struct ad7192_state {
const struct ad7192_chip_info *chip_info;
struct regulator *avdd;
+ struct regulator *vref;
struct clk *mclk;
u16 int_vref_mv;
u32 fclk;
if (ret)
return dev_err_probe(&spi->dev, ret, "Failed to enable specified DVdd supply\n");
- ret = regulator_get_voltage(st->avdd);
- if (ret < 0) {
- dev_err(&spi->dev, "Device tree error, reference voltage undefined\n");
- return ret;
+ st->vref = devm_regulator_get_optional(&spi->dev, "vref");
+ if (IS_ERR(st->vref)) {
+ if (PTR_ERR(st->vref) != -ENODEV)
+ return PTR_ERR(st->vref);
+
+ ret = regulator_get_voltage(st->avdd);
+ if (ret < 0)
+ return dev_err_probe(&spi->dev, ret,
+ "Device tree error, AVdd voltage undefined\n");
+ } else {
+ ret = regulator_enable(st->vref);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable specified Vref supply\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, ad7192_reg_disable, st->vref);
+ if (ret)
+ return ret;
+
+ ret = regulator_get_voltage(st->vref);
+ if (ret < 0)
+ return dev_err_probe(&spi->dev, ret,
+ "Device tree error, Vref voltage undefined\n");
}
st->int_vref_mv = ret / 1000;