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Message-ID: <20230508070925.2123265-4-astrid.rost@axis.com>
Date: Mon, 8 May 2023 09:09:21 +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 3/7] iio: light: vcnl4000: Add als_it for vcnl4040/4200
Add illumination integration time for vcnl4040 and vcnl4200.
Add read/write attribute for illumination integration time and read
attribute for available integration times.
Signed-off-by: Astrid Rost <astrid.rost@...s.com>
---
drivers/iio/light/vcnl4000.c | 140 ++++++++++++++++++++++++++++++++---
1 file changed, 129 insertions(+), 11 deletions(-)
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index e14475070ac3..65b42da9ffa8 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -80,6 +80,7 @@
#define VCNL4000_SELF_TIMED_EN BIT(0) /* start self-timed measurement */
#define VCNL4040_ALS_CONF_ALS_SHUTDOWN BIT(0)
+#define VCNL4040_ALS_CONF_IT GENMASK(7, 6) /* Ambient integration time */
#define VCNL4040_PS_CONF1_PS_SHUTDOWN BIT(0)
#define VCNL4040_PS_CONF2_PS_IT GENMASK(3, 1) /* Proximity integration time */
#define VCNL4040_PS_CONF2_PS_INT GENMASK(9, 8) /* Proximity interrupt mode */
@@ -133,6 +134,20 @@ static const int vcnl4200_ps_it_times[][2] = {
{0, 864},
};
+static const int vcnl4040_als_it_times[][2] = {
+ {0, 80000},
+ {0, 160000},
+ {0, 320000},
+ {0, 640000},
+};
+
+static const int vcnl4200_als_it_times[][2] = {
+ {0, 50000},
+ {0, 100000},
+ {0, 200000},
+ {0, 400000},
+};
+
#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
enum vcnl4000_device_ids {
@@ -506,6 +521,80 @@ static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on)
return ret;
}
+static int vcnl4040_read_als_it(struct vcnl4000_data *data, int *val, int *val2)
+{
+ int ret;
+ const int(*als_it_times)[][2];
+ int size;
+
+ if (data->id == VCNL4200) {
+ als_it_times = &vcnl4200_als_it_times;
+ size = ARRAY_SIZE(vcnl4200_als_it_times);
+ } else {
+ als_it_times = &vcnl4040_als_it_times;
+ size = ARRAY_SIZE(vcnl4040_als_it_times);
+ }
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF);
+ if (ret < 0)
+ return ret;
+
+ ret = FIELD_GET(VCNL4040_ALS_CONF_IT, ret);
+
+ if (ret >= size)
+ return -EINVAL;
+
+ *val = (*als_it_times)[ret][0];
+ *val2 = (*als_it_times)[ret][1];
+
+ return 0;
+}
+
+static ssize_t vcnl4040_write_als_it(struct vcnl4000_data *data, int val)
+{
+ unsigned int i;
+ int ret, index = -1;
+ u16 regval;
+ const int(*als_it_times)[][2];
+ int size;
+
+ if (data->id == VCNL4200) {
+ als_it_times = &vcnl4200_als_it_times;
+ size = ARRAY_SIZE(vcnl4200_als_it_times);
+ } else {
+ als_it_times = &vcnl4040_als_it_times;
+ size = ARRAY_SIZE(vcnl4040_als_it_times);
+ }
+
+ for (i = 0; i < size; i++) {
+ if (val == (*als_it_times)[i][1]) {
+ index = i;
+ break;
+ }
+ }
+
+ if (index < 0)
+ return -EINVAL;
+
+ data->vcnl4200_al.sampling_rate = ktime_set(0, val * 1200000);
+ data->al_scale = 12000000000 / val;
+
+ 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_IT) |
+ FIELD_PREP(VCNL4040_ALS_CONF_IT, index);
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF,
+ regval);
+
+out:
+ mutex_unlock(&data->vcnl4000_lock);
+ return ret;
+}
+
static int vcnl4040_read_ps_it(struct vcnl4000_data *data, int *val, int *val2)
{
int ret;
@@ -616,9 +705,16 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev,
*val2 = data->al_scale;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_INT_TIME:
- if (chan->type != IIO_PROXIMITY)
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = vcnl4040_read_als_it(data, val, val2);
+ break;
+ case IIO_PROXIMITY:
+ ret = vcnl4040_read_ps_it(data, val, val2);
+ break;
+ default:
return -EINVAL;
- ret = vcnl4040_read_ps_it(data, val, val2);
+ }
if (ret < 0)
return ret;
return IIO_VAL_INT_PLUS_MICRO;
@@ -637,9 +733,14 @@ static int vcnl4040_write_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_INT_TIME:
if (val != 0)
return -EINVAL;
- if (chan->type != IIO_PROXIMITY)
+ switch (chan->type) {
+ case IIO_LIGHT:
+ return vcnl4040_write_als_it(data, val2);
+ case IIO_PROXIMITY:
+ return vcnl4040_write_ps_it(data, val2);
+ default:
return -EINVAL;
- return vcnl4040_write_ps_it(data, val2);
+ }
default:
return -EINVAL;
}
@@ -654,12 +755,27 @@ static int vcnl4040_read_avail(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_INT_TIME:
- if (data->id == VCNL4200) {
- *vals = (int *)vcnl4200_ps_it_times;
- *length = 2 * ARRAY_SIZE(vcnl4200_ps_it_times);
- } else {
- *vals = (int *)vcnl4040_ps_it_times;
- *length = 2 * ARRAY_SIZE(vcnl4040_ps_it_times);
+ switch (chan->type) {
+ case IIO_LIGHT:
+ if (data->id == VCNL4200) {
+ *vals = (int *)vcnl4200_als_it_times;
+ *length = 2 * ARRAY_SIZE(vcnl4200_als_it_times);
+ } else {
+ *vals = (int *)vcnl4040_als_it_times;
+ *length = 2 * ARRAY_SIZE(vcnl4040_als_it_times);
+ }
+ break;
+ case IIO_PROXIMITY:
+ if (data->id == VCNL4200) {
+ *vals = (int *)vcnl4200_ps_it_times;
+ *length = 2 * ARRAY_SIZE(vcnl4200_ps_it_times);
+ } else {
+ *vals = (int *)vcnl4040_ps_it_times;
+ *length = 2 * ARRAY_SIZE(vcnl4040_ps_it_times);
+ }
+ break;
+ default:
+ return -EINVAL;
}
*type = IIO_VAL_INT_PLUS_MICRO;
return IIO_AVAIL_LIST;
@@ -1289,7 +1405,9 @@ 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_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME),
}, {
.type = IIO_PROXIMITY,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
--
2.30.2
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