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2021-06-13counter: interrupt-cnt: Add const qualifier for actions_list arrayWilliam Breathitt Gray1-3/+3
The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch renames interrupt_cnt_synapse_actionss to interrupt_cnt_synapse_actions and adds a const qualifier to match actions_list. Cc: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Reviewed-by: <o.rempel@pengutronix.de> Link: https://lore.kernel.org/r/20210610013642.149961-1-vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-13counter: intel-qep: Use to_pci_dev() helperJarkko Nikula1-2/+2
Use to_pci_dev() helper instead of container_of(d, struct pci_dev, dev); Suggested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20210611115558.796338-2-jarkko.nikula@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-13counter: intel-qep: Mark PM callbacks with __maybe_unusedJarkko Nikula1-4/+2
Remove CONFIG_PM ifdef and mark PM callbacks with __maybe_unused. Suggested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20210611115558.796338-1-jarkko.nikula@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: stm32-timer-cnt: Add const qualifier for actions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch adds the const qualifier to the stm32_synapse_actions to match actions_list. Cc: Benjamin Gaignard <benjamin.gaignard@st.com> Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/9675edda958ee2ca371d271f46445d3e1934ba82.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: stm32-lptimer-cnt: Add const qualifier for actions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch adds the const qualifier to the stm32_lptim_cnt_synapse_actions to match actions_list. Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/785e0daa3633923ede42394f423fcf94c4469154.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: microchip-tcb-capture: Add const qualifier for actions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch adds the const qualifier to the mchp_tc_synapse_actions to match actions_list. Cc: Kamel Bouhara <kamel.bouhara@bootlin.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/165f9682ce308a60a477aaa56fdae7bc949dc218.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: ftm-quaddec: Add const qualifier for actions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch adds the const qualifier to the ftm_quaddec_synapse_actions to match actions_list. Cc: Patrick Havelange <patrick.havelange@essensium.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/db1df2021efb1b98e6d1a50787be5a52a1896574.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: 104-quad-8: Add const qualifier for actions_list arrayWilliam Breathitt Gray1-2/+2
The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch adds the const qualifier to the quad8_index_actions_list and quad8_synapse_actions_list to match actions_list. Acked-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/776ba3ad0a3c609d3600cffe0ed6446baf29fee9.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: stm32-timer-cnt: Add const qualifier for functions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_count functions_list member expects a const enum counter_count_function array. This patch adds the const qualifier to the stm32_count_functions to match functions_list. Cc: Benjamin Gaignard <benjamin.gaignard@st.com> Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/46a1e7096dd9280d8f241894186b3c903956a55f.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: stm32-lptimer-cnt: Add const qualifier for functions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_count functions_list member expects a const enum counter_count_function array. This patch adds the const qualifier to the stm32_lptim_cnt_functions to match functions_list. Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/08830119594acdb3bc9d36ae2e65b2eb26589ade.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: microchip-tcb-capture: Add const qualifier for functions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_count functions_list member expects a const enum counter_count_function array. This patch adds the const qualifier to the mchp_tc_count_functions to match functions_list. Cc: Kamel Bouhara <kamel.bouhara@bootlin.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/74cb91ab7b459563762ec28633cd8808093aa2ad.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: interrupt-cnt: Add const qualifier for functions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_count functions_list member expects a const enum counter_count_function array. This patch adds the const qualifier to the interrupt__cnt_functions to match functions_list. Cc: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/86f7fb77f703cf2508a6b4ee9cf80aa523392976.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: 104-quad-8: Add const qualifier for functions_list arrayWilliam Breathitt Gray1-1/+1
The struct counter_count functions_list member expects a const enum counter_count_function array. This patch adds the const qualifier to the quad8_count_functions_list to match functions_list. Acked-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/6847da7553208e7f2554e6c7688e2021f7e19716.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: 104-quad-8: Add const qualifiers for quad8_preset_register_setWilliam Breathitt Gray1-2/+2
Add some safety by qualifying the quad8_preset_register_set() function parameters as const. Acked-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/050f1b518eeae8e3683f7d6d11f3219a137adf48.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: 104-quad-8: Annotate hardware config module parameterWilliam Breathitt Gray1-1/+1
When the kernel is running in secure boot mode, we lock down the kernel to prevent userspace from modifying the running kernel image. Whilst this includes prohibiting access to things like /dev/mem, it must also prevent access by means of configuring driver modules in such a way as to cause a device to access or modify the kernel image. To this end, annotate module_param* statements that refer to hardware configuration and indicate for future reference what type of parameter they specify. The parameter parser in the core sees this information and can skip such parameters with an error message if the kernel is locked down. The module initialisation then runs as normal, but just sees whatever the default values for those parameters is. Note that we do still need to do the module initialisation because some drivers have viable defaults set in case parameters aren't specified and some drivers support automatic configuration (e.g. PNP or PCI) in addition to manually coded parameters. This patch annotates the 104-QUAD-8 driver. Acked-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/97ce79878a26809f0b15b2eac9a86ca39e0ecd74.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-09counter: 104-quad-8: Remove pointless commentWilliam Breathitt Gray1-1/+0
It is obvious that devm_counter_register() is used to register a Counter device, so a comment stating such is pointless here. Acked-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/77e9f3daa091d0ad0ee56b8973705dd03db85dd4.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-03counter: Add support for Intel Quadrature Encoder PeripheralJarkko Nikula3-0/+557
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) <balbi@kernel.org> Signed-off-by: Felipe Balbi (Intel) <balbi@kernel.org> Co-developed-by: Raymond Tan <raymond.tan@intel.com> Signed-off-by: Raymond Tan <raymond.tan@intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20210602113259.158674-1-jarkko.nikula@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-03-26Merge tag 'iio-for-5.13a' of ↵Greg Kroah-Hartman5-852/+357
https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: 1st set of IIO/counter device support, features and cleanup in the 5.13 cycle Big set in here from Alexandru Ardelean enabling multiple buffer support. This includes providing a new directory per buffer that combines what was previously in buffer/ and scan_elements/. Old interfaces still in place for compatiblity. Note immuatable branch for scmi patches to allow for some significant rework going on in that subsystem. Merge required updating to reflect some changes in IIO. Late rebase to fix some wrong fixes tags due to some earlier rebases made necessary by messing up the immutable branch. IIO New Device Support * adi,ad5686 - Add info to support AD5673R and AD5677R * bosch,bmi088 - New driver supporting this accelerometer + gyroscope * cros_ec_mkbp - New driver for this proximity sensor that exposes a 'front' sensor. Very simple switch like device, but driver allows it to share interface with more sophisticated proximity sensors. * iio_scmi - New driver to support ARM SCMI protocol to expose underlying accelerometers and gyroscopes via this firmware interface. * st,st_magn - Add ID for IISMDC magnetometer. * ti,ads131e0 - New driver supporting ads131e04, ads131e06 and ads131e08 24 bit ADCs Counter New Device Support * IRQ or GPIO based counter - New driver for a conceptually simple counter that uses interrupts to perform the count. Features * core - Dual buffer supprt including: Various helpers to centralize handling of bufferer related elements. Document existing and new IOCTLs Register the IIO chrdev only if it can actually be used for anything. Rework attribute group creation in the core (lots of patches) Merge buffer/ and scan_elements/ entries into one list + maintain backwards compatible set. Introduce the internal logic and IOCTL to allow multiple buffers + access to an anon FD per buffer to actually read from it. Tidy up tools/iio/iio_generic_buffer and switch to new interfaces. Update ABI docs. A few follow up fixes, unsuprising as this was a huge bit of rework. - Move common case setting of trig->parent to the core. - Provide an iio_read_channel_processed_scale() to avoid loss of precision from iio_read_channel_processed() then applying integer scale. Use it in ntc_thermistor driver in hwmon. - Allow drivers to specify labels from elsewhere than DT. Use it for bmc150 and kxcjk-1013 labels related to position on 2 in one tablets. - Document label usage for proximity and accelerometer sensors. - Some local variable renames for consistency tools - Add -a parameter to iio_event_monitor to allow autoenabling of events. * acpi_als - Add trigger support for devices that don't support notification method. * adi,ad7124 - Allow more than 8 channels. This is a complex little device, but is capable of supporting up to 16 channels if the share certain configuration settings. * hrtimer-trigger - Support sampling frequency below 1Hz. * mediatek,mt8195-auxadc - Add compatible to binding docs (always also includes mt8173) * st,stm32-adc - Enable timetamps when not using DMA. * vishay,vcnl3020 - Sampling frequency control. Cleanup and minor fixes: * treewide - Use some getter and setter functions instead of opencoding. - Set of fixes for pointless casts in various drivers. - Avoid wrong kernel-doc marking on comment blocks. - Fix various other minor kernel-doc issues shown by W=1 * core - Use a signed temporary for IIO_VAL_FRACTIONAL_LOG2 to avoid odd casts. - Fix IIO_VAL_FRACTIONAL_LOG2 for values between -1.0 and 0.0 - Add unit tests for iio_format_value() * docs - Fix formatting/typos in iio_configfs.rst and buffers.rst - Add documentation of index in buffers.rst - Fix scan element description - Avoid some issues with HTML generation from ABI docs by moving duplicated defintions to more generic files. - Drop reference to long dead mailing list. * 104-quad - Remove left over deprecated IIO counter ABI. * adi,adi-axi-adc - Fix wrong bit of docs. * adi,ad5791 - Typos * adi,ad9834 - Switch to device managed functions in probe. * adi,adis* - Add and use helpers for locking to reduced duplication. * adi,adis16480 - Fix calculation of sampling frequency when using pulse per second input. * adi,adis16475 - Calculate the IMU scaled internal sampling rate and runtime depending on sysfs based configuration rather than getting from DT. Drop now unnecessary property from DT bindings doc. * cros_ec - Fix result of a series of recent changes that means extended buffer attributes turn up in the wrong place. Too complex to revert the various patches unfortunately so this is a bit messy. * fsl,mma3452 - Indentation cleanup. * hid-sensors - Size of storage needs to increase for some parts when using quaternions. - Move the get sensistivity attribute to hid-sensors-common to reduce duplication. Enable it for more device types. - Correctly handle relative sensitivity if reported that way including documenting the new ABI. * maxim,max517 - Use device managed functions in probe. * mediatek,mt6360-adc - Use asm/unaligned.h instead of directly including unaligned/be_byteshift.h * novuton,npcm-adc - Local lock instead of missusing mlock. * semtech,sx9500 - Typos * st,sensor - typo fix * st,spear-adc - Local lock instead of missusing mlock. * st,stm32-adc - Long standing HAS_IOMEM dependency fix. * st,stm32-counter - Remove left over deprecated IIO counter ABI. * ti,palmas-adc - Local lock instead of missusing mlock. * ti,tmp007 - Switch to device managed functions in probe. Other * MAINTAINERS - Move Peter Meerwald-Stadler to Credits at his request * tag 'iio-for-5.13a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (119 commits) iio: acpi_als: Add trigger support iio: acpi_als: Add local variable dev in probe iio: acpi_als: Add timestamp channel iio: adc: ad7292: Modify the bool initialization assignment iio: cros: unify hw fifo attributes without API changes iio: kfifo: add devm_iio_triggered_buffer_setup_ext variant iio: event_monitor: Enable events before monitoring dt-bindings: iio: adc: Add compatible for Mediatek MT8195 iio:magnetometer: Add Support for ST IIS2MDC dt-bindings: iio: st,st-sensors add IIS2MDC. staging: iio: ad9832: kernel-doc fixes iio:dac:max517.c: Use devm_iio_device_register() iio:cros_ec_sensors: Fix a wrong function name in kernel doc. iio: buffer: kfifo_buf: kernel-doc, typo in function name. iio: accel: sca3000: kernel-doc fixes. Missing - and wrong function names. iio: adc: adi-axi-adc: Drop false marking for kernel-doc iio: adc: cpcap-adc: kernel-doc fix - that should be _ in structure name iio: dac: ad5504: fix wrong part number in kernel-doc structure name. iio: dac: ad5770r: kernel-doc fix case of letter R wrong in structure name iio: adc: ti-adc084s021: kernel-doc fixes, missing function names ...
2021-03-25counter: add IRQ or GPIO based counterOleksij Rempel3-0/+255
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 <o.rempel@pengutronix.de> Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Reviewed-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20210301080401.22190-3-o.rempel@pengutronix.de Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-03-11counter: 104-quad-8: Remove IIO counter ABIWilliam Breathitt Gray2-590/+65
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 <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/98a39983d5df761c058a469d1346fd8ffdef8516.1611973018.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-03-11counter: stm32-lptimer-cnt: remove iio counter abiFabrice Gasnier2-262/+37
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 <vilhelm.gray@gmail.com> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Link: https://lore.kernel.org/r/1611926542-2490-1-git-send-email-fabrice.gasnier@foss.st.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-03-06counter: stm32-timer-cnt: fix ceiling miss-alignment with reload registerFabrice Gasnier1-8/+3
Ceiling value may be miss-aligned with what's actually configured into the ARR register. This is seen after probe as currently the ARR value is zero, whereas ceiling value is set to the maximum. So: - reading ceiling reports zero - in case the counter gets enabled without any prior configuration, it won't count. - in case the function gets set by the user 1st, (priv->ceiling) is used. Fix it by getting rid of the cached "priv->ceiling" variable. Rather use the ARR register value directly by using regmap read or write when needed. There should be no drawback on performance as priv->ceiling isn't used in performance critical path. There's also no point in writing ARR while setting function (sms), so it can be safely removed. Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Suggested-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: <Stable@vger.kernel.org> Link: https://lore.kernel.org/r/1614793789-10346-1-git-send-email-fabrice.gasnier@foss.st.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-03-06counter: stm32-timer-cnt: fix ceiling write max valueFabrice Gasnier1-0/+5
The ceiling value isn't checked before writing it into registers. The user could write a value higher than the counter resolution (e.g. 16 or 32 bits indicated by max_arr). This makes most significant bits to be truncated. Fix it by checking the max_arr to report a range error [1] to the user. [1] https://lkml.org/lkml/2021/2/12/358 Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: <Stable@vger.kernel.org> Link: https://lore.kernel.org/r/1614696235-24088-1-git-send-email-fabrice.gasnier@foss.st.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-02-27counter: stm32-timer-cnt: Report count function when SLAVE_MODE_DISABLEDWilliam Breathitt Gray1-14/+25
When in SLAVE_MODE_DISABLED mode, the count still increases if the counter is enabled because an internal clock is used. This patch fixes the stm32_count_function_get() and stm32_count_function_set() functions to properly handle this behavior. Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Cc: Fabrice Gasnier <fabrice.gasnier@st.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Link: https://lore.kernel.org/r/20210226012931.161429-1-vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-01-14counter:ti-eqep: remove floorDavid Lechner1-35/+0
The hardware doesn't support this. QPOSINIT is an initialization value that is triggered by other things. When the counter overflows, it always wraps around to zero. Fixes: f213729f6796 "counter: new TI eQEP driver" Signed-off-by: David Lechner <david@lechnology.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20201214000927.1793062-1-david@lechnology.com Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-12-03counter: microchip-tcb-capture: Fix CMR value checkWilliam Breathitt Gray1-6/+10
The ATMEL_TC_ETRGEDG_* defines are not masks but rather possible values for CMR. This patch fixes the action_get() callback to properly check for these values rather than mask them. Fixes: 106b104137fd ("counter: Add microchip TCB capture counter") Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Kamel Bouhara <kamel.bouhara@bootlin.com> Cc: <Stable@vger.kernel.org> Link: https://lore.kernel.org/r/20201114232805.253108-1-vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-11-01counter/ti-eqep: Fix regmap max_registerDavid Lechner1-2/+2
The values given were the offset of the register after the last register instead of the actual last register in each range. Fix by using the correct last register of each range. Fixes: f213729f6796 ("counter: new TI eQEP driver") Signed-off-by: David Lechner <david@lechnology.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20201025165122.607866-1-david@lechnology.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-09-29counter: use semicolons rather than commas to separate statementsJulia Lawall1-1/+1
Replace commas with semicolons. What is done is essentially described by the following Coccinelle semantic patch (http://coccinelle.lip6.fr/): // <smpl> @@ expression e1,e2; @@ e1 -, +; e2 ... when any // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Reviewed-by: David Lechner <david@lechnology.com> Link: https://lore.kernel.org/r/1601233948-11629-16-git-send-email-Julia.Lawall@inria.fr Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-09-23counter: microchip-tcb-capture: Constify mchp_tc_opsRikard Falkeborn1-1/+1
The only usage of mchp_tc_ops is to assign its address to the ops field in the counter_device struct which is a const pointer. Make it const to allow the compiler to put it in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Link: https://lore.kernel.org/r/20200922201941.41328-1-rikard.falkeborn@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-08-22counter: microchip-tcb-capture: check the correct variableDan Carpenter1-2/+2
This should be testing "regmap" instead of "priv->regmap". The "priv->regmap" variable is always zero so it's not an error pointer. Fixes: 106b104137fd ("counter: Add microchip TCB capture counter") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-07-22Merge branch 'ib-5.8-tcb' into HEADJonathan Cameron3-0/+409
Series needed as base for a clocksource tree hence immutable branch
2020-07-20counter: Add microchip TCB capture counterKamel Bouhara3-0/+409
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 <kamel.bouhara@bootlin.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-07-20Merge 5.8-rc6 into staging-nextGreg Kroah-Hartman1-3/+19
We need the staging fixes in here, and it resolves a merge issue with an iio driver. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-14counter: 104-quad-8: Add lock guards - filter clock prescalerSyed Nayyar Waris1-0/+4
Add lock protection from race conditions to the 104-quad-8 counter driver for filter clock prescaler code changes. Mutex calls used for protection. Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com> Fixes: de65d0556343 ("counter: 104-quad-8: Support Filter Clock Prescaler") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14counter: 104-quad-8: Add lock guards - differential encoderSyed Nayyar Waris1-3/+15
Add lock protection from race conditions to 104-quad-8 counter driver for differential encoder status code changes. Mutex lock calls used for protection. Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com> Fixes: 954ab5cc5f3e ("counter: 104-quad-8: Support Differential Encoder Cable Status") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14iio: remove explicit IIO device parent assignmentAlexandru Ardelean2-2/+0
This patch applies the semantic patch: @@ expression I, P, SP; @@ I = devm_iio_device_alloc(P, SP); ... - I->dev.parent = P; It updates 302 files and does 307 deletions. This semantic patch also removes some comments like '/* Establish that the iio_dev is a child of the i2c device */' But this is is only done in case where the block is left empty. The patch does not seem to cover all cases. It looks like in some cases a different variable is used in some cases to assign the parent, but it points to the same reference. In other cases, the block covered by ... may be just too big to be covered by the semantic patch. However, this looks pretty good as well, as it does cover a big bulk of the drivers that should remove the parent assignment. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-04-19counter: 104-quad-8: Add lock guards - generic interfaceSyed Nayyar Waris1-34/+160
Add lock protection from race conditions to 104-quad-8 counter driver generic interface code changes. Mutex calls used for protection. Fixes: f1d8a071d45b ("counter: 104-quad-8: Add Generic Counter interface support") Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-03-08counter: 104-quad-8: Support Differential Encoder Cable StatusWilliam Breathitt Gray1-0/+75
The ACCES 104-QUAD-8 series provides status information about the connection state of the differential encoder cable inputs. This patch implements support to expose such information from these devices. Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-03-08counter: 104-quad-8: Support Filter Clock PrescalerWilliam Breathitt Gray1-3/+58
The ACCES 104-QUAD-8 series does active filtering on the quadrature input signals via the PC/104 bus clock (OSC 14.318 MHz). This patch exposes the filter clock prescaler available on each channel. Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-02-21counter: stm32-timer-cnt: remove iio headersFabrice Gasnier1-2/+1
The stm32-timer-cnt driver doesn't use the iio interface. The iio headers aren't relevant and can be removed as reported by William in [1]. With this change, mod_devicetable.h needs to be added to define the 'of_device_id' struct. [1] https://lkml.org/lkml/2020/2/10/1516 Reported-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-02-21counter: stm32-timer-cnt: add power management supportFabrice Gasnier1-0/+63
Add suspend/resume PM sleep ops. When going to low power, enforce the counter isn't active. Gracefully restore its state upon resume in case it's been left enabled prior to suspend. Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-18counter: Simplify the count_read and count_write callbacksWilliam Breathitt Gray6-147/+42
The count_read and count_write callbacks are simplified to pass val as unsigned long rather than as an opaque data structure. The opaque counter_count_read_value and counter_count_write_value structures, counter_count_value_type enum, and relevant counter_count_read_value_set and counter_count_write_value_get functions, are removed as they are no longer used. Cc: Patrick Havelange <patrick.havelange@essensium.com> Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: David Lechner <david@lechnology.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-18Merge branch 'ib-ti-eqep-5.4-rc1' into togregJonathan Cameron3-0/+485
Immutable branch being merged in. Created as this also involves moving some dependencies around, outside of the counter subsystem. It's possible it will want to be pulled into other trees.
2019-10-17counter: new TI eQEP driverDavid Lechner3-0/+485
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 <david@lechnology.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-07counter: stm32: clean up indentation issueColin Ian King1-2/+2
There is an if statement that is indented one level too deeply, remove the extraneous tabs. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-05counter: stm32-lptimer-cnt: fix a kernel-doc warningFabrice Gasnier1-1/+1
Fix the following warnings when documentation is built: drivers/counter/stm32-lptimer-cnt.c:354: warning: cannot understand function prototype: 'enum stm32_lptim_cnt_function' Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Fixes: 597f55e3f36c ("counter: stm32-lptimer: add counter device") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-05counter: stm32-timer-cnt: fix a kernel-doc warningFabrice Gasnier1-1/+1
Fix the following warning when documentation is built: drivers/counter/stm32-timer-cnt.c:37: warning: cannot understand function prototype: 'enum stm32_count_function' Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-07-28counter/ftm-quaddec: Use device-managed registration APIChuhong Yuan1-18/+12
Make use of devm_counter_register. Then we can remove redundant unregistration API usage to make code simpler. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-07-12Merge tag 'staging-5.3-rc1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging and IIO driver updates from Greg KH: "Here is the big Staging and IIO driver update for 5.3-rc1. Lots of new IIO drivers are in here, along with loads of tiny staging driver cleanups and fixes. Overall we almost break even with the same lines added as removed. Full details are in the shortlog, they are too large to list here. All of these changes have been in linux-next for a while with no reported issues" * tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (608 commits) staging: kpc2000: simplify comparison to NULL in fileops.c staging: kpc2000: simplify comparison to NULL in dma.c staging: kpc2000: simplify comparison to NULL in kpc2000_spi.c staging: rtl8723bs: hal: remove redundant assignment to packetType staging: rtl8723bs: Change return type of hal_btcoex_IsBtDisabled() staging: rtl8723bs: Remove rtw_btcoex_DisplayBtCoexInfo() staging: rtl8723bs: Remove function rtw_btcoex_GetDBG() staging: rtl8723bs: Remove function rtw_btcoex_SetDBG() staging: rtl8723bs: Remove rtw_btcoex_IsBTCoexCtrlAMPDUSize() staging: rtl8723bs: Remove rtw_btcoex_BtInfoNotify() staging: rtl8723bs: Remove rtw_btcoex_ScanNotify() staging: rtl8723bs: Remove rtw_btcoex_SetSingleAntPath() staging: rtl8723bs: Remove rtw_btcoex_SetPGAntNum() staging: rtl8192e: remove redundant initialization of rtstatus staging: rtl8723bs: Remove rtw_btcoex_GetRaMask() staging: rtl8723bs: Remove rtw_btcoex_SetChipType() staging: rtl8723bs: Remove rtw_btcoex_ConnectNotify() staging: rtl8723bs: Remove rtw_btcoex_SetBTCoexist() staging: rtl8723bs: Remove rtw_btcoex_IsBtDisabled() staging: rtl8723bs: Remove rtw_btcoex_IsBtControlLps() ...
2019-07-01Merge tag 'iio-for-5.3b' of ↵Greg Kroah-Hartman1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: Second set of IIO device support, features, cleanups and minor fixes for 5.3. A few bits for the counters subsystem mixed in here as well. There are some late breaking fixes as well, which aren't so urgent they can't wait for the merge window. New Device Support * adf4371 - New driver + bindings. - Support the adf4372 PLL. Mostly ID and bindings. * ad8366 (note includes rework of driver needed to allow support for these). - Support the ADL5240 variable gain amplifier (VGA). - Support the ADA4961 digital gain amplifier (DGA). * dps310 - New driver, in several parts from different authors for this temp and pressure sensor. - Includes errata workaround for a temperature reading issue. * stk3310 - Support the stk3335, mostly ID. Features and cleanups * core - drop error handling on debugfs registration. - harden by making sure we don't overrun iio_chan_info_postfix. * docs - convert remaining docs to rst. At somepoint we'll fit these few into the main IIO docs. - improve sampling_frequency_available docs but explaining the range form. * ad_sigma_delta - Drop a pointless goto. * ad2s1210 - Drop pointless platform data null check seeing as we don't actually use platform data anymore. * ad7124 - Relax limitation on channel numbers to allow pseudo different channels. - Support control of whether the input is buffered via DT. - Use dynamic allocation for channel configuration to make it easier to support new devices. - YAML binding conversion. * ad7150 - Comment tidy up. - Consistent and simple if (ret) handling of i2c errors. - FIELD_GET and GENMASK. - Ternary rather than !!(condition) for readability. - Use macros to avoid repetition of channel definitions. * ad7606 - Add software channel config (rather that pin controlled) - Refactor to simplify addition of new part in future. * ad7746 - of_deivce_id table. * ad7780 - MAINTAINERS entry - YAML DT bindings. * ad8366 - Stop using core mlock in favour of well scoped local lock. - SPDX + copyright date update. * ad9834 - of_device_id table * adf4371 - Add support for output stage muting before lock on has occured. * adis library - MAINTAINERS entry to reflect that this now Alexandru's problem ;) * adis162xx: - Fix a slightly incorrect set of comments and print statements on minimum supported voltage. * adis16203 - of_device_id table. * adis16240 - Add of_device_id table (in two parts as first patch only used it for MODULE_DEVICE_TABLE.) * adt7316-spi - of_device_id table * adxl372 - YAML DT binding conversion. - Cleanup use of buffer callback functions (precursor to core rework). * bh1710 - Simplify getting the i2c adapter from the client. * dht11 - Mote to newer GPIO consumer interface. * kxcjk-1013.c - Add binding for sensor in display of some ultrabooks after userspace tools updated for it not be a problem to report two similar sensors. * imx7d - drop unused variables. - white space - define instead of variable for clock frequency that is fixed. - drop pointless error message. * messon_saradc - SPDX * sps30 - MAINTAINERS entry - YAML binding conversion. * st_accel - Tidy up ordering in various buffer related callbacks. This is part of a long running effort to simplify the core code. * stm32-dfsdm: - Manage the resolution cleanly in triggerd modes. - Add fast mode support which allows more flexible filter choices. - Add a comment on the reason for a 16 bit record when technically not 'required'. * st_lsm6dsx - Embed device name in the sensor_settings struct as i3c doesn't have a convenient name field to use for this. * xilinx-adc - Relax constraints on supported platforms to reflect that this can used with FPGAs on PCIe cards and hence many architectures. * counters/ftm-quaddec - Fix some formatting io MODULE_AUTHOR - MAINTAINERS entry Fixes * tools - fix incorrect handling of 32 bit channels. * sca3000 - Potential endian bug that is unlikely to bite anyone (be64 host seems unlikely for this old part). * stm32-adc - Add vdda-supply. On some boards it needs to be turned on to supply the ADC. DT bindings included. * stm32-dfsdm - Fix output resolution to work with filter orders other than 3. - Fix output datatype as it's signed and previously claimed not to be. * tag 'iio-for-5.3b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (68 commits) iio: iio-utils: Fix possible incorrect mask calculation iio: frequency: adf4371: Add support for output stage mute dt-bindings: iio: frequency: Add ADF4372 PLL documentation iio: frequency: adf4371: Add support for ADF4372 PLL dt-bindings: iio: adc: Add buffered input property Convert AD7124 bindings documentation to YAML format. iio: adc: ad7124: Shift to dynamic allocation for channel configuration iio: adc: ad7124: Add buffered input support iio: adc: ad7124: Remove input number limitation MAINTAINERS: add ADIS IMU driver library entry iio: adis162xx: fix low-power docs & reports counter/ftm-quaddec: Add missing '>' in MODULE_AUTHOR iio: core: no need to check return value of debugfs_create functions docs: iio: convert to ReST iio: adc: stm32-adc: add missing vdda-supply dt-bindings: iio: adc: stm32: add missing vdda supply iio: adc: stm32-dfsdm: add comment for 16 bits record iio: adc: stm32-dfsdm: add fast mode support iio: adc: stm32-dfsdm: manage data resolution in trigger mode iio: adc: stm32-dfsdm: fix data type ...
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