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path: root/drivers/iio/addac/ad74413r.c
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Diffstat (limited to 'drivers/iio/addac/ad74413r.c')
-rw-r--r--drivers/iio/addac/ad74413r.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c
index 6b0e8218f1..7af3e4b8fe 100644
--- a/drivers/iio/addac/ad74413r.c
+++ b/drivers/iio/addac/ad74413r.c
@@ -442,11 +442,29 @@ static int ad74413r_set_channel_function(struct ad74413r_state *st,
int ret;
ret = regmap_update_bits(st->regmap,
+ AD74413R_REG_CH_FUNC_SETUP_X(channel),
+ AD74413R_CH_FUNC_SETUP_MASK,
+ CH_FUNC_HIGH_IMPEDANCE);
+ if (ret)
+ return ret;
+
+ /* Set DAC code to 0 prior to changing channel function */
+ ret = ad74413r_set_channel_dac_code(st, channel, 0);
+ if (ret)
+ return ret;
+
+ /* Delay required before transition to new desired mode */
+ usleep_range(130, 150);
+
+ ret = regmap_update_bits(st->regmap,
AD74413R_REG_CH_FUNC_SETUP_X(channel),
AD74413R_CH_FUNC_SETUP_MASK, func);
if (ret)
return ret;
+ /* Delay required before updating the new DAC code */
+ usleep_range(150, 170);
+
if (func == CH_FUNC_CURRENT_INPUT_LOOP_POWER)
ret = regmap_set_bits(st->regmap,
AD74413R_REG_ADC_CONFIG_X(channel),
@@ -705,8 +723,8 @@ static int ad74413r_get_input_current_scale(struct ad74413r_state *st,
return IIO_VAL_FRACTIONAL;
}
-static int ad74413_get_input_current_offset(struct ad74413r_state *st,
- unsigned int channel, int *val)
+static int ad74413r_get_input_current_offset(struct ad74413r_state *st,
+ unsigned int channel, int *val)
{
unsigned int range;
int voltage_range;
@@ -991,7 +1009,7 @@ static int ad74413r_read_raw(struct iio_dev *indio_dev,
return ad74413r_get_input_voltage_offset(st,
chan->channel, val);
case IIO_CURRENT:
- return ad74413_get_input_current_offset(st,
+ return ad74413r_get_input_current_offset(st,
chan->channel, val);
default:
return -EINVAL;