[alsa-devel] [PATCH v2 1/9] dt-bindings: sound: tegra: add DT binding for AHUB
Rob Herring
robh at kernel.org
Thu Feb 6 19:10:45 CET 2020
On Thu, Jan 30, 2020 at 04:03:34PM +0530, Sameer Pujar wrote:
> Audio Hub (AHUB) comprises a collection of hardware accelerators for audio
> pre-processing and post-processing and a programmable full crossbar for
> audio routing across these accelerators. This patch adds YAML schema for DT
> binding of AHUB and few of its following components. These devices will be
> registered as ASoC components.
> * ADMAIF
> * I2S
> * DMIC
> * DSPK
>
> Signed-off-by: Sameer Pujar <spujar at nvidia.com>
> ---
> .../bindings/sound/nvidia,tegra186-dspk.yaml | 105 +++++++++++++
> .../bindings/sound/nvidia,tegra210-admaif.yaml | 165 +++++++++++++++++++++
> .../bindings/sound/nvidia,tegra210-ahub.yaml | 130 ++++++++++++++++
> .../bindings/sound/nvidia,tegra210-dmic.yaml | 105 +++++++++++++
> .../bindings/sound/nvidia,tegra210-i2s.yaml | 112 ++++++++++++++
> 5 files changed, 617 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-dmic.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-i2s.yaml
>
> diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
> new file mode 100644
> index 0000000..dc9fef3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: (GPL-2.0)
Dual license new bindings:
(GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/nvidia,tegra186-dspk.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tegra186 DSPK Controller Device Tree Bindings
> +
> +description: |
> + The Digital Speaker Controller (DSPK) can be viewed as a Pulse
> + Density Modulation (PDM) transmitter that up-samples the input to
> + the desired sampling rate by interpolation and then converts the
> + over sampled Pulse Code Modulation (PCM) input to the desired 1-bit
> + output via Delta Sigma Modulation (DSM).
> +
> +maintainers:
> + - Jon Hunter <jonathanh at nvidia.com>
> + - Sameer Pujar <spujar at nvidia.com>
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
Drop 'items' for a single entry.
> + const: nvidia,tegra186-dspk
> + - items:
> + - enum:
> + - nvidia,tegra194-dspk
> + - enum:
> + - nvidia,tegra186-dspk
This can be a 'const'
> +
> + reg:
> + description: offset and length of the register set for the device.
That's every 'reg'. Drop.
> + maxItems: 1
> +
> + clocks:
> + description: must contain an entry for each entry in clock-names.
> + See ../clocks/clocks-bindings.txt for details.
> + minItems: 1
Drop description and minItems. minItems is implied by the length of
'items'.
> + items:
> + - description: Module clock
> +
> + clock-names:
> + description: must contain clock names for each corresponding entry in clocks.
> + See ../clocks/clocks-bindings.txt for details.
> + minItems: 1
ditto
> + items:
> + - const: dspk
> +
> + assigned-clocks:
> + description: list of input clocks and dividers for the audio system.
> + See ../clocks/clock-bindings.txt for details.
> + minItems: 1
ditto
> + items:
> + - description: Module clock
> +
> + assigned-clock-parents:
> + description: parent clock for each entry in assigned-clocks
> + See ../clocks/clock-bindings.txt for details.
> + minItems: 1
ditto
> + items:
> + - description: Parent for module clock
> +
> + assigned-clock-rates:
> + description: clock rate for each entry in assigned-clocks
> + See ../clocks/clock-bindings.txt for details.
ditto
> + items:
> + - description: initial module clock rate
> +
> + "#sound-dai-cells":
> + const: 1
> +
> + sound-name-prefix:
> + $ref: /schemas/types.yaml#/definitions/string
> + description:
> + Used as prefix for sink/source names of the component. Must be a
> + unique string among multiple instances of the same component.
> + The name can be "DSPK1" or "DSPKx", where x depends on the maximum
Sounds like a constraint.
> + available instances on a Tegra SoC.
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - assigned-clocks
> + - assigned-clock-parents
> + - "#sound-dai-cells"
> +
> +examples:
> + - |
> + #include<dt-bindings/clock/tegra186-clock.h>
> +
> + tegra_dspk1: dspk at 2905000 {
> + compatible = "nvidia,tegra186-dspk";
> + reg = <0x2905000 0x100>;
> + clocks = <&bpmp TEGRA186_CLK_DSPK1>;
> + clock-names = "dspk";
> + assigned-clocks = <&bpmp TEGRA186_CLK_DSPK1>;
> + assigned-clock-parents = <&bpmp TEGRA186_CLK_PLL_A_OUT0>;
> + assigned-clock-rates = <12288000>;
> + #sound-dai-cells = <1>;
> + sound-name-prefix = "DSPK1";
> + };
> +
> +...
> diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
> new file mode 100644
> index 0000000..a8a41ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
> @@ -0,0 +1,165 @@
> +# SPAT-License-Identifier: (GPL-2.0)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/nvidia,tegra210-admaif.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tegra210 ADMAIF Device Tree Bindings
> +
> +description: |
> + ADMAIF is the interface between ADMA and AHUB. Each ADMA channel
> + that sends/receives data to/from AHUB must interface through an
> + ADMAIF channel. ADMA channel sending data to AHUB pairs with ADMAIF
> + Tx channel and ADMA channel receiving data from AHUB pairs with
> + ADMAIF Rx channel.
> +
> +maintainers:
> + - Jon Hunter <jonathanh at nvidia.com>
> + - Sameer Pujar <spujar at nvidia.com>
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + const: nvidia,tegra210-admaif
> + - items:
> + const: nvidia,tegra186-admaif
These 2 can be a single enum.
> + - items:
> + - enum:
> + - nvidia,tegra194-admaif
> + - enum:
> + - nvidia,tegra186-admaif
> +
> + reg:
> + maxItems: 1
> +
> + dmas: true
> +
> + dma-names: true
> +
> + "#sound-dai-cells":
> + const: 1
> +
> +if:
> + properties:
> + compatible:
> + contains:
> + const: nvidia,tegra210-admaif
> +
> +then:
> + properties:
> + dmas:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
Drop. Common properties already have a type.
Plus this is wrong. A '$ref' means all other keywords are ignored (until
we move to draft8).
> + description:
> + Two or more DMA channel specifiers, equally divided for Tx and Rx.
> + minItems: 2
> + maxItems: 20
> + dma-names:
> + $ref: /schemas/types.yaml#/definitions/string-array
drop
> + description:
> + There must be at least one channel named "tx1" for transmit and "rx1"
> + for receive. If more channels need to be specified then "tx1",
> + "tx2" ... "tx10" can be used. Similarly for Rx channels as well.
Sounds like constraints.
Stopping there. Similar issues on the rest...
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