[PATCH 2/4] Input: silead_gsl1680: gpiod_get returning -EBUSY is not an error
From: Hans de Goede <hidden>
Date: 2016-12-09 10:35:27
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, silead touchscreen driver, the rest · Maintainers:
Dmitry Torokhov, Hans de Goede, Linus Torvalds
ACPI gpios may return -EBUSY this means that the gpio is owned by the ACPI code, and will be set / cleared as needed by the ACPI code. Treat gpiod_get returning -EBUSY as not having a gpio, fixing the driver not loading on tablets where this happens. Signed-off-by: Hans de Goede <redacted> --- drivers/input/touchscreen/silead.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
index f502c84..4387cd8 100644
--- a/drivers/input/touchscreen/silead.c
+++ b/drivers/input/touchscreen/silead.c@@ -467,6 +467,14 @@ static int silead_ts_probe(struct i2c_client *client, /* Power GPIO pin */ data->gpio_power = devm_gpiod_get_optional(dev, "power", GPIOD_OUT_LOW); +#ifdef CONFIG_ACPI + /* + * ACPI gpios may return -EBUSY this means that the gpio is owned by + * the ACPI code, and will be set / cleared by the ACPI code. + */ + if (IS_ERR(data->gpio_power) && PTR_ERR(data->gpio_power) == -EBUSY) + data->gpio_power = NULL; +#endif if (IS_ERR(data->gpio_power)) { if (PTR_ERR(data->gpio_power) != -EPROBE_DEFER) dev_err(dev, "Shutdown GPIO request failed\n");
--
2.9.3