[Patch v5 02/12] dt-bindings: dma: Add lpc32xx DMA mux binding
From: Piotr Wojtaszczyk <piotr.wojtaszczyk@timesys.com>
Date: 2024-06-27 15:01:58
Also in:
alsa-devel, dmaengine, linux-arm-kernel, linux-clk, linux-devicetree, linux-i2c, linux-sound, lkml
Subsystem:
dma generic offload engine subsystem, lpc32xx dmamux support, open firmware and flattened device tree bindings, the rest · Maintainers:
Vinod Koul, J.M.B. Downing, Piotr Wojtaszczyk, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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 [off-list ref] 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>
--
2.25.1