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SubjectRe: [PATCH 4/7] dt-bindings: spi: stm32: add bindings regarding stm32h7 spi slave
On Fri, Apr 28, 2023 at 02:15:21PM +0200, Valentin Caron wrote:
> From: Alain Volmat <alain.volmat@foss.st.com>
>
> Update the spi-stm32 binding yaml regarding to the SPI slave support.

Why? What problem are you trying to solve.

>
> Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
> Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
> ---
> Documentation/devicetree/bindings/spi/st,stm32-spi.yaml | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml
> index c599eb359d56..1d26fa2658c5 100644
> --- a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml
> +++ b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml
> @@ -27,6 +27,7 @@ allOf:
> then:
> properties:
> st,spi-midi-ns: false
> + spi-slave: false
>
> properties:
> "#address-cells": true
> @@ -62,6 +63,13 @@ properties:
> - const: rx
> - const: tx
>
> + cs-gpios:
> + description:
> + In case of spi-slave not defined, cs-gpios behave as defined in
> + spi-controller.yaml.
> + In case of spi-slave defined, if <0>, indicate that SS should be
> + detected via the dedicated HW pin

I don't understand. I though cs-gpios was for master mode. You want to
define 'cs-gpios = <0>;'? How would that be different than just omitting
cs-gpios?

Rob

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