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iio: sx9310: Support setting debounce values

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The rising and falling directions can be debounced in the hardware as
"close" and "far" debounce settings. Add support for these as rising and
falling debounce settings.

Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Cc: Daniel Campello <campello@chromium.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Gwendal Grignou <gwendal@chromium.org>
Cc: Evan Green <evgreen@chromium.org>
Link: https://lore.kernel.org/r/20201007011735.1346994-5-swboyd@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Stephen Boyd 2020-10-06 18:17:33 -07:00 committed by Jonathan Cameron
parent 08f0411c48
commit 1b6872015f
1 changed files with 100 additions and 0 deletions
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100
drivers/iio/proximity/sx9310.c
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@ -77,6 +77,8 @@
#define SX9310_REG_PROX_CTRL10 0x1a
#define SX9310_REG_PROX_CTRL10_HYST_MASK GENMASK(5, 4)
#define SX9310_REG_PROX_CTRL10_HYST_6PCT (0x01 << 4)
#define SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK GENMASK(3, 2)
#define SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK GENMASK(1, 0)
#define SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_2 0x01
#define SX9310_REG_PROX_CTRL11 0x1b
#define SX9310_REG_PROX_CTRL12 0x1c
@ -147,6 +149,16 @@ struct sx9310_data {
};
static const struct iio_event_spec sx9310_events[] = {
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_RISING,
.mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD),
},
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_FALLING,
.mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD),
},
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_EITHER,
@ -601,6 +613,42 @@ static int sx9310_read_hysteresis(struct sx9310_data *data,
return IIO_VAL_INT;
}
static int sx9310_read_far_debounce(struct sx9310_data *data, int *val)
{
unsigned int regval;
int ret;
ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, &regval);
if (ret)
return ret;
regval = FIELD_GET(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, regval);
if (regval)
*val = 1 << regval;
else
*val = 0;
return IIO_VAL_INT;
}
static int sx9310_read_close_debounce(struct sx9310_data *data, int *val)
{
unsigned int regval;
int ret;
ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, &regval);
if (ret)
return ret;
regval = FIELD_GET(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, regval);
if (regval)
*val = 1 << regval;
else
*val = 0;
return IIO_VAL_INT;
}
static int sx9310_read_event_val(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
@ -615,6 +663,15 @@ static int sx9310_read_event_val(struct iio_dev *indio_dev,
switch (info) {
case IIO_EV_INFO_VALUE:
return sx9310_read_thresh(data, chan, val);
case IIO_EV_INFO_PERIOD:
switch (dir) {
case IIO_EV_DIR_RISING:
return sx9310_read_far_debounce(data, val);
case IIO_EV_DIR_FALLING:
return sx9310_read_close_debounce(data, val);
default:
return -EINVAL;
}
case IIO_EV_INFO_HYSTERESIS:
return sx9310_read_hysteresis(data, chan, val);
default:
@ -682,6 +739,40 @@ static int sx9310_write_hysteresis(struct sx9310_data *data,
return ret;
}
static int sx9310_write_far_debounce(struct sx9310_data *data, int val)
{
int ret;
unsigned int regval;
val = ilog2(val);
regval = FIELD_PREP(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, val);
mutex_lock(&data->mutex);
ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10,
SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK,
regval);
mutex_unlock(&data->mutex);
return ret;
}
static int sx9310_write_close_debounce(struct sx9310_data *data, int val)
{
int ret;
unsigned int regval;
val = ilog2(val);
regval = FIELD_PREP(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, val);
mutex_lock(&data->mutex);
ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10,
SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK,
regval);
mutex_unlock(&data->mutex);
return ret;
}
static int sx9310_write_event_val(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
@ -696,6 +787,15 @@ static int sx9310_write_event_val(struct iio_dev *indio_dev,
switch (info) {
case IIO_EV_INFO_VALUE:
return sx9310_write_thresh(data, chan, val);
case IIO_EV_INFO_PERIOD:
switch (dir) {
case IIO_EV_DIR_RISING:
return sx9310_write_far_debounce(data, val);
case IIO_EV_DIR_FALLING:
return sx9310_write_close_debounce(data, val);
default:
return -EINVAL;
}
case IIO_EV_INFO_HYSTERESIS:
return sx9310_write_hysteresis(data, chan, val);
default: