kernel/git/stable/linux.git/drivers/iio/chemical/bme680.h, branch master

iio: chemical: bme680: add power management

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

Add runtime power management to the device. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241202192341.33187-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Add support for preheat current

2024-11-03T20:33:45+00:00

Add functionality to inject a specified amount of current to the heating plate before the start of the gas measurement to allow the sensor to reach faster to the requested temperature. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241102131311.36210-5-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Add triggered buffer support

2024-11-03T20:33:45+00:00

Add triggered buffer and soft timestamp support. The available scan mask enables all the channels of the sensor in order to follow the operation of the sensor. The sensor basically starts to capture from all channels as long as it enters into FORCED mode. The bulk read, reads a total of 15 registers from the sensor, 0x1D..0x2B. Even though some of those registers are not reported in the register map of the device, this is how the BME680 Sensor API [1] proposes to do it. This allows to have one bulk read instead of multiple ones. Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L1200 Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241102131311.36210-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: refactorize set_mode() mode

2024-11-03T20:33:45+00:00

Refactorize the set_mode() function to use an external enum that describes the possible modes of the BME680 device instead of using true/false variables for selecting SLEEPING/FORCED mode. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241102131311.36210-2-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: optimize startup time

2024-11-01T14:54:47+00:00

According to datasheet's Section 1.1, Table 1, the startup time for the device is 2ms and not 5ms. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241021195316.58911-3-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Add missing regmap.h include

2024-11-01T14:54:46+00:00

Add the linux/regmap.h header since the struct regmap_config is used in this file. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20241021195316.58911-2-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Modify startup procedure

2024-08-03T09:13:35+00:00

Modify the startup procedure to reflect the procedure of the Bosch BME68x Sensor API. The initial readings and configuration of the sensor need to happen in the following order: 1) Read calibration data [1,2] 2) Chip general configuration [3] 3) Gas configuration [4] After the chip configuration it is necessary to ensure that the sensor is in sleeping mode, in order to apply the gas configuration settings [5]. Also, after the soft reset, it is advised to wait for 5ms [6]. Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L162 # [1] Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/examples/forced_mode/forced_mode.c#L44 # [2] Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/examples/forced_mode/forced_mode.c#L53 # [3] Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/examples/forced_mode/forced_mode.c#L60 # [4] Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L640 # [5] Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L294 # [6] Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20240609233826.330516-12-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Add read buffers in read/write buffer union

2024-08-03T09:13:34+00:00

Move the buffers that are used in order to read data from the device in the union which handles all the device read/write buffers. Also create defines for the number of bytes that are being read from the device and don't use magic numbers. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20240609233826.330516-10-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Use bulk reads for calibration data

2024-08-03T09:13:34+00:00

Calibration data are located in contiguous-ish registers inside the chip. For that reason we can use bulk reads as is done as well in the BME68x Sensor API [1]. The arrays that are used for reading the data out of the sensor are located inside DMA safe buffer. Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x.c#L1769 # [1] Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20240609233826.330516-8-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron

iio: chemical: bme680: Remove duplicate register read

2024-08-03T09:13:34+00:00

The LSB of the gas register was read first to check if the following check was correct and then the MSB+LSB were read together. Simplify this by reading together the MSB+LSB immediately. Signed-off-by: Vasileios Amoiridis Link: https://patch.msgid.link/20240609233826.330516-7-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron