[PATCH v3 1/5] gpio: qcom: add direction functions for pwrkey

[Dzmitry Sankouski <dsankouski@gmail.com>]

GPIO button driver requires direction functions to probe
button gpio. Those functions are blank, since pwrkey is not
really gpio, and don't support direction settings.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
---
Changes for v2:
- none
Changes for v3:
- KDPWR and RESIN not gpio: fix comment and commit message

 drivers/gpio/qcom_pmic_gpio.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpio/qcom_pmic_gpio.c b/drivers/gpio/qcom_pmic_gpio.c
index 3be1be8692..65feb453eb 100644
--- a/drivers/gpio/qcom_pmic_gpio.c
+++ b/drivers/gpio/qcom_pmic_gpio.c
@@ -303,9 +303,25 @@ static int qcom_pwrkey_get_value(struct udevice *dev, unsigned offset)
 	}
 }
 
+/*
+ * Since pmic buttons modelled as GPIO, we need empty direction functions
+ * to trick u-boot button driver
+ */
+static int qcom_pwrkey_direction_input(struct udevice *dev, unsigned int offset)
+{
+	return 0;
+}
+
+static int qcom_pwrkey_direction_output(struct udevice *dev, unsigned int offset, int value)
+{
+	return -EOPNOTSUPP;
+}
+
 static const struct dm_gpio_ops qcom_pwrkey_ops = {
 	.get_value		= qcom_pwrkey_get_value,
 	.get_function		= qcom_pwrkey_get_function,
+	.direction_input	= qcom_pwrkey_direction_input,
+	.direction_output	= qcom_pwrkey_direction_output,
 };
 
 static int qcom_pwrkey_probe(struct udevice *dev)
-- 
2.30.2