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




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