[PATCH 1/2] dt-bindings: spi: qcom-geni: Document device-gpios property
Praveen Talari <[email protected]>
| Newsgroups | org.kernel.vger.linux-spi,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <20260806-use_gpio_to_notify_master_of_spi_target_activity-v1-1-c363a9b5df69@oss.qualcomm.com> |
When operating in SPI target (slave) mode, the GENI SPI controller can use an external GPIO to notify the SPI master about the target's active state. Document the optional device-gpios property for the qcom,spi-geni-qcom and qcom,sa8255p-geni-spi bindings, restricted to spi-slave nodes. Signed-off-by: Praveen Talari <[email protected]> --- Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml | 9 +++++++++ Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml | 9 +++++++++ 2 files changed, 18 insertions(+) diff --git a/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml b/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml index 6552303a4f52..aa75cd6dab13 100644 --- a/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml +++ b/Documentation/devicetree/bindings/spi/qcom,sa8255p-geni-spi.yaml @@ -39,6 +39,12 @@ properties: - const: power - const: perf + device-gpios: + description: + GPIO used by the SPI target to notify the SPI master when it is + ready to service a transfer. Only applicable in target (slave) mode. + maxItems: 1 + required: - compatible - reg @@ -46,6 +52,9 @@ required: - power-domains - power-domain-names +dependencies: + device-gpios: [ spi-slave ] + allOf: - $ref: /schemas/spi/spi-controller.yaml# diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml index edf399681d7a..d97f928e206c 100644 --- a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml +++ b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml @@ -67,6 +67,12 @@ properties: reg: maxItems: 1 + device-gpios: + description: + GPIO used by the SPI target to notify the SPI master when it is + ready to service a transfer. Only applicable in target (slave) mode. + maxItems: 1 + required: - compatible - clocks @@ -74,6 +80,9 @@ required: - interrupts - reg +dependencies: + device-gpios: [ spi-slave ] + unevaluatedProperties: false examples: -- 2.34.1