github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-25 15:41:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

iio: light: veml6030: add support for triggered buffer

Browse Source 
All devices supported by this driver (currently veml6030, veml6035
and veml7700) have two 16-bit channels, and can profit for the same
configuration to support data access via triggered buffers.

The measurements are stored in two 16-bit consecutive registers
(addresses 0x04 and 0x05) as little endian, unsigned data.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241124-veml6030_triggered_buffer-v3-1-565bb6b4b5c8@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Javier Carrasco 2024-11-24 19:59:06 +01:00 committed by Jonathan Cameron
parent c437190cea
commit 582d732bf6
2 changed files with 78 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iio/light/Kconfig
View File

@ -667,6 +667,8 @@ config VEML3235
config VEML6030
tristate "VEML6030 and VEML6035 ambient light sensors"
select REGMAP_I2C
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
depends on I2C
help
Say Y here if you want to build a driver for the Vishay VEML6030

76
drivers/iio/light/veml6030.c
View File

@ -28,6 +28,8 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/events.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
/* Device registers */
#define VEML6030_REG_ALS_CONF 0x00
@ -37,6 +39,7 @@
#define VEML6030_REG_ALS_DATA 0x04
#define VEML6030_REG_WH_DATA 0x05
#define VEML6030_REG_ALS_INT 0x06
#define VEML6030_REG_DATA(ch) (VEML6030_REG_ALS_DATA + (ch))
/* Bit masks for specific functionality */
#define VEML6030_ALS_IT GENMASK(9, 6)
@ -56,6 +59,12 @@
#define VEML6035_INT_CHAN BIT(3)
#define VEML6035_CHAN_EN BIT(2)
enum veml6030_scan {
VEML6030_SCAN_ALS,
VEML6030_SCAN_WH,
VEML6030_SCAN_TIMESTAMP,
};
struct veml603x_chip {
const char *name;
const int(*scale_vals)[][2];
@ -242,6 +251,13 @@ static const struct iio_chan_spec veml6030_channels[] = {
BIT(IIO_CHAN_INFO_SCALE),
.event_spec = veml6030_event_spec,
.num_event_specs = ARRAY_SIZE(veml6030_event_spec),
.scan_index = VEML6030_SCAN_ALS,
.scan_type = {
.sign = 'u',
.realbits = 16,
.storagebits = 16,
.endianness = IIO_CPU,
},
},
{
.type = IIO_INTENSITY,
@ -253,7 +269,15 @@ static const struct iio_chan_spec veml6030_channels[] = {
BIT(IIO_CHAN_INFO_SCALE),
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
BIT(IIO_CHAN_INFO_SCALE),
.scan_index = VEML6030_SCAN_WH,
.scan_type = {
.sign = 'u',
.realbits = 16,
.storagebits = 16,
.endianness = IIO_CPU,
},
},
IIO_CHAN_SOFT_TIMESTAMP(VEML6030_SCAN_TIMESTAMP),
};
static const struct iio_chan_spec veml7700_channels[] = {
@ -266,6 +290,13 @@ static const struct iio_chan_spec veml7700_channels[] = {
BIT(IIO_CHAN_INFO_SCALE),
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
BIT(IIO_CHAN_INFO_SCALE),
.scan_index = VEML6030_SCAN_ALS,
.scan_type = {
.sign = 'u',
.realbits = 16,
.storagebits = 16,
.endianness = IIO_CPU,
},
},
{
.type = IIO_INTENSITY,
@ -277,7 +308,15 @@ static const struct iio_chan_spec veml7700_channels[] = {
BIT(IIO_CHAN_INFO_SCALE),
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
BIT(IIO_CHAN_INFO_SCALE),
.scan_index = VEML6030_SCAN_WH,
.scan_type = {
.sign = 'u',
.realbits = 16,
.storagebits = 16,
.endianness = IIO_CPU,
},
},
IIO_CHAN_SOFT_TIMESTAMP(VEML6030_SCAN_TIMESTAMP),
};
static const struct regmap_config veml6030_regmap_config = {
@ -889,6 +928,37 @@ static irqreturn_t veml6030_event_handler(int irq, void *private)
return IRQ_HANDLED;
}
static irqreturn_t veml6030_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *iio = pf->indio_dev;
struct veml6030_data *data = iio_priv(iio);
unsigned int reg;
int ch, ret, i = 0;
struct {
u16 chans[2];
aligned_s64 timestamp;
} scan;
memset(&scan, 0, sizeof(scan));
iio_for_each_active_channel(iio, ch) {
ret = regmap_read(data->regmap, VEML6030_REG_DATA(ch),
&reg);
if (ret)
goto done;
scan.chans[i++] = reg;
}
iio_push_to_buffers_with_timestamp(iio, &scan, pf->timestamp);
done:
iio_trigger_notify_done(iio->trig);
return IRQ_HANDLED;
}
static int veml6030_set_info(struct iio_dev *indio_dev)
{
struct veml6030_data *data = iio_priv(indio_dev);
@ -1077,6 +1147,12 @@ static int veml6030_probe(struct i2c_client *client)
if (ret < 0)
return ret;
ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
veml6030_trigger_handler, NULL);
if (ret)
return dev_err_probe(&client->dev, ret,
"Failed to register triggered buffer");
return devm_iio_device_register(&client->dev, indio_dev);
}