Re: [PATCH v2] i2c: designware: select gpio/default pin when prepare/unprepare recovery

[Jarkko Nikula]

On 09/13/2018 11:21 AM, Jisheng Zhang wrote:
> On some platforms, the sda/scl pins are muxed with gpio functions, so
> they could be used for recovery. Select the gpio/default pin function
> when prepare/unprepare recovery.
>
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@xxxxxxxxxxxxx>
> ---
>
> since v1:
>   - use IS_ERR_OR_NULL
>
>   drivers/i2c/busses/i2c-designware-core.h   |  3 +++
>   drivers/i2c/busses/i2c-designware-master.c | 22 ++++++++++++++++++++++
>   2 files changed, 25 insertions(+)
...
> +	pinctrl = devm_pinctrl_get(dev->dev);
> +	if (PTR_ERR(pinctrl) == -EPROBE_DEFER)
> +		return -EPROBE_DEFER;
> +	if (!IS_ERR_OR_NULL(pinctrl)) {
> +		dev->pinctrl = pinctrl;
> +		s = pinctrl_lookup_state(pinctrl, PINCTRL_STATE_DEFAULT);
> +		if (!IS_ERR_OR_NULL(s))
> +			dev->pins_default = s;
> +		s = pinctrl_lookup_state(pinctrl, "gpio");
> +		if (!IS_ERR_OR_NULL(s))
> +			dev->pins_gpio = s;
> +	}
> +

Should these be documented in 
Documentation/devicetree/bindings/i2c/i2c-designware.txt?

--
Jarkko