static int ltr501_read_event_config(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir)
{
struct ltr501_data *data = iio_priv(indio_dev);
int ret, status;
switch (chan->type) {
case IIO_INTENSITY:
ret = regmap_field_read(data->reg_als_intr, &status);
if (ret < 0)
return ret;
return status;
case IIO_PROXIMITY:
ret = regmap_field_read(data->reg_ps_intr, &status);
if (ret < 0)
return ret;
return status;
default:
return -EINVAL;
}
return -EINVAL;
}
static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
{
struct da9063_regulator *regl = rdev_get_drvdata(rdev);
struct regmap_field *field;
int ret, val;
/* Detect current regulator state */
ret = regmap_field_read(regl->suspend, &val);
if (ret < 0)
return 0;
/* Read regulator mode from proper register, depending on state */
if (val)
field = regl->suspend_sleep;
else
field = regl->sleep;
ret = regmap_field_read(field, &val);
if (ret < 0)
return 0;
if (val)
return REGULATOR_MODE_STANDBY;
else
return REGULATOR_MODE_NORMAL;
}
/* Callback to get temperature from HW*/
static int st_thermal_get_temp(struct thermal_zone_device *th,
unsigned long *temperature)
{
struct st_thermal_sensor *sensor = th->devdata;
struct device *dev = sensor->dev;
unsigned int temp;
unsigned int overflow;
int ret;
ret = regmap_field_read(sensor->overflow, &overflow);
if (ret)
return ret;
if (overflow)
return -EIO;
ret = regmap_field_read(sensor->temp_data, &temp);
if (ret)
return ret;
temp += sensor->cdata->temp_adjust_val;
temp = mcelsius(temp);
dev_dbg(dev, "temperature: %d\n", temp);
*temperature = temp;
return 0;
}
static int st_thermal_calibration(struct st_thermal_sensor *sensor)
{
int ret;
unsigned int val;
struct device *dev = sensor->dev;
/* Check if sensor calibration data is already written */
ret = regmap_field_read(sensor->dcorrect, &val);
if (ret) {
dev_err(dev, "failed to read calibration data\n");
return ret;
}
if (!val) {
/*
* Sensor calibration value not set by bootloader,
* default calibration data to be used
*/
ret = regmap_field_write(sensor->dcorrect,
sensor->cdata->calibration_val);
if (ret)
dev_err(dev, "failed to set calibration data\n");
}
return ret;
}
static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
{
struct da9063_regulator *regl = rdev_get_drvdata(rdev);
struct regmap_field *field;
unsigned int val, mode = 0;
int ret;
ret = regmap_field_read(regl->mode, &val);
if (ret < 0)
return ret;
switch (val) {
default:
case BUCK_MODE_MANUAL:
mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
/* Sleep flag bit decides the mode */
break;
case BUCK_MODE_SLEEP:
return REGULATOR_MODE_STANDBY;
case BUCK_MODE_SYNC:
return REGULATOR_MODE_FAST;
case BUCK_MODE_AUTO:
return REGULATOR_MODE_NORMAL;
}
/* Detect current regulator state */
ret = regmap_field_read(regl->suspend, &val);
if (ret < 0)
return 0;
/* Read regulator mode from proper register, depending on state */
if (val)
field = regl->suspend_sleep;
else
field = regl->sleep;
ret = regmap_field_read(field, &val);
if (ret < 0)
return 0;
if (val)
mode &= REGULATOR_MODE_STANDBY;
else
mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
return mode;
}
static int syscfg_reset_status(struct reset_controller_dev *rcdev,
unsigned long idx)
{
struct syscfg_reset_controller *rst = to_syscfg_reset_controller(rcdev);
const struct syscfg_reset_channel *ch;
u32 ret_val = 0;
int err;
if (idx >= rcdev->nr_resets)
return -EINVAL;
ch = &rst->channels[idx];
if (ch->ack)
err = regmap_field_read(ch->ack, &ret_val);
else
err = regmap_field_read(ch->reset, &ret_val);
if (err)
return err;
return rst->active_low ? !ret_val : !!ret_val;
}
static int ina3221_read_curr(struct device *dev, u32 attr,
int channel, long *val)
{
struct ina3221_data *ina = dev_get_drvdata(dev);
struct ina3221_input *input = &ina->inputs[channel];
int resistance_uo = input->shunt_resistor;
u8 reg = ina3221_curr_reg[attr][channel];
int regval, voltage_nv, ret;
switch (attr) {
case hwmon_curr_input:
if (!ina3221_is_enabled(ina, channel))
return -ENODATA;
/* Write CONFIG register to trigger a single-shot measurement */
if (ina->single_shot)
regmap_write(ina->regmap, INA3221_CONFIG,
ina->reg_config);
ret = ina3221_wait_for_data(ina);
if (ret)
return ret;
/* fall through */
case hwmon_curr_crit:
case hwmon_curr_max:
ret = ina3221_read_value(ina, reg, ®val);
if (ret)
return ret;
/* Scale of shunt voltage: LSB is 40uV (40000nV) */
voltage_nv = regval * 40000;
/* Return current in mA */
*val = DIV_ROUND_CLOSEST(voltage_nv, resistance_uo);
return 0;
case hwmon_curr_crit_alarm:
case hwmon_curr_max_alarm:
/* No actual register read if channel is disabled */
if (!ina3221_is_enabled(ina, channel)) {
/* Return 0 for alert flags */
*val = 0;
return 0;
}
ret = regmap_field_read(ina->fields[reg], ®val);
if (ret)
return ret;
*val = regval;
return 0;
default:
return -EOPNOTSUPP;
}
}
static int ltr501_read_intr_prst(struct ltr501_data *data,
enum iio_chan_type type,
int *val2)
{
int ret, samp_period, prst;
switch (type) {
case IIO_INTENSITY:
ret = regmap_field_read(data->reg_als_prst, &prst);
if (ret < 0)
return ret;
ret = ltr501_als_read_samp_period(data, &samp_period);
if (ret < 0)
return ret;
*val2 = samp_period * prst;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_PROXIMITY:
ret = regmap_field_read(data->reg_ps_prst, &prst);
if (ret < 0)
return ret;
ret = ltr501_ps_read_samp_period(data, &samp_period);
if (ret < 0)
return ret;
*val2 = samp_period * prst;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
return -EINVAL;
}
static int ltr501_ps_read_samp_period(struct ltr501_data *data, int *val)
{
int ret, i;
ret = regmap_field_read(data->reg_ps_rate, &i);
if (ret < 0)
return ret;
if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table))
return -EINVAL;
*val = ltr501_ps_samp_table[i].time_val;
return IIO_VAL_INT;
}
static int da9063_get_current_limit(struct regulator_dev *rdev)
{
struct da9063_regulator *regl = rdev_get_drvdata(rdev);
const struct da9063_regulator_info *rinfo = regl->info;
unsigned int sel;
int ret;
ret = regmap_field_read(regl->ilimit, &sel);
if (ret < 0)
return ret;
if (sel >= rinfo->n_current_limits)
sel = rinfo->n_current_limits - 1;
return rinfo->current_limits[sel];
}
/* read int time in micro seconds */
static int ltr501_read_it_time(struct ltr501_data *data, int *val, int *val2)
{
int ret, index;
ret = regmap_field_read(data->reg_it, &index);
if (ret < 0)
return ret;
/* Make sure integ time index is valid */
if (index < 0 || index >= ARRAY_SIZE(int_time_mapping))
return -EINVAL;
*val2 = int_time_mapping[index];
*val = 0;
return IIO_VAL_INT_PLUS_MICRO;
}
static int ltr501_ps_read_samp_freq(struct ltr501_data *data,
int *val, int *val2)
{
int ret, i;
ret = regmap_field_read(data->reg_ps_rate, &i);
if (ret < 0)
return ret;
if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table))
return -EINVAL;
*val = ltr501_ps_samp_table[i].freq_val / 1000000;
*val2 = ltr501_ps_samp_table[i].freq_val % 1000000;
return IIO_VAL_INT_PLUS_MICRO;
}
static int syscfg_reset_program_hw(struct reset_controller_dev *rcdev,
unsigned long idx, int assert)
{
struct syscfg_reset_controller *rst = to_syscfg_reset_controller(rcdev);
const struct syscfg_reset_channel *ch;
u32 ctrl_val = rst->active_low ? !assert : !!assert;
int err;
if (idx >= rcdev->nr_resets)
return -EINVAL;
ch = &rst->channels[idx];
err = regmap_field_write(ch->reset, ctrl_val);
if (err)
return err;
if (ch->ack) {
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
u32 ack_val;
while (true) {
err = regmap_field_read(ch->ack, &ack_val);
if (err)
return err;
if (ack_val == ctrl_val)
break;
if (time_after(jiffies, timeout))
return -ETIME;
cpu_relax();
}
}
return 0;
}