pwr-good-time + - nvidia,core-pwr-off-time + +examples: + - | + #include <dt-bindings/soc/tegra-pmc.h> + + pmc: pmc@7000e400 { + compatible = "nvidia,tegra210-pmc"; + reg = <0x0 0x7000e400 0x0 0x400>; + clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>; + clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; + + powergates { + pd_audio: aud { + clocks = <&tegra_car TEGRA210_CLK_APE>, + <&tegra_car TEGRA210_CLK_APB2APE>; + resets = <&tegra_car 198>; + #power-domain-cells = <0>; + }; + + pd_xusbss: xusba { + clocks = <&tegra_car TEGRA210_CLK_XUSB_SS>; + resets = <&tegra_car TEGRA210_CLK_XUSB_SS>; + #power-domain-cells = <0>; + }; + }; + + sdmmc1_3v3: sdmmc1-3v3 { + pins = "sdmmc1"; + power-source = <TEGRA_IO_PAD_VOLTAGE_3V3>; + }; + + sdmmc1_1v8: sdmmc1-1v8 { + pins = "sdmmc1"; + power-source = <TEGRA_IO_PAD_VOLTAGE_1V8>; + }; + + nvidia,invert-interrupt; + nvidia,suspend-mode = <0>; + nvidia,cpu-pwr-good-time = <0>; + nvidia,cpu-pwr-off-time = <0>; + nvidia,core-pwr-good-time = <4587 3876>; + nvidia,core-pwr-off-time = <39065>; + nvidia,core-power-req-active-high; + nvidia,sys-clock-req-active-high; + };
Tegra210 and prior Tegra PMC has clk_out_1, clk_out_2, clk_out_3 with mux and gate for each of these clocks.
Currently these PMC clocks are registered by Tegra clock driver using clk_register_mux and clk_register_gate by passing PMC base address and register offsets and PMC programming for these clocks happens through direct PMC access by the clock driver.
With this, when PMC is in secure mode any direct PMC access from the non-secure world does not go through and these clocks will not be functional.
This patch adds these clocks registration with PMC as a clock provider for these clocks. clk_ops callback implementations for these clocks uses tegra_pmc_readl and tegra_pmc_writel which supports PMC programming in secure mode and non-secure mode.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- drivers/soc/tegra/pmc.c | 305 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 305 insertions(+)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index ea0e11a09c12..b8f6eb0ed8aa 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -13,6 +13,9 @@
#include <linux/arm-smccc.h> #include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/clk-conf.h> #include <linux/clk/tegra.h> #include <linux/debugfs.h> #include <linux/delay.h> @@ -48,6 +51,7 @@ #include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h> #include <dt-bindings/gpio/tegra186-gpio.h> #include <dt-bindings/gpio/tegra194-gpio.h> +#include <dt-bindings/soc/tegra-pmc.h>
#define PMC_CNTRL 0x0 #define PMC_CNTRL_INTR_POLARITY BIT(17) /* inverts INTR polarity */ @@ -100,6 +104,7 @@ #define PMC_WAKE2_STATUS 0x168 #define PMC_SW_WAKE2_STATUS 0x16c
+#define PMC_CLK_OUT_CNTRL 0x1a8 #define PMC_SENSOR_CTRL 0x1b0 #define PMC_SENSOR_CTRL_SCRATCH_WRITE BIT(2) #define PMC_SENSOR_CTRL_ENABLE_RST BIT(1) @@ -155,6 +160,83 @@ #define TEGRA_SMC_PMC_READ 0xaa #define TEGRA_SMC_PMC_WRITE 0xbb
+struct pmc_clk_mux { + struct clk_hw hw; + unsigned long offs; + u32 mask; + u32 shift; +}; + +#define to_pmc_clk_mux(_hw) container_of(_hw, struct pmc_clk_mux, hw) + +struct pmc_clk_gate { + struct clk_hw hw; + unsigned long offs; + u32 shift; +}; + +#define to_pmc_clk_gate(_hw) container_of(_hw, struct pmc_clk_gate, hw) + +struct pmc_clk_init_data { + char *mux_name; + char *gate_name; + const char **parents; + int num_parents; + int mux_id; + int gate_id; + char *dev_name; + u8 mux_shift; + u8 gate_shift; +}; + +static const char *clk_out1_parents[] = { "clk_m", "clk_m_div2", + "clk_m_div4", "extern1", +}; + +static const char *clk_out2_parents[] = { "clk_m", "clk_m_div2", + "clk_m_div4", "extern2", +}; + +static const char *clk_out3_parents[] = { "clk_m", "clk_m_div2", + "clk_m_div4", "extern3", +}; + +static const struct pmc_clk_init_data tegra_pmc_clks_data[] = { + { + .mux_name = "clk_out_1_mux", + .gate_name = "clk_out_1", + .parents = clk_out1_parents, + .num_parents = ARRAY_SIZE(clk_out1_parents), + .mux_id = TEGRA_PMC_CLK_OUT_1_MUX, + .gate_id = TEGRA_PMC_CLK_OUT_1, + .dev_name = "extern1", + .mux_shift = 6, + .gate_shift = 2, + }, + { + .mux_name = "clk_out_2_mux", + .gate_name = "clk_out_2", + .parents = clk_out2_parents, + .num_parents = ARRAY_SIZE(clk_out2_parents), + .mux_id = TEGRA_PMC_CLK_OUT_2_MUX, + .gate_id = TEGRA_PMC_CLK_OUT_2, + .dev_name = "extern2", + .mux_shift = 14, + .gate_shift = 10, + }, + { + .mux_name = "clk_out_3_mux", + .gate_name = "clk_out_3", + .parents = clk_out3_parents, + .num_parents = ARRAY_SIZE(clk_out3_parents), + .mux_id = TEGRA_PMC_CLK_OUT_3_MUX, + .gate_id = TEGRA_PMC_CLK_OUT_3, + .dev_name = "extern3", + .mux_shift = 22, + .gate_shift = 18, + }, +}; + struct tegra_powergate { struct generic_pm_domain genpd; struct tegra_pmc *pmc; @@ -254,6 +336,9 @@ struct tegra_pmc_soc { */ const struct tegra_wake_event *wake_events; unsigned int num_wake_events; + + const struct pmc_clk_init_data *pmc_clks_data; + unsigned int num_pmc_clks; };
static const char * const tegra186_reset_sources[] = { @@ -2163,6 +2248,211 @@ static int tegra_pmc_clk_notify_cb(struct notifier_block *nb, return NOTIFY_OK; }
+static void pmc_clk_fence_udelay(u32 offset) +{ + tegra_pmc_readl(pmc, offset); + /* pmc clk propagation delay 2 us */ + udelay(2); +} + +static u8 pmc_clk_mux_get_parent(struct clk_hw *hw) +{ + struct pmc_clk_mux *mux = to_pmc_clk_mux(hw); + int num_parents = clk_hw_get_num_parents(hw); + u32 val; + + val = tegra_pmc_readl(pmc, mux->offs) >> mux->shift; + val &= mux->mask; + + if (val >= num_parents) + return -EINVAL; + + return val; +} + +static int pmc_clk_mux_set_parent(struct clk_hw *hw, u8 index) +{ + struct pmc_clk_mux *mux = to_pmc_clk_mux(hw); + u32 val; + + val = tegra_pmc_readl(pmc, mux->offs); + val &= ~(mux->mask << mux->shift); + val |= index << mux->shift; + tegra_pmc_writel(pmc, val, mux->offs); + pmc_clk_fence_udelay(mux->offs); + + return 0; +} + +static const struct clk_ops pmc_clk_mux_ops = { + .get_parent = pmc_clk_mux_get_parent, + .set_parent = pmc_clk_mux_set_parent, + .determine_rate = __clk_mux_determine_rate, +}; + +static struct clk * +tegra_pmc_clk_mux_register(const char *name, const char * const *parent_names, + int num_parents, unsigned long flags, + unsigned long offset, u32 shift, u32 mask) +{ + struct clk_init_data init; + struct pmc_clk_mux *mux; + + mux = kzalloc(sizeof(*mux), GFP_KERNEL); + if (!mux) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &pmc_clk_mux_ops; + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = flags; + + mux->hw.init = &init; + mux->offs = offset; + mux->mask = mask; + mux->shift = shift; + + return clk_register(NULL, &mux->hw); +} + +static int pmc_clk_is_enabled(struct clk_hw *hw) +{ + struct pmc_clk_gate *gate = to_pmc_clk_gate(hw); + + return tegra_pmc_readl(pmc, gate->offs) & BIT(gate->shift) ? 1 : 0; +} + +static void pmc_clk_set_state(struct clk_hw *hw, int state) +{ + struct pmc_clk_gate *gate = to_pmc_clk_gate(hw); + u32 val; + + val = tegra_pmc_readl(pmc, gate->offs); + val = state ? (val | BIT(gate->shift)) : (val & ~BIT(gate->shift)); + tegra_pmc_writel(pmc, val, gate->offs); + pmc_clk_fence_udelay(gate->offs); +} + +static int pmc_clk_enable(struct clk_hw *hw) +{ + pmc_clk_set_state(hw, 1); + + return 0; +} + +static void pmc_clk_disable(struct clk_hw *hw) +{ + pmc_clk_set_state(hw, 0); +} + +static const struct clk_ops pmc_clk_gate_ops = { + .is_enabled = pmc_clk_is_enabled, + .enable = pmc_clk_enable, + .disable = pmc_clk_disable, +}; + +static struct clk * +tegra_pmc_clk_gate_register(const char *name, const char *parent_name, + unsigned long flags, unsigned long offset, + u32 shift) +{ + struct clk_init_data init; + struct pmc_clk_gate *gate; + + gate = kzalloc(sizeof(*gate), GFP_KERNEL); + if (!gate) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &pmc_clk_gate_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = flags; + + gate->hw.init = &init; + gate->offs = offset; + gate->shift = shift; + + return clk_register(NULL, &gate->hw); +} + +static void tegra_pmc_clock_register(struct tegra_pmc *pmc, + struct device_node *np) +{ + struct clk *clkmux, *clk; + struct clk_onecell_data *clk_data; + unsigned int num_clks; + int i, ret; + + /* each pmc clock output has a mux and a gate */ + num_clks = pmc->soc->num_pmc_clks * 2; + + if (!num_clks) + return; + + clk_data = kmalloc(sizeof(*clk_data), GFP_KERNEL); + if (!clk_data) + return; + + clk_data->clks = kcalloc(TEGRA_PMC_CLK_MAX, sizeof(*clk_data->clks), + GFP_KERNEL); + if (!clk_data->clks) + goto free_clkdata; + + clk_data->clk_num = TEGRA_PMC_CLK_MAX; + + for (i = 0; i < TEGRA_PMC_CLK_MAX; i++) + clk_data->clks[i] = ERR_PTR(-ENOENT); + + for (i = 0; i < pmc->soc->num_pmc_clks; i++) { + const struct pmc_clk_init_data *data; + + data = pmc->soc->pmc_clks_data + i; + + clkmux = tegra_pmc_clk_mux_register(data->mux_name, + data->parents, + data->num_parents, + CLK_SET_RATE_NO_REPARENT | + CLK_SET_RATE_PARENT, + PMC_CLK_OUT_CNTRL, + data->mux_shift, 3); + if (IS_ERR(clkmux)) + goto free_clks; + + clk_data->clks[data->mux_id] = clkmux; + + clk = tegra_pmc_clk_gate_register(data->gate_name, + data->mux_name, + CLK_SET_RATE_PARENT, + PMC_CLK_OUT_CNTRL, + data->gate_shift); + if (IS_ERR(clk)) + goto free_clks; + + clk_data->clks[data->gate_id] = clk; + + ret = clk_set_parent(clk, clkmux); + if (ret < 0) { + pr_err("failed to set parent of %s to %s: %d\n", + __clk_get_name(clk), + __clk_get_name(clkmux), ret); + } + + clk_register_clkdev(clk, data->dev_name, data->gate_name); + } + + of_clk_add_provider(np, of_clk_src_onecell_get, clk_data); + + return; + +free_clks: + kfree(clk_data->clks); +free_clkdata: + kfree(clk_data); + WARN(1, "failed to register Tegra PMC clocks\n"); +} + static int tegra_pmc_probe(struct platform_device *pdev) { void __iomem *base; @@ -2281,6 +2571,7 @@ static int tegra_pmc_probe(struct platform_device *pdev) pmc->base = base; mutex_unlock(&pmc->powergates_lock);
+ tegra_pmc_clock_register(pmc, pdev->dev.of_node); platform_set_drvdata(pdev, pmc);
return 0; @@ -2422,6 +2713,8 @@ static const struct tegra_pmc_soc tegra20_pmc_soc = { .num_reset_sources = 0, .reset_levels = NULL, .num_reset_levels = 0, + .pmc_clks_data = NULL, + .num_pmc_clks = 0, };
static const char * const tegra30_powergates[] = { @@ -2469,6 +2762,8 @@ static const struct tegra_pmc_soc tegra30_pmc_soc = { .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, + .pmc_clks_data = tegra_pmc_clks_data, + .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), };
static const char * const tegra114_powergates[] = { @@ -2520,6 +2815,8 @@ static const struct tegra_pmc_soc tegra114_pmc_soc = { .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, + .pmc_clks_data = tegra_pmc_clks_data, + .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), };
static const char * const tegra124_powergates[] = { @@ -2631,6 +2928,8 @@ static const struct tegra_pmc_soc tegra124_pmc_soc = { .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, + .pmc_clks_data = tegra_pmc_clks_data, + .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), };
static const char * const tegra210_powergates[] = { @@ -2745,6 +3044,8 @@ static const struct tegra_pmc_soc tegra210_pmc_soc = { .num_reset_levels = 0, .num_wake_events = ARRAY_SIZE(tegra210_wake_events), .wake_events = tegra210_wake_events, + .pmc_clks_data = tegra_pmc_clks_data, + .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), };
#define TEGRA186_IO_PAD_TABLE(_pad) \ @@ -2874,6 +3175,8 @@ static const struct tegra_pmc_soc tegra186_pmc_soc = { .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels), .num_wake_events = ARRAY_SIZE(tegra186_wake_events), .wake_events = tegra186_wake_events, + .pmc_clks_data = NULL, + .num_pmc_clks = 0, };
static const struct tegra_io_pad_soc tegra194_io_pads[] = { @@ -2991,6 +3294,8 @@ static const struct tegra_pmc_soc tegra194_pmc_soc = { .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels), .num_wake_events = ARRAY_SIZE(tegra194_wake_events), .wake_events = tegra194_wake_events, + .pmc_clks_data = NULL, + .num_pmc_clks = 0, };
static const struct of_device_id tegra_pmc_match[] = {
06.12.2019 05:48, Sowjanya Komatineni пишет:
Tegra210 and prior Tegra PMC has clk_out_1, clk_out_2, clk_out_3 with mux and gate for each of these clocks.
Currently these PMC clocks are registered by Tegra clock driver using clk_register_mux and clk_register_gate by passing PMC base address and register offsets and PMC programming for these clocks happens through direct PMC access by the clock driver.
With this, when PMC is in secure mode any direct PMC access from the non-secure world does not go through and these clocks will not be functional.
This patch adds these clocks registration with PMC as a clock provider for these clocks. clk_ops callback implementations for these clocks uses tegra_pmc_readl and tegra_pmc_writel which supports PMC programming in secure mode and non-secure mode.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
drivers/soc/tegra/pmc.c | 305 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 305 insertions(+)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index ea0e11a09c12..b8f6eb0ed8aa 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -13,6 +13,9 @@
#include <linux/arm-smccc.h> #include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/clk-conf.h> #include <linux/clk/tegra.h> #include <linux/debugfs.h> #include <linux/delay.h> @@ -48,6 +51,7 @@ #include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h> #include <dt-bindings/gpio/tegra186-gpio.h> #include <dt-bindings/gpio/tegra194-gpio.h> +#include <dt-bindings/soc/tegra-pmc.h>
#define PMC_CNTRL 0x0 #define PMC_CNTRL_INTR_POLARITY BIT(17) /* inverts INTR polarity */ @@ -100,6 +104,7 @@ #define PMC_WAKE2_STATUS 0x168 #define PMC_SW_WAKE2_STATUS 0x16c
+#define PMC_CLK_OUT_CNTRL 0x1a8 #define PMC_SENSOR_CTRL 0x1b0 #define PMC_SENSOR_CTRL_SCRATCH_WRITE BIT(2) #define PMC_SENSOR_CTRL_ENABLE_RST BIT(1) @@ -155,6 +160,83 @@ #define TEGRA_SMC_PMC_READ 0xaa #define TEGRA_SMC_PMC_WRITE 0xbb
+struct pmc_clk_mux {
- struct clk_hw hw;
- unsigned long offs;
- u32 mask;
- u32 shift;
+};
+#define to_pmc_clk_mux(_hw) container_of(_hw, struct pmc_clk_mux, hw)
+struct pmc_clk_gate {
- struct clk_hw hw;
- unsigned long offs;
- u32 shift;
+};
+#define to_pmc_clk_gate(_hw) container_of(_hw, struct pmc_clk_gate, hw)
+struct pmc_clk_init_data {
- char *mux_name;
- char *gate_name;
- const char **parents;
- int num_parents;
- int mux_id;
- int gate_id;
- char *dev_name;
- u8 mux_shift;
- u8 gate_shift;
+};
+static const char *clk_out1_parents[] = { "clk_m", "clk_m_div2",
- "clk_m_div4", "extern1",
+};
+static const char *clk_out2_parents[] = { "clk_m", "clk_m_div2",
- "clk_m_div4", "extern2",
+};
+static const char *clk_out3_parents[] = { "clk_m", "clk_m_div2",
- "clk_m_div4", "extern3",
+};
+static const struct pmc_clk_init_data tegra_pmc_clks_data[] = {
- {
.mux_name = "clk_out_1_mux",
.gate_name = "clk_out_1",
.parents = clk_out1_parents,
.num_parents = ARRAY_SIZE(clk_out1_parents),
.mux_id = TEGRA_PMC_CLK_OUT_1_MUX,
.gate_id = TEGRA_PMC_CLK_OUT_1,
.dev_name = "extern1",
.mux_shift = 6,
.gate_shift = 2,
- },
- {
.mux_name = "clk_out_2_mux",
.gate_name = "clk_out_2",
.parents = clk_out2_parents,
.num_parents = ARRAY_SIZE(clk_out2_parents),
.mux_id = TEGRA_PMC_CLK_OUT_2_MUX,
.gate_id = TEGRA_PMC_CLK_OUT_2,
.dev_name = "extern2",
.mux_shift = 14,
.gate_shift = 10,
- },
- {
.mux_name = "clk_out_3_mux",
.gate_name = "clk_out_3",
.parents = clk_out3_parents,
.num_parents = ARRAY_SIZE(clk_out3_parents),
.mux_id = TEGRA_PMC_CLK_OUT_3_MUX,
.gate_id = TEGRA_PMC_CLK_OUT_3,
.dev_name = "extern3",
.mux_shift = 22,
.gate_shift = 18,
- },
+};
struct tegra_powergate { struct generic_pm_domain genpd; struct tegra_pmc *pmc; @@ -254,6 +336,9 @@ struct tegra_pmc_soc { */ const struct tegra_wake_event *wake_events; unsigned int num_wake_events;
- const struct pmc_clk_init_data *pmc_clks_data;
- unsigned int num_pmc_clks;
};
static const char * const tegra186_reset_sources[] = { @@ -2163,6 +2248,211 @@ static int tegra_pmc_clk_notify_cb(struct notifier_block *nb, return NOTIFY_OK; }
+static void pmc_clk_fence_udelay(u32 offset) +{
- tegra_pmc_readl(pmc, offset);
- /* pmc clk propagation delay 2 us */
- udelay(2);
+}
+static u8 pmc_clk_mux_get_parent(struct clk_hw *hw) +{
- struct pmc_clk_mux *mux = to_pmc_clk_mux(hw);
- int num_parents = clk_hw_get_num_parents(hw);
- u32 val;
- val = tegra_pmc_readl(pmc, mux->offs) >> mux->shift;
- val &= mux->mask;
- if (val >= num_parents)
return -EINVAL;
How this could ever happen?
Why are you returning negative value for u8? It doesn't different from returning val >= num_parents.
- return val;
+}
+static int pmc_clk_mux_set_parent(struct clk_hw *hw, u8 index) +{
- struct pmc_clk_mux *mux = to_pmc_clk_mux(hw);
- u32 val;
- val = tegra_pmc_readl(pmc, mux->offs);
- val &= ~(mux->mask << mux->shift);
- val |= index << mux->shift;
- tegra_pmc_writel(pmc, val, mux->offs);
- pmc_clk_fence_udelay(mux->offs);
- return 0;
+}
+static const struct clk_ops pmc_clk_mux_ops = {
- .get_parent = pmc_clk_mux_get_parent,
- .set_parent = pmc_clk_mux_set_parent,
- .determine_rate = __clk_mux_determine_rate,
+};
+static struct clk * +tegra_pmc_clk_mux_register(const char *name, const char * const *parent_names,
int num_parents, unsigned long flags,
unsigned long offset, u32 shift, u32 mask)
+{
- struct clk_init_data init;
- struct pmc_clk_mux *mux;
- mux = kzalloc(sizeof(*mux), GFP_KERNEL);
- if (!mux)
return ERR_PTR(-ENOMEM);
- init.name = name;
- init.ops = &pmc_clk_mux_ops;
- init.parent_names = parent_names;
- init.num_parents = num_parents;
- init.flags = flags;
- mux->hw.init = &init;
- mux->offs = offset;
- mux->mask = mask;
- mux->shift = shift;
- return clk_register(NULL, &mux->hw);
+}
+static int pmc_clk_is_enabled(struct clk_hw *hw) +{
- struct pmc_clk_gate *gate = to_pmc_clk_gate(hw);
- return tegra_pmc_readl(pmc, gate->offs) & BIT(gate->shift) ? 1 : 0;
+}
+static void pmc_clk_set_state(struct clk_hw *hw, int state) +{
- struct pmc_clk_gate *gate = to_pmc_clk_gate(hw);
- u32 val;
- val = tegra_pmc_readl(pmc, gate->offs);
- val = state ? (val | BIT(gate->shift)) : (val & ~BIT(gate->shift));
- tegra_pmc_writel(pmc, val, gate->offs);
- pmc_clk_fence_udelay(gate->offs);
+}
+static int pmc_clk_enable(struct clk_hw *hw) +{
- pmc_clk_set_state(hw, 1);
- return 0;
+}
+static void pmc_clk_disable(struct clk_hw *hw) +{
- pmc_clk_set_state(hw, 0);
+}
+static const struct clk_ops pmc_clk_gate_ops = {
- .is_enabled = pmc_clk_is_enabled,
- .enable = pmc_clk_enable,
- .disable = pmc_clk_disable,
+};
What's the benefit of separating GATE from the MUX?
I think it could be a single clock.
+static struct clk * +tegra_pmc_clk_gate_register(const char *name, const char *parent_name,
unsigned long flags, unsigned long offset,
u32 shift)
+{
- struct clk_init_data init;
- struct pmc_clk_gate *gate;
- gate = kzalloc(sizeof(*gate), GFP_KERNEL);
- if (!gate)
return ERR_PTR(-ENOMEM);
- init.name = name;
- init.ops = &pmc_clk_gate_ops;
- init.parent_names = &parent_name;
- init.num_parents = 1;
- init.flags = flags;
- gate->hw.init = &init;
- gate->offs = offset;
- gate->shift = shift;
- return clk_register(NULL, &gate->hw);
+}
+static void tegra_pmc_clock_register(struct tegra_pmc *pmc,
struct device_node *np)
+{
- struct clk *clkmux, *clk;
- struct clk_onecell_data *clk_data;
- unsigned int num_clks;
- int i, ret;
- /* each pmc clock output has a mux and a gate */
- num_clks = pmc->soc->num_pmc_clks * 2;
- if (!num_clks)
return;
- clk_data = kmalloc(sizeof(*clk_data), GFP_KERNEL);
- if (!clk_data)
return;
- clk_data->clks = kcalloc(TEGRA_PMC_CLK_MAX, sizeof(*clk_data->clks),
GFP_KERNEL);
- if (!clk_data->clks)
goto free_clkdata;
- clk_data->clk_num = TEGRA_PMC_CLK_MAX;
- for (i = 0; i < TEGRA_PMC_CLK_MAX; i++)
clk_data->clks[i] = ERR_PTR(-ENOENT);
- for (i = 0; i < pmc->soc->num_pmc_clks; i++) {
const struct pmc_clk_init_data *data;
data = pmc->soc->pmc_clks_data + i;
clkmux = tegra_pmc_clk_mux_register(data->mux_name,
data->parents,
data->num_parents,
CLK_SET_RATE_NO_REPARENT |
CLK_SET_RATE_PARENT,
PMC_CLK_OUT_CNTRL,
data->mux_shift, 3);
if (IS_ERR(clkmux))
goto free_clks;
clk_data->clks[data->mux_id] = clkmux;
clk = tegra_pmc_clk_gate_register(data->gate_name,
data->mux_name,
CLK_SET_RATE_PARENT,
PMC_CLK_OUT_CNTRL,
data->gate_shift);
if (IS_ERR(clk))
goto free_clks;
clk_data->clks[data->gate_id] = clk;
ret = clk_set_parent(clk, clkmux);
if (ret < 0) {
pr_err("failed to set parent of %s to %s: %d\n",
__clk_get_name(clk),
__clk_get_name(clkmux), ret);
}
is this really needed? GATE clock has a single parent, the MUX.
07.12.2019 17:28, Dmitry Osipenko пишет:
06.12.2019 05:48, Sowjanya Komatineni пишет:
Tegra210 and prior Tegra PMC has clk_out_1, clk_out_2, clk_out_3 with mux and gate for each of these clocks.
Currently these PMC clocks are registered by Tegra clock driver using clk_register_mux and clk_register_gate by passing PMC base address and register offsets and PMC programming for these clocks happens through direct PMC access by the clock driver.
With this, when PMC is in secure mode any direct PMC access from the non-secure world does not go through and these clocks will not be functional.
This patch adds these clocks registration with PMC as a clock provider for these clocks. clk_ops callback implementations for these clocks uses tegra_pmc_readl and tegra_pmc_writel which supports PMC programming in secure mode and non-secure mode.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
[snip]
+static const struct clk_ops pmc_clk_gate_ops = {
- .is_enabled = pmc_clk_is_enabled,
- .enable = pmc_clk_enable,
- .disable = pmc_clk_disable,
+};
What's the benefit of separating GATE from the MUX?
I think it could be a single clock.
According to TRM:
1. GATE and MUX are separate entities.
2. GATE is the parent of MUX (see PMC's CLK_OUT paths diagram in TRM).
3. PMC doesn't gate EXTPERIPH clock but could "force-enable" it, correct?
[snip]
07.12.2019 18:47, Dmitry Osipenko пишет:
07.12.2019 17:28, Dmitry Osipenko пишет:
06.12.2019 05:48, Sowjanya Komatineni пишет:
Tegra210 and prior Tegra PMC has clk_out_1, clk_out_2, clk_out_3 with mux and gate for each of these clocks.
Currently these PMC clocks are registered by Tegra clock driver using clk_register_mux and clk_register_gate by passing PMC base address and register offsets and PMC programming for these clocks happens through direct PMC access by the clock driver.
With this, when PMC is in secure mode any direct PMC access from the non-secure world does not go through and these clocks will not be functional.
This patch adds these clocks registration with PMC as a clock provider for these clocks. clk_ops callback implementations for these clocks uses tegra_pmc_readl and tegra_pmc_writel which supports PMC programming in secure mode and non-secure mode.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
[snip]
+static const struct clk_ops pmc_clk_gate_ops = {
- .is_enabled = pmc_clk_is_enabled,
- .enable = pmc_clk_enable,
- .disable = pmc_clk_disable,
+};
What's the benefit of separating GATE from the MUX?
I think it could be a single clock.
According to TRM:
GATE and MUX are separate entities.
GATE is the parent of MUX (see PMC's CLK_OUT paths diagram in TRM).
PMC doesn't gate EXTPERIPH clock but could "force-enable" it, correct?
4. clk_m_div2/4 are internal PMC OSC dividers and thus these clocks should belong to PMC.
07.12.2019 18:53, Dmitry Osipenko пишет:
07.12.2019 18:47, Dmitry Osipenko пишет:
07.12.2019 17:28, Dmitry Osipenko пишет:
06.12.2019 05:48, Sowjanya Komatineni пишет:
Tegra210 and prior Tegra PMC has clk_out_1, clk_out_2, clk_out_3 with mux and gate for each of these clocks.
Currently these PMC clocks are registered by Tegra clock driver using clk_register_mux and clk_register_gate by passing PMC base address and register offsets and PMC programming for these clocks happens through direct PMC access by the clock driver.
With this, when PMC is in secure mode any direct PMC access from the non-secure world does not go through and these clocks will not be functional.
This patch adds these clocks registration with PMC as a clock provider for these clocks. clk_ops callback implementations for these clocks uses tegra_pmc_readl and tegra_pmc_writel which supports PMC programming in secure mode and non-secure mode.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
[snip]
+static const struct clk_ops pmc_clk_gate_ops = {
- .is_enabled = pmc_clk_is_enabled,
- .enable = pmc_clk_enable,
- .disable = pmc_clk_disable,
+};
What's the benefit of separating GATE from the MUX?
I think it could be a single clock.
According to TRM:
GATE and MUX are separate entities.
GATE is the parent of MUX (see PMC's CLK_OUT paths diagram in TRM).
PMC doesn't gate EXTPERIPH clock but could "force-enable" it, correct?
- clk_m_div2/4 are internal PMC OSC dividers and thus these clocks
should belong to PMC.
Also, it should be "osc" and not "clk_m".
Tegra PMC has a blinking control to output 32 KHz clock to blink pin.
This patch adds id for this blink control to use for enabling or disabling the blink output through devicetree.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- include/dt-bindings/soc/tegra-pmc.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/dt-bindings/soc/tegra-pmc.h b/include/dt-bindings/soc/tegra-pmc.h index 705ee8083070..6fe28516017e 100644 --- a/include/dt-bindings/soc/tegra-pmc.h +++ b/include/dt-bindings/soc/tegra-pmc.h @@ -12,7 +12,8 @@ #define TEGRA_PMC_CLK_OUT_2 3 #define TEGRA_PMC_CLK_OUT_3_MUX 4 #define TEGRA_PMC_CLK_OUT_3 5 +#define TEGRA_PMC_CLK_BLINK 6
-#define TEGRA_PMC_CLK_MAX 6 +#define TEGRA_PMC_CLK_MAX 7
#endif /* _DT_BINDINGS_SOC_TEGRA_PMC_H */
Tegra PMC has blink control to output 32 Khz clock out to Tegra blink pin. Blink pad DPD state and enable controls are part of Tegra PMC register space.
Currently Tegra clock driver registers blink control by passing PMC address and register offset to clk_register_gate which performs direct PMC access during clk_ops and with this when PMC is in secure mode, any access from non-secure world does not go through.
This patch adds blink control registration to the Tegra PMC driver using PMC specific clock gate operations that use tegra_pmc_readl and tegra_pmc_writel to support both secure mode and non-secure mode PMC register access.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- drivers/soc/tegra/pmc.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index b8f6eb0ed8aa..c62ab84cce9c 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -61,12 +61,15 @@ #define PMC_CNTRL_SYSCLK_OE BIT(11) /* system clock enable */ #define PMC_CNTRL_SYSCLK_POLARITY BIT(10) /* sys clk polarity */ #define PMC_CNTRL_PWRREQ_POLARITY BIT(8) +#define PMC_CNTRL_BLINK_EN 7 #define PMC_CNTRL_MAIN_RST BIT(4)
#define PMC_WAKE_MASK 0x0c #define PMC_WAKE_LEVEL 0x10 #define PMC_WAKE_STATUS 0x14 #define PMC_SW_WAKE_STATUS 0x18 +#define PMC_DPD_PADS_ORIDE 0x1c +#define PMC_DPD_PADS_ORIDE_BLINK 20
#define DPD_SAMPLE 0x020 #define DPD_SAMPLE_ENABLE BIT(0) @@ -79,6 +82,7 @@
#define PWRGATE_STATUS 0x38
+#define PMC_BLINK_TIMER 0x40 #define PMC_IMPL_E_33V_PWR 0x40
#define PMC_PWR_DET 0x48 @@ -339,6 +343,7 @@ struct tegra_pmc_soc {
const struct pmc_clk_init_data *pmc_clks_data; unsigned int num_pmc_clks; + bool has_blink_output; };
static const char * const tegra186_reset_sources[] = { @@ -2388,6 +2393,9 @@ static void tegra_pmc_clock_register(struct tegra_pmc *pmc, /* each pmc clock output has a mux and a gate */ num_clks = pmc->soc->num_pmc_clks * 2;
+ if (pmc->soc->has_blink_output) + num_clks += 1; + if (!num_clks) return;
@@ -2442,6 +2450,26 @@ static void tegra_pmc_clock_register(struct tegra_pmc *pmc, clk_register_clkdev(clk, data->dev_name, data->gate_name); }
+ if (pmc->soc->has_blink_output) { + tegra_pmc_writel(pmc, 0x0, PMC_BLINK_TIMER); + clk = tegra_pmc_clk_gate_register("blink_override", + "clk_32k", 0, + PMC_DPD_PADS_ORIDE, + PMC_DPD_PADS_ORIDE_BLINK); + if (IS_ERR(clk)) + goto free_clks; + + clk = tegra_pmc_clk_gate_register("blink", + "blink_override", 0, + PMC_CNTRL, + PMC_CNTRL_BLINK_EN); + if (IS_ERR(clk)) + goto free_clks; + + clk_data->clks[TEGRA_PMC_CLK_BLINK] = clk; + clk_register_clkdev(clk, "blink", NULL); + } + of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
return; @@ -2715,6 +2743,7 @@ static const struct tegra_pmc_soc tegra20_pmc_soc = { .num_reset_levels = 0, .pmc_clks_data = NULL, .num_pmc_clks = 0, + .has_blink_output = true, };
static const char * const tegra30_powergates[] = { @@ -2764,6 +2793,7 @@ static const struct tegra_pmc_soc tegra30_pmc_soc = { .num_reset_levels = 0, .pmc_clks_data = tegra_pmc_clks_data, .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), + .has_blink_output = true, };
static const char * const tegra114_powergates[] = { @@ -2817,6 +2847,7 @@ static const struct tegra_pmc_soc tegra114_pmc_soc = { .num_reset_levels = 0, .pmc_clks_data = tegra_pmc_clks_data, .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), + .has_blink_output = true, };
static const char * const tegra124_powergates[] = { @@ -2930,6 +2961,7 @@ static const struct tegra_pmc_soc tegra124_pmc_soc = { .num_reset_levels = 0, .pmc_clks_data = tegra_pmc_clks_data, .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), + .has_blink_output = true, };
static const char * const tegra210_powergates[] = { @@ -3046,6 +3078,7 @@ static const struct tegra_pmc_soc tegra210_pmc_soc = { .wake_events = tegra210_wake_events, .pmc_clks_data = tegra_pmc_clks_data, .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), + .has_blink_output = true, };
#define TEGRA186_IO_PAD_TABLE(_pad) \ @@ -3177,6 +3210,7 @@ static const struct tegra_pmc_soc tegra186_pmc_soc = { .wake_events = tegra186_wake_events, .pmc_clks_data = NULL, .num_pmc_clks = 0, + .has_blink_output = false, };
static const struct tegra_io_pad_soc tegra194_io_pads[] = { @@ -3296,6 +3330,7 @@ static const struct tegra_pmc_soc tegra194_pmc_soc = { .wake_events = tegra194_wake_events, .pmc_clks_data = NULL, .num_pmc_clks = 0, + .has_blink_output = false, };
static const struct of_device_id tegra_pmc_match[] = {
Current Tegra clock driver registers PMC clocks clk_out_1, clk_out_2, clk_out_3 and blink output in tegra_pmc_init() which does direct Tegra PMC access during clk_ops and these PMC register read and write access will not happen when PMC is in secure mode.
Any direct PMC register access from non-secure world will not go through and all the PMC clocks and blink control are done in Tegra PMC driver with PMC as clock provider.
This patch removes tegra_pmc_clk_init along with corresponding clk ids from Tegra clock driver.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- drivers/clk/tegra/Makefile | 1 - drivers/clk/tegra/clk-id.h | 7 --- drivers/clk/tegra/clk-tegra-pmc.c | 122 -------------------------------------- drivers/clk/tegra/clk-tegra114.c | 11 ---- drivers/clk/tegra/clk-tegra124.c | 27 +++------ drivers/clk/tegra/clk-tegra20.c | 4 -- drivers/clk/tegra/clk-tegra210.c | 11 ---- drivers/clk/tegra/clk-tegra30.c | 12 ---- drivers/clk/tegra/clk.h | 1 - 9 files changed, 7 insertions(+), 189 deletions(-) delete mode 100644 drivers/clk/tegra/clk-tegra-pmc.c
diff --git a/drivers/clk/tegra/Makefile b/drivers/clk/tegra/Makefile index df966ca06788..1f7c30f87ece 100644 --- a/drivers/clk/tegra/Makefile +++ b/drivers/clk/tegra/Makefile @@ -12,7 +12,6 @@ obj-y += clk-sdmmc-mux.o obj-y += clk-super.o obj-y += clk-tegra-audio.o obj-y += clk-tegra-periph.o -obj-y += clk-tegra-pmc.o obj-y += clk-tegra-fixed.o obj-y += clk-tegra-super-gen4.o obj-$(CONFIG_TEGRA_CLK_EMC) += clk-emc.o diff --git a/drivers/clk/tegra/clk-id.h b/drivers/clk/tegra/clk-id.h index c4faebd32760..5913357a8000 100644 --- a/drivers/clk/tegra/clk-id.h +++ b/drivers/clk/tegra/clk-id.h @@ -32,7 +32,6 @@ enum clk_id { tegra_clk_audio4, tegra_clk_audio4_2x, tegra_clk_audio4_mux, - tegra_clk_blink, tegra_clk_bsea, tegra_clk_bsev, tegra_clk_cclk_g, @@ -46,12 +45,6 @@ enum clk_id { tegra_clk_clk_m, tegra_clk_clk_m_div2, tegra_clk_clk_m_div4, - tegra_clk_clk_out_1, - tegra_clk_clk_out_1_mux, - tegra_clk_clk_out_2, - tegra_clk_clk_out_2_mux, - tegra_clk_clk_out_3, - tegra_clk_clk_out_3_mux, tegra_clk_cml0, tegra_clk_cml1, tegra_clk_csi, diff --git a/drivers/clk/tegra/clk-tegra-pmc.c b/drivers/clk/tegra/clk-tegra-pmc.c deleted file mode 100644 index bec3e008335f..000000000000 --- a/drivers/clk/tegra/clk-tegra-pmc.c +++ /dev/null @@ -1,122 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (c) 2012, 2013, NVIDIA CORPORATION. All rights reserved. - */ - -#include <linux/io.h> -#include <linux/clk-provider.h> -#include <linux/clkdev.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/delay.h> -#include <linux/export.h> -#include <linux/clk/tegra.h> - -#include "clk.h" -#include "clk-id.h" - -#define PMC_CLK_OUT_CNTRL 0x1a8 -#define PMC_DPD_PADS_ORIDE 0x1c -#define PMC_DPD_PADS_ORIDE_BLINK_ENB 20 -#define PMC_CTRL 0 -#define PMC_CTRL_BLINK_ENB 7 -#define PMC_BLINK_TIMER 0x40 - -struct pmc_clk_init_data { - char *mux_name; - char *gate_name; - const char **parents; - int num_parents; - int mux_id; - int gate_id; - char *dev_name; - u8 mux_shift; - u8 gate_shift; -}; - -#define PMC_CLK(_num, _mux_shift, _gate_shift)\ - {\ - .mux_name = "clk_out_" #_num "_mux",\ - .gate_name = "clk_out_" #_num,\ - .parents = clk_out ##_num ##_parents,\ - .num_parents = ARRAY_SIZE(clk_out ##_num ##_parents),\ - .mux_id = tegra_clk_clk_out_ ##_num ##_mux,\ - .gate_id = tegra_clk_clk_out_ ##_num,\ - .dev_name = "extern" #_num,\ - .mux_shift = _mux_shift,\ - .gate_shift = _gate_shift,\ - } - -static DEFINE_SPINLOCK(clk_out_lock); - -static const char *clk_out1_parents[] = { "clk_m", "clk_m_div2", - "clk_m_div4", "extern1", -}; - -static const char *clk_out2_parents[] = { "clk_m", "clk_m_div2", - "clk_m_div4", "extern2", -}; - -static const char *clk_out3_parents[] = { "clk_m", "clk_m_div2", - "clk_m_div4", "extern3", -}; - -static struct pmc_clk_init_data pmc_clks[] = { - PMC_CLK(1, 6, 2), - PMC_CLK(2, 14, 10), - PMC_CLK(3, 22, 18), -}; - -void __init tegra_pmc_clk_init(void __iomem *pmc_base, - struct tegra_clk *tegra_clks) -{ - struct clk *clk; - struct clk **dt_clk; - int i; - - for (i = 0; i < ARRAY_SIZE(pmc_clks); i++) { - struct pmc_clk_init_data *data; - - data = pmc_clks + i; - - dt_clk = tegra_lookup_dt_id(data->mux_id, tegra_clks); - if (!dt_clk) - continue; - - clk = clk_register_mux(NULL, data->mux_name, data->parents, - data->num_parents, - CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, - pmc_base + PMC_CLK_OUT_CNTRL, data->mux_shift, - 3, 0, &clk_out_lock); - *dt_clk = clk; - - - dt_clk = tegra_lookup_dt_id(data->gate_id, tegra_clks); - if (!dt_clk) - continue; - - clk = clk_register_gate(NULL, data->gate_name, data->mux_name, - CLK_SET_RATE_PARENT, - pmc_base + PMC_CLK_OUT_CNTRL, - data->gate_shift, 0, &clk_out_lock); - *dt_clk = clk; - clk_register_clkdev(clk, data->dev_name, data->gate_name); - } - - /* blink */ - writel_relaxed(0, pmc_base + PMC_BLINK_TIMER); - clk = clk_register_gate(NULL, "blink_override", "clk_32k", 0, - pmc_base + PMC_DPD_PADS_ORIDE, - PMC_DPD_PADS_ORIDE_BLINK_ENB, 0, NULL); - - dt_clk = tegra_lookup_dt_id(tegra_clk_blink, tegra_clks); - if (!dt_clk) - return; - - clk = clk_register_gate(NULL, "blink", "blink_override", 0, - pmc_base + PMC_CTRL, - PMC_CTRL_BLINK_ENB, 0, NULL); - clk_register_clkdev(clk, "blink", NULL); - *dt_clk = clk; -} - diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c index 4efcaaf51b3a..36ba1eb3dbe0 100644 --- a/drivers/clk/tegra/clk-tegra114.c +++ b/drivers/clk/tegra/clk-tegra114.c @@ -778,10 +778,6 @@ static struct tegra_clk tegra114_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3] = { .dt_id = TEGRA114_CLK_AUDIO3, .present = true }, [tegra_clk_audio4] = { .dt_id = TEGRA114_CLK_AUDIO4, .present = true }, [tegra_clk_spdif] = { .dt_id = TEGRA114_CLK_SPDIF, .present = true }, - [tegra_clk_clk_out_1] = { .dt_id = TEGRA114_CLK_CLK_OUT_1, .present = true }, - [tegra_clk_clk_out_2] = { .dt_id = TEGRA114_CLK_CLK_OUT_2, .present = true }, - [tegra_clk_clk_out_3] = { .dt_id = TEGRA114_CLK_CLK_OUT_3, .present = true }, - [tegra_clk_blink] = { .dt_id = TEGRA114_CLK_BLINK, .present = true }, [tegra_clk_xusb_host_src] = { .dt_id = TEGRA114_CLK_XUSB_HOST_SRC, .present = true }, [tegra_clk_xusb_falcon_src] = { .dt_id = TEGRA114_CLK_XUSB_FALCON_SRC, .present = true }, [tegra_clk_xusb_fs_src] = { .dt_id = TEGRA114_CLK_XUSB_FS_SRC, .present = true }, @@ -803,9 +799,6 @@ static struct tegra_clk tegra114_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3_mux] = { .dt_id = TEGRA114_CLK_AUDIO3_MUX, .present = true }, [tegra_clk_audio4_mux] = { .dt_id = TEGRA114_CLK_AUDIO4_MUX, .present = true }, [tegra_clk_spdif_mux] = { .dt_id = TEGRA114_CLK_SPDIF_MUX, .present = true }, - [tegra_clk_clk_out_1_mux] = { .dt_id = TEGRA114_CLK_CLK_OUT_1_MUX, .present = true }, - [tegra_clk_clk_out_2_mux] = { .dt_id = TEGRA114_CLK_CLK_OUT_2_MUX, .present = true }, - [tegra_clk_clk_out_3_mux] = { .dt_id = TEGRA114_CLK_CLK_OUT_3_MUX, .present = true }, [tegra_clk_dsia_mux] = { .dt_id = TEGRA114_CLK_DSIA_MUX, .present = true }, [tegra_clk_dsib_mux] = { .dt_id = TEGRA114_CLK_DSIB_MUX, .present = true }, [tegra_clk_cec] = { .dt_id = TEGRA114_CLK_CEC, .present = true }, @@ -866,7 +859,6 @@ static struct tegra_devclk devclks[] __initdata = { { .con_id = "extern1", .dev_id = "clk_out_1", .dt_id = TEGRA114_CLK_EXTERN1 }, { .con_id = "extern2", .dev_id = "clk_out_2", .dt_id = TEGRA114_CLK_EXTERN2 }, { .con_id = "extern3", .dev_id = "clk_out_3", .dt_id = TEGRA114_CLK_EXTERN3 }, - { .con_id = "blink", .dt_id = TEGRA114_CLK_BLINK }, { .con_id = "cclk_g", .dt_id = TEGRA114_CLK_CCLK_G }, { .con_id = "cclk_lp", .dt_id = TEGRA114_CLK_CCLK_LP }, { .con_id = "sclk", .dt_id = TEGRA114_CLK_SCLK }, @@ -1156,8 +1148,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA114_CLK_PLL_A, TEGRA114_CLK_CLK_MAX, 564480000, 1 }, { TEGRA114_CLK_PLL_A_OUT0, TEGRA114_CLK_CLK_MAX, 11289600, 1 }, { TEGRA114_CLK_EXTERN1, TEGRA114_CLK_PLL_A_OUT0, 0, 1 }, - { TEGRA114_CLK_CLK_OUT_1_MUX, TEGRA114_CLK_EXTERN1, 0, 1 }, - { TEGRA114_CLK_CLK_OUT_1, TEGRA114_CLK_CLK_MAX, 0, 1 }, { TEGRA114_CLK_I2S0, TEGRA114_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA114_CLK_I2S1, TEGRA114_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA114_CLK_I2S2, TEGRA114_CLK_PLL_A_OUT0, 11289600, 0 }, @@ -1359,7 +1349,6 @@ static void __init tegra114_clock_init(struct device_node *np) tegra_audio_clk_init(clk_base, pmc_base, tegra114_clks, tegra114_audio_plls, ARRAY_SIZE(tegra114_audio_plls), 24000000); - tegra_pmc_clk_init(pmc_base, tegra114_clks); tegra_super_clk_gen4_init(clk_base, pmc_base, tegra114_clks, &pll_x_params);
diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c index b3110d5b5a6c..24532d70e469 100644 --- a/drivers/clk/tegra/clk-tegra124.c +++ b/drivers/clk/tegra/clk-tegra124.c @@ -902,10 +902,6 @@ static struct tegra_clk tegra124_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3] = { .dt_id = TEGRA124_CLK_AUDIO3, .present = true }, [tegra_clk_audio4] = { .dt_id = TEGRA124_CLK_AUDIO4, .present = true }, [tegra_clk_spdif] = { .dt_id = TEGRA124_CLK_SPDIF, .present = true }, - [tegra_clk_clk_out_1] = { .dt_id = TEGRA124_CLK_CLK_OUT_1, .present = true }, - [tegra_clk_clk_out_2] = { .dt_id = TEGRA124_CLK_CLK_OUT_2, .present = true }, - [tegra_clk_clk_out_3] = { .dt_id = TEGRA124_CLK_CLK_OUT_3, .present = true }, - [tegra_clk_blink] = { .dt_id = TEGRA124_CLK_BLINK, .present = true }, [tegra_clk_xusb_host_src] = { .dt_id = TEGRA124_CLK_XUSB_HOST_SRC, .present = true }, [tegra_clk_xusb_falcon_src] = { .dt_id = TEGRA124_CLK_XUSB_FALCON_SRC, .present = true }, [tegra_clk_xusb_fs_src] = { .dt_id = TEGRA124_CLK_XUSB_FS_SRC, .present = true }, @@ -931,9 +927,6 @@ static struct tegra_clk tegra124_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3_mux] = { .dt_id = TEGRA124_CLK_AUDIO3_MUX, .present = true }, [tegra_clk_audio4_mux] = { .dt_id = TEGRA124_CLK_AUDIO4_MUX, .present = true }, [tegra_clk_spdif_mux] = { .dt_id = TEGRA124_CLK_SPDIF_MUX, .present = true }, - [tegra_clk_clk_out_1_mux] = { .dt_id = TEGRA124_CLK_CLK_OUT_1_MUX, .present = true }, - [tegra_clk_clk_out_2_mux] = { .dt_id = TEGRA124_CLK_CLK_OUT_2_MUX, .present = true }, - [tegra_clk_clk_out_3_mux] = { .dt_id = TEGRA124_CLK_CLK_OUT_3_MUX, .present = true }, [tegra_clk_cec] = { .dt_id = TEGRA124_CLK_CEC, .present = true }, };
@@ -991,7 +984,6 @@ static struct tegra_devclk devclks[] __initdata = { { .con_id = "extern1", .dev_id = "clk_out_1", .dt_id = TEGRA124_CLK_EXTERN1 }, { .con_id = "extern2", .dev_id = "clk_out_2", .dt_id = TEGRA124_CLK_EXTERN2 }, { .con_id = "extern3", .dev_id = "clk_out_3", .dt_id = TEGRA124_CLK_EXTERN3 }, - { .con_id = "blink", .dt_id = TEGRA124_CLK_BLINK }, { .con_id = "cclk_g", .dt_id = TEGRA124_CLK_CCLK_G }, { .con_id = "cclk_lp", .dt_id = TEGRA124_CLK_CCLK_LP }, { .con_id = "sclk", .dt_id = TEGRA124_CLK_SCLK }, @@ -1301,8 +1293,6 @@ static struct tegra_clk_init_table common_init_table[] __initdata = { { TEGRA124_CLK_PLL_A, TEGRA124_CLK_CLK_MAX, 564480000, 1 }, { TEGRA124_CLK_PLL_A_OUT0, TEGRA124_CLK_CLK_MAX, 11289600, 1 }, { TEGRA124_CLK_EXTERN1, TEGRA124_CLK_PLL_A_OUT0, 0, 1 }, - { TEGRA124_CLK_CLK_OUT_1_MUX, TEGRA124_CLK_EXTERN1, 0, 1 }, - { TEGRA124_CLK_CLK_OUT_1, TEGRA124_CLK_CLK_MAX, 0, 1 }, { TEGRA124_CLK_I2S0, TEGRA124_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA124_CLK_I2S1, TEGRA124_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA124_CLK_I2S2, TEGRA124_CLK_PLL_A_OUT0, 11289600, 0 }, @@ -1457,11 +1447,9 @@ static void __init tegra132_clock_apply_init_table(void) * tegra124_132_clock_init_pre - clock initialization preamble for T124/T132 * @np: struct device_node * of the DT node for the SoC CAR IP block * - * Register most of the clocks controlled by the CAR IP block, along - * with a few clocks controlled by the PMC IP block. Everything in - * this function should be common to Tegra124 and Tegra132. XXX The - * PMC clock initialization should probably be moved to PMC-specific - * driver code. No return value. + * Register most of the clocks controlled by the CAR IP block. + * Everything in this function should be common to Tegra124 and Tegra132. + * No return value. */ static void __init tegra124_132_clock_init_pre(struct device_node *np) { @@ -1504,7 +1492,6 @@ static void __init tegra124_132_clock_init_pre(struct device_node *np) tegra_audio_clk_init(clk_base, pmc_base, tegra124_clks, tegra124_audio_plls, ARRAY_SIZE(tegra124_audio_plls), 24576000); - tegra_pmc_clk_init(pmc_base, tegra124_clks);
/* For Tegra124 & Tegra132, PLLD is the only source for DSIA & DSIB */ plld_base = readl(clk_base + PLLD_BASE); @@ -1516,11 +1503,11 @@ static void __init tegra124_132_clock_init_pre(struct device_node *np) * tegra124_132_clock_init_post - clock initialization postamble for T124/T132 * @np: struct device_node * of the DT node for the SoC CAR IP block * - * Register most of the along with a few clocks controlled by the PMC - * IP block. Everything in this function should be common to Tegra124 + * Register most of the clocks controlled by the CAR IP block. + * Everything in this function should be common to Tegra124 * and Tegra132. This function must be called after - * tegra124_132_clock_init_pre(), otherwise clk_base and pmc_base will - * not be set. No return value. + * tegra124_132_clock_init_pre(), otherwise clk_base will not be set. + * No return value. */ static void __init tegra124_132_clock_init_post(struct device_node *np) { diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c index 4d8222f5c638..fe536f1d770d 100644 --- a/drivers/clk/tegra/clk-tegra20.c +++ b/drivers/clk/tegra/clk-tegra20.c @@ -458,7 +458,6 @@ static struct tegra_devclk devclks[] __initdata = { { .con_id = "cdev1", .dt_id = TEGRA20_CLK_CDEV1 }, { .con_id = "cdev2", .dt_id = TEGRA20_CLK_CDEV2 }, { .con_id = "clk_32k", .dt_id = TEGRA20_CLK_CLK_32K }, - { .con_id = "blink", .dt_id = TEGRA20_CLK_BLINK }, { .con_id = "clk_m", .dt_id = TEGRA20_CLK_CLK_M }, { .con_id = "pll_ref", .dt_id = TEGRA20_CLK_PLL_REF }, { .dev_id = "tegra20-i2s.0", .dt_id = TEGRA20_CLK_I2S1 }, @@ -537,7 +536,6 @@ static struct tegra_clk tegra20_clks[tegra_clk_max] __initdata = { [tegra_clk_csi] = { .dt_id = TEGRA20_CLK_CSI, .present = true }, [tegra_clk_isp] = { .dt_id = TEGRA20_CLK_ISP, .present = true }, [tegra_clk_clk_32k] = { .dt_id = TEGRA20_CLK_CLK_32K, .present = true }, - [tegra_clk_blink] = { .dt_id = TEGRA20_CLK_BLINK, .present = true }, [tegra_clk_hclk] = { .dt_id = TEGRA20_CLK_HCLK, .present = true }, [tegra_clk_pclk] = { .dt_id = TEGRA20_CLK_PCLK, .present = true }, [tegra_clk_pll_p_out1] = { .dt_id = TEGRA20_CLK_PLL_P_OUT1, .present = true }, @@ -1034,7 +1032,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA20_CLK_PLL_A, TEGRA20_CLK_CLK_MAX, 56448000, 1 }, { TEGRA20_CLK_PLL_A_OUT0, TEGRA20_CLK_CLK_MAX, 11289600, 1 }, { TEGRA20_CLK_CDEV1, TEGRA20_CLK_CLK_MAX, 0, 1 }, - { TEGRA20_CLK_BLINK, TEGRA20_CLK_CLK_MAX, 32768, 1 }, { TEGRA20_CLK_I2S1, TEGRA20_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA20_CLK_I2S2, TEGRA20_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA20_CLK_SDMMC1, TEGRA20_CLK_PLL_P, 48000000, 0 }, @@ -1148,7 +1145,6 @@ static void __init tegra20_clock_init(struct device_node *np) tegra_super_clk_gen4_init(clk_base, pmc_base, tegra20_clks, NULL); tegra20_periph_clk_init(); tegra20_audio_clk_init(); - tegra_pmc_clk_init(pmc_base, tegra20_clks);
tegra_init_dup_clks(tegra_clk_duplicates, clks, TEGRA20_CLK_CLK_MAX);
diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index 762cd186f714..af5119481d54 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -2417,10 +2417,6 @@ static struct tegra_clk tegra210_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3] = { .dt_id = TEGRA210_CLK_AUDIO3, .present = true }, [tegra_clk_audio4] = { .dt_id = TEGRA210_CLK_AUDIO4, .present = true }, [tegra_clk_spdif] = { .dt_id = TEGRA210_CLK_SPDIF, .present = true }, - [tegra_clk_clk_out_1] = { .dt_id = TEGRA210_CLK_CLK_OUT_1, .present = true }, - [tegra_clk_clk_out_2] = { .dt_id = TEGRA210_CLK_CLK_OUT_2, .present = true }, - [tegra_clk_clk_out_3] = { .dt_id = TEGRA210_CLK_CLK_OUT_3, .present = true }, - [tegra_clk_blink] = { .dt_id = TEGRA210_CLK_BLINK, .present = true }, [tegra_clk_xusb_gate] = { .dt_id = TEGRA210_CLK_XUSB_GATE, .present = true }, [tegra_clk_xusb_host_src_8] = { .dt_id = TEGRA210_CLK_XUSB_HOST_SRC, .present = true }, [tegra_clk_xusb_falcon_src_8] = { .dt_id = TEGRA210_CLK_XUSB_FALCON_SRC, .present = true }, @@ -2452,9 +2448,6 @@ static struct tegra_clk tegra210_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3_mux] = { .dt_id = TEGRA210_CLK_AUDIO3_MUX, .present = true }, [tegra_clk_audio4_mux] = { .dt_id = TEGRA210_CLK_AUDIO4_MUX, .present = true }, [tegra_clk_spdif_mux] = { .dt_id = TEGRA210_CLK_SPDIF_MUX, .present = true }, - [tegra_clk_clk_out_1_mux] = { .dt_id = TEGRA210_CLK_CLK_OUT_1_MUX, .present = true }, - [tegra_clk_clk_out_2_mux] = { .dt_id = TEGRA210_CLK_CLK_OUT_2_MUX, .present = true }, - [tegra_clk_clk_out_3_mux] = { .dt_id = TEGRA210_CLK_CLK_OUT_3_MUX, .present = true }, [tegra_clk_maud] = { .dt_id = TEGRA210_CLK_MAUD, .present = true }, [tegra_clk_mipibif] = { .dt_id = TEGRA210_CLK_MIPIBIF, .present = true }, [tegra_clk_qspi] = { .dt_id = TEGRA210_CLK_QSPI, .present = true }, @@ -2543,7 +2536,6 @@ static struct tegra_devclk devclks[] __initdata = { { .con_id = "extern1", .dev_id = "clk_out_1", .dt_id = TEGRA210_CLK_EXTERN1 }, { .con_id = "extern2", .dev_id = "clk_out_2", .dt_id = TEGRA210_CLK_EXTERN2 }, { .con_id = "extern3", .dev_id = "clk_out_3", .dt_id = TEGRA210_CLK_EXTERN3 }, - { .con_id = "blink", .dt_id = TEGRA210_CLK_BLINK }, { .con_id = "cclk_g", .dt_id = TEGRA210_CLK_CCLK_G }, { .con_id = "cclk_lp", .dt_id = TEGRA210_CLK_CCLK_LP }, { .con_id = "sclk", .dt_id = TEGRA210_CLK_SCLK }, @@ -3451,8 +3443,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA210_CLK_PLL_A, TEGRA210_CLK_CLK_MAX, 564480000, 1 }, { TEGRA210_CLK_PLL_A_OUT0, TEGRA210_CLK_CLK_MAX, 11289600, 1 }, { TEGRA210_CLK_EXTERN1, TEGRA210_CLK_PLL_A_OUT0, 0, 1 }, - { TEGRA210_CLK_CLK_OUT_1_MUX, TEGRA210_CLK_EXTERN1, 0, 1 }, - { TEGRA210_CLK_CLK_OUT_1, TEGRA210_CLK_CLK_MAX, 0, 1 }, { TEGRA210_CLK_I2S0, TEGRA210_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA210_CLK_I2S1, TEGRA210_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA210_CLK_I2S2, TEGRA210_CLK_PLL_A_OUT0, 11289600, 0 }, @@ -3693,7 +3683,6 @@ static void __init tegra210_clock_init(struct device_node *np) tegra_audio_clk_init(clk_base, pmc_base, tegra210_clks, tegra210_audio_plls, ARRAY_SIZE(tegra210_audio_plls), 24576000); - tegra_pmc_clk_init(pmc_base, tegra210_clks);
/* For Tegra210, PLLD is the only source for DSIA & DSIB */ value = readl(clk_base + PLLD_BASE); diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c index c8bc18e4d7e5..24599ed2e6ff 100644 --- a/drivers/clk/tegra/clk-tegra30.c +++ b/drivers/clk/tegra/clk-tegra30.c @@ -572,7 +572,6 @@ static struct tegra_devclk devclks[] __initdata = { { .con_id = "extern1", .dev_id = "clk_out_1", .dt_id = TEGRA30_CLK_EXTERN1 }, { .con_id = "extern2", .dev_id = "clk_out_2", .dt_id = TEGRA30_CLK_EXTERN2 }, { .con_id = "extern3", .dev_id = "clk_out_3", .dt_id = TEGRA30_CLK_EXTERN3 }, - { .con_id = "blink", .dt_id = TEGRA30_CLK_BLINK }, { .con_id = "cclk_g", .dt_id = TEGRA30_CLK_CCLK_G }, { .con_id = "cclk_lp", .dt_id = TEGRA30_CLK_CCLK_LP }, { .con_id = "sclk", .dt_id = TEGRA30_CLK_SCLK }, @@ -711,13 +710,6 @@ static struct tegra_clk tegra30_clks[tegra_clk_max] __initdata = { [tegra_clk_audio3_2x] = { .dt_id = TEGRA30_CLK_AUDIO3_2X, .present = true }, [tegra_clk_audio4_2x] = { .dt_id = TEGRA30_CLK_AUDIO4_2X, .present = true }, [tegra_clk_spdif_2x] = { .dt_id = TEGRA30_CLK_SPDIF_2X, .present = true }, - [tegra_clk_clk_out_1] = { .dt_id = TEGRA30_CLK_CLK_OUT_1, .present = true }, - [tegra_clk_clk_out_2] = { .dt_id = TEGRA30_CLK_CLK_OUT_2, .present = true }, - [tegra_clk_clk_out_3] = { .dt_id = TEGRA30_CLK_CLK_OUT_3, .present = true }, - [tegra_clk_blink] = { .dt_id = TEGRA30_CLK_BLINK, .present = true }, - [tegra_clk_clk_out_1_mux] = { .dt_id = TEGRA30_CLK_CLK_OUT_1_MUX, .present = true }, - [tegra_clk_clk_out_2_mux] = { .dt_id = TEGRA30_CLK_CLK_OUT_2_MUX, .present = true }, - [tegra_clk_clk_out_3_mux] = { .dt_id = TEGRA30_CLK_CLK_OUT_3_MUX, .present = true }, [tegra_clk_hclk] = { .dt_id = TEGRA30_CLK_HCLK, .present = true }, [tegra_clk_pclk] = { .dt_id = TEGRA30_CLK_PCLK, .present = true }, [tegra_clk_i2s0] = { .dt_id = TEGRA30_CLK_I2S0, .present = true }, @@ -1230,9 +1222,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA30_CLK_PLL_A, TEGRA30_CLK_CLK_MAX, 564480000, 1 }, { TEGRA30_CLK_PLL_A_OUT0, TEGRA30_CLK_CLK_MAX, 11289600, 1 }, { TEGRA30_CLK_EXTERN1, TEGRA30_CLK_PLL_A_OUT0, 0, 1 }, - { TEGRA30_CLK_CLK_OUT_1_MUX, TEGRA30_CLK_EXTERN1, 0, 0 }, - { TEGRA30_CLK_CLK_OUT_1, TEGRA30_CLK_CLK_MAX, 0, 1 }, - { TEGRA30_CLK_BLINK, TEGRA30_CLK_CLK_MAX, 0, 1 }, { TEGRA30_CLK_I2S0, TEGRA30_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA30_CLK_I2S1, TEGRA30_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA30_CLK_I2S2, TEGRA30_CLK_PLL_A_OUT0, 11289600, 0 }, @@ -1364,7 +1353,6 @@ static void __init tegra30_clock_init(struct device_node *np) tegra_audio_clk_init(clk_base, pmc_base, tegra30_clks, tegra30_audio_plls, ARRAY_SIZE(tegra30_audio_plls), 24000000); - tegra_pmc_clk_init(pmc_base, tegra30_clks);
tegra_init_dup_clks(tegra_clk_duplicates, clks, TEGRA30_CLK_CLK_MAX);
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index 416a6b09f6a3..2c9a68302e02 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -854,7 +854,6 @@ void tegra_periph_clk_init(void __iomem *clk_base, void __iomem *pmc_base, struct tegra_clk *tegra_clks, struct tegra_clk_pll_params *pll_params);
-void tegra_pmc_clk_init(void __iomem *pmc_base, struct tegra_clk *tegra_clks); void tegra_fixed_clk_init(struct tegra_clk *tegra_clks); int tegra_osc_clk_init(void __iomem *clk_base, struct tegra_clk *clks, unsigned long *input_freqs, unsigned int num,
06.12.2019 05:48, Sowjanya Komatineni пишет:
Current Tegra clock driver registers PMC clocks clk_out_1, clk_out_2, clk_out_3 and blink output in tegra_pmc_init() which does direct Tegra PMC access during clk_ops and these PMC register read and write access will not happen when PMC is in secure mode.
Any direct PMC register access from non-secure world will not go through and all the PMC clocks and blink control are done in Tegra PMC driver with PMC as clock provider.
This patch removes tegra_pmc_clk_init along with corresponding clk ids from Tegra clock driver.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
[snip]
@@ -1230,9 +1222,6 @@ static struct tegra_clk_init_table init_table[] __initdata = {
{ TEGRA30_CLK_PLL_A, TEGRA30_CLK_CLK_MAX, 564480000, 1 }, { TEGRA30_CLK_PLL_A_OUT0, TEGRA30_CLK_CLK_MAX, 11289600, 1 }, { TEGRA30_CLK_EXTERN1, TEGRA30_CLK_PLL_A_OUT0, 0, 1 },
Perhaps these clocks do not need to be always-enabled?
[snip]
07.12.2019 17:33, Dmitry Osipenko пишет:
06.12.2019 05:48, Sowjanya Komatineni пишет:
Current Tegra clock driver registers PMC clocks clk_out_1, clk_out_2, clk_out_3 and blink output in tegra_pmc_init() which does direct Tegra PMC access during clk_ops and these PMC register read and write access will not happen when PMC is in secure mode.
Any direct PMC register access from non-secure world will not go through and all the PMC clocks and blink control are done in Tegra PMC driver with PMC as clock provider.
This patch removes tegra_pmc_clk_init along with corresponding clk ids from Tegra clock driver.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
[snip]
@@ -1230,9 +1222,6 @@ static struct tegra_clk_init_table init_table[] __initdata = {
{ TEGRA30_CLK_PLL_A, TEGRA30_CLK_CLK_MAX, 564480000, 1 }, { TEGRA30_CLK_PLL_A_OUT0, TEGRA30_CLK_CLK_MAX, 11289600, 1 }, { TEGRA30_CLK_EXTERN1, TEGRA30_CLK_PLL_A_OUT0, 0, 1 },
Perhaps these clocks do not need to be always-enabled?
[snip]
Also, EXTERN1 parent configuration should be moved to the audio driver/device-tree as well.
Maybe it even makes sense to move the whole configuration, including PLLA. I don't see why clk driver need to do something for the audio driver.
07.12.2019 17:43, Dmitry Osipenko пишет:
07.12.2019 17:33, Dmitry Osipenko пишет:
06.12.2019 05:48, Sowjanya Komatineni пишет:
Current Tegra clock driver registers PMC clocks clk_out_1, clk_out_2, clk_out_3 and blink output in tegra_pmc_init() which does direct Tegra PMC access during clk_ops and these PMC register read and write access will not happen when PMC is in secure mode.
Any direct PMC register access from non-secure world will not go through and all the PMC clocks and blink control are done in Tegra PMC driver with PMC as clock provider.
This patch removes tegra_pmc_clk_init along with corresponding clk ids from Tegra clock driver.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
[snip]
@@ -1230,9 +1222,6 @@ static struct tegra_clk_init_table init_table[] __initdata = {
{ TEGRA30_CLK_PLL_A, TEGRA30_CLK_CLK_MAX, 564480000, 1 }, { TEGRA30_CLK_PLL_A_OUT0, TEGRA30_CLK_CLK_MAX, 11289600, 1 }, { TEGRA30_CLK_EXTERN1, TEGRA30_CLK_PLL_A_OUT0, 0, 1 },
Perhaps these clocks do not need to be always-enabled?
[snip]
Also, EXTERN1 parent configuration should be moved to the audio driver/device-tree as well.
Ah, I missed that it's done in the patch #10.
Maybe it even makes sense to move the whole configuration, including PLLA. I don't see why clk driver need to do something for the audio driver.
clk_out_1, clk_out_2, clk_out_3, blink are part of Tegra PMC block and these clocks are moved to Tegra PMC driver with pmc as clock provider and uses clock ids from dt-bindings/soc/tegra-pmc.h
So, this patch removes ids for these clocks from Tegra clock dt-bindings.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- include/dt-bindings/clock/tegra114-car.h | 14 +++++++------- include/dt-bindings/clock/tegra124-car-common.h | 14 +++++++------- include/dt-bindings/clock/tegra20-car.h | 2 +- include/dt-bindings/clock/tegra210-car.h | 14 +++++++------- include/dt-bindings/clock/tegra30-car.h | 14 +++++++------- 5 files changed, 29 insertions(+), 29 deletions(-)
diff --git a/include/dt-bindings/clock/tegra114-car.h b/include/dt-bindings/clock/tegra114-car.h index bb5c2c999c05..9175cd0571b5 100644 --- a/include/dt-bindings/clock/tegra114-car.h +++ b/include/dt-bindings/clock/tegra114-car.h @@ -270,10 +270,10 @@ #define TEGRA114_CLK_AUDIO3 242 #define TEGRA114_CLK_AUDIO4 243 #define TEGRA114_CLK_SPDIF 244 -#define TEGRA114_CLK_CLK_OUT_1 245 -#define TEGRA114_CLK_CLK_OUT_2 246 -#define TEGRA114_CLK_CLK_OUT_3 247 -#define TEGRA114_CLK_BLINK 248 +/* 245 */ +/* 246 */ +/* 247 */ +/* 248 */ /* 249 */ /* 250 */ /* 251 */ @@ -333,9 +333,9 @@ #define TEGRA114_CLK_AUDIO3_MUX 303 #define TEGRA114_CLK_AUDIO4_MUX 304 #define TEGRA114_CLK_SPDIF_MUX 305 -#define TEGRA114_CLK_CLK_OUT_1_MUX 306 -#define TEGRA114_CLK_CLK_OUT_2_MUX 307 -#define TEGRA114_CLK_CLK_OUT_3_MUX 308 +/* 306 */ +/* 307 */ +/* 308 */ #define TEGRA114_CLK_DSIA_MUX 309 #define TEGRA114_CLK_DSIB_MUX 310 #define TEGRA114_CLK_XUSB_SS_DIV2 311 diff --git a/include/dt-bindings/clock/tegra124-car-common.h b/include/dt-bindings/clock/tegra124-car-common.h index 0c4f5be0a742..90a0c5e7eb5f 100644 --- a/include/dt-bindings/clock/tegra124-car-common.h +++ b/include/dt-bindings/clock/tegra124-car-common.h @@ -269,10 +269,10 @@ #define TEGRA124_CLK_AUDIO3 242 #define TEGRA124_CLK_AUDIO4 243 #define TEGRA124_CLK_SPDIF 244 -#define TEGRA124_CLK_CLK_OUT_1 245 -#define TEGRA124_CLK_CLK_OUT_2 246 -#define TEGRA124_CLK_CLK_OUT_3 247 -#define TEGRA124_CLK_BLINK 248 +/* 245 */ +/* 246 */ +/* 247 */ +/* 248 */ /* 249 */ /* 250 */ /* 251 */ @@ -332,9 +332,9 @@ #define TEGRA124_CLK_AUDIO3_MUX 303 #define TEGRA124_CLK_AUDIO4_MUX 304 #define TEGRA124_CLK_SPDIF_MUX 305 -#define TEGRA124_CLK_CLK_OUT_1_MUX 306 -#define TEGRA124_CLK_CLK_OUT_2_MUX 307 -#define TEGRA124_CLK_CLK_OUT_3_MUX 308 +/* 306 */ +/* 307 */ +/* 308 */ /* 309 */ /* 310 */ #define TEGRA124_CLK_SOR0_LVDS 311 /* deprecated */ diff --git a/include/dt-bindings/clock/tegra20-car.h b/include/dt-bindings/clock/tegra20-car.h index b21a0eb32921..fe541f627965 100644 --- a/include/dt-bindings/clock/tegra20-car.h +++ b/include/dt-bindings/clock/tegra20-car.h @@ -131,7 +131,7 @@ #define TEGRA20_CLK_CCLK 108 #define TEGRA20_CLK_HCLK 109 #define TEGRA20_CLK_PCLK 110 -#define TEGRA20_CLK_BLINK 111 +/* 111 */ #define TEGRA20_CLK_PLL_A 112 #define TEGRA20_CLK_PLL_A_OUT0 113 #define TEGRA20_CLK_PLL_C 114 diff --git a/include/dt-bindings/clock/tegra210-car.h b/include/dt-bindings/clock/tegra210-car.h index 44f60623f99b..a3d8d3e75728 100644 --- a/include/dt-bindings/clock/tegra210-car.h +++ b/include/dt-bindings/clock/tegra210-car.h @@ -304,10 +304,10 @@ #define TEGRA210_CLK_AUDIO3 274 #define TEGRA210_CLK_AUDIO4 275 #define TEGRA210_CLK_SPDIF 276 -#define TEGRA210_CLK_CLK_OUT_1 277 -#define TEGRA210_CLK_CLK_OUT_2 278 -#define TEGRA210_CLK_CLK_OUT_3 279 -#define TEGRA210_CLK_BLINK 280 +/* 277 */ +/* 278 */ +/* 279 */ +/* 280 */ #define TEGRA210_CLK_SOR0_LVDS 281 /* deprecated */ #define TEGRA210_CLK_SOR0_OUT 281 #define TEGRA210_CLK_SOR1_OUT 282 @@ -386,9 +386,9 @@ #define TEGRA210_CLK_AUDIO3_MUX 353 #define TEGRA210_CLK_AUDIO4_MUX 354 #define TEGRA210_CLK_SPDIF_MUX 355 -#define TEGRA210_CLK_CLK_OUT_1_MUX 356 -#define TEGRA210_CLK_CLK_OUT_2_MUX 357 -#define TEGRA210_CLK_CLK_OUT_3_MUX 358 +/* 356 */ +/* 357 */ +/* 358 */ #define TEGRA210_CLK_DSIA_MUX 359 #define TEGRA210_CLK_DSIB_MUX 360 /* 361 */ diff --git a/include/dt-bindings/clock/tegra30-car.h b/include/dt-bindings/clock/tegra30-car.h index 3c90f1535551..20ef2462d9e1 100644 --- a/include/dt-bindings/clock/tegra30-car.h +++ b/include/dt-bindings/clock/tegra30-car.h @@ -230,11 +230,11 @@ #define TEGRA30_CLK_AUDIO3 204 #define TEGRA30_CLK_AUDIO4 205 #define TEGRA30_CLK_SPDIF 206 -#define TEGRA30_CLK_CLK_OUT_1 207 /* (extern1) */ -#define TEGRA30_CLK_CLK_OUT_2 208 /* (extern2) */ -#define TEGRA30_CLK_CLK_OUT_3 209 /* (extern3) */ +/* 207 */ +/* 208 */ +/* 209 */ #define TEGRA30_CLK_SCLK 210 -#define TEGRA30_CLK_BLINK 211 +/* 211 */ #define TEGRA30_CLK_CCLK_G 212 #define TEGRA30_CLK_CCLK_LP 213 #define TEGRA30_CLK_TWD 214 @@ -260,9 +260,9 @@ /* 297 */ /* 298 */ /* 299 */ -#define TEGRA30_CLK_CLK_OUT_1_MUX 300 -#define TEGRA30_CLK_CLK_OUT_2_MUX 301 -#define TEGRA30_CLK_CLK_OUT_3_MUX 302 +/* 300 */ +/* 301 */ +/* 302 */ #define TEGRA30_CLK_AUDIO0_MUX 303 #define TEGRA30_CLK_AUDIO1_MUX 304 #define TEGRA30_CLK_AUDIO2_MUX 305
Current ASoC driver uses extern1 as cdev1 clock from Tegra30 onwards through device tree.
Actual audio mclk is clk_out_1 and to use PLLA for mclk rate control, need to clk_out_1_mux parent to extern1 and extern1 parent to PLLA_OUT0.
Currently Tegra clock driver init sets the parents and enables both clk_out_1 and extern1 clocks. But these clocks parent and enables should be controlled by ASoC driver.
Clock parents can be specified in device tree using assigned-clocks and assigned-clock-parents.
To enable audio mclk, both clk_out_1 and extern1 clocks need to be enabled.
This patch configures parents for clk_out_1 and extern1 clocks if device tree does not specify clock parents inorder to support old device tree and controls mclk using both clk_out_1 and extern1 clocks.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- sound/soc/tegra/tegra_asoc_utils.c | 66 ++++++++++++++++++++++++++++++++++++++ sound/soc/tegra/tegra_asoc_utils.h | 1 + 2 files changed, 67 insertions(+)
diff --git a/sound/soc/tegra/tegra_asoc_utils.c b/sound/soc/tegra/tegra_asoc_utils.c index 536a578e9512..8e3a3740df7c 100644 --- a/sound/soc/tegra/tegra_asoc_utils.c +++ b/sound/soc/tegra/tegra_asoc_utils.c @@ -60,6 +60,7 @@ int tegra_asoc_utils_set_rate(struct tegra_asoc_utils_data *data, int srate, data->set_mclk = 0;
clk_disable_unprepare(data->clk_cdev1); + clk_disable_unprepare(data->clk_extern1); clk_disable_unprepare(data->clk_pll_a_out0); clk_disable_unprepare(data->clk_pll_a);
@@ -89,6 +90,14 @@ int tegra_asoc_utils_set_rate(struct tegra_asoc_utils_data *data, int srate, return err; }
+ if (!IS_ERR_OR_NULL(data->clk_extern1)) { + err = clk_prepare_enable(data->clk_extern1); + if (err) { + dev_err(data->dev, "Can't enable extern1: %d\n", err); + return err; + } + } + err = clk_prepare_enable(data->clk_cdev1); if (err) { dev_err(data->dev, "Can't enable cdev1: %d\n", err); @@ -109,6 +118,7 @@ int tegra_asoc_utils_set_ac97_rate(struct tegra_asoc_utils_data *data) int err;
clk_disable_unprepare(data->clk_cdev1); + clk_disable_unprepare(data->clk_extern1); clk_disable_unprepare(data->clk_pll_a_out0); clk_disable_unprepare(data->clk_pll_a);
@@ -142,6 +152,14 @@ int tegra_asoc_utils_set_ac97_rate(struct tegra_asoc_utils_data *data) return err; }
+ if (!IS_ERR_OR_NULL(data->clk_extern1)) { + err = clk_prepare_enable(data->clk_extern1); + if (err) { + dev_err(data->dev, "Can't enable extern1: %d\n", err); + return err; + } + } + err = clk_prepare_enable(data->clk_cdev1); if (err) { dev_err(data->dev, "Can't enable cdev1: %d\n", err); @@ -158,6 +176,7 @@ EXPORT_SYMBOL_GPL(tegra_asoc_utils_set_ac97_rate); int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, struct device *dev) { + struct clk *clk_out_1_mux; int ret;
data->dev = dev; @@ -196,6 +215,51 @@ int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, goto err_put_pll_a_out0; }
+ /* + * If clock parents are not set in DT, configure here to use clk_out_1 + * as mclk and extern1 as parent for Tegra30 and higher. + */ + if (!of_find_property(dev->of_node, "assigned-clock-parents", NULL) && + data->soc > TEGRA_ASOC_UTILS_SOC_TEGRA20) { + data->clk_extern1 = clk_get_sys("clk_out_1", "extern1"); + if (IS_ERR(data->clk_extern1)) { + dev_err(data->dev, "Can't retrieve clk extern1\n"); + ret = PTR_ERR(data->clk_extern1); + goto err_put_cdev1; + } + + ret = clk_set_parent(data->clk_extern1, data->clk_pll_a_out0); + if (ret < 0) { + dev_err(data->dev, + "Set parent failed for clk extern1: %d\n", + ret); + goto err_put_cdev1; + } + + clk_out_1_mux = clk_get_sys(NULL, "clk_out_1_mux"); + if (IS_ERR(clk_out_1_mux)) { + dev_err(data->dev, "Can't retrieve clk clk_out_1_mux\n"); + ret = PTR_ERR(clk_out_1_mux); + goto err_put_cdev1; + } + + ret = clk_set_parent(clk_out_1_mux, data->clk_extern1); + if (ret < 0) { + dev_err(data->dev, + "Set parent failed for clk_out_1_mux: %d\n", + ret); + clk_put(clk_out_1_mux); + goto err_put_cdev1; + } + + data->clk_cdev1 = clk_get_sys(NULL, "clk_out_1"); + if (IS_ERR(data->clk_cdev1)) { + dev_err(data->dev, "Can't retrieve clk clk_out_1\n"); + ret = PTR_ERR(data->clk_cdev1); + goto err_put_cdev1; + } + } + ret = tegra_asoc_utils_set_rate(data, 44100, 256 * 44100); if (ret) goto err_put_cdev1; @@ -215,6 +279,8 @@ EXPORT_SYMBOL_GPL(tegra_asoc_utils_init);
void tegra_asoc_utils_fini(struct tegra_asoc_utils_data *data) { + if (!IS_ERR_OR_NULL(data->clk_extern1)) + clk_put(data->clk_extern1); clk_put(data->clk_cdev1); clk_put(data->clk_pll_a_out0); clk_put(data->clk_pll_a); diff --git a/sound/soc/tegra/tegra_asoc_utils.h b/sound/soc/tegra/tegra_asoc_utils.h index 0c13818dee75..5f2b96478caf 100644 --- a/sound/soc/tegra/tegra_asoc_utils.h +++ b/sound/soc/tegra/tegra_asoc_utils.h @@ -25,6 +25,7 @@ struct tegra_asoc_utils_data { struct clk *clk_pll_a; struct clk *clk_pll_a_out0; struct clk *clk_cdev1; + struct clk *clk_extern1; int set_baseclock; int set_mclk; };
06.12.2019 05:48, Sowjanya Komatineni пишет:
Current ASoC driver uses extern1 as cdev1 clock from Tegra30 onwards through device tree.
Actual audio mclk is clk_out_1 and to use PLLA for mclk rate control, need to clk_out_1_mux parent to extern1 and extern1 parent to PLLA_OUT0.
Currently Tegra clock driver init sets the parents and enables both clk_out_1 and extern1 clocks. But these clocks parent and enables should be controlled by ASoC driver.
Clock parents can be specified in device tree using assigned-clocks and assigned-clock-parents.
To enable audio mclk, both clk_out_1 and extern1 clocks need to be enabled.
This patch configures parents for clk_out_1 and extern1 clocks if device tree does not specify clock parents inorder to support old device tree and controls mclk using both clk_out_1 and extern1 clocks.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
sound/soc/tegra/tegra_asoc_utils.c | 66 ++++++++++++++++++++++++++++++++++++++ sound/soc/tegra/tegra_asoc_utils.h | 1 + 2 files changed, 67 insertions(+)
diff --git a/sound/soc/tegra/tegra_asoc_utils.c b/sound/soc/tegra/tegra_asoc_utils.c index 536a578e9512..8e3a3740df7c 100644 --- a/sound/soc/tegra/tegra_asoc_utils.c +++ b/sound/soc/tegra/tegra_asoc_utils.c @@ -60,6 +60,7 @@ int tegra_asoc_utils_set_rate(struct tegra_asoc_utils_data *data, int srate, data->set_mclk = 0;
clk_disable_unprepare(data->clk_cdev1);
- clk_disable_unprepare(data->clk_extern1); clk_disable_unprepare(data->clk_pll_a_out0); clk_disable_unprepare(data->clk_pll_a);
@@ -89,6 +90,14 @@ int tegra_asoc_utils_set_rate(struct tegra_asoc_utils_data *data, int srate, return err; }
- if (!IS_ERR_OR_NULL(data->clk_extern1)) {
err = clk_prepare_enable(data->clk_extern1);
if (err) {
dev_err(data->dev, "Can't enable extern1: %d\n", err);
return err;
}
- }
- err = clk_prepare_enable(data->clk_cdev1); if (err) { dev_err(data->dev, "Can't enable cdev1: %d\n", err);
@@ -109,6 +118,7 @@ int tegra_asoc_utils_set_ac97_rate(struct tegra_asoc_utils_data *data) int err;
clk_disable_unprepare(data->clk_cdev1);
- clk_disable_unprepare(data->clk_extern1); clk_disable_unprepare(data->clk_pll_a_out0); clk_disable_unprepare(data->clk_pll_a);
@@ -142,6 +152,14 @@ int tegra_asoc_utils_set_ac97_rate(struct tegra_asoc_utils_data *data) return err; }
- if (!IS_ERR_OR_NULL(data->clk_extern1)) {
err = clk_prepare_enable(data->clk_extern1);
if (err) {
dev_err(data->dev, "Can't enable extern1: %d\n", err);
return err;
}
- }
Why this is needed given that clk_extern1 is either a child of MCLK or MCLK itself (on T20)? The child clocks are enabled when the parent is enabled.
err = clk_prepare_enable(data->clk_cdev1); if (err) { dev_err(data->dev, "Can't enable cdev1: %d\n", err); @@ -158,6 +176,7 @@ EXPORT_SYMBOL_GPL(tegra_asoc_utils_set_ac97_rate); int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, struct device *dev) {
struct clk *clk_out_1_mux; int ret;
data->dev = dev;
@@ -196,6 +215,51 @@ int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, goto err_put_pll_a_out0; }
In a previous patch you added fallback to EXTPERIPH when clk_get(MCLK) fails. This will work perfectly fine for the older kernels which have all clocks in the same single CaR driver, but this may not work that great for the newer kernels because PMC driver isn't registered early during boot and thus it is possible to get a legit -EPROBE_DEFER which shouldn't be ignored. In other words, you need to add into this patch a check for the error code returned by clk_get(MCLK) and fallback only for -EINVAL.
- /*
* If clock parents are not set in DT, configure here to use clk_out_1
* as mclk and extern1 as parent for Tegra30 and higher.
*/
- if (!of_find_property(dev->of_node, "assigned-clock-parents", NULL) &&
data->soc > TEGRA_ASOC_UTILS_SOC_TEGRA20) {
data->clk_extern1 = clk_get_sys("clk_out_1", "extern1");
if (IS_ERR(data->clk_extern1)) {
dev_err(data->dev, "Can't retrieve clk extern1\n");
ret = PTR_ERR(data->clk_extern1);
goto err_put_cdev1;
}
ret = clk_set_parent(data->clk_extern1, data->clk_pll_a_out0);
if (ret < 0) {
dev_err(data->dev,
"Set parent failed for clk extern1: %d\n",
ret);
goto err_put_cdev1;
}
clk_out_1_mux = clk_get_sys(NULL, "clk_out_1_mux");
Note1: clk_get(dev, "clk_out_1_mux") should work here by letting clk core to fall back to the clk_get_sys() by itself. Either way should be good.
Note2: devm_clk_get() could be used everywhere here. Maybe it won't hurt to convert tegra_asoc_utils to use managed resources to keep code a bit cleaner. It should be a separate patch.
if (IS_ERR(clk_out_1_mux)) {
dev_err(data->dev, "Can't retrieve clk clk_out_1_mux\n");
ret = PTR_ERR(clk_out_1_mux);
goto err_put_cdev1;
}
ret = clk_set_parent(clk_out_1_mux, data->clk_extern1);
if (ret < 0) {
dev_err(data->dev,
"Set parent failed for clk_out_1_mux: %d\n",
ret);
clk_put(clk_out_1_mux);
goto err_put_cdev1;
}
clk_put(clk_cdev1);
data->clk_cdev1 = clk_get_sys(NULL, "clk_out_1");
if (IS_ERR(data->clk_cdev1)) {
dev_err(data->dev, "Can't retrieve clk clk_out_1\n");
ret = PTR_ERR(data->clk_cdev1);
goto err_put_cdev1;
goto err_put_pll_a_out0;
}
- }
- ret = tegra_asoc_utils_set_rate(data, 44100, 256 * 44100); if (ret) goto err_put_cdev1;
@@ -215,6 +279,8 @@ EXPORT_SYMBOL_GPL(tegra_asoc_utils_init);
void tegra_asoc_utils_fini(struct tegra_asoc_utils_data *data) {
- if (!IS_ERR_OR_NULL(data->clk_extern1))
clk_put(data->clk_cdev1); clk_put(data->clk_pll_a_out0); clk_put(data->clk_pll_a);clk_put(data->clk_extern1);
diff --git a/sound/soc/tegra/tegra_asoc_utils.h b/sound/soc/tegra/tegra_asoc_utils.h index 0c13818dee75..5f2b96478caf 100644 --- a/sound/soc/tegra/tegra_asoc_utils.h +++ b/sound/soc/tegra/tegra_asoc_utils.h @@ -25,6 +25,7 @@ struct tegra_asoc_utils_data { struct clk *clk_pll_a; struct clk *clk_pll_a_out0; struct clk *clk_cdev1;
- struct clk *clk_extern1; int set_baseclock; int set_mclk;
};
mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks are moved to Tegra PMC driver with pmc as clock provider and using pmc clock ids.
New device tree uses clk_out_1 from pmc clock provider.
So, this patch adds fallback to extern1 in case of retrieving mclk fails to be backward compatible of new device tree with older kernels.
Cc: stable@vger.kernel.org
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- sound/soc/tegra/tegra_asoc_utils.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/sound/soc/tegra/tegra_asoc_utils.c b/sound/soc/tegra/tegra_asoc_utils.c index 8e3a3740df7c..f7408d5240c0 100644 --- a/sound/soc/tegra/tegra_asoc_utils.c +++ b/sound/soc/tegra/tegra_asoc_utils.c @@ -211,8 +211,14 @@ int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, data->clk_cdev1 = clk_get(dev, "mclk"); if (IS_ERR(data->clk_cdev1)) { dev_err(data->dev, "Can't retrieve clk cdev1\n"); - ret = PTR_ERR(data->clk_cdev1); - goto err_put_pll_a_out0; + data->clk_cdev1 = clk_get_sys("clk_out_1", "extern1"); + if (IS_ERR(data->clk_cdev1)) { + dev_err(data->dev, "Can't retrieve clk extern1\n"); + ret = PTR_ERR(data->clk_cdev1); + goto err_put_pll_a_out0; + } + + dev_err(data->dev, "Falling back to extern1\n"); }
/*
Thanks Greg.
Sorry, Will send this patch separately (out of this series) with stable tag to get this applied to stable kernels once review is done for this series.
On 12/5/19 6:48 PM, Sowjanya Komatineni wrote:
mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks are moved to Tegra PMC driver with pmc as clock provider and using pmc clock ids.
New device tree uses clk_out_1 from pmc clock provider.
So, this patch adds fallback to extern1 in case of retrieving mclk fails to be backward compatible of new device tree with older kernels.
Cc: stable@vger.kernel.org
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com
sound/soc/tegra/tegra_asoc_utils.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/sound/soc/tegra/tegra_asoc_utils.c b/sound/soc/tegra/tegra_asoc_utils.c index 8e3a3740df7c..f7408d5240c0 100644 --- a/sound/soc/tegra/tegra_asoc_utils.c +++ b/sound/soc/tegra/tegra_asoc_utils.c @@ -211,8 +211,14 @@ int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, data->clk_cdev1 = clk_get(dev, "mclk"); if (IS_ERR(data->clk_cdev1)) { dev_err(data->dev, "Can't retrieve clk cdev1\n");
ret = PTR_ERR(data->clk_cdev1);
goto err_put_pll_a_out0;
data->clk_cdev1 = clk_get_sys("clk_out_1", "extern1");
if (IS_ERR(data->clk_cdev1)) {
dev_err(data->dev, "Can't retrieve clk extern1\n");
ret = PTR_ERR(data->clk_cdev1);
goto err_put_pll_a_out0;
}
dev_err(data->dev, "Falling back to extern1\n");
}
/*
On Fri, Dec 06, 2019 at 09:49:49AM -0800, Sowjanya Komatineni wrote:
Thanks Greg.
Sorry, Will send this patch separately (out of this series) with stable tag to get this applied to stable kernels once review is done for this series.
Why not just properly add the tag in the original patch when it gets merged? That's how everyone else does it :)
This isn't new, it's been happening this way for 12+ years now...
thanks,
greg k-h
On Thu, Dec 05, 2019 at 06:48:49PM -0800, Sowjanya Komatineni wrote:
mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks are moved to Tegra PMC driver with pmc as clock provider and using pmc clock ids.
New device tree uses clk_out_1 from pmc clock provider.
So, this patch adds fallback to extern1 in case of retrieving mclk fails to be backward compatible of new device tree with older kernels.
Cc: stable@vger.kernel.org
Why would this need to be a stable fix? Presumably people with stable kernels are using the old device tree anyway?
09.12.2019 19:40, Mark Brown пишет:
On Thu, Dec 05, 2019 at 06:48:49PM -0800, Sowjanya Komatineni wrote:
mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks are moved to Tegra PMC driver with pmc as clock provider and using pmc clock ids.
New device tree uses clk_out_1 from pmc clock provider.
So, this patch adds fallback to extern1 in case of retrieving mclk fails to be backward compatible of new device tree with older kernels.
Cc: stable@vger.kernel.org
Why would this need to be a stable fix? Presumably people with stable kernels are using the old device tree anyway?
Presumably, yes.
At least Rob Herring is asking to maintain backwards compatibility because some ditros are using newer device-trees with stable kernels. I'm personally also tending to use the newer DTB with older kernel version whenever there is a need to check something using stable kernel. Perhaps losing sound is not very important, but will be nicer if that doesn't happen.
On Mon, Dec 09, 2019 at 11:31:59PM +0300, Dmitry Osipenko wrote:
09.12.2019 19:40, Mark Brown пишет:
Why would this need to be a stable fix? Presumably people with stable kernels are using the old device tree anyway?
At least Rob Herring is asking to maintain backwards compatibility because some ditros are using newer device-trees with stable kernels.
You're talking about forwards compatibility not backwards here. Are those distros actually using LTS kernels?
I'm personally also tending to use the newer DTB with older kernel version whenever there is a need to check something using stable kernel. Perhaps losing sound is not very important, but will be nicer if that doesn't happen.
That really does sound like a "you broke it, you get all the pieces" situation TBH... I'd be a lot more comfortable if the stable kernels were sticking to bugfix only though I do appreciate that they're not really that any more.
09.12.2019 23:47, Mark Brown пишет:
On Mon, Dec 09, 2019 at 11:31:59PM +0300, Dmitry Osipenko wrote:
09.12.2019 19:40, Mark Brown пишет:
Why would this need to be a stable fix? Presumably people with stable kernels are using the old device tree anyway?
At least Rob Herring is asking to maintain backwards compatibility because some ditros are using newer device-trees with stable kernels.
You're talking about forwards compatibility not backwards here. Are those distros actually using LTS kernels?
I think openSUSE Leap could be one of those distros that use LTS kernel with newer device-trees, but that's not 100%. Maybe Rob could help clarifying that.
I'm personally also tending to use the newer DTB with older kernel version whenever there is a need to check something using stable kernel. Perhaps losing sound is not very important, but will be nicer if that doesn't happen.
That really does sound like a "you broke it, you get all the pieces" situation TBH... I'd be a lot more comfortable if the stable kernels were sticking to bugfix only though I do appreciate that they're not really that any more.
In some cases it could be painful to maintain device-tree compatibility for platforms like NVIDIA Tegra SoCs because hardware wasn't modeled correctly from the start.
I agree that people should use relevant device-trees. It's quite a lot of hassle to care about compatibility for platforms that are permanently in a development state. It could be more reasonable to go through the pain if kernel required a full-featured device tree for every SoC from the start.
But maybe Tegra / device-tree maintainers have a different opinion. IIUC, device-trees are meant to be stable and software-agnostic, at least that was the case not so long time ago and I don't think that this premise changed.
On Tue, Dec 10, 2019 at 09:24:43PM +0300, Dmitry Osipenko wrote:
In some cases it could be painful to maintain device-tree compatibility for platforms like NVIDIA Tegra SoCs because hardware wasn't modeled correctly from the start.
I agree that people should use relevant device-trees. It's quite a lot of hassle to care about compatibility for platforms that are permanently in a development state. It could be more reasonable to go through the pain if kernel required a full-featured device tree for every SoC from the start.
We absolutely should support the newer kernel with older device tree case, what's less clear to me is the new device tree with old kernel which is applying LTS updates case. That does seem incredibly specialist - I'd honestly never heard of people doing that before this thread.
10.12.2019 21:59, Mark Brown пишет:
On Tue, Dec 10, 2019 at 09:24:43PM +0300, Dmitry Osipenko wrote:
In some cases it could be painful to maintain device-tree compatibility for platforms like NVIDIA Tegra SoCs because hardware wasn't modeled correctly from the start.
I agree that people should use relevant device-trees. It's quite a lot of hassle to care about compatibility for platforms that are permanently in a development state. It could be more reasonable to go through the pain if kernel required a full-featured device tree for every SoC from the start.
We absolutely should support the newer kernel with older device tree case, what's less clear to me is the new device tree with old kernel which is applying LTS updates case. That does seem incredibly specialist - I'd honestly never heard of people doing that before this thread.
There was a precedent in the past [1].
Current clock driver enables cdev1 on Tegra20 and extern1 on Tegra30 and above as a part of clocks init and there is no need to have this clock enabled during the boot.
extern1 is used as parent for clk_out_1 and clk_out_1 is dedicated for audio mclk on Tegra30 and above Tegra platforms and these clocks are taken care by ASoC driver.
So, this patch removes parenting and enabling extern1 from clock init of Tegra30 and above and removes enabling cdev1 from Tegra20 clock init.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- drivers/clk/tegra/clk-tegra114.c | 1 - drivers/clk/tegra/clk-tegra124.c | 1 - drivers/clk/tegra/clk-tegra20.c | 1 - drivers/clk/tegra/clk-tegra210.c | 1 - drivers/clk/tegra/clk-tegra30.c | 1 - 5 files changed, 5 deletions(-)
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c index 36ba1eb3dbe0..3c29896b19a7 100644 --- a/drivers/clk/tegra/clk-tegra114.c +++ b/drivers/clk/tegra/clk-tegra114.c @@ -1147,7 +1147,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA114_CLK_UARTD, TEGRA114_CLK_PLL_P, 408000000, 0 }, { TEGRA114_CLK_PLL_A, TEGRA114_CLK_CLK_MAX, 564480000, 1 }, { TEGRA114_CLK_PLL_A_OUT0, TEGRA114_CLK_CLK_MAX, 11289600, 1 }, - { TEGRA114_CLK_EXTERN1, TEGRA114_CLK_PLL_A_OUT0, 0, 1 }, { TEGRA114_CLK_I2S0, TEGRA114_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA114_CLK_I2S1, TEGRA114_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA114_CLK_I2S2, TEGRA114_CLK_PLL_A_OUT0, 11289600, 0 }, diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c index 24532d70e469..6861ded135e0 100644 --- a/drivers/clk/tegra/clk-tegra124.c +++ b/drivers/clk/tegra/clk-tegra124.c @@ -1292,7 +1292,6 @@ static struct tegra_clk_init_table common_init_table[] __initdata = { { TEGRA124_CLK_UARTD, TEGRA124_CLK_PLL_P, 408000000, 0 }, { TEGRA124_CLK_PLL_A, TEGRA124_CLK_CLK_MAX, 564480000, 1 }, { TEGRA124_CLK_PLL_A_OUT0, TEGRA124_CLK_CLK_MAX, 11289600, 1 }, - { TEGRA124_CLK_EXTERN1, TEGRA124_CLK_PLL_A_OUT0, 0, 1 }, { TEGRA124_CLK_I2S0, TEGRA124_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA124_CLK_I2S1, TEGRA124_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA124_CLK_I2S2, TEGRA124_CLK_PLL_A_OUT0, 11289600, 0 }, diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c index fe536f1d770d..a552dafb8174 100644 --- a/drivers/clk/tegra/clk-tegra20.c +++ b/drivers/clk/tegra/clk-tegra20.c @@ -1031,7 +1031,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA20_CLK_UARTE, TEGRA20_CLK_PLL_P, 0, 0 }, { TEGRA20_CLK_PLL_A, TEGRA20_CLK_CLK_MAX, 56448000, 1 }, { TEGRA20_CLK_PLL_A_OUT0, TEGRA20_CLK_CLK_MAX, 11289600, 1 }, - { TEGRA20_CLK_CDEV1, TEGRA20_CLK_CLK_MAX, 0, 1 }, { TEGRA20_CLK_I2S1, TEGRA20_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA20_CLK_I2S2, TEGRA20_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA20_CLK_SDMMC1, TEGRA20_CLK_PLL_P, 48000000, 0 }, diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index af5119481d54..252859faeb4a 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -3442,7 +3442,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA210_CLK_UARTD, TEGRA210_CLK_PLL_P, 408000000, 0 }, { TEGRA210_CLK_PLL_A, TEGRA210_CLK_CLK_MAX, 564480000, 1 }, { TEGRA210_CLK_PLL_A_OUT0, TEGRA210_CLK_CLK_MAX, 11289600, 1 }, - { TEGRA210_CLK_EXTERN1, TEGRA210_CLK_PLL_A_OUT0, 0, 1 }, { TEGRA210_CLK_I2S0, TEGRA210_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA210_CLK_I2S1, TEGRA210_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA210_CLK_I2S2, TEGRA210_CLK_PLL_A_OUT0, 11289600, 0 }, diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c index 24599ed2e6ff..65fdead2c764 100644 --- a/drivers/clk/tegra/clk-tegra30.c +++ b/drivers/clk/tegra/clk-tegra30.c @@ -1221,7 +1221,6 @@ static struct tegra_clk_init_table init_table[] __initdata = { { TEGRA30_CLK_UARTE, TEGRA30_CLK_PLL_P, 408000000, 0 }, { TEGRA30_CLK_PLL_A, TEGRA30_CLK_CLK_MAX, 564480000, 1 }, { TEGRA30_CLK_PLL_A_OUT0, TEGRA30_CLK_CLK_MAX, 11289600, 1 }, - { TEGRA30_CLK_EXTERN1, TEGRA30_CLK_PLL_A_OUT0, 0, 1 }, { TEGRA30_CLK_I2S0, TEGRA30_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA30_CLK_I2S1, TEGRA30_CLK_PLL_A_OUT0, 11289600, 0 }, { TEGRA30_CLK_I2S2, TEGRA30_CLK_PLL_A_OUT0, 11289600, 0 },
Tegra PMC has clk_out_1, clk_out_2, clk_out_3 with mux and gate for each of these clocks and 32 kHz blink.
These clocks are moved from clock driver to pmc driver with pmc as the clock provider for these clocks.
This patch adds #clock-cells property with 1 clock specifier to the Tegra PMC node in device tree.
Signed-off-by: Sowjanya Komatineni skomatineni@nvidia.com --- arch/arm/boot/dts/tegra114.dtsi | 4 +++- arch/arm/boot/dts/tegra124.dtsi | 4 +++- arch/arm/boot/dts/tegra20.dtsi | 4 +++- arch/arm/boot/dts/tegra30.dtsi | 4 +++- 4 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi index 0d7a6327e404..b8f12f24f314 100644 --- a/arch/arm/boot/dts/tegra114.dtsi +++ b/arch/arm/boot/dts/tegra114.dtsi @@ -4,6 +4,7 @@ #include <dt-bindings/memory/tegra114-mc.h> #include <dt-bindings/pinctrl/pinctrl-tegra.h> #include <dt-bindings/interrupt-controller/arm-gic.h> +#include <dt-bindings/soc/tegra-pmc.h>
/ { compatible = "nvidia,tegra114"; @@ -514,11 +515,12 @@ status = "disabled"; };
- pmc@7000e400 { + pmc: pmc@7000e400 { compatible = "nvidia,tegra114-pmc"; reg = <0x7000e400 0x400>; clocks = <&tegra_car TEGRA114_CLK_PCLK>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; };
fuse@7000f800 { diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi index 413bfb981de8..d0802c4ae3bf 100644 --- a/arch/arm/boot/dts/tegra124.dtsi +++ b/arch/arm/boot/dts/tegra124.dtsi @@ -6,6 +6,7 @@ #include <dt-bindings/interrupt-controller/arm-gic.h> #include <dt-bindings/reset/tegra124-car.h> #include <dt-bindings/thermal/tegra124-soctherm.h> +#include <dt-bindings/soc/tegra-pmc.h>
/ { compatible = "nvidia,tegra124"; @@ -595,11 +596,12 @@ clocks = <&tegra_car TEGRA124_CLK_RTC>; };
- pmc@7000e400 { + pmc: pmc@7000e400 { compatible = "nvidia,tegra124-pmc"; reg = <0x0 0x7000e400 0x0 0x400>; clocks = <&tegra_car TEGRA124_CLK_PCLK>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; };
fuse@7000f800 { diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi index 9c58e7fcf5c0..85a64747bec6 100644 --- a/arch/arm/boot/dts/tegra20.dtsi +++ b/arch/arm/boot/dts/tegra20.dtsi @@ -4,6 +4,7 @@ #include <dt-bindings/memory/tegra20-mc.h> #include <dt-bindings/pinctrl/pinctrl-tegra.h> #include <dt-bindings/interrupt-controller/arm-gic.h> +#include <dt-bindings/soc/tegra-pmc.h>
/ { compatible = "nvidia,tegra20"; @@ -608,11 +609,12 @@ status = "disabled"; };
- pmc@7000e400 { + pmc: pmc@7000e400 { compatible = "nvidia,tegra20-pmc"; reg = <0x7000e400 0x400>; clocks = <&tegra_car TEGRA20_CLK_PCLK>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; };
mc: memory-controller@7000f000 { diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi index 55ae050042ce..4d5e9d0001d3 100644 --- a/arch/arm/boot/dts/tegra30.dtsi +++ b/arch/arm/boot/dts/tegra30.dtsi @@ -4,6 +4,7 @@ #include <dt-bindings/memory/tegra30-mc.h> #include <dt-bindings/pinctrl/pinctrl-tegra.h> #include <dt-bindings/interrupt-controller/arm-gic.h> +#include <dt-bindings/soc/tegra-pmc.h>
/ { compatible = "nvidia,tegra30"; @@ -714,11 +715,12 @@ status = "disabled"; };
- pmc@7000e400 { + pmc: pmc@7000e400 { compatible = "nvidia,tegra30-pmc"; reg = <0x7000e400 0x400>; clocks = <&tegra_car TEGRA30_CLK_PCLK>, <&clk32k_in>; clock-names = "pclk", "clk32k_in"; + #clock-cells = <1>; };
mc: memory-controller@7000f000 {
06.12.2019 05:48, Sowjanya Komatineni пишет:
Tegra PMC has clk_out_1, clk_out_2, clk_out_3 and blink controls which are currently registered by Tegra clock driver using clk_regiser_mux and clk_register_gate which performs direct Tegra PMC register access.
When Tegra PMC is in secure mode, any access from non-secure world will not go through.
This patch series adds these Tegra PMC clocks and blink controls to Tegra PMC driver with PMC as clock provider and removed them from Tegra clock driver. This also adds PMC specific clock id's to use in device tree and removed clock ids of PMC clock from Tegra clock driver.
clk_out_1 is dedicated for audio mclk and current ASoC driver does not setting extern1 as parent for clk_out_1 and enabling clk_out_1 and currently this is taken care by Tegra clock driver during clock inits and there is no need to enable this during clock init.
So, this series also includes patch that updates ASoC driver to take care of configuring parent of mclk and enabling mclk using both extern1 and clk_out_1 and updates all device trees to use clk_out_1 from pmc as mclk incase if device tree don't specify assigned-clock-parents.
This series also includes a patch for mclk fallback to use extern1 when retrieving mclk fails with new device tree which uses pmc provider to have this backward compatible of new DT with old kernels.
This series also includes a patch to remove clock ids for these clocks from clock dt-binding as these clocks are not used in any of the existing device tree except in tegra210-smaug.dts and this series includes a patch to update clock provider from tegra_car to pmc in tegra210-smaug.dts for clk_out_2.
[v3]: Changes between v2 and v3 are
- Removes set parent of clk_out_1_mux to extern1 and enabling extern1 from the clock driver.
- Doesn't enable clk_out_1 and blink by default in pmc driver
- Updates ASoC driver to take care of audio mclk parent configuration incase if device tree don't specify assigned clock parent properties and enables mclk using both clk_out_1 and extern1.
- updates all device trees using extern1 as mclk in sound node to use clk_out_1 from pmc.
- patch for YAML format pmc dt-binding
- Includes v2 feedback
[v2]: Changes between v1 and v2 are
v2 includes patches for adding clk_out_1, clk_out_2, clk_out_3, blink controls to Tegra PMC driver and removing clk-tegra-pmc.
feedback related to pmc clocks in Tegra PMC driver from v1
Removed patches for WB0 PLLM overrides and PLLE IDDQ PMC programming by the clock driver using helper functions from Tegra PMC.
Note: To use helper functions from PMC driver, PMC early init need to happen prior to using helper functions and these helper functions are for PLLM Override and PLLE IDDQ programming in PMC during PLLM/PLLE clock registration which happen in clock_init prior to Tegra PMC probe. Moving PLLM/PLLE clocks registration to happen after Tegra PMC impacts other clocks EMC, MC and corresponding tegra_emc_init and tegra_mc_init. This implementation of configuring PMC registers thru helper functions in clock driver needs proper changes across PMC, Clock, EMC and MC inits to have it work across all Tegra platforms.
Currently PLLM Override is not enabled in the bootloader so proper patches for this fix will be taken care separately.
[v1]: v1 includes patches for below fixes.
- adding clk_out_1, clk_out_2, clk_out_3, blink controls to Tegra PMC driver and removing clk-tegra-pmc.
- updated clock provider from tegra_car to pmc in the device tree tegra210-smaug.dts that uses clk_out_2.
- Added helper functions in PMC driver for WB0 PLLM overrides and PLLE IDDQ programming to use by clock driver and updated clock driver to use these helper functions and removed direct PMC access from clock driver and all pmc base address references in clock driver.
Sowjanya Komatineni (15): dt-bindings: soc: tegra-pmc: Add Tegra PMC clock bindings dt-bindings: tegra: Convert Tegra PMC bindings to YAML soc: tegra: Add Tegra PMC clock registrations into PMC driver dt-bindings: soc: tegra-pmc: Add id for Tegra PMC blink control soc: pmc: Add blink output clock registration to Tegra PMC clk: tegra: Remove tegra_pmc_clk_init along with clk ids dt-bindings: clock: tegra: Remove pmc clock ids from clock dt-bindings ASoC: tegra: Add audio mclk control through clk_out_1 and extern1 ASoC: tegra: Add fallback for audio mclk clk: tegra: Remove extern1 and cdev1 from clocks inittable ARM: dts: tegra: Add clock-cells property to pmc
arm64: tegra: Add clock-cells property to Tegra PMC node ARM: tegra: Update sound node clocks in device tree arm64: tegra: smaug: Change clk_out_2 provider to pmc ASoC: nau8825: change Tegra clk_out_2 provider from tegra_car to pmc
Hello Sowjanya,
Something gone wrong with these patches because I didn't receive them and don't see them on the ML either.
Also, the list of email correspondents looks a bit too larger. I'm pretty sure some of the people do not care much about this series. I tend to use script/get_maintainer.pl and then manually pick the relevant people for patches.
participants (5)
-
Dmitry Osipenko
-
Greg KH
-
Mark Brown
-
Michał Mirosław
-
Sowjanya Komatineni