#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
+#include <linux/units.h>
#include <linux/iio/buffer.h>
#include <linux/iio/events.h>
#define VCNL4040_ALS_CONF_ALS_SHUTDOWN BIT(0)
#define VCNL4040_ALS_CONF_IT GENMASK(7, 6) /* Ambient integration time */
#define VCNL4040_ALS_CONF_INT_EN BIT(1) /* Ambient light Interrupt enable */
+#define VCNL4040_ALS_CONF_PERS GENMASK(3, 2) /* Ambient interrupt persistence setting */
#define VCNL4040_PS_CONF1_PS_SHUTDOWN BIT(0)
#define VCNL4040_PS_CONF2_PS_IT GENMASK(3, 1) /* Proximity integration time */
+#define VCNL4040_CONF1_PS_PERS GENMASK(5, 4) /* Proximity interrupt persistence setting */
#define VCNL4040_PS_CONF2_PS_INT GENMASK(9, 8) /* Proximity interrupt mode */
#define VCNL4040_PS_IF_AWAY BIT(8) /* Proximity event cross low threshold */
#define VCNL4040_PS_IF_CLOSE BIT(9) /* Proximity event cross high threshold */
{0, 400000},
};
+static const int vcnl4040_als_persistence[] = {1, 2, 4, 8};
+static const int vcnl4040_ps_persistence[] = {1, 2, 3, 4};
+
#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
enum vcnl4000_device_ids {
return ret;
}
+static ssize_t vcnl4040_read_als_period(struct vcnl4000_data *data, int *val, int *val2)
+{
+ int ret, ret_pers, it;
+ int64_t val_c;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF);
+ if (ret < 0)
+ return ret;
+
+ ret_pers = FIELD_GET(VCNL4040_ALS_CONF_PERS, ret);
+ if (ret_pers >= ARRAY_SIZE(vcnl4040_als_persistence))
+ return -EINVAL;
+
+ it = FIELD_GET(VCNL4040_ALS_CONF_IT, ret);
+ if (it >= data->chip_spec->num_als_it_times)
+ return -EINVAL;
+
+ val_c = mul_u32_u32((*data->chip_spec->als_it_times)[it][1],
+ vcnl4040_als_persistence[ret_pers]);
+ *val = div_u64_rem(val_c, MICRO, val2);
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static ssize_t vcnl4040_write_als_period(struct vcnl4000_data *data, int val, int val2)
+{
+ unsigned int i;
+ int ret, it;
+ u16 regval;
+ u64 val_n = mul_u32_u32(val, MICRO) + val2;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF);
+ if (ret < 0)
+ return ret;
+
+ it = FIELD_GET(VCNL4040_ALS_CONF_IT, ret);
+ if (it >= data->chip_spec->num_als_it_times)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(vcnl4040_als_persistence) - 1; i++) {
+ if (val_n < mul_u32_u32(vcnl4040_als_persistence[i],
+ (*data->chip_spec->als_it_times)[it][1]))
+ break;
+ }
+
+ mutex_lock(&data->vcnl4000_lock);
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF);
+ if (ret < 0)
+ goto out_unlock;
+
+ regval = FIELD_PREP(VCNL4040_ALS_CONF_PERS, i);
+ regval |= (ret & ~VCNL4040_ALS_CONF_PERS);
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF,
+ regval);
+
+out_unlock:
+ mutex_unlock(&data->vcnl4000_lock);
+ return ret;
+}
+
+static ssize_t vcnl4040_read_ps_period(struct vcnl4000_data *data, int *val, int *val2)
+{
+ int ret, ret_pers, it;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1);
+ if (ret < 0)
+ return ret;
+
+ ret_pers = FIELD_GET(VCNL4040_CONF1_PS_PERS, ret);
+ if (ret_pers >= ARRAY_SIZE(vcnl4040_ps_persistence))
+ return -EINVAL;
+
+ it = FIELD_GET(VCNL4040_PS_CONF2_PS_IT, ret);
+ if (it >= data->chip_spec->num_ps_it_times)
+ return -EINVAL;
+
+ *val = (*data->chip_spec->ps_it_times)[it][0];
+ *val2 = (*data->chip_spec->ps_it_times)[it][1] *
+ vcnl4040_ps_persistence[ret_pers];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static ssize_t vcnl4040_write_ps_period(struct vcnl4000_data *data, int val, int val2)
+{
+ int ret, it, i;
+ u16 regval;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1);
+ if (ret < 0)
+ return ret;
+
+ it = FIELD_GET(VCNL4040_PS_CONF2_PS_IT, ret);
+ if (it >= data->chip_spec->num_ps_it_times)
+ return -EINVAL;
+
+ if (val > 0)
+ i = ARRAY_SIZE(vcnl4040_ps_persistence) - 1;
+ else {
+ for (i = 0; i < ARRAY_SIZE(vcnl4040_ps_persistence) - 1; i++) {
+ if (val2 <= vcnl4040_ps_persistence[i] *
+ (*data->chip_spec->ps_it_times)[it][1])
+ break;
+ }
+ }
+
+ mutex_lock(&data->vcnl4000_lock);
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1);
+ if (ret < 0)
+ goto out_unlock;
+
+ regval = FIELD_PREP(VCNL4040_CONF1_PS_PERS, i);
+ regval |= (ret & ~VCNL4040_CONF1_PS_PERS);
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1,
+ regval);
+
+out_unlock:
+ 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)
switch (chan->type) {
case IIO_LIGHT:
switch (info) {
+ case IIO_EV_INFO_PERIOD:
+ return vcnl4040_read_als_period(data, val, val2);
case IIO_EV_INFO_VALUE:
switch (dir) {
case IIO_EV_DIR_RISING:
break;
case IIO_PROXIMITY:
switch (info) {
+ case IIO_EV_INFO_PERIOD:
+ return vcnl4040_read_ps_period(data, val, val2);
case IIO_EV_INFO_VALUE:
switch (dir) {
case IIO_EV_DIR_RISING:
switch (chan->type) {
case IIO_LIGHT:
switch (info) {
+ case IIO_EV_INFO_PERIOD:
+ return vcnl4040_write_als_period(data, val, val2);
case IIO_EV_INFO_VALUE:
switch (dir) {
case IIO_EV_DIR_RISING:
break;
case IIO_PROXIMITY:
switch (info) {
+ case IIO_EV_INFO_PERIOD:
+ return vcnl4040_write_ps_period(data, val, val2);
case IIO_EV_INFO_VALUE:
switch (dir) {
case IIO_EV_DIR_RISING:
}
};
+static const struct iio_event_spec vcnl4040_als_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_PERIOD),
+ },
+};
+
static const struct iio_event_spec vcnl4040_event_spec[] = {
{
.type = IIO_EV_TYPE_THRESH,
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_FALLING,
.mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_PERIOD),
},
};
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_INT_TIME),
.info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME),
- .event_spec = vcnl4000_event_spec,
- .num_event_specs = ARRAY_SIZE(vcnl4000_event_spec),
+ .event_spec = vcnl4040_als_event_spec,
+ .num_event_specs = ARRAY_SIZE(vcnl4040_als_event_spec),
}, {
.type = IIO_PROXIMITY,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |