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@xxxxxxxxxxx> --- Changes for v4: - This patch is new in v4 .../bindings/dma/nxp,lpc3220-dmamux.yaml | 56 +++++++++++++++++++ MAINTAINERS | 9 +++ 2 files changed, 65 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..a5384b6c67fc --- /dev/null +++ b/Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml @@ -0,0 +1,56 @@ +# 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@xxxxxxxxxx> + - Piotr Wojtaszczyk <piotr.wojtaszczyk@xxxxxxxxxxx> + +allOf: + - $ref: dma-router.yaml# + +properties: + "#dma-cells": + const: 3 + description: | + First two cells same as for device pointed in dma-masters. + Third cell represents mux value for the request. + + compatible: + const: nxp,lpc3220-dmamux + + dma-masters: + description: phandle to a dma node compatible with arm,pl080 + + reg: + maxItems: 1 + +required: + - compatible + - reg + - dma-masters + +additionalProperties: false + +examples: + - | + syscon@40004000 { + compatible = "nxp,lpc3220-creg", "syscon", "simple-mfd"; + reg = <0x40004000 0x114>; + ranges = <0 0x40004000 0x114>; + #address-cells = <1>; + #size-cells = <1>; + + dma-router@7c { + compatible = "nxp,lpc3220-dmamux"; + reg = <0x7c 0x8>; + #dma-cells = <3>; + dma-masters = <&dma>; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index aacccb376c28..f7adf9f66dfa 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2396,6 +2396,15 @@ F: drivers/usb/host/ohci-nxp.c F: drivers/watchdog/pnx4008_wdt.c N: lpc32xx +ARM/LPC32XX DMAMUX SUPPORT +M: J.M.B. Downing <jonathan.downing@xxxxxxxxxx> +M: Piotr Wojtaszczyk <piotr.wojtaszczyk@xxxxxxxxxxx> +R: Vladimir Zapolskiy <vz@xxxxxxxxx> +L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers) +S: Maintained +F: Documentation/devicetree/bindings/dma/nxp,lpc3220-dmamux.yaml +N: lpc32xx + ARM/Marvell Dove/MV78xx0/Orion SOC support M: Andrew Lunn <andrew@xxxxxxx> M: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx> -- 2.25.1
