From f8673e4069b2032bf9f854bae818a7bdbdca7520 Mon Sep 17 00:00:00 2001 From: Stefan Binding Date: Wed, 17 Sep 2025 16:37:11 +0100 Subject: [PATCH] ASoC: dt-bindings: cirrus,cs35l41: Document the cirrus,subsystem-id property Add new property: cirrus,subsystem-id This new property is used to uniquely identify the system if device tree is used, to allow the driver to select the correct firmware and tuning for the system. The DSP driver searches for a compatible firmware (and tuning) based on what it is able to read from the hardware. However, the SSID is based on the system, and cannot be read from the hardware, therefore it needs to be read from the Device Tree. On ACPI-based systems, it is able to read this from the ACPI _SUB property, and to maintain compatibility with the driver between ACPI and Device Tree systems we need an equivalent property. Signed-off-by: Stefan Binding Link: https://patch.msgid.link/20250917153722.94978-2-sbinding@opensource.cirrus.com Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml b/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml index 14dea1feefc5a..e6cf2ebcd7771 100644 --- a/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml +++ b/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml @@ -151,6 +151,12 @@ properties: minimum: 0 maximum: 5 + cirrus,subsystem-id: + $ref: /schemas/types.yaml#/definitions/string + description: + Subsystem ID. If this property is present, it sets the system name, + used to identify the firmware and tuning to load. + required: - compatible - reg -- 2.47.3