LPC32XX SoCs use pl080 dma controller which have few request signals multiplexed between peripherals. This binding describes how devices can use the multiplexed request signals.
Signed-off-by: Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com --- Changes for v5: - Corrected property order - Added maxItems to properties - Fixed example - Removed "N:: from the MAINTAINERS entry - Added Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com to LPC32XX maintainers
Changes for v4: - This patch is new in v4
.../bindings/dma/nxp,lpc3220-dmamux.yaml | 49 +++++++++++++++++++ MAINTAINERS | 9 ++++ 2 files changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml
diff --git a/Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml b/Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml new file mode 100644 index 000000000000..32f208744154 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/nxp,lpc3220-dmamux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: DMA multiplexer for LPC32XX SoC (DMA request router) + +maintainers: + - J.M.B. Downing jonathan.downing@nautel.com + - Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com + +allOf: + - $ref: dma-router.yaml# + +properties: + compatible: + const: nxp,lpc3220-dmamux + + reg: + maxItems: 1 + + dma-masters: + description: phandle to a dma node compatible with arm,pl080 + maxItems: 1 + + "#dma-cells": + const: 3 + description: | + First two cells same as for device pointed in dma-masters. + Third cell represents mux value for the request. + +required: + - compatible + - reg + - dma-masters + +additionalProperties: false + +examples: + - | + dma-router@7c { + compatible = "nxp,lpc3220-dmamux"; + reg = <0x7c 0x8>; + dma-masters = <&dma>; + #dma-cells = <3>; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index aacccb376c28..79b44addc139 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2384,6 +2384,7 @@ N: lpc18xx
ARM/LPC32XX SOC SUPPORT M: Vladimir Zapolskiy vz@mleia.com +M: Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Maintained T: git git://github.com/vzapolskiy/linux-lpc32xx.git @@ -2396,6 +2397,14 @@ F: drivers/usb/host/ohci-nxp.c F: drivers/watchdog/pnx4008_wdt.c N: lpc32xx
+LPC32XX DMAMUX SUPPORT +M: J.M.B. Downing jonathan.downing@nautel.com +M: Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com +R: Vladimir Zapolskiy vz@mleia.com +L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) +S: Maintained +F: Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml + ARM/Marvell Dove/MV78xx0/Orion SOC support M: Andrew Lunn andrew@lunn.ch M: Sebastian Hesselbarth sebastian.hesselbarth@gmail.com