Staging: iio: adt7316: Use device tree data to set ldac_pin

Make the driver use device tree instead of the platform data.
Hence, use devm_gpiod_get_optional function to get the data from
device tree for ldac-pin and accordingly make the needed changes
in the driver.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index 2f8a122..2ff5a4e 100644 (file)
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -177,7 +177,7 @@
 
 struct adt7316_chip_info {
        struct adt7316_bus      bus;
-       u16                     ldac_pin;
+       struct gpio_desc        *ldac_pin;
        u16                     int_mask;       /* 0x2f */
        u8                      config1;
        u8                      config2;
@@ -950,8 +950,8 @@ static ssize_t adt7316_store_update_DAC(struct device *dev,
                if (ret)
                        return -EIO;
        } else {
-               gpio_set_value(chip->ldac_pin, 0);
-               gpio_set_value(chip->ldac_pin, 1);
+               gpiod_set_value(chip->ldac_pin, 0);
+               gpiod_set_value(chip->ldac_pin, 1);
        }
 
        return len;
@@ -2122,7 +2122,13 @@ int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
        else
                return -ENODEV;
 
-       chip->ldac_pin = adt7316_platform_data[1];
+       chip->ldac_pin = devm_gpiod_get_optional(dev, "adi,ldac", GPIOD_OUT_LOW);
+       if (IS_ERR(chip->ldac_pin)) {
+               ret = PTR_ERR(chip->ldac_pin);
+               dev_err(dev, "Failed to request ldac GPIO: %d\n", ret);
+               return ret;
+       }
+
        if (chip->ldac_pin) {
                chip->config3 |= ADT7316_DA_EN_VIA_DAC_LDCA;
                if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)