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This adds a new driver for the Invensense MPU-3050 gyroscope. This driver is based on information from the rough input driver in drivers/input/misc/mpu3050.c and the scratch misc driver posted by Nathan Royer in 2011. Some years have passed but this is finally a fully-fledged driver for this gyroscope. It was developed and tested on the Qualcomm APQ8060 Dragonboard. The driver supports both raw and buffered input. It also supports the internal trigger mechanism by registering a trigger that can fire in response to the internal sample engine of the component. In addition to reading out the gyroscope sensor values, the driver also supports reading the temperature from the sensor. The driver currently only supports I2C but the MPU-3050 can also be used from SPI, so the I2C portions are split in their own file and we just use regmap to access all registers, so it will be trivial to plug in SPI support if/when someone has a system requiring this. To conserve power, the driver utilizes the runtime PM framework and will put the sensor in off mode and disable the regulators when unused, after a timeout of 10 seconds. The fullscale can be set for the sensor to 250, 500, 1000 or 2000 deg/s. This corresponds to scale values of rougly 0.000122, 0.000275, 0.000512 or 0.001068. By writing such values (or close to these) into "in_anglevel_scale", the corresponding fullscale can be chosen. It will default to 2000 deg/s (~35 rad/s). The gyro component can have DC offsets on all axes. These can be compensated using the standard sysfs ABI property "in_anglevel_[xyz]_calibbias". This is in positive/negative values of the raw values, so a suitable calibration bias can be determined by userspace by reading the "in_anglevel_[xyz]_raw" for a few iterations while holding the sensor still, create an average integer, and writing the negative inverse of that into "in_anglevel_[xyz]_calibbias". After this the hardware will automatically subtract the bias, also when using buffered readings. Since the MPU-3050 has an outgoing I2C port it needs to act as an I2C mux. This means that the device is switching I2C traffic to devices beyond it. On my system this is the only way to reach the accelerometer. The "sensor fusion" ability of the MPU-3050 to directly talk to the device on the outgoing I2C port is currently not used by the driver, but it has code to allow I2C traffic to pass through so that the Linux kernel can reach the device on the other side with a kernel driver. Example usage with the native trigger: $ generic_buffer -a -c10 -n mpu3050 iio device number being used is 0 iio trigger number being used is 0 No channels are enabled, enabling all channels Enabling: in_anglvel_z_en Enabling: in_timestamp_en Enabling: in_anglvel_y_en Enabling: in_temp_en Enabling: in_anglvel_x_en /sys/bus/iio/devices/iio:device0 mpu3050-dev0 29607.142578 -0.117493 0.074768 0.012817 180788797150 29639.285156 -0.117493 0.076904 0.013885 180888982335 29696.427734 -0.116425 0.076904 0.012817 180989178039 29742.857422 -0.117493 0.076904 0.012817 181089377742 29764.285156 -0.116425 0.077972 0.012817 181189574187 29860.714844 -0.115356 0.076904 0.012817 181289772705 29864.285156 -0.117493 0.076904 0.012817 181389971520 29910.714844 -0.115356 0.076904 0.013885 181490170483 29917.857422 -0.116425 0.076904 0.011749 181590369742 29975.000000 -0.116425 0.076904 0.012817 181690567075 Disabling: in_anglvel_z_en Disabling: in_timestamp_en Disabling: in_anglvel_y_en Disabling: in_temp_en Disabling: in_anglvel_x_en The first column is the temperature in millidegrees, then the x,y,z axes in succession followed by the timestamp. Also tested successfully using the HRTimer trigger. Cc: Nick Vaccaro <nvaccaro@google.com> Cc: Ge Gao <ggao@invensense.com> Cc: Anna Si <asi@invensense.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Crestez Dan Leonard <leonard.crestez@intel.com> Cc: Daniel Baluta <daniel.baluta@intel.com> Cc: Gregor Boirie <gregor.boirie@parrot.com> Cc: Peter Rosin <peda@axentia.se> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
142 lines
4.0 KiB
Plaintext
142 lines
4.0 KiB
Plaintext
#
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# IIO Digital Gyroscope Sensor drivers configuration
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#
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# When adding new entries keep the list in alphabetical order
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menu "Digital gyroscope sensors"
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config ADIS16080
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tristate "Analog Devices ADIS16080/100 Yaw Rate Gyroscope with SPI driver"
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depends on SPI
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help
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Say yes here to build support for Analog Devices ADIS16080, ADIS16100 Yaw
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Rate Gyroscope with SPI.
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config ADIS16130
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tristate "Analog Devices ADIS16130 High Precision Angular Rate Sensor driver"
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depends on SPI
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help
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Say yes here to build support for Analog Devices ADIS16130 High Precision
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Angular Rate Sensor driver.
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config ADIS16136
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tristate "Analog devices ADIS16136 and similar gyroscopes driver"
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depends on SPI_MASTER
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select IIO_ADIS_LIB
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select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
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help
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Say yes here to build support for the Analog Devices ADIS16133, ADIS16135,
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ADIS16136 gyroscope devices.
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config ADIS16260
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tristate "Analog Devices ADIS16260 Digital Gyroscope Sensor SPI driver"
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depends on SPI
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select IIO_ADIS_LIB
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select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
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help
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Say yes here to build support for Analog Devices ADIS16260 ADIS16265
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ADIS16250 ADIS16255 and ADIS16251 programmable digital gyroscope sensors.
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This driver can also be built as a module. If so, the module
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will be called adis16260.
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config ADXRS450
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tristate "Analog Devices ADXRS450/3 Digital Output Gyroscope SPI driver"
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depends on SPI
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help
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Say yes here to build support for Analog Devices ADXRS450 and ADXRS453
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programmable digital output gyroscope.
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This driver can also be built as a module. If so, the module
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will be called adxrs450.
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config BMG160
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tristate "BOSCH BMG160 Gyro Sensor"
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depends on (I2C || SPI_MASTER)
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select BMG160_I2C if (I2C)
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select BMG160_SPI if (SPI)
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help
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Say yes here to build support for BOSCH BMG160 Tri-axis Gyro Sensor
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driver connected via I2C or SPI. This driver also supports BMI055
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gyroscope.
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This driver can also be built as a module. If so, the module
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will be called bmg160_i2c or bmg160_spi.
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config BMG160_I2C
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tristate
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select REGMAP_I2C
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config BMG160_SPI
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tristate
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select REGMAP_SPI
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config HID_SENSOR_GYRO_3D
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depends on HID_SENSOR_HUB
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select HID_SENSOR_IIO_COMMON
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select HID_SENSOR_IIO_TRIGGER
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tristate "HID Gyroscope 3D"
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help
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Say yes here to build support for the HID SENSOR
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Gyroscope 3D.
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config MPU3050
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tristate
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select REGMAP
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config MPU3050_I2C
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tristate "Invensense MPU3050 devices on I2C"
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depends on !(INPUT_MPU3050=y || INPUT_MPU3050=m)
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select MPU3050
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select REGMAP_I2C
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select I2C_MUX
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help
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This driver supports the Invensense MPU3050 gyroscope over I2C.
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This driver can be built as a module. The module will be called
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inv-mpu3050-i2c.
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config IIO_ST_GYRO_3AXIS
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tristate "STMicroelectronics gyroscopes 3-Axis Driver"
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depends on (I2C || SPI_MASTER) && SYSFS
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select IIO_ST_SENSORS_CORE
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select IIO_ST_GYRO_I2C_3AXIS if (I2C)
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select IIO_ST_GYRO_SPI_3AXIS if (SPI_MASTER)
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select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
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help
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Say yes here to build support for STMicroelectronics gyroscopes:
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L3G4200D, LSM330DL, L3GD20, LSM330DLC, L3G4IS, LSM330, LSM9DS0.
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This driver can also be built as a module. If so, these modules
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will be created:
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- st_gyro (core functions for the driver [it is mandatory]);
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- st_gyro_i2c (necessary for the I2C devices [optional*]);
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- st_gyro_spi (necessary for the SPI devices [optional*]);
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(*) one of these is necessary to do something.
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config IIO_ST_GYRO_I2C_3AXIS
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tristate
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depends on IIO_ST_GYRO_3AXIS
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depends on IIO_ST_SENSORS_I2C
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config IIO_ST_GYRO_SPI_3AXIS
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tristate
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depends on IIO_ST_GYRO_3AXIS
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depends on IIO_ST_SENSORS_SPI
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config ITG3200
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tristate "InvenSense ITG3200 Digital 3-Axis Gyroscope I2C driver"
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depends on I2C
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select IIO_TRIGGERED_BUFFER if IIO_BUFFER
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help
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Say yes here to add support for the InvenSense ITG3200 digital
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3-axis gyroscope sensor.
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endmenu
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