[PATCH 1/3] spi: dt-bindings: amlogic: spisg: Document A9-specific properties
Xianwei Zhao via B4 Relay <[email protected]>
| Newsgroups | org.kernel.vger.linux-spi,org.infradead.lists.linux-amlogic,org.kernel.feeds.b4-sent,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel |
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From: Xianwei Zhao <[email protected]> Document the Amlogic A9 SPISG controller and its additional Device Tree properties. Add the "amlogic,a9-spisg" compatible string and define the A9-specific "amlogic,mo-idle-output" and "amlogic,word-gap" properties, which configure the MOSI idle output level and the inter-word gap, respectively. Signed-off-by: Xianwei Zhao <[email protected]> --- .../devicetree/bindings/spi/amlogic,a4-spisg.yaml | 36 +++++++++++++++++++--- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/spi/amlogic,a4-spisg.yaml b/Documentation/devicetree/bindings/spi/amlogic,a4-spisg.yaml index 9bfb8089f7ea..7efdc748d566 100644 --- a/Documentation/devicetree/bindings/spi/amlogic,a4-spisg.yaml +++ b/Documentation/devicetree/bindings/spi/amlogic,a4-spisg.yaml @@ -11,12 +11,11 @@ maintainers: - Xianwei Zhao <[email protected]> - Sunny Luo <[email protected]> -allOf: - - $ref: spi-controller.yaml# - properties: compatible: - const: amlogic,a4-spisg + enum: + - amlogic,a4-spisg + - amlogic,a9-spisg reg: maxItems: 1 @@ -42,6 +41,35 @@ required: - clocks - clock-names +allOf: + - $ref: spi-controller.yaml# + - if: + properties: + compatible: + contains: + enum: + - amlogic,a9-spisg + then: + properties: + amlogic,mo-idle-output: + description: | + Controls the MOSI output level when the controller is idle. + + 0 - Drive MOSI low + 1 - Drive MOSI high + 2 - Follow the last transmitted bit + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2] + default: 0 + + amlogic,word-gap: + description: | + Number of idle clock cycles inserted between consecutive SPI + words. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3] + default: 1 + unevaluatedProperties: false examples: -- 2.52.0