| Message ID | 20230924152149.41884-1-alisadariana@gmail.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v2] iio: adc: ad7192: Correct reference voltage | expand |
On Sun, 24 Sep 2023 18:21:48 +0300 alisadariana@gmail.com wrote: > From: Alisa-Dariana Roman <alisa.roman@analog.com> > > The avdd and the reference voltage are two different sources but the > reference voltage was assigned according to the avdd supply. > > Add vref regulator structure and set the reference voltage according to > the vref supply from the devicetree. > > In case vref supply is missing, reference voltage is set according to > the avdd supply for compatibility with old devicetrees. > > Fixes: b581f748cce0 ("staging: iio: adc: ad7192: move out of staging") > Signed-off-by: Alisa-Dariana Roman <alisa.roman@analog.com> > Cc: stable@vger.kernel.org Applied to the fixes-togreg branch of iio.git Thanks, Jonathan > --- > v1 -> v2 > - use dev_err_probe() > Link: https://lore.kernel.org/lkml/20230923225827.75681-1-alisadariana@gmail.com/ > > drivers/iio/adc/ad7192.c | 29 +++++++++++++++++++++++++---- > 1 file changed, 25 insertions(+), 4 deletions(-) > > diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c > index 69d1103b9508..b64fd365f83f 100644 > --- a/drivers/iio/adc/ad7192.c > +++ b/drivers/iio/adc/ad7192.c > @@ -177,6 +177,7 @@ struct ad7192_chip_info { > 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; > @@ -1008,10 +1009,30 @@ static int ad7192_probe(struct spi_device *spi) > 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; >
diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c index 69d1103b9508..b64fd365f83f 100644 --- a/drivers/iio/adc/ad7192.c +++ b/drivers/iio/adc/ad7192.c @@ -177,6 +177,7 @@ struct ad7192_chip_info { 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; @@ -1008,10 +1009,30 @@ static int ad7192_probe(struct spi_device *spi) 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;