diff options
Diffstat (limited to 'drivers/iio/dac/ad7293.c')
| -rw-r--r-- | drivers/iio/dac/ad7293.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/iio/dac/ad7293.c b/drivers/iio/dac/ad7293.c index d3f49b5337d2..c3797e40cdd9 100644 --- a/drivers/iio/dac/ad7293.c +++ b/drivers/iio/dac/ad7293.c @@ -114,6 +114,7 @@ #define AD7293_REG_DATA_RAW_MSK GENMASK(15, 4) #define AD7293_REG_VINX_RANGE_GET_CH_MSK(x, ch) (((x) >> (ch)) & 0x1) #define AD7293_REG_VINX_RANGE_SET_CH_MSK(x, ch) (((x) & 0x1) << (ch)) +#define AD7293_GENERAL_ADC_REF_MSK BIT(7) #define AD7293_CHIP_ID 0x18 enum ad7293_ch_type { @@ -141,6 +142,7 @@ struct ad7293_state { /* Protect against concurrent accesses to the device, page selection and data content */ struct mutex lock; struct gpio_desc *gpio_reset; + bool vrefin_en; u8 page_select; u8 data[3] __aligned(IIO_DMA_MINALIGN); }; @@ -785,6 +787,12 @@ static int ad7293_properties_parse(struct ad7293_state *st) if (ret) return dev_err_probe(&spi->dev, ret, "failed to enable VDRIVE\n"); + ret = devm_regulator_get_enable_optional(&spi->dev, "vrefin"); + if (ret < 0 && ret != -ENODEV) + return dev_err_probe(&spi->dev, ret, "failed to enable VREFIN\n"); + + st->vrefin_en = ret != -ENODEV; + st->gpio_reset = devm_gpiod_get_optional(&st->spi->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(st->gpio_reset)) @@ -818,6 +826,11 @@ static int ad7293_init(struct ad7293_state *st) return -EINVAL; } + if (!st->vrefin_en) + return __ad7293_spi_update_bits(st, AD7293_REG_GENERAL, + AD7293_GENERAL_ADC_REF_MSK, + AD7293_GENERAL_ADC_REF_MSK); + return 0; } @@ -859,13 +872,13 @@ static int ad7293_probe(struct spi_device *spi) static const struct spi_device_id ad7293_id[] = { { "ad7293", 0 }, - {} + { } }; MODULE_DEVICE_TABLE(spi, ad7293_id); static const struct of_device_id ad7293_of_match[] = { { .compatible = "adi,ad7293" }, - {} + { } }; MODULE_DEVICE_TABLE(of, ad7293_of_match); |