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It has been reported for a while that with iio-sensor-proxy service the
rotation only works after one suspend/resume cycle. This required a wait
in the systemd unit file to avoid race. I found a Yoga 900 where I could
reproduce this.
The problem scenerio is:
- During sensor driver init, enable run time PM and also set a
auto-suspend for 3 seconds.
This result in one runtime resume. But there is a check to avoid
a powerup in this sequence, but rpm is active
- User space iio-sensor-proxy tries to power up the sensor. Since rpm is
active it will simply return. But sensors were not actually
powered up in the prior sequence, so actaully the sensors will not work
- After 3 seconds the auto suspend kicks
If we add a wait in systemd service file to fire iio-sensor-proxy after
3 seconds, then now everything will work as the runtime resume will
actually powerup the sensor as this is a user request.
To avoid this:
- Remove the check to match user requested state, this will cause a
brief powerup, but if the iio-sensor-proxy starts immediately it will
still work as the sensors are ON.
- Also move the autosuspend delay to place when user requested turn off
of sensors, like after user finished raw read or buffer disable
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fix reading trigger mode, when other bit-fields are set. SMCR register
value must be masked to read SMS (slave mode selection) only.
Fixes: 9eba381 ("iio: make stm32 trigger driver use
INDIO_HARDWARE_TRIGGERED mode")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
According to the datasheet, the range of the acceleration is [-10 g, + 10 g],
so the scale factor should be 10 instead of 5.
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The kerneldoc description for the trig_readonly field of struct iio_dev
lacked a colon, leading to this doc build warning:
./include/linux/iio/iio.h:603: warning: No description found for parameter 'trig_readonly'
A similar issue for iio_trigger_set_immutable() in trigger.h yielded:
./include/linux/iio/trigger.h:151: warning: No description found for parameter 'indio_dev'
./include/linux/iio/trigger.h:151: warning: No description found for parameter 'trig'
Fix the formatting and silence the warnings.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
ADC clock input is provided to internal prescaler (that decreases its
frequency). It's then used as reference clock for conversions.
- Fix common clock rate used then by stm32-adc sub-devices. Take common
prescaler into account. Currently, rate is used to set "boost" mode.
It may unnecessarily be set. This impacts power consumption.
- Fix ADC max clock rate on STM32H7 (fADC from datasheet). Currently,
prescaler may be set too low. This can result in ADC reference
clock used for conversion to exceed max allowed clock frequency.
Fixes: 95e339b6e85d ("iio: adc: stm32: add support for STM32H7")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Proper support for the INA219 lowered the minimum sampling period from
2*140us to 2*84us. Subtracting 200us later leads to an underflow and
an almost infinite udelay later.
Using a signed int for the sampling period provides sufficient range
(at most 2*8640*1024us), but catches the underflow when comparing with
buffer_us.
Fixes: 18edac2e22f4 ("iio: adc: Fix integration time/averaging for INA219/220")
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
In order to use encoder mode, timers needs to be enabled (e.g. CEN bit)
along with peripheral clock.
Add IIO_CHAN_INFO_ENABLE attribute to handle this.
Also, in triggered mode, CEN bit is set automatically in hardware.
Then clock must be enabled before starting triggered mode.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")
This fixes two issues:
- stm32_set_count_direction: to set down direction
- stm32_get_count_direction: to get down direction
IIO core provides/expects value to be an index of iio_enum items array.
This needs to be turned by these routines into TIM_CR1_DIR (e.g. BIT(4))
value.
Also, report error when attempting to write direction, when in encoder
mode: in this case, direction is read only (given by encoder inputs).
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")
IIO core expects zero as return value for write_raw() callback
in case of success.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")
SMS bitfiled is mode + 1. After reset, upon boot, SMS = 0. When reading
from sysfs, stm32_get_quadrature_mode() returns -1 (e.g. -EPERM) which is
wrong error code here. So, check SMS bitfiled matches valid encoder mode,
or return -EINVAL.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
If the device is not initialized at least once it happens that the humidity
reading is skipped, which means the special value 0x8000 is delivered.
For omitting this case the oversampling of the humidity must be set before
the oversampling of the temperature und pressure is set as written in the
datasheet of the BME280.
Furthermore proper error detection is added in case a skipped value is read
from the device. This is done also for pressure and temperature reading.
Especially it don't make sense to compensate this value and treat it as
regular value.
Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Jonathan writes:
First set of IIO fixes for the 4.13 cycle.
* ad2s1210
- Fix negative angular velocity reads (identified by a gcc 7 warning)
* aspeed-adc
- Wait for initialization sequence to finish before enabling channels.
Without it no channels work.
* axp288
- Revert a patch that dropped some bogus register mods. No one is entirely
sure why but it breaks charging on some devices.
- Fix GPADC pin read returning 0. Turns out a small sleep is needed.
* bmc150
- Make sure device is restored to normal state after suspend / resume
cycle. Otherwise, simple sysfs reads are broken.
* tsl2563
- fix wrong event code.
* st-accel
- add spi 3-wire support. Needed to fix the lsm303agr accelerometer
which only had 3 wires in all cases. Side effect is to enable optional
3-wire support for other devices.
* st-pressure
- disable multiread by default for LPS22HB (only effects SPI)
* sun4i-gpadc-iio
- fix unbalanced irq enable / disable
* vf610
- Fix VALT slection for REFSEL bits - ensures we are using the
right reference pins.
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