| Message ID | 20230428121524.2125832-5-valentin.caron@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | spi: stm32: add spi slave mode | expand |
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
On 4/28/23 23:46, Rob Herring wrote: > 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. To add some documentation about cs-gpios and don't allow to use spi-slave property with st,stm32f4-spi compatible. I will specify this in next patchset. > >> 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 We try to keep consistency with spi master, but, as you said, it is useless. I will remove it in next patchset. Thanks, Valentin
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 + patternProperties: "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$": type: object