Add read/write attribute for proximity integration time, and read
attribute for available proximity integration times for the vcnl4040
chip.
Signed-off-by: Mårten Lindahl <marten.lindahl@xxxxxxxx>
---
drivers/iio/light/vcnl4000.c | 129 ++++++++++++++++++++++++++++++++++-
1 file changed, 126 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index b2ecf8af1aa5..056079b592c6 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -17,6 +17,7 @@
* interrupts (VCNL4040, VCNL4200)
*/
+#include <linux/bitfield.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/err.h>
@@ -76,6 +77,7 @@
#define VCNL4040_ALS_CONF_ALS_SD BIT(0) /* Enable ambient light sensor */
#define VCNL4040_PS_CONF1_PS_SD BIT(0) /* Enable proximity sensor */
+#define VCNL4040_PS_CONF2_PS_IT GENMASK(3, 1) /* Proximity integration time */
/* Bit masks for interrupt registers. */
#define VCNL4010_INT_THR_SEL BIT(0) /* Select threshold interrupt source */
@@ -104,6 +106,17 @@ static const int vcnl4010_prox_sampling_frequency[][2] = {
{250, 0},
};
+static const int vcnl4040_ps_it_times[][2] = {
+ {0, 100},
+ {0, 150},
+ {0, 200},
+ {0, 250},
+ {0, 300},
+ {0, 350},
+ {0, 400},
+ {0, 800},
+};
+
#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
enum vcnl4000_device_ids {
@@ -470,6 +483,55 @@ static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on)
return ret;
}
+static int vcnl4040_read_ps_it(struct vcnl4000_data *data, int *val, int *val2)
+{
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1);
+ if (ret < 0)
+ return ret;
+
+ ret = FIELD_GET(VCNL4040_PS_CONF2_PS_IT, ret);
+
+ if (ret >= ARRAY_SIZE(vcnl4040_ps_it_times))
+ return -EINVAL;
+
+ *val = vcnl4040_ps_it_times[ret][0];
+ *val2 = vcnl4040_ps_it_times[ret][1];
+
+ return 0;
+}
+
+static ssize_t vcnl4040_write_ps_it(struct vcnl4000_data *data, int val)
+{
+ unsigned int i;
+ int ret, index = -1;
+
+ for (i = 0; i < ARRAY_SIZE(vcnl4040_ps_it_times); i++) {
+ if (val == vcnl4040_ps_it_times[i][1]) {
+ index = i;
+ break;
+ }
+ }
+
+ if (index < 0)
+ return -EINVAL;
+
+ mutex_lock(&data->vcnl4000_lock);
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1);
+ if (ret < 0)
+ goto out;
+
+ ret = (ret & ~VCNL4040_PS_CONF2_PS_IT) |
+ FIELD_PREP(VCNL4040_PS_CONF2_PS_IT, index);
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, ret);
+
+out:
+ mutex_unlock(&data->vcnl4000_lock);
+ return ret;
+}
+
static int vcnl4000_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
@@ -506,6 +568,47 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev,
*val = 0;
*val2 = data->al_scale;
return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+ ret = vcnl4040_read_ps_it(data, val, val2);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4040_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+ if (chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+ return vcnl4040_write_ps_it(data, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4040_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ *vals = (int *)vcnl4040_ps_it_times;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ *length = 2 * ARRAY_SIZE(vcnl4040_ps_it_times);
+ return IIO_AVAIL_LIST;
default:
return -EINVAL;
}
@@ -844,6 +947,20 @@ static const struct iio_chan_spec vcnl4010_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(1),
};
+static const struct iio_chan_spec vcnl4040_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }, {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME),
+ .ext_info = vcnl4000_ext_info,
+ }
+};
+
static const struct iio_info vcnl4000_info = {
.read_raw = vcnl4000_read_raw,
};
@@ -858,6 +975,12 @@ static const struct iio_info vcnl4010_info = {
.write_event_config = vcnl4010_write_event_config,
};
+static const struct iio_info vcnl4040_info = {
+ .read_raw = vcnl4000_read_raw,
+ .write_raw = vcnl4040_write_raw,
+ .read_avail = vcnl4040_read_avail,
+};
+
static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
[VCNL4000] = {
.prod = "VCNL4000",
@@ -887,9 +1010,9 @@ static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
.measure_light = vcnl4200_measure_light,
.measure_proximity = vcnl4200_measure_proximity,
.set_power_state = vcnl4200_set_power_state,
- .channels = vcnl4000_channels,
- .num_channels = ARRAY_SIZE(vcnl4000_channels),
- .info = &vcnl4000_info,
+ .channels = vcnl4040_channels,
+ .num_channels = ARRAY_SIZE(vcnl4040_channels),
+ .info = &vcnl4040_info,
.irq_support = false,
},
[VCNL4200] = {
--
2.30.2
