gpio: qcom: add direction functions for pwrkey

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>

diff --git a/drivers/gpio/qcom_pmic_gpio.c b/drivers/gpio/qcom_pmic_gpio.c
index 3be1be8692c31ed2df584e37cc2a7560d3ccfb74..65feb453ebc3802a2d10252496929cd430e60731 100644 (file)
--- 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)