diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/light/max44000.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/iio/light/max44000.c b/drivers/iio/light/max44000.c index 05e11698201a..e01e58a9bd14 100644 --- a/drivers/iio/light/max44000.c +++ b/drivers/iio/light/max44000.c @@ -19,6 +19,9 @@ #include <linux/util_macros.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> #include <linux/acpi.h> #define MAX44000_DRV_NAME "max44000" @@ -125,24 +128,41 @@ static const char max44000_scale_avail_str[] = "0.5 " "4"; +#define MAX44000_SCAN_INDEX_ALS 0 +#define MAX44000_SCAN_INDEX_PRX 1 + static const struct iio_chan_spec max44000_channels[] = { { .type = IIO_LIGHT, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_INT_TIME), + .scan_index = MAX44000_SCAN_INDEX_ALS, + .scan_type = { + .sign = 'u', + .realbits = 14, + .storagebits = 16, + } }, { .type = IIO_PROXIMITY, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), + .scan_index = MAX44000_SCAN_INDEX_PRX, + .scan_type = { + .sign = 'u', + .realbits = 8, + .storagebits = 16, + } }, + IIO_CHAN_SOFT_TIMESTAMP(2), { .type = IIO_CURRENT, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), .extend_name = "led", .output = 1, + .scan_index = -1, }, }; @@ -467,6 +487,41 @@ static const struct regmap_config max44000_regmap_config = { .cache_type = REGCACHE_RBTREE, }; +static irqreturn_t max44000_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct max44000_data *data = iio_priv(indio_dev); + u16 buf[8]; /* 2x u16 + padding + 8 bytes timestamp */ + int index = 0; + unsigned int regval; + int ret; + + mutex_lock(&data->lock); + if (test_bit(MAX44000_SCAN_INDEX_ALS, indio_dev->active_scan_mask)) { + ret = max44000_read_alsval(data); + if (ret < 0) + goto out_unlock; + buf[index++] = ret; + } + if (test_bit(MAX44000_SCAN_INDEX_PRX, indio_dev->active_scan_mask)) { + ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, ®val); + if (ret < 0) + goto out_unlock; + buf[index] = regval; + } + mutex_unlock(&data->lock); + + iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns()); + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; + +out_unlock: + mutex_unlock(&data->lock); + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + static int max44000_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -534,6 +589,12 @@ static int max44000_probe(struct i2c_client *client, return ret; } + ret = iio_triggered_buffer_setup(indio_dev, NULL, max44000_trigger_handler, NULL); + if (ret < 0) { + dev_err(&client->dev, "iio triggered buffer setup failed\n"); + return ret; + } + return iio_device_register(indio_dev); } @@ -542,6 +603,7 @@ static int max44000_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); return 0; } |