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This SSID uniquely identifies the system, which enables the driver to read the correct firmware and tuning for that system from linux-firmware. Currently there is no way of reading this property from device tree. Add an equivalent property in device tree to perform the same role. Changes since v2: - Fixed use of PTR_ERR, using PTR_ERR_OR_ZERO instead - Update commit message of patch 1 to explain why we need SSID property Changes since v1: - Fixed device tree property type Stefan Binding (2): ASoC: dt-bindings: cirrus,cs35l41: Document the cirrus,subsystem-id property ASoC: cs35l41: Fallback to reading Subsystem ID property if not ACPI .../bindings/sound/cirrus,cs35l41.yaml | 6 ++ sound/soc/codecs/cs35l41.c | 77 +++++++++++-------- 2 files changed, 50 insertions(+), 33 deletions(-) -- 2.43.0