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 <hdegoede@xxxxxxxxxx>
---
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
--
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