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Diffstat (limited to 'drivers/iio/light/ltr501.c')
-rw-r--r--drivers/iio/light/ltr501.c185
1 files changed, 134 insertions, 51 deletions
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
index 71f99d2a22c1..74a1ccda8b9c 100644
--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor
+ * Support for Lite-On LTR501 and similar ambient light and proximity sensors.
*
* Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
*
@@ -15,6 +15,7 @@
#include <linux/delay.h>
#include <linux/regmap.h>
#include <linux/acpi.h>
+#include <linux/regulator/consumer.h>
#include <linux/iio/iio.h>
#include <linux/iio/events.h>
@@ -32,9 +33,12 @@
#define LTR501_PART_ID 0x86
#define LTR501_MANUFAC_ID 0x87
#define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */
+#define LTR501_ALS_DATA1_UPPER 0x89 /* upper 8 bits of LTR501_ALS_DATA1 */
#define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */
+#define LTR501_ALS_DATA0_UPPER 0x8b /* upper 8 bits of LTR501_ALS_DATA0 */
#define LTR501_ALS_PS_STATUS 0x8c
#define LTR501_PS_DATA 0x8d /* 16-bit, little endian */
+#define LTR501_PS_DATA_UPPER 0x8e /* upper 8 bits of LTR501_PS_DATA */
#define LTR501_INTR 0x8f /* output mode, polarity, mode */
#define LTR501_PS_THRESH_UP 0x90 /* 11 bit, ps upper threshold */
#define LTR501_PS_THRESH_LOW 0x92 /* 11 bit, ps lower threshold */
@@ -94,6 +98,7 @@ enum {
ltr501 = 0,
ltr559,
ltr301,
+ ltr303,
};
struct ltr501_gain {
@@ -101,12 +106,12 @@ struct ltr501_gain {
int uscale;
};
-static struct ltr501_gain ltr501_als_gain_tbl[] = {
+static const struct ltr501_gain ltr501_als_gain_tbl[] = {
{1, 0},
{0, 5000},
};
-static struct ltr501_gain ltr559_als_gain_tbl[] = {
+static const struct ltr501_gain ltr559_als_gain_tbl[] = {
{1, 0},
{0, 500000},
{0, 250000},
@@ -117,14 +122,14 @@ static struct ltr501_gain ltr559_als_gain_tbl[] = {
{0, 10000},
};
-static struct ltr501_gain ltr501_ps_gain_tbl[] = {
+static const struct ltr501_gain ltr501_ps_gain_tbl[] = {
{1, 0},
{0, 250000},
{0, 125000},
{0, 62500},
};
-static struct ltr501_gain ltr559_ps_gain_tbl[] = {
+static const struct ltr501_gain ltr559_ps_gain_tbl[] = {
{0, 62500}, /* x16 gain */
{0, 31250}, /* x32 gain */
{0, 15625}, /* bits X1 are for x64 gain */
@@ -133,9 +138,9 @@ static struct ltr501_gain ltr559_ps_gain_tbl[] = {
struct ltr501_chip_info {
u8 partid;
- struct ltr501_gain *als_gain;
+ const struct ltr501_gain *als_gain;
int als_gain_tbl_size;
- struct ltr501_gain *ps_gain;
+ const struct ltr501_gain *ps_gain;
int ps_gain_tbl_size;
u8 als_mode_active;
u8 als_gain_mask;
@@ -148,8 +153,9 @@ struct ltr501_chip_info {
struct ltr501_data {
struct i2c_client *client;
+ struct regulator_bulk_data regulators[2];
struct mutex lock_als, lock_ps;
- struct ltr501_chip_info *chip_info;
+ const struct ltr501_chip_info *chip_info;
u8 als_contr, ps_contr;
int als_period, ps_period; /* period in micro seconds */
struct regmap *regmap;
@@ -160,6 +166,7 @@ struct ltr501_data {
struct regmap_field *reg_ps_rate;
struct regmap_field *reg_als_prst;
struct regmap_field *reg_ps_prst;
+ uint32_t near_level;
};
static const struct ltr501_samp_table ltr501_als_samp_table[] = {
@@ -192,7 +199,7 @@ static int ltr501_match_samp_freq(const struct ltr501_samp_table *tab,
return -EINVAL;
}
-static int ltr501_als_read_samp_freq(struct ltr501_data *data,
+static int ltr501_als_read_samp_freq(const struct ltr501_data *data,
int *val, int *val2)
{
int ret, i;
@@ -210,7 +217,7 @@ static int ltr501_als_read_samp_freq(struct ltr501_data *data,
return IIO_VAL_INT_PLUS_MICRO;
}
-static int ltr501_ps_read_samp_freq(struct ltr501_data *data,
+static int ltr501_ps_read_samp_freq(const struct ltr501_data *data,
int *val, int *val2)
{
int ret, i;
@@ -266,7 +273,7 @@ static int ltr501_ps_write_samp_freq(struct ltr501_data *data,
return ret;
}
-static int ltr501_als_read_samp_period(struct ltr501_data *data, int *val)
+static int ltr501_als_read_samp_period(const struct ltr501_data *data, int *val)
{
int ret, i;
@@ -282,7 +289,7 @@ static int ltr501_als_read_samp_period(struct ltr501_data *data, int *val)
return IIO_VAL_INT;
}
-static int ltr501_ps_read_samp_period(struct ltr501_data *data, int *val)
+static int ltr501_ps_read_samp_period(const struct ltr501_data *data, int *val)
{
int ret, i;
@@ -321,7 +328,7 @@ static unsigned long ltr501_calculate_lux(u16 vis_data, u16 ir_data)
return lux / 1000;
}
-static int ltr501_drdy(struct ltr501_data *data, u8 drdy_mask)
+static int ltr501_drdy(const struct ltr501_data *data, u8 drdy_mask)
{
int tries = 100;
int ret, status;
@@ -373,7 +380,8 @@ static int ltr501_set_it_time(struct ltr501_data *data, int it)
}
/* read int time in micro seconds */
-static int ltr501_read_it_time(struct ltr501_data *data, int *val, int *val2)
+static int ltr501_read_it_time(const struct ltr501_data *data,
+ int *val, int *val2)
{
int ret, index;
@@ -391,7 +399,7 @@ static int ltr501_read_it_time(struct ltr501_data *data, int *val, int *val2)
return IIO_VAL_INT_PLUS_MICRO;
}
-static int ltr501_read_als(struct ltr501_data *data, __le16 buf[2])
+static int ltr501_read_als(const struct ltr501_data *data, __le16 buf[2])
{
int ret;
@@ -403,23 +411,24 @@ static int ltr501_read_als(struct ltr501_data *data, __le16 buf[2])
buf, 2 * sizeof(__le16));
}
-static int ltr501_read_ps(struct ltr501_data *data)
+static int ltr501_read_ps(const struct ltr501_data *data)
{
- int ret, status;
+ __le16 status;
+ int ret;
ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY);
if (ret < 0)
return ret;
ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA,
- &status, 2);
+ &status, sizeof(status));
if (ret < 0)
return ret;
- return status;
+ return le16_to_cpu(status);
}
-static int ltr501_read_intr_prst(struct ltr501_data *data,
+static int ltr501_read_intr_prst(const struct ltr501_data *data,
enum iio_chan_type type,
int *val2)
{
@@ -517,6 +526,25 @@ static int ltr501_write_intr_prst(struct ltr501_data *data,
return -EINVAL;
}
+static ssize_t ltr501_read_near_level(struct iio_dev *indio_dev,
+ uintptr_t priv,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+
+ return sprintf(buf, "%u\n", data->near_level);
+}
+
+static const struct iio_chan_spec_ext_info ltr501_ext_info[] = {
+ {
+ .name = "nearlevel",
+ .shared = IIO_SEPARATE,
+ .read = ltr501_read_near_level,
+ },
+ { /* sentinel */ }
+};
+
static const struct iio_event_spec ltr501_als_event_spec[] = {
{
.type = IIO_EV_TYPE_THRESH,
@@ -601,6 +629,7 @@ static const struct iio_chan_spec ltr501_channels[] = {
},
.event_spec = ltr501_pxs_event_spec,
.num_event_specs = ARRAY_SIZE(ltr501_pxs_event_spec),
+ .ext_info = ltr501_ext_info,
},
IIO_CHAN_SOFT_TIMESTAMP(3),
};
@@ -716,7 +745,7 @@ static int ltr501_read_raw(struct iio_dev *indio_dev,
return -EINVAL;
}
-static int ltr501_get_gain_index(struct ltr501_gain *gain, int size,
+static int ltr501_get_gain_index(const struct ltr501_gain *gain, int size,
int val, int val2)
{
int i;
@@ -734,7 +763,7 @@ static int ltr501_write_raw(struct iio_dev *indio_dev,
{
struct ltr501_data *data = iio_priv(indio_dev);
int i, ret, freq_val, freq_val2;
- struct ltr501_chip_info *info = data->chip_info;
+ const struct ltr501_chip_info *info = data->chip_info;
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
@@ -848,14 +877,14 @@ static int ltr501_write_raw(struct iio_dev *indio_dev,
return ret;
}
-static int ltr501_read_thresh(struct iio_dev *indio_dev,
+static int ltr501_read_thresh(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir,
enum iio_event_info info,
int *val, int *val2)
{
- struct ltr501_data *data = iio_priv(indio_dev);
+ const struct ltr501_data *data = iio_priv(indio_dev);
int ret, thresh_data;
switch (chan->type) {
@@ -1081,7 +1110,7 @@ static ssize_t ltr501_show_proximity_scale_avail(struct device *dev,
char *buf)
{
struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));
- struct ltr501_chip_info *info = data->chip_info;
+ const struct ltr501_chip_info *info = data->chip_info;
ssize_t len = 0;
int i;
@@ -1103,7 +1132,7 @@ static ssize_t ltr501_show_intensity_scale_avail(struct device *dev,
char *buf)
{
struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));
- struct ltr501_chip_info *info = data->chip_info;
+ const struct ltr501_chip_info *info = data->chip_info;
ssize_t len = 0;
int i;
@@ -1183,7 +1212,7 @@ static const struct iio_info ltr301_info = {
.write_event_config = &ltr501_write_event_config,
};
-static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
+static const struct ltr501_chip_info ltr501_chip_info_tbl[] = {
[ltr501] = {
.partid = 0x08,
.als_gain = ltr501_als_gain_tbl,
@@ -1204,7 +1233,7 @@ static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
.als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),
.ps_gain = ltr559_ps_gain_tbl,
.ps_gain_tbl_size = ARRAY_SIZE(ltr559_ps_gain_tbl),
- .als_mode_active = BIT(1),
+ .als_mode_active = BIT(0),
.als_gain_mask = BIT(2) | BIT(3) | BIT(4),
.als_gain_shift = 2,
.info = &ltr501_info,
@@ -1224,6 +1253,18 @@ static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
.channels = ltr301_channels,
.no_channels = ARRAY_SIZE(ltr301_channels),
},
+ [ltr303] = {
+ .partid = 0x0A,
+ .als_gain = ltr559_als_gain_tbl,
+ .als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),
+ .als_mode_active = BIT(0),
+ .als_gain_mask = BIT(2) | BIT(3) | BIT(4),
+ .als_gain_shift = 2,
+ .info = &ltr301_info,
+ .info_no_irq = &ltr301_info_no_irq,
+ .channels = ltr301_channels,
+ .no_channels = ARRAY_SIZE(ltr301_channels),
+ },
};
static int ltr501_write_contr(struct ltr501_data *data, u8 als_val, u8 ps_val)
@@ -1242,13 +1283,16 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct ltr501_data *data = iio_priv(indio_dev);
- u16 buf[8];
+ struct {
+ u16 channels[3];
+ s64 ts __aligned(8);
+ } scan;
__le16 als_buf[2];
u8 mask = 0;
int j = 0;
int ret, psdata;
- memset(buf, 0, sizeof(buf));
+ memset(&scan, 0, sizeof(scan));
/* figure out which data needs to be ready */
if (test_bit(0, indio_dev->active_scan_mask) ||
@@ -1263,13 +1307,13 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
if (mask & LTR501_STATUS_ALS_RDY) {
ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,
- (u8 *)als_buf, sizeof(als_buf));
+ als_buf, sizeof(als_buf));
if (ret < 0)
- return ret;
+ goto done;
if (test_bit(0, indio_dev->active_scan_mask))
- buf[j++] = le16_to_cpu(als_buf[1]);
+ scan.channels[j++] = le16_to_cpu(als_buf[1]);
if (test_bit(1, indio_dev->active_scan_mask))
- buf[j++] = le16_to_cpu(als_buf[0]);
+ scan.channels[j++] = le16_to_cpu(als_buf[0]);
}
if (mask & LTR501_STATUS_PS_RDY) {
@@ -1277,10 +1321,10 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
&psdata, 2);
if (ret < 0)
goto done;
- buf[j++] = psdata & LTR501_PS_DATA_MASK;
+ scan.channels[j++] = psdata & LTR501_PS_DATA_MASK;
}
- iio_push_to_buffers_with_timestamp(indio_dev, buf,
+ iio_push_to_buffers_with_timestamp(indio_dev, &scan,
iio_get_time_ns(indio_dev));
done:
@@ -1350,16 +1394,19 @@ static bool ltr501_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case LTR501_ALS_DATA1:
+ case LTR501_ALS_DATA1_UPPER:
case LTR501_ALS_DATA0:
+ case LTR501_ALS_DATA0_UPPER:
case LTR501_ALS_PS_STATUS:
case LTR501_PS_DATA:
+ case LTR501_PS_DATA_UPPER:
return true;
default:
return false;
}
}
-static struct regmap_config ltr501_regmap_config = {
+static const struct regmap_config ltr501_regmap_config = {
.name = LTR501_REGMAP_NAME,
.reg_bits = 8,
.val_bits = 8,
@@ -1368,6 +1415,13 @@ static struct regmap_config ltr501_regmap_config = {
.volatile_reg = ltr501_is_volatile_reg,
};
+static void ltr501_disable_regulators(void *d)
+{
+ struct ltr501_data *data = d;
+
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
+}
+
static int ltr501_powerdown(struct ltr501_data *data)
{
return ltr501_write_contr(data, data->als_contr &
@@ -1412,6 +1466,25 @@ static int ltr501_probe(struct i2c_client *client,
mutex_init(&data->lock_als);
mutex_init(&data->lock_ps);
+ data->regulators[0].supply = "vdd";
+ data->regulators[1].supply = "vddio";
+ ret = devm_regulator_bulk_get(&client->dev,
+ ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (ret)
+ return dev_err_probe(&client->dev, ret,
+ "Failed to get regulators\n");
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(&client->dev,
+ ltr501_disable_regulators, data);
+ if (ret)
+ return ret;
+
data->reg_it = devm_regmap_field_alloc(&client->dev, regmap,
reg_field_it);
if (IS_ERR(data->reg_it)) {
@@ -1479,7 +1552,10 @@ static int ltr501_probe(struct i2c_client *client,
if ((partid >> 4) != data->chip_info->partid)
return -ENODEV;
- indio_dev->dev.parent = &client->dev;
+ if (device_property_read_u32(&client->dev, "proximity-near-level",
+ &data->near_level))
+ data->near_level = 0;
+
indio_dev->info = data->chip_info->info;
indio_dev->channels = data->chip_info->channels;
indio_dev->num_channels = data->chip_info->no_channels;
@@ -1524,18 +1600,15 @@ powerdown_on_error:
return ret;
}
-static int ltr501_remove(struct i2c_client *client)
+static void ltr501_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
ltr501_powerdown(iio_priv(indio_dev));
-
- return 0;
}
-#ifdef CONFIG_PM_SLEEP
static int ltr501_suspend(struct device *dev)
{
struct ltr501_data *data = iio_priv(i2c_get_clientdata(
@@ -1551,30 +1624,40 @@ static int ltr501_resume(struct device *dev)
return ltr501_write_contr(data, data->als_contr,
data->ps_contr);
}
-#endif
-static SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);
static const struct acpi_device_id ltr_acpi_match[] = {
- {"LTER0501", ltr501},
- {"LTER0559", ltr559},
- {"LTER0301", ltr301},
+ { "LTER0501", ltr501 },
+ { "LTER0559", ltr559 },
+ { "LTER0301", ltr301 },
{ },
};
MODULE_DEVICE_TABLE(acpi, ltr_acpi_match);
static const struct i2c_device_id ltr501_id[] = {
- { "ltr501", ltr501},
- { "ltr559", ltr559},
- { "ltr301", ltr301},
+ { "ltr501", ltr501 },
+ { "ltr559", ltr559 },
+ { "ltr301", ltr301 },
+ { "ltr303", ltr303 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ltr501_id);
+static const struct of_device_id ltr501_of_match[] = {
+ { .compatible = "liteon,ltr501", },
+ { .compatible = "liteon,ltr559", },
+ { .compatible = "liteon,ltr301", },
+ { .compatible = "liteon,ltr303", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ltr501_of_match);
+
static struct i2c_driver ltr501_driver = {
.driver = {
.name = LTR501_DRV_NAME,
- .pm = &ltr501_pm_ops,
+ .of_match_table = ltr501_of_match,
+ .pm = pm_sleep_ptr(&ltr501_pm_ops),
.acpi_match_table = ACPI_PTR(ltr_acpi_match),
},
.probe = ltr501_probe,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.