This makes use of the new devm_regulator_get_enable_read_voltage()
function to reduce boilerplate code.
Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
v2 changes:
- avoid else in return value check
- use macro instead of comment to explain internal reference voltage
---
drivers/iio/adc/ad7266.c | 33 ++++++---------------------------
1 file changed, 6 insertions(+), 27 deletions(-)
diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 353a97f9c086..874d2dc34f92 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -23,9 +23,10 @@
#include <linux/platform_data/ad7266.h>
+#define AD7266_INTERNAL_REF_MV 2500
+
struct ad7266_state {
struct spi_device *spi;
- struct regulator *reg;
unsigned long vref_mv;
struct spi_transfer single_xfer[3];
@@ -377,11 +378,6 @@ static const char * const ad7266_gpio_labels[] = {
"ad0", "ad1", "ad2",
};
-static void ad7266_reg_disable(void *reg)
-{
- regulator_disable(reg);
-}
-
static int ad7266_probe(struct spi_device *spi)
{
struct ad7266_platform_data *pdata = spi->dev.platform_data;
@@ -396,28 +392,11 @@ static int ad7266_probe(struct spi_device *spi)
st = iio_priv(indio_dev);
- st->reg = devm_regulator_get_optional(&spi->dev, "vref");
- if (!IS_ERR(st->reg)) {
- ret = regulator_enable(st->reg);
- if (ret)
- return ret;
-
- ret = devm_add_action_or_reset(&spi->dev, ad7266_reg_disable, st->reg);
- if (ret)
- return ret;
-
- ret = regulator_get_voltage(st->reg);
- if (ret < 0)
- return ret;
+ ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref");
+ if (ret < 0 && ret != -ENODEV)
+ return ret;
- st->vref_mv = ret / 1000;
- } else {
- /* Any other error indicates that the regulator does exist */
- if (PTR_ERR(st->reg) != -ENODEV)
- return PTR_ERR(st->reg);
- /* Use internal reference */
- st->vref_mv = 2500;
- }
+ st->vref_mv = ret == -ENODEV ? AD7266_INTERNAL_REF_MV : ret / 1000;
if (pdata) {
st->fixed_addr = pdata->fixed_addr;
--
2.45.2
