kernel/git/stable/linux.git/drivers/iio/pressure, branch linux-4.8.y

iio: pressure: bmp280: fix runtime suspend/resume crash

2016-08-15T14:46:06+00:00

In commit 3d838118c6aa ("iio: pressure: bmp280: add power management") For some reason the code in the runtime suspend/resume hooks got wrong (I suspect in the ambition to cut down boilerplate) and it seems it was tested without CONFIG_PM and crashes like so for me: Unable to handle kernel NULL pointer dereference at virtual address 0000000c pgd = c0204000 [0000000c] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 89 Comm: kworker/1:2 Not tainted 4.7.0-03348-g90dc3680458a-dirty #99 Hardware name: Generic DT based system Workqueue: pm pm_runtime_work task: df3c6300 ti: dec8a000 task.ti: dec8a000 PC is at regulator_disable+0x0/0x6c LR is at bmp280_runtime_suspend+0x3c/0xa4 Dereferencing the BMP280 state container properly fixes the problem, sorry for screwing up. Fixes: 3d838118c6aa ("iio: pressure: bmp280: add power management") Signed-off-by: Linus Walleij Tested-by: Jarkko Nikula Cc: Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: fix wrong pointer passed to PTR_ERR()

2016-08-15T14:38:59+00:00

PTR_ERR should access the value just tested by IS_ERR, otherwise the wrong error code will be returned. Signed-off-by: Wei Yongjun Reviewed-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio:st_pressure: clean useless static channel initializers

2016-07-04T17:13:54+00:00

Some static channels are explicitly initialized with default values. Remove them to enhance readability. Signed-off-by: Gregor Boirie Tested-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio:st_pressure:lps22hb: temperature support

2016-07-04T17:13:02+00:00

Implement lps22hb temperature sampling channel. Signed-off-by: Gregor Boirie Tested-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio:st_pressure:lps22hb: open drain support

2016-07-04T17:12:21+00:00

Add support for open drain interrupt line. Signed-off-by: Gregor Boirie Signed-off-by: Jonathan Cameron

iio:st_pressure: temperature triggered buffering

2016-07-04T17:11:52+00:00

Enable support for triggered buffering of temperature samples. Signed-off-by: Gregor Boirie Tested-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio:st_pressure: document sampling gains

2016-07-04T17:11:26+00:00

Details scaling factors and offsets applied to raw temperature and pressure samples. Signed-off-by: Gregor Boirie Tested-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio:st_pressure: align storagebits on power of 2

2016-07-04T17:11:07+00:00

Sampled pressure data are 24 bits long and should be stored in a 32 bits word. Signed-off-by: Gregor Boirie Tested-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: read calibration data once

2016-07-03T10:32:15+00:00

The calibration data is described as coming from an E2PROM and that means it does not change. Just read it once at probe time and store it in the device state container. Also toss the calibration data into the entropy pool since it is device unique. Reviewed-by: Vlad Dogaru Signed-off-by: Linus Walleij Signed-off-by: Jonathan Cameron

iio: pressure: bmp280: add power management

2016-07-03T10:32:14+00:00

The PM280 has an internal standby-mode, but to really save power we should shut the sensor down and disconnect the power. With the proper .pm hooks we can enable both runtime and system power management of the sensor. We use the *force callbacks from the system PM hooks. When the sensor comes back we always reconfigure it to make sure it is ready to roll as expected. Cc: Ulf Hansson Signed-off-by: Linus Walleij Signed-off-by: Jonathan Cameron