Re: [PATCH] dt-bindings: i2c: Add device clock-stretch time via dts

From: Rob Herring
Date: Wed Mar 24 2021 - 13:13:08 EST


On Sat, Mar 13, 2021 at 04:07:09PM +0800, qii.wang@xxxxxxxxxxxx wrote:
> From: Qii Wang <qii.wang@xxxxxxxxxxxx>
>
> tSU,STA/tHD,STA/tSU,STOP maybe out of spec due to device
> clock-stretching or circuit loss, we could get device
> clock-stretch time from dts to adjust these parameters
> to meet the spec via EXT_CONF register.
>
> Signed-off-by: Qii Wang <qii.wang@xxxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt b/Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt
> index 7f0194f..97f66f0 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt
> @@ -32,6 +32,7 @@ Optional properties:
> - mediatek,have-pmic: platform can control i2c form special pmic side.
> Only mt6589 and mt8135 support this feature.
> - mediatek,use-push-pull: IO config use push-pull mode.
> + - clock-stretch-ns: Slave device clock-stretch time.

Should be a common I2C property?

>
> Example:
>
> --
> 1.9.1
>