counter: ti-eqep: Allow eQEP driver to be built for K3 devices

TI K3 SoC's support eQEP hardware, so add ARCH_K3 to the depends
so the TI eQEP driver can be built for K3 devices.

Signed-off-by: Jud

counter: ti-eqep: Allow eQEP driver to be built for K3 devices

TI K3 SoC's support eQEP hardware, so add ARCH_K3 to the depends
so the TI eQEP driver can be built for K3 devices.

Signed-off-by: Judith Mendez <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: William Breathitt Gray <[email protected]>

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mfd: rz-mtu3: Link time dependencies

The new set of drivers for RZ/G2L MTU3a tries to enable compile-testing the
individual client drivers even when the MFD portion is disabled but gets it
wrong, ca

mfd: rz-mtu3: Link time dependencies

The new set of drivers for RZ/G2L MTU3a tries to enable compile-testing the
individual client drivers even when the MFD portion is disabled but gets it
wrong, causing a link failure when the core is in a loadable module but the
other drivers are built-in:

x86_64-linux-ld: drivers/pwm/pwm-rz-mtu3.o: in function `rz_mtu3_pwm_apply':
pwm-rz-mtu3.c:(.text+0x4bf): undefined reference to `rz_mtu3_8bit_ch_write'
x86_64-linux-ld: pwm-rz-mtu3.c:(.text+0x509): undefined reference to `rz_mtu3_disable'

arm-linux-gnueabi-ld: drivers/counter/rz-mtu3-cnt.o: in function `rz_mtu3_cascade_counts_enable_get':
rz-mtu3-cnt.c:(.text+0xbec): undefined reference to `rz_mtu3_shared_reg_read'

It seems better not to add the extra complexity here but instead just use
a normal hard dependency, so remove the #else portion in the header along
with the "|| COMPILE_TEST". This could also be fixed by having slightly more
elaborate Kconfig dependencies or using the cursed 'IS_REACHABLE()' helper,
but in practice it's already possible to compile-test all these drivers
by enabling the mtd portion.

Fixes: 254d3a727421c ("pwm: Add Renesas RZ/G2L MTU3a PWM driver")
Fixes: 0be8907359df4 ("counter: Add Renesas RZ/G2L MTU3a counter driver")
Fixes: 654c293e1687b ("mfd: Add Renesas RZ/G2L MTU3a core driver")
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Thierry Reding <[email protected]>
Reviewed-by: Biju Das <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

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counter: Fix menuconfig "Counter support" submenu entries disappearance

The current placement of the I8254 Kconfig entry results in the
disappearance of the "Counter support" submenu items in menuco

counter: Fix menuconfig "Counter support" submenu entries disappearance

The current placement of the I8254 Kconfig entry results in the
disappearance of the "Counter support" submenu items in menuconfig. Move
the I8254 above the menuconfig COUNTER entry to restore the intended
submenu behavior.

Fixes: d428487471ba ("counter: i8254: Introduce the Intel 8254 interface library module")
Reported-by: Jarkko Nikula <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Reviewed-by: Randy Dunlap <[email protected]>
Tested-by: Jarkko Nikula <[email protected]>
Reviewed-by: Jarkko Nikula <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: Fix menuconfig "Counter support" submenu entries disappearance

The current placement of the I8254 Kconfig entry results in the
disappearance of the "Counter support" submenu items in menuco

counter: Fix menuconfig "Counter support" submenu entries disappearance

The current placement of the I8254 Kconfig entry results in the
disappearance of the "Counter support" submenu items in menuconfig. Move
the I8254 above the menuconfig COUNTER entry to restore the intended
submenu behavior.

Fixes: d428487471ba ("counter: i8254: Introduce the Intel 8254 interface library module")
Reported-by: Jarkko Nikula <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Reviewed-by: Randy Dunlap <[email protected]>
Tested-by: Jarkko Nikula <[email protected]>
Reviewed-by: Jarkko Nikula <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: i8254: Introduce the Intel 8254 interface library module

Exposes consumer library functions providing support for interfaces
compatible with the venerable Intel 8254 Programmable Interval T

counter: i8254: Introduce the Intel 8254 interface library module

Exposes consumer library functions providing support for interfaces
compatible with the venerable Intel 8254 Programmable Interval Timer
(PIT).

The Intel 8254 PIT first appeared in the early 1980s and was used
initially in IBM PC compatibles. The popularity of the original Intel
825x family of chips led to many subsequent variants and clones of the
interface in various chips and integrated circuits. Although still
popular, interfaces compatible with the Intel 8254 PIT are nowdays
typically found embedded in larger VLSI processing chips and FPGA
components rather than as discrete ICs.

A CONFIG_I8254 Kconfig option is introduced by this patch. Modules
wanting access to these i8254 library functions should select this
Kconfig option, and import the I8254 symbol namespace.

Link: https://lore.kernel.org/r/f6fe32c2db9525d816ab1a01f45abad56c081652.1681665189.git.william.gray@linaro.org/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: add HAS_IOPORT_MAP dependency

The 104_QUAD_8 counter driver uses devm_ioport_map() without depending
on HAS_IOPORT_MAP. This means the driver is not usable on platforms such
as s390 which d

counter: add HAS_IOPORT_MAP dependency

The 104_QUAD_8 counter driver uses devm_ioport_map() without depending
on HAS_IOPORT_MAP. This means the driver is not usable on platforms such
as s390 which do not support I/O port mapping. Add the missing
HAS_IOPORT_MAP dependency to make this explicit.

Co-developed-by: Arnd Bergmann <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Niklas Schnelle <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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counter: 104-quad-8: Migrate to the regmap API

The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly

counter: 104-quad-8: Migrate to the regmap API

The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly in the driver. With regmap we get boundary checks, read-write
permissions, operation synchronization locks, and more for free. Most
important of all, rather than rolling our own we utilize implementations
that are known to work and gain from any future improvements and fixes
that come.

Suggested-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/1f1f7920d2be94aedb6fdf49f429fe6137c8cb24.1681753140.git.william.gray@linaro.org/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: 104-quad-8: Remove reference in Kconfig to 25-bit counter value

Support for 25-bit counter values was removed in commit 4aa3b75c7460
("counter: 104-quad-8: Fix race condition between FLAG a

counter: 104-quad-8: Remove reference in Kconfig to 25-bit counter value

Support for 25-bit counter values was removed in commit 4aa3b75c7460
("counter: 104-quad-8: Fix race condition between FLAG and CNTR reads").
Adjust the Kconfig description of CONFIG_104_QUAD_8 to remove reference
of 25-bit counter values.

Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: Add Renesas RZ/G2L MTU3a counter driver

Add RZ/G2L MTU3a counter driver. This IP supports the following
phase counting modes on MTU1 and MTU2 channels

1) 16-bit phase counting modes on MTU

counter: Add Renesas RZ/G2L MTU3a counter driver

Add RZ/G2L MTU3a counter driver. This IP supports the following
phase counting modes on MTU1 and MTU2 channels

1) 16-bit phase counting modes on MTU1 and MTU2 channels.
2) 32-bit phase counting mode by cascading MTU1 and MTU2 channels.

This patch adds 3 counter value channels.
count0: 16-bit phase counter value channel on MTU1
count1: 16-bit phase counter value channel on MTU2
count2: 32-bit phase counter value channel by cascading
MTU1 and MTU2 channels.

The external input phase clock pin for the counter value channels
are as follows:
count0: "MTCLKA-MTCLKB"
count1: "MTCLKA-MTCLKB" or "MTCLKC-MTCLKD"
count2: "MTCLKA-MTCLKB" or "MTCLKC-MTCLKD"

Use the sysfs variable "external_input_phase_clock_select" to select the
external input phase clock pin and "cascade_counts_enable" to enable/
disable cascading of channels.

Signed-off-by: Biju Das <[email protected]>
Reviewed-by: William Breathitt Gray <[email protected]>
Acked-by: William Breathitt Gray <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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counter: fix dependency references for config MICROCHIP_TCB_CAPTURE

Commit dfeef15e73ca ("counter: microchip-tcp-capture: Add appropriate arch
deps for TCP driver") intends to add appropriate depend

counter: fix dependency references for config MICROCHIP_TCB_CAPTURE

Commit dfeef15e73ca ("counter: microchip-tcp-capture: Add appropriate arch
deps for TCP driver") intends to add appropriate dependencies for the
config MICROCHIP_TCB_CAPTURE. It however prefixes the intended configs with
CONFIG, but in Kconfig files in contrast to source files, the configs are
referenced to without prefixing them with CONFIG.

Fix the dependency references due to this minor misconception.

Fixes: dfeef15e73ca ("counter: microchip-tcp-capture: Add appropriate arch deps for TCP driver")
Signed-off-by: Lukas Bulwahn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: microchip-tcp-capture: Add appropriate arch deps for TCP driver

Add the CONFIG_SOC_AT91SAM9 and CONFIG_SOC_SAM_V7 deps for the
Microchip SoCs that support this IP block/driver plus compile

counter: microchip-tcp-capture: Add appropriate arch deps for TCP driver

Add the CONFIG_SOC_AT91SAM9 and CONFIG_SOC_SAM_V7 deps for the
Microchip SoCs that support this IP block/driver plus compile
time testing.

Signed-off-by: Peter Robinson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: ftm-quaddec: Depend on the Layerscape SoC

At the moment only the Freescale LS1021A is the only HW that
supports this IP block so add an appropriate dependency and
compile test.

Signed-off-

counter: ftm-quaddec: Depend on the Layerscape SoC

At the moment only the Freescale LS1021A is the only HW that
supports this IP block so add an appropriate dependency and
compile test.

Signed-off-by: Peter Robinson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: intel-qep: Depend on X86

Limit the Intel counter driver to X86, it doesn't
make sense to build it for all arches if the counter
subsystem is enabled.

Signed-off-by: Peter Robinson <pbrobin

counter: intel-qep: Depend on X86

Limit the Intel counter driver to X86, it doesn't
make sense to build it for all arches if the counter
subsystem is enabled.

Signed-off-by: Peter Robinson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: Sort the Kconfig entries alphabetically

Sort the Kconfig menu alphabetically to make it easier
to read as the list grows larger.

Signed-off-by: Peter Robinson <[email protected]>
Link:

counter: Sort the Kconfig entries alphabetically

Sort the Kconfig menu alphabetically to make it easier
to read as the list grows larger.

Signed-off-by: Peter Robinson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>

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counter: ti-ecap-capture: capture driver support for ECAP

ECAP hardware on TI AM62x SoC supports capture feature. It can be used
to timestamp events (falling/rising edges) detected on input signal.

counter: ti-ecap-capture: capture driver support for ECAP

ECAP hardware on TI AM62x SoC supports capture feature. It can be used
to timestamp events (falling/rising edges) detected on input signal.

This commit adds capture driver support for ECAP hardware on AM62x SoC.

In the ECAP hardware, capture pin can also be configured to be in
PWM mode. Current implementation only supports capture operating mode.
Hardware also supports timebase sync between multiple instances, but
this driver supports simple independent capture functionality.

Signed-off-by: Julien Panis <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/25644ce1f2fd15d116977770ede20e024f658513.1664318353.git.william.gray@linaro.org
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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counter: 104-quad-8: Add COMPILE_TEST depends

104_QUAD_8 depends on X86, but compiles fine on ARCH=arm. This patch
adds support for COMPILE_TEST which is useful for compile testing code
changes to t

counter: 104-quad-8: Add COMPILE_TEST depends

104_QUAD_8 depends on X86, but compiles fine on ARCH=arm. This patch
adds support for COMPILE_TEST which is useful for compile testing code
changes to the driver and Counter subsystem.

Link: https://lore.kernel.org/r/[email protected]
Cc: Syed Nayyar Waris <[email protected]>
Suggested-by: Uwe Kleine-König <[email protected]>
Acked-by: Uwe Kleine-König <[email protected]>
Acked-by: Syed Nayyar Waris <[email protected]>
Signed-off-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/3917721e792d362ee108b2f12cd2223675449d05.1647373009.git.vilhelm.gray@gmail.com
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8

The LSI/CSI LS7266R1 chip provides programmable output via the FLG pins.
When interrupts are enabled on the ACCES 104-QUAD-8, they occur

counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8

The LSI/CSI LS7266R1 chip provides programmable output via the FLG pins.
When interrupts are enabled on the ACCES 104-QUAD-8, they occur whenever
FLG1 is active. Four functions are available for the FLG1 signal: Carry,
Compare, Carry-Borrow, and Index.

Carry:
Interrupt generated on active low Carry signal. Carry
signal toggles every time the respective channel's
counter overflows.

Compare:
Interrupt generated on active low Compare signal.
Compare signal toggles every time respective channel's
preset register is equal to the respective channel's
counter.

Carry-Borrow:
Interrupt generated on active low Carry signal and
active low Borrow signal. Carry signal toggles every
time the respective channel's counter overflows. Borrow
signal toggles every time the respective channel's
counter underflows.

Index:
Interrupt generated on active high Index signal.

These four functions correspond respectivefly to the following four
Counter event types: COUNTER_EVENT_OVERFLOW, COUNTER_EVENT_THRESHOLD,
COUNTER_EVENT_OVERFLOW_UNDERFLOW, and COUNTER_EVENT_INDEX. Interrupts
push Counter events to event channel X, where 'X' is the respective
channel whose FLG1 activated.

This patch adds IRQ support for the ACCES 104-QUAD-8. The interrupt line
numbers for the devices may be configured via the irq array module
parameter.

Acked-by: Syed Nayyar Waris <[email protected]>
Signed-off-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/e3a28e100840e3a336fa93fce77445f0e9d9a674.1632884256.git.vilhelm.gray@gmail.com
Signed-off-by: Jonathan Cameron <[email protected]>

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counter: Add support for Intel Quadrature Encoder Peripheral

Add support for Intel Quadrature Encoder Peripheral found on Intel
Elkhart Lake platform.

Initial implementation was done by Felipe Balb

counter: Add support for Intel Quadrature Encoder Peripheral

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) <[email protected]>
Signed-off-by: Felipe Balbi (Intel) <[email protected]>
Co-developed-by: Raymond Tan <[email protected]>
Signed-off-by: Raymond Tan <[email protected]>
Signed-off-by: Jarkko Nikula <[email protected]>
Acked-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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counter: add IRQ or GPIO based counter

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 exp

counter: add IRQ or GPIO based counter

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 <[email protected]>
Reviewed-by: Ahmad Fatoum <[email protected]>
Reviewed-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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

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

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

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/[email protected]/

Cc: Syed Nayyar Waris <[email protected]>
Signed-off-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/98a39983d5df761c058a469d1346fd8ffdef8516.1611973018.git.vilhelm.gray@gmail.com
Signed-off-by: Jonathan Cameron <[email protected]>

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

Currently, the STM32 LP Timer counter driver registers into both IIO and
counter subsystems, which is redundant.

Remove the IIO counter ABI and II

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

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 <[email protected]>
Signed-off-by: Fabrice Gasnier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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counter: Add microchip TCB capture counter

This drivers allows to use the capture mode of the Timer Counter Block
hardware block available in Microchip SoCs through the counter subsystem.

Two funct

counter: Add microchip TCB capture counter

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 <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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counter: new TI eQEP driver

This adds a new counter driver for the Texas Instruments Enhanced
Quadrature Encoder Pulse (eQEP) module.

Only very basic functionality is currently implemented - only e

counter: new TI eQEP driver

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 <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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counter/ftm-quaddec: Add missing dependencies in Kconfig

This driver uses devm_ioremap and of* functions. This fixes a
linking failure with e.g. ARCH=um.

Reported-by: kbuild test robot <[email protected]

counter/ftm-quaddec: Add missing dependencies in Kconfig

This driver uses devm_ioremap and of* functions. This fixes a
linking failure with e.g. ARCH=um.

Reported-by: kbuild test robot <[email protected]>
Signed-off-by: Patrick Havelange <[email protected]>
Fixes: a3b9a99 ("counter: add FlexTimer Module Quadrature decoder counter driver")
Signed-off-by: William Breathitt Gray <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project

treewide: Add SPDX license identifier - Makefile/Kconfig

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 <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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