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