diff options
| author | Vasileios Amoiridis <vassilisamir@gmail.com> | 2024-06-28 20:17:26 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-08-03 12:13:36 +0300 |
| commit | 80cd23f43ddce3bfa0389ab65a442d3dc8de4b4f (patch) | |
| tree | 700909a5d07f45d8dbc1781c5c144d14cfb068ad /drivers/iio/pressure/bmp280.h | |
| parent | 479e67ac648009b992c4651f5ad0d6dc5b201e4e (diff) | |
| download | linux-80cd23f43ddce3bfa0389ab65a442d3dc8de4b4f.tar.xz | |
iio: pressure: bmp280: Add triggered buffer support
BMP2xx, BME280, BMP3xx, and BMP5xx use continuous buffers for their
temperature, pressure and humidity readings. This facilitates the
use of burst/bulk reads in order to acquire data faster. The
approach is different from the one used in oneshot captures.
BMP085 & BMP1xx devices use a completely different measurement
process that is well defined and is used in their buffer_handler().
Suggested-by: Angel Iglesias <ang.iglesiasg@gmail.com>
Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
Link: https://lore.kernel.org/r/20240512230524.53990-6-vassilisamir@gmail.com
Link: https://patch.msgid.link/20240628171726.124852-4-vassilisamir@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/pressure/bmp280.h')
| -rw-r--r-- | drivers/iio/pressure/bmp280.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h index a3d2cd722760..0933e411ae2c 100644 --- a/drivers/iio/pressure/bmp280.h +++ b/drivers/iio/pressure/bmp280.h @@ -304,6 +304,16 @@ #define BMP280_PRESS_SKIPPED 0x80000 #define BMP280_HUMIDITY_SKIPPED 0x8000 +/* Number of bytes for each value */ +#define BMP280_NUM_PRESS_BYTES 3 +#define BMP280_NUM_TEMP_BYTES 3 +#define BME280_NUM_HUMIDITY_BYTES 2 +#define BMP280_BURST_READ_BYTES (BMP280_NUM_PRESS_BYTES + \ + BMP280_NUM_TEMP_BYTES) +#define BME280_BURST_READ_BYTES (BMP280_NUM_PRESS_BYTES + \ + BMP280_NUM_TEMP_BYTES + \ + BME280_NUM_HUMIDITY_BYTES) + /* Core exported structs */ static const char *const bmp280_supply_names[] = { @@ -398,12 +408,18 @@ struct bmp280_data { int sampling_freq; /* + * Data to push to userspace triggered buffer. Up to 3 channels and + * s64 timestamp, aligned. + */ + s32 sensor_data[6] __aligned(8); + + /* * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ union { /* Sensor data buffer */ - u8 buf[3]; + u8 buf[BME280_BURST_READ_BYTES]; /* Calibration data buffers */ __le16 bmp280_cal_buf[BMP280_CONTIGUOUS_CALIB_REGS / 2]; __be16 bmp180_cal_buf[BMP180_REG_CALIB_COUNT / 2]; @@ -425,6 +441,7 @@ struct bmp280_chip_info { const struct iio_chan_spec *channels; int num_channels; unsigned int start_up_time; + const unsigned long *avail_scan_masks; const int *oversampling_temp_avail; int num_oversampling_temp_avail; @@ -459,6 +476,8 @@ struct bmp280_chip_info { int (*read_humid)(struct bmp280_data *data, u32 *adc_humidity); int (*read_calib)(struct bmp280_data *data); int (*preinit)(struct bmp280_data *data); + + irqreturn_t (*trigger_handler)(int irq, void *p); }; /* Chip infos for each variant */ |