kernel/git/stable/linux.git/drivers/iio/pressure/bmp280.h, branch master

iio: pressure: bmp280: drop sensor_data array

2025-05-21T13:20:28+00:00

Drop the sensor_data array from struct bmp280_data and replace it using local structs in each interrupt handler. The sensor_data array in struct bmp280_data is not used to share data between functions and isn't used for DMA, so there isn't really a need to have it in the struct. Instead, we can use the struct pattern for scan data in each interrupt handler. This has the advantage of allowing us to see the actual layout of each scan buffer for each different type of supported sensor. It also avoid juggling values between local variables and the array which makes the code a bit simpler by avoiding some extra assignments. We can also drop the BME280_NUM_MAX_CHANNELS macro as it is no longer used. Suggested-by: Jonathan Cameron Link: https://lore.kernel.org/linux-iio/20250421135540.1a667221@jic23-huawei/ Signed-off-by: David Lechner Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20250422-iio-pressure-bmp280-rework-push-to-buffers-v1-1-ee722f29aeca@baylibre.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Make time vars intuitive and move to fsleep

2024-12-11T19:20:49+00:00

Move sleep functions to the new fsleep() implementation. While at it, add time unit abbreviation as a suffix of time describing variables to make them more intuitive. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241202181907.21471-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Use sizeof() for denominator

2024-12-11T19:20:49+00:00

Instead of using magic number 2 as a denominator, make it intuitive by using sizeof(). Reviewed-by: Andy Shevchenko Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241202181907.21471-3-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Move bmp085 interrupt to new configuration

2024-10-21T18:19:25+00:00

This commit intends to add the old BMP085 sensor to the new IRQ interface of the driver for consistence. No functional changes intended. The BMP085 sensor is equivalent with the BMP180 with the only difference of BMP085 having an extra interrupt pin to inform about an End of Conversion. Reviewed-by: Andy Shevchenko Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241017233022.238250-5-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Add data ready trigger support

2024-10-21T18:19:25+00:00

The BMP3xx and BMP5xx sensors have an interrupt pin which can be used as a trigger for when there are data ready in the sensor for pick up. This use case is used along with NORMAL_MODE in the sensor, which allows the sensor to do consecutive measurements depending on the ODR rate value. The trigger pin can be configured to be open-drain or push-pull and either rising or falling edge. No support is added yet for interrupts for FIFO, WATERMARK and out of range values. Reviewed-by: Andy Shevchenko Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241017233022.238250-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Use sleep and forced mode for oneshot captures

2024-10-21T18:19:24+00:00

Add forced mode support in sensors BMP28x, BME28x, BMP3xx and BMP58x. Sensors BMP18x and BMP085 are old and do not support this feature so their operation is not affected at all. Essentially, up to now, the rest of the sensors were used in normal mode all the time. This means that they are continuously doing measurements even though these measurements are not used. Even though the sensor does provide PM support, to cover all the possible use cases, the sensor needs to go into sleep mode and wake up whenever necessary. The idea is that the sensor is by default in sleep mode, wakes up in forced mode when a oneshot capture is requested, or in normal mode when the buffer is enabled. The difference lays in the fact that in forced mode, the sensor does only one conversion and goes back to sleep while in normal mode, the sensor does continuous measurements with the frequency that was set in the ODR registers. The bmpX_chip_config() functions which are responsible for applying the requested configuration to the sensor, are modified accordingly in order to set the sensor by default in sleep mode. DEEP STANDBY, Low Power NORMAL and CONTINUOUS modes, supported only by the BMP58x version, are not added. Reviewed-by: Andy Shevchenko Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241017233022.238250-2-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Use char instead of s32 for data buffer

2024-10-06T14:04:44+00:00

As it was reported and discussed here [1], storing the sensor data in an endian aware s32 buffer is not optimal. Advertising the timestamp as an addition of 2 s32 variables which is also implied is again not the best practice. For that reason, change the s32 sensor_data buffer to a u8 buffer and align it properly. [1]: https://lore.kernel.org/linux-iio/73d13cc0-afb9-4306-b498-5d821728c3ba@stanley.mountain/ Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20240930202353.38203-3-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Add support for bmp280 soft reset

2024-09-30T08:21:02+00:00

The BM(P/E)28x devices have an option for soft reset which is also recommended by the Bosch Sensortech BME2 Sensor API to be used before the initial configuration of the device. Link: https://github.com/boschsensortec/BME280_SensorAPI/blob/bme280_v3.5.1/bme280.c#L429 Signed-off-by: Vasileios Amoiridis Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20240902184222.24874-3-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Use bulk read for humidity calibration data

2024-09-30T08:21:01+00:00

Convert individual reads to a bulk read for the humidity calibration data. Signed-off-by: Vasileios Amoiridis Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20240902184222.24874-2-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: Sort headers alphabetically

2024-08-03T09:13:38+00:00

Sort headers in alphabetical order Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20240711211558.106327-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron