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Date: Mon, 8 May 2023 09:09:23 +0200
From: Astrid Rost <astrid.rost@...s.com>
To: Jonathan Cameron <jic23@...nel.org>
CC: <kernel@...s.com>, Astrid Rost <astridr@...s.com>,
Astrid Rost <astrid.rost@...s.com>,
Lars-Peter Clausen <lars@...afoo.de>,
<linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 5/7] iio: light: vcnl4000: Add debounce count for vcnl4040/4200
Add read/write attribute for proximity and illumination debounce-count
and read attribute for available debounce-counts.
The debounce-count is set in the interrupt persistence flags
(PS_PERS and ALS_PERS). An interrupt will not be asserted if the raw
value is not over (or lower) than the threshold for the set
continued refresh times.
This is supported for vcnl4040 vcnl4200.
Signed-off-by: Astrid Rost <astrid.rost@...s.com>
---
drivers/iio/light/vcnl4000.c | 156 ++++++++++++++++++++++++++++++++++-
1 file changed, 152 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index ae06a697fbff..5c6359d1e0ba 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -84,8 +84,10 @@
#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 */
@@ -153,6 +155,9 @@ static const int vcnl4200_als_it_times[][2] = {
{0, 400000},
};
+static const int vcnl4040_als_debounce_count[] = {1, 2, 4, 8};
+static const int vcnl4040_ps_debounce_count[] = {1, 2, 3, 4};
+
#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
enum vcnl4000_device_ids {
@@ -675,6 +680,106 @@ static ssize_t vcnl4040_write_ps_it(struct vcnl4000_data *data, int val)
return ret;
}
+static ssize_t vcnl4040_read_als_debounce_count(struct vcnl4000_data *data, int *val)
+{
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF);
+ if (ret < 0)
+ return ret;
+
+ ret = FIELD_GET(VCNL4040_ALS_CONF_PERS, ret);
+
+ if (ret >= ARRAY_SIZE(vcnl4200_als_it_times))
+ return -EINVAL;
+
+ *val = vcnl4040_als_debounce_count[ret];
+
+ return ret;
+}
+
+static ssize_t vcnl4040_write_als_debounce_count(struct vcnl4000_data *data, int val)
+{
+ unsigned int i;
+ int ret, index = -1;
+ u16 regval;
+
+ for (i = 0; i < ARRAY_SIZE(vcnl4040_als_debounce_count); i++) {
+ if (val == vcnl4040_als_debounce_count[i]) {
+ index = i;
+ break;
+ }
+ }
+
+ if (index < 0)
+ return -EINVAL;
+
+ mutex_lock(&data->vcnl4000_lock);
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF);
+ if (ret < 0)
+ goto out;
+
+ regval = (ret & ~VCNL4040_ALS_CONF_PERS) |
+ FIELD_PREP(VCNL4040_ALS_CONF_PERS, index);
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF,
+ regval);
+
+out:
+ mutex_unlock(&data->vcnl4000_lock);
+ return ret;
+}
+
+static ssize_t vcnl4040_read_ps_debounce_count(struct vcnl4000_data *data, int *val)
+{
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1);
+ if (ret < 0)
+ return ret;
+
+ ret = FIELD_GET(VCNL4040_CONF1_PS_PERS, ret);
+
+ if (ret >= ARRAY_SIZE(vcnl4200_ps_it_times))
+ return -EINVAL;
+
+ *val = vcnl4040_ps_debounce_count[ret];
+
+ return ret;
+}
+
+static ssize_t vcnl4040_write_ps_debounce_count(struct vcnl4000_data *data, int val)
+{
+ unsigned int i;
+ int ret, index = -1;
+ u16 regval;
+
+ for (i = 0; i < ARRAY_SIZE(vcnl4040_ps_debounce_count); i++) {
+ if (val == vcnl4040_ps_debounce_count[i]) {
+ 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;
+
+ regval = (ret & ~VCNL4040_CONF1_PS_PERS) |
+ FIELD_PREP(VCNL4040_CONF1_PS_PERS, index);
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1,
+ regval);
+
+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)
@@ -725,6 +830,21 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = vcnl4040_read_als_debounce_count(data, val);
+ break;
+ case IIO_PROXIMITY:
+ ret = vcnl4040_read_ps_debounce_count(data, val);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+
default:
return -EINVAL;
}
@@ -748,6 +868,15 @@ static int vcnl4040_write_raw(struct iio_dev *indio_dev,
default:
return -EINVAL;
}
+ case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ return vcnl4040_write_als_debounce_count(data, val);
+ case IIO_PROXIMITY:
+ return vcnl4040_write_ps_debounce_count(data, val);
+ default:
+ return -EINVAL;
+ }
default:
return -EINVAL;
}
@@ -786,6 +915,21 @@ static int vcnl4040_read_avail(struct iio_dev *indio_dev,
}
*type = IIO_VAL_INT_PLUS_MICRO;
return IIO_AVAIL_LIST;
+ case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ *vals = (int *)vcnl4040_als_debounce_count;
+ *length = ARRAY_SIZE(vcnl4040_als_debounce_count);
+ break;
+ case IIO_PROXIMITY:
+ *vals = (int *)vcnl4040_ps_debounce_count;
+ *length = ARRAY_SIZE(vcnl4040_ps_debounce_count);
+ break;
+ default:
+ return -EINVAL;
+ }
+ *type = IIO_VAL_INT;
+ return IIO_AVAIL_LIST;
default:
return -EINVAL;
}
@@ -1499,15 +1643,19 @@ static const struct iio_chan_spec vcnl4040_channels[] = {
.type = IIO_LIGHT,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
- BIT(IIO_CHAN_INFO_INT_TIME),
- .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME),
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT),
.event_spec = vcnl4000_event_spec,
.num_event_specs = ARRAY_SIZE(vcnl4000_event_spec),
}, {
.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),
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT),
.ext_info = vcnl4000_ext_info,
.event_spec = vcnl4040_event_spec,
.num_event_specs = ARRAY_SIZE(vcnl4040_event_spec),
--
2.30.2
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