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path: root/drivers/iio/dac/ad7293.c
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Diffstat (limited to 'drivers/iio/dac/ad7293.c')
-rw-r--r--drivers/iio/dac/ad7293.c17
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);