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SubjectRe: [PATCH v2] i2c: designware: select gpio/default pin when prepare/unprepare recovery
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Date
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@synaptics.com>
> ---
>
> 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

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