On Mon, Feb 22, 2016 at 1:17 AM, Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote: > On Thu, Feb 18, 2016 at 05:53:05PM +0200, Daniel Baluta wrote: >> Sending this as an RFC because I don't know if style fixes are appropriate >> for this driver and also not sure if deadlock fix is the best solution. >> >> I2C people should only look at patches 8/9 and 9/9. >> >> The mpu6050 accel+gyro combo has an auxiliary I2C bus, allowing for >> an auxiliary sensor to be connected (eg. a magnetometer). >> >> The mpu can either act as an I2C master (functionality not currently >> implemented in the driver) or it can use a bypass multiplexer which >> directly connects the auxiliary I2C bus pins to the main I2C bus pins [1] >> Currently the driver implements the bypass mode via an I2C mux. >> >> This patchset fixes a deadlock in inv-mpu6050 IMU which happens when >> magnetometer (on auxiliary I2C bus) runs in parallel with accel or gyro. >> >> First 7 patches do some cleanup in order to make INV MPU6050 code easier >> to read. >> >> Patch number 8 allows passing NULL select callbacks to i2c_mux_master_xfer >> and i2c_mux_smbus_xfer. >> >> Patch number 9 actually fixes the deadlock. > > We recently had a bigger patch series fixing locking problems related to > muxes. I sadly didn't have the time to review it. Can you have a look if > it helps your case? > > http://thread.gmane.org/gmane.linux.drivers.i2c/26169 Thanks Wolfram, Will look into it. -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
