Re: [PATCH dt-schema] schemas: i2c: add optional GPIO binding for SMBALERT# line

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On Mon, Sep 9, 2024 at 5:58 AM Wolfram Sang
<wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> Most I2C controllers do not have a dedicated pin for SMBus Alerts. Allow
> them to define a GPIO as a side-channel.

Most GPIOs are also interrupts, so shouldn't the existing binding be
sufficient? The exception is if the GPIO needs to be polled.

>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> ---
>  dtschema/schemas/i2c/i2c-controller.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/dtschema/schemas/i2c/i2c-controller.yaml b/dtschema/schemas/i2c/i2c-controller.yaml
> index 97d0aaa..487e669 100644
> --- a/dtschema/schemas/i2c/i2c-controller.yaml
> +++ b/dtschema/schemas/i2c/i2c-controller.yaml
> @@ -135,6 +135,11 @@ properties:
>        use this information to detect a stalled bus more reliably, for example.
>        Can not be combined with 'multi-master'.
>
> +  smbalert-gpios:
> +    maxItems: 1
> +    description:
> +      Specifies the GPIO used for the SMBALERT# line. Optional.
> +
>    smbus:
>      type: boolean
>      description:
> --
> 2.43.0
>
>





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