kernel/linux.git/drivers/counter/Kconfig, branch v5.15.7

counter: Add support for Intel Quadrature Encoder Peripheral

2021-06-03T17:24:14+00:00

Add support for Intel Quadrature Encoder Peripheral found on Intel Elkhart Lake platform. Initial implementation was done by Felipe Balbi while he was working at Intel with later changes from Raymond Tan and me. Co-developed-by: Felipe Balbi (Intel) Signed-off-by: Felipe Balbi (Intel) Co-developed-by: Raymond Tan Signed-off-by: Raymond Tan Signed-off-by: Jarkko Nikula Acked-by: William Breathitt Gray Link: https://lore.kernel.org/r/20210602113259.158674-1-jarkko.nikula@linux.intel.com Signed-off-by: Jonathan Cameron

counter: add IRQ or GPIO based counter

2021-03-25T19:13:51+00:00

Add simple IRQ or GPIO base counter. This device is used to measure rotation speed of some agricultural devices, so no high frequency on the counter pin is expected. The maximal measurement frequency depends on the CPU and system load. On the idle iMX6S I was able to measure up to 20kHz without count drops. Signed-off-by: Oleksij Rempel Reviewed-by: Ahmad Fatoum Reviewed-by: William Breathitt Gray Link: https://lore.kernel.org/r/20210301080401.22190-3-o.rempel@pengutronix.de Signed-off-by: Jonathan Cameron

counter: 104-quad-8: Remove IIO counter ABI

2021-03-11T20:46:56+00:00

The IIO counter driver has been superseded by the Counter subsystem as discussed in [1]. This patch removes the IIO counter ABI from the 104-QUAD-8 driver. [1] https://lore.kernel.org/lkml/20210119104105.000010df@Huawei.com/ Cc: Syed Nayyar Waris Signed-off-by: William Breathitt Gray Link: https://lore.kernel.org/r/98a39983d5df761c058a469d1346fd8ffdef8516.1611973018.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: stm32-lptimer-cnt: remove iio counter abi

2021-03-11T20:46:56+00:00

Currently, the STM32 LP Timer counter driver registers into both IIO and counter subsystems, which is redundant. Remove the IIO counter ABI and IIO registration from the STM32 LP Timer counter driver since it's been superseded by the Counter subsystem as discussed in [1]. Keep only the counter subsystem related part. Move a part of the ABI documentation into a driver comment. This also removes a duplicate ABI warning $ scripts/get_abi.pl validate ... /sys/bus/iio/devices/iio:deviceX/in_count0_preset is defined 2 times: ./Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:100 ./Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:0 [1] https://lkml.org/lkml/2021/1/19/347 Acked-by: William Breathitt Gray Signed-off-by: Fabrice Gasnier Link: https://lore.kernel.org/r/1611926542-2490-1-git-send-email-fabrice.gasnier@foss.st.com Signed-off-by: Jonathan Cameron

counter: Add microchip TCB capture counter

2020-07-20T12:04:40+00:00

This drivers allows to use the capture mode of the Timer Counter Block hardware block available in Microchip SoCs through the counter subsystem. Two functions of the counter are supported for the moment: period capture and quadrature decoder. The latter is only supported by the SAMA5 series of SoCs. For the period capture mode a basic setup has been chosen that will reset the counter each time the period is actually reached. Of course the device offers much more possibilities. For quadrature mode, both channel 0 and 1 must be configured even if we only capture the position (no revolution/rotation). Signed-off-by: Kamel Bouhara Signed-off-by: Jonathan Cameron

counter: new TI eQEP driver

2019-10-17T20:53:49+00:00

This adds a new counter driver for the Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP) module. Only very basic functionality is currently implemented - only enough to be able to read the position. The actual device has many more features which can be added to the driver on an as-needed basis. It is not possible to read the QEPA/B signal values in hardware, so that feature is omitted. The TI_PWMSS kernel option is selected in Kconfig to enable the parent bus, which is needed for power management. Signed-off-by: David Lechner Signed-off-by: Jonathan Cameron

Merge tag 'iio-fixes-for-5.2b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

2019-06-17T20:28:29+00:00

Jonathan writes: Second set of IIO fixes for the 5.2 cycle. * ad7150 - sense of bit for controlling adaptive vs fixed threshold was flipped. * adt7316 - Fix a build issue due to wrong headers for gpio usage. * lsm6dsx - correctly suspend / resume i2c slaves when the host goes to sleep. * mlx90632 - relax a compatability check to allow for newer devices. Also one counters fix * counter/ftm-quaddec - missing dependencies in Kconfig. * tag 'iio-fixes-for-5.2b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: counter/ftm-quaddec: Add missing dependencies in Kconfig staging: iio: adt7316: Fix build errors when GPIOLIB is not set iio: temperature: mlx90632 Relax the compatibility check iio: imu: st_lsm6dsx: fix PM support for st_lsm6dsx i2c controller staging:iio:ad7150: fix threshold mode config bit

counter/ftm-quaddec: Add missing dependencies in Kconfig

2019-06-08T12:07:41+00:00

This driver uses devm_ioremap and of* functions. This fixes a linking failure with e.g. ARCH=um. Reported-by: kbuild test robot Signed-off-by: Patrick Havelange Fixes: a3b9a99 ("counter: add FlexTimer Module Quadrature decoder counter driver") Signed-off-by: William Breathitt Gray Signed-off-by: Jonathan Cameron

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

counter: add FlexTimer Module Quadrature decoder counter driver

2019-04-25T19:33:41+00:00

This driver exposes the counter for the quadrature decoder of the FlexTimer Module, present in the LS1021A soc. Signed-off-by: Patrick Havelange Signed-off-by: William Breathitt Gray Signed-off-by: Greg Kroah-Hartman