From 3fe5a963c63119f2d762327fba8e8b3fdd731fb4 Mon Sep 17 00:00:00 2001 From: Tzung-Bi Shih Date: Thu, 17 Oct 2019 22:00:11 +0800 Subject: [PATCH] ASoC: dt-bindings: cros_ec_codec: add SHM bindings - Add "reg" for binding to shared memory exposed by EC. - Add "memory-region" for binding to memory region shared by AP. Acked-by: Rob Herring Acked-by: Benson Leung Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20191017213539.06.I0df85fe54162426e31f60a589d9b461c65df2faa@changeid Signed-off-by: Mark Brown --- .../bindings/sound/google,cros-ec-codec.txt | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt b/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt index 0ce9fafc78e2..8ca52dcc5572 100644 --- a/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt +++ b/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt @@ -10,8 +10,26 @@ Required properties: - compatible: Must contain "google,cros-ec-codec" - #sound-dai-cells: Should be 1. The cell specifies number of DAIs. +Optional properties: +- reg: Pysical base address and length of shared memory region from EC. + It contains 3 unsigned 32-bit integer. The first 2 integers + combine to become an unsigned 64-bit physical address. The last + one integer is length of the shared memory. +- memory-region: Shared memory region to EC. A "shared-dma-pool". See + ../reserved-memory/reserved-memory.txt for details. + Example: +{ + ... + + reserved_mem: reserved_mem { + compatible = "shared-dma-pool"; + reg = <0 0x52800000 0 0x100000>; + no-map; + }; +} + cros-ec@0 { compatible = "google,cros-ec-spi"; @@ -20,5 +38,7 @@ cros-ec@0 { cros_ec_codec: ec-codec { compatible = "google,cros-ec-codec"; #sound-dai-cells = <1>; + reg = <0x0 0x10500000 0x80000>; + memory-region = <&reserved_mem>; }; }; -- 2.45.2