Some regulators can supply multiple voltages. To take changing voltages
into account, the scale needs to be calculated on every read access.
Signed-off-by: Hartmut Knaack <knaack.h@xxxxxx>
---
drivers/iio/dac/m62332.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/iio/dac/m62332.c b/drivers/iio/dac/m62332.c
index fdb3e042c14d..76e8b044b979 100644
--- a/drivers/iio/dac/m62332.c
+++ b/drivers/iio/dac/m62332.c
@@ -31,7 +31,6 @@
struct m62332_data {
struct i2c_client *client;
- u16 vref_mv;
struct regulator *vcc;
struct mutex mutex;
u8 raw[M62332_CHANNELS];
@@ -89,11 +88,16 @@ static int m62332_read_raw(struct iio_dev *indio_dev,
long mask)
{
struct m62332_data *data = iio_priv(indio_dev);
+ int ret;
switch (mask) {
case IIO_CHAN_INFO_SCALE:
/* Corresponds to Vref / 2^(bits) */
- *val = data->vref_mv;
+ ret = regulator_get_voltage(data->vcc);
+ if (ret < 0)
+ return ret;
+
+ *val = ret / 1000; /* mV */
*val2 = 8;
return IIO_VAL_FRACTIONAL_LOG2;
@@ -218,11 +222,6 @@ static int m62332_probe(struct i2c_client *client,
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &m62332_info;
- ret = regulator_get_voltage(data->vcc);
- if (ret < 0)
- return ret;
- data->vref_mv = ret / 1000; /* mV */
-
ret = iio_map_array_register(indio_dev, client->dev.platform_data);
if (ret < 0)
return ret;
--
2.4.6
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