/*
* Full-scale current.
*
* imax 5000 - 29800 uA (800 uA step)
*/
int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
{
u8 reg;
u8 val;
int ret;
if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX)
return -EINVAL;
val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
ret = lm3533_write(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to set max current\n");
return ret;
}
static int lm3533_als_set_target(struct iio_dev *indio_dev, unsigned channel,
unsigned zone, u8 val)
{
struct lm3533_als *als = iio_priv(indio_dev);
u8 reg;
int ret;
if (channel > LM3533_ALS_CHANNEL_CURRENT_MAX)
return -EINVAL;
if (zone > LM3533_ALS_ZONE_MAX)
return -EINVAL;
reg = lm3533_als_get_target_reg(channel, zone);
ret = lm3533_write(als->lm3533, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to set target current\n");
return ret;
}
static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
bool raising, u8 val)
{
struct lm3533_als *als = iio_priv(indio_dev);
u8 val2;
u8 reg, reg2;
int ret;
if (nr > LM3533_ALS_THRESH_MAX)
return -EINVAL;
reg = lm3533_als_get_threshold_reg(nr, raising);
reg2 = lm3533_als_get_threshold_reg(nr, !raising);
mutex_lock(&als->thresh_mutex);
ret = lm3533_read(als->lm3533, reg2, &val2);
if (ret) {
dev_err(&indio_dev->dev, "failed to get threshold\n");
goto out;
}
/*
* This device does not allow negative hysteresis (in fact, it uses
* whichever value is smaller as the lower bound) so we need to make
* sure that thresh_falling <= thresh_raising.
*/
if ((raising && (val < val2)) || (!raising && (val > val2))) {
ret = -EINVAL;
goto out;
}
ret = lm3533_write(als->lm3533, reg, val);
if (ret) {
dev_err(&indio_dev->dev, "failed to set threshold\n");
goto out;
}
out:
mutex_unlock(&als->thresh_mutex);
return ret;
}
