| Message ID | 20211227083641.12538-2-axe.yang@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mmc: mediatek: add support for SDIO async int | expand |
On Mon, Dec 27, 2021 at 04:36:39PM +0800, Axe Yang wrote: > Asynchronous interrupt is a mechanism that allow SDIO devices alarm > interrupt when host stop providing clock to card. Add a DT flag to > enable this feature if it is supported by SDIO card. A card property should be in the card node. Is this not discoverable? > > Signed-off-by: Axe Yang <axe.yang@mediatek.com> > --- > Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > index 25ac8e200970..7230421583c6 100644 > --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > @@ -165,6 +165,11 @@ properties: > description: > eMMC hardware reset is supported > > + cap-sdio-async-int: Perhaps be consistent with the next property and use 'irq'. > + $ref: /schemas/types.yaml#/definitions/flag > + description: > + SDIO async interrupt is supported. > + > cap-sdio-irq: > $ref: /schemas/types.yaml#/definitions/flag > description: > -- > 2.25.1 > >
On Tue, 2022-01-04 at 16:33 -0600, Rob Herring wrote: > On Mon, Dec 27, 2021 at 04:36:39PM +0800, Axe Yang wrote: > > Asynchronous interrupt is a mechanism that allow SDIO devices alarm > > interrupt when host stop providing clock to card. Add a DT flag to > > enable this feature if it is supported by SDIO card. > > A card property should be in the card node. Is this not discoverable? Thank you for your comment. Async interrupt is not a 'card property', but more like a protocol. The intention of this flag is to decide whether to support this feature on SDIO host side. Before that, host need to confirm that async interrupt is supported on card side(by read and parse Support Async Interrupt segment in CCCR from card). > > > > > Signed-off-by: Axe Yang <axe.yang@mediatek.com> > > --- > > Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 > > +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/mmc/mmc- > > controller.yaml b/Documentation/devicetree/bindings/mmc/mmc- > > controller.yaml > > index 25ac8e200970..7230421583c6 100644 > > --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > > +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > > @@ -165,6 +165,11 @@ properties: > > description: > > eMMC hardware reset is supported > > > > + cap-sdio-async-int: > > Perhaps be consistent with the next property and use 'irq'. Will fix it in next version. > > > + $ref: /schemas/types.yaml#/definitions/flag > > + description: > > + SDIO async interrupt is supported. > > + > > cap-sdio-irq: > > $ref: /schemas/types.yaml#/definitions/flag > > description: > > -- > > 2.25.1 > > > >
diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml index 25ac8e200970..7230421583c6 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml @@ -165,6 +165,11 @@ properties: description: eMMC hardware reset is supported + cap-sdio-async-int: + $ref: /schemas/types.yaml#/definitions/flag + description: + SDIO async interrupt is supported. + cap-sdio-irq: $ref: /schemas/types.yaml#/definitions/flag description:
Asynchronous interrupt is a mechanism that allow SDIO devices alarm interrupt when host stop providing clock to card. Add a DT flag to enable this feature if it is supported by SDIO card. Signed-off-by: Axe Yang <axe.yang@mediatek.com> --- Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 +++++ 1 file changed, 5 insertions(+)