This reverts commit ad2bea79ef.
On systems with older PMUFW (Xilinx ZynqMP Platform Management Firmware)
using these pinctrl properties can cause system hang because there is
missing feature autodetection.
When this feature is implemented in the PMUFW, support for these two
properties should bring back.
Cc: stable@vger.kernel.org
Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20221017130303.21746-2-sai.krishna.potthuri@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Back in the description of commit e440e30e26 ("arm64: dts: qcom:
sc7180: Avoid glitching SPI CS at bootup on trogdor") we described a
problem that we were seeing on trogdor devices. I'll re-summarize here
but you can also re-read the original commit.
On trogdor devices, the BIOS is setting up the SPI chip select as:
- mux special function (SPI chip select)
- output enable
- output low (unused because we've muxed as special function)
In the kernel, however, we've moved away from using the chip select
line as special function. Since the kernel wants to fully control the
chip select it's far more efficient to treat the line as a GPIO rather
than sending packet-like commands to the GENI firmware every time we
want the line to toggle.
When we transition from how the BIOS had the pin configured to how the
kernel has the pin configured we end up glitching the line. That's
because we _first_ change the mux of the line and then later set its
output. This glitch is bad and can confuse the device on the other end
of the line.
The old commit e440e30e26 ("arm64: dts: qcom: sc7180: Avoid
glitching SPI CS at bootup on trogdor") fixed the glitch, though the
solution was far from elegant. It essentially did the thing that
everyone always hates: encoding a sequential program in device tree,
even if it's a simple one. It also, unfortunately, got broken by
commit b991f8c362 ("pinctrl: core: Handling pinmux and pinconf
separately"). After that commit we did all the muxing _first_ even
though the config (set the pin to output high) was listed first. :(
I looked at ideas for how to solve this more properly. My first
thought was to use the "init" pinctrl state. In theory the "init"
pinctrl state is supposed to be exactly for achieving glitch-free
transitions. My dream would have been for the "init" pinctrl to do
nothing at all. That would let us delay the automatic pin muxing until
the driver could set things up and call pinctrl_init_done(). In other
words, my dream was:
/* Request the GPIO; init it 1 (because DT says GPIO_ACTIVE_LOW) */
devm_gpiod_get_index(dev, "cs", GPIOD_OUT_LOW);
/* Output should be right, so we can remux, yay! */
pinctrl_init_done(dev);
Unfortunately, it didn't work out. The primary reason is that the MSM
GPIO driver implements gpio_request_enable(). As documented in
pinmux.h, that function automatically remuxes a line as a GPIO. ...and
it does this remuxing _before_ specifying the output of the pin. You
can see in gpiod_get_index() that we call gpiod_request() before
gpiod_configure_flags(). gpiod_request() isn't passed any flags so it
has no idea what the eventual output will be.
We could have debates about whether or not the automatic remuxing to
GPIO for the MSM pinctrl was a good idea or not, but at this point I
think there is a plethora of code that's relying on it and I certainly
wouldn't suggest changing it.
Alternatively, we could try to come up with a way to pass the initial
output state to gpio_request_enable() and plumb all that through. That
seems like it would be doable, but we'd have to plumb it through
several layers in the stack.
This patch implements yet another alternative. Here, we specifically
avoid glitching the first time a pin is muxed to GPIO function if the
direction of the pin is output. The idea is that we can read the state
of the pin before we set the mux and make sure that the re-mux won't
change the state.
NOTES:
- We only do this the first time since later swaps between mux states
might want to preserve the old output value. In other words, I
wouldn't want to break a driver that did:
gpiod_set_value(g, 1);
pinctrl_select_state(pinctrl, special_state);
pinctrl_select_default_state();
/* We should be driving 1 even if "special_state" made the pin 0 */
- It's safe to do this the first time since the driver _couldn't_ have
explicitly set a state. In order to even be able to control the GPIO
(at least using gpiod) we have to have requested it which would have
counted as the first mux.
- In theory, instead of keeping track of the first time a pin was set
as a GPIO we could enable the glitch-free behavior only when
msm_pinmux_request_gpio() is in the callchain. That works an enables
my "dream" implementation above where we use an "init" state to
solve this. However, it's nice not to have to do this. By handling
just the first transition to GPIO we can simply let the normal
"default" remuxing happen and we can be assured that there won't be
a glitch.
Before this change I could see the glitch reported on the EC console
when booting. It would say this when booting the kernel:
Unexpected state 1 in CSNRE ISR
After this change there is no error reported.
Note that I haven't reproduced the original problem described in
e440e30e26 ("arm64: dts: qcom: sc7180: Avoid glitching SPI CS at
bootup on trogdor") but I could believe it might happen in certain
timing conditions.
Fixes: b991f8c362 ("pinctrl: core: Handling pinmux and pinconf separately")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20221014103217.1.I656bb2c976ed626e5d37294eb252c1cf3be769dc@changeid
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Fixes UART1 function bits and MMC groups typo.
For pins 0x97,0x99 function 0 is designated to PWM3/PWM5
respectively, function is 1 designated to the UART1.
Diff from v1:
- sent separately
- added tag Fixes
Cc: stable@vger.kernel.org
Fixes: b582b5a434 ("pinctrl: Ingenic: Add pinctrl driver for JZ4755.")
Tested-by: Siarhei Volkau <lis8215@gmail.com>
Signed-off-by: Siarhei Volkau <lis8215@gmail.com>
Link: https://lore.kernel.org/r/20221016153548.3024209-1-lis8215@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
- Core code:
- Provide a generic wrapper which can be utilized in drivers to handle
the problem of force threaded demultiplex interrupts on RT enabled
kernels. This avoids conditionals and horrible quirks in drivers all
over the place.
- Fix up affected pinctrl and GPIO drivers to make them cleanly RT safe.
- Interrupt drivers:
- A new driver for the FSL MU platform specific MSI implementation.
- Make irqchip_init() available for pure ACPI based systems.
- Provide a functional DT binding for the Realtek RTL interrupt chip.
- The usual DT updates and small code improvements all over the place.
-----BEGIN PGP SIGNATURE-----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=2ok5
-----END PGP SIGNATURE-----
Merge tag 'irq-core-2022-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull interrupt updates from Thomas Gleixner:
"Core code:
- Provide a generic wrapper which can be utilized in drivers to
handle the problem of force threaded demultiplex interrupts on RT
enabled kernels. This avoids conditionals and horrible quirks in
drivers all over the place
- Fix up affected pinctrl and GPIO drivers to make them cleanly RT
safe
Interrupt drivers:
- A new driver for the FSL MU platform specific MSI implementation
- Make irqchip_init() available for pure ACPI based systems
- Provide a functional DT binding for the Realtek RTL interrupt chip
- The usual DT updates and small code improvements all over the
place"
* tag 'irq-core-2022-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
irqchip: IMX_MU_MSI should depend on ARCH_MXC
irqchip/imx-mu-msi: Fix wrong register offset for 8ulp
irqchip/ls-extirq: Fix invalid wait context by avoiding to use regmap
dt-bindings: irqchip: Describe the IMX MU block as a MSI controller
irqchip: Add IMX MU MSI controller driver
dt-bindings: irqchip: renesas,irqc: Add r8a779g0 support
irqchip/gic-v3: Fix typo in comment
dt-bindings: interrupt-controller: ti,sci-intr: Fix missing reg property in the binding
dt-bindings: irqchip: ti,sci-inta: Fix warning for missing #interrupt-cells
irqchip: Allow extra fields to be passed to IRQCHIP_PLATFORM_DRIVER_END
platform-msi: Export symbol platform_msi_create_irq_domain()
irqchip/realtek-rtl: use parent interrupts
dt-bindings: interrupt-controller: realtek,rtl-intc: require parents
irqchip/realtek-rtl: use irq_domain_add_linear()
irqchip: Make irqchip_init() usable on pure ACPI systems
bcma: gpio: Use generic_handle_irq_safe()
gpio: mlxbf2: Use generic_handle_irq_safe()
platform/x86: intel_int0002_vgpio: Use generic_handle_irq_safe()
ssb: gpio: Use generic_handle_irq_safe()
pinctrl: amd: Use generic_handle_irq_safe()
...
New drivers:
- Cypress CY8C95x0 chip pin control support, along with an immediate
cleanup.
- Mediatek MT8188 SoC pin control support.
- Qualcomm SM8450 and SC8280XP LPASS (low power audio subsystem)
pin control support.
- Qualcomm PM7250, PM8450
- Rockchip RV1126 SoC pin control support.
Improvements:
- Fix some missing pins in the Armada 37xx driver.
- Convert Broadcom and Nomadik drivers to use PINCTRL_PINGROUP() macro.
- Fix some GPIO irq_chips to be immutable.
- Massive Qualcomm device tree binding cleanup, with more to come.
-----BEGIN PGP SIGNATURE-----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=PvLX
-----END PGP SIGNATURE-----
Merge tag 'pinctrl-v6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"There is nothing exciting going on, no core changes, just a few
drivers and cleanups.
New drivers:
- Cypress CY8C95x0 chip pin control support, along with an immediate
cleanup
- Mediatek MT8188 SoC pin control support
- Qualcomm SM8450 and SC8280XP LPASS (low power audio subsystem) pin
control support
- Qualcomm PM7250, PM8450
- Rockchip RV1126 SoC pin control support
Improvements:
- Fix some missing pins in the Armada 37xx driver
- Convert Broadcom and Nomadik drivers to use PINCTRL_PINGROUP()
macro
- Fix some GPIO irq_chips to be immutable
- Massive Qualcomm device tree binding cleanup, with more to come"
* tag 'pinctrl-v6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (119 commits)
MAINTAINERS: adjust STARFIVE JH7100 PINCTRL DRIVER after file movement
pinctrl: starfive: Rename "pinctrl-starfive" to "pinctrl-starfive-jh7100"
pinctrl: Create subdirectory for StarFive drivers
dt-bindings: pinctrl: st,stm32: Document interrupt-controller property
dt-bindings: pinctrl: st,stm32: Document gpio-hog pattern property
dt-bindings: pinctrl: st,stm32: Document gpio-line-names
pinctrl: st: stop abusing of_get_named_gpio()
pinctrl: wpcm450: Correct the fwnode_irq_get() return value check
pinctrl: bcm: Remove unused struct bcm6328_pingroup
pinctrl: qcom: restrict drivers per ARM/ARM64
pinctrl: bcm: ns: Remove redundant dev_err call
gpio: rockchip: request GPIO mux to pinctrl when setting direction
pinctrl: rockchip: add pinmux_ops.gpio_set_direction callback
pinctrl: cy8c95x0: Align function names in cy8c95x0_pmxops
pinctrl: cy8c95x0: Drop atomicity on operations on push_pull
pinctrl: cy8c95x0: Lock register accesses in cy8c95x0_set_mux()
pinctrl: sunxi: sun50i-h5: Switch to use dev_err_probe() helper
pinctrl: stm32: Switch to use dev_err_probe() helper
dt-bindings: qcom-pmic-gpio: Add PM7250B and PM8450 bindings
pinctrl: qcom: spmi-gpio: Add compatible for PM7250B
...
The drivers branch for 6.1 is a bit larger than for most releases. Most
of the changes come from SoC maintainers for the drivers/soc subsystem:
- A new driver for error handling on the NVIDIA Tegra
'control backbone' bus.
- A new driver for Qualcomm LLCC/DDR bandwidth measurement
- New Rockchip rv1126 and rk3588 power domain drivers
- DT binding updates for memory controllers, older Rockchip
SoCs, various Mediatek devices, Qualcomm SCM firmware
- Minor updates to Hisilicon LPC bus, the Allwinner SRAM
driver, the Apple rtkit firmware driver, Tegra firmware
- Minor updates for SoC drivers (Samsung, Mediatek, Renesas,
Tegra, Qualcomm, Broadcom, NXP, ...)
There are also some separate subsystem with downstream maintainers that
merge updates this way:
- Various updates and new drivers in the memory controller
subsystem for Mediatek and Broadcom SoCs
- Small set of changes in preparation to add support for FF-A
v1.1 specification later, in the Arm FF-A firmware subsystem
- debugfs support in the PSCI firmware subsystem
-----BEGIN PGP SIGNATURE-----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=WX9J
-----END PGP SIGNATURE-----
Merge tag 'arm-drivers-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM driver updates from Arnd Bergmann:
"The drivers branch for 6.1 is a bit larger than for most releases.
Most of the changes come from SoC maintainers for the drivers/soc
subsystem:
- A new driver for error handling on the NVIDIA Tegra 'control
backbone' bus.
- A new driver for Qualcomm LLCC/DDR bandwidth measurement
- New Rockchip rv1126 and rk3588 power domain drivers
- DT binding updates for memory controllers, older Rockchip SoCs,
various Mediatek devices, Qualcomm SCM firmware
- Minor updates to Hisilicon LPC bus, the Allwinner SRAM driver, the
Apple rtkit firmware driver, Tegra firmware
- Minor updates for SoC drivers (Samsung, Mediatek, Renesas, Tegra,
Qualcomm, Broadcom, NXP, ...)
There are also some separate subsystem with downstream maintainers
that merge updates this way:
- Various updates and new drivers in the memory controller subsystem
for Mediatek and Broadcom SoCs
- Small set of changes in preparation to add support for FF-A v1.1
specification later, in the Arm FF-A firmware subsystem
- debugfs support in the PSCI firmware subsystem"
* tag 'arm-drivers-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (149 commits)
ARM: remove check for CONFIG_DEBUG_LL_SER3
firmware/psci: Add debugfs support to ease debugging
firmware/psci: Print a warning if PSCI doesn't accept PC mode
dt-bindings: memory: snps,dw-umctl2-ddrc: Extend schema with IRQs/resets/clocks props
dt-bindings: memory: snps,dw-umctl2-ddrc: Replace opencoded numbers with macros
dt-bindings: memory: snps,dw-umctl2-ddrc: Use more descriptive device name
dt-bindings: memory: synopsys,ddrc-ecc: Detach Zynq DDRC controller support
soc: sunxi: sram: Add support for the D1 system control
soc: sunxi: sram: Export the LDO control register
soc: sunxi: sram: Save a pointer to the OF match data
soc: sunxi: sram: Return void from the release function
soc: apple: rtkit: Add apple_rtkit_poll
soc: imx: add i.MX93 media blk ctrl driver
soc: imx: add i.MX93 SRC power domain driver
soc: imx: imx8m-blk-ctrl: Use genpd_xlate_onecell
soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets
soc: imx: imx8m-blk-ctrl: add i.MX8MP VPU blk ctrl
soc: imx: add i.MX8MP HDMI blk ctrl HDCP/HRV_MWR
soc: imx: add icc paths for i.MX8MP hsio/hdmi blk ctrl
soc: imx: add icc paths for i.MX8MP media blk ctrl
...
Add the SoC name to make it more clear. Also the next generation StarFive
SoCs will use "pinctrl-starfive" as the core of StarFive pinctrl driver.
No functional change.
Signed-off-by: Jianlong Huang <jianlong.huang@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@linux.starfivetech.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220930061404.5418-1-hal.feng@linux.starfivetech.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Move the StarFive JH7100 pinctrl driver to a new subdirectory
in preparation for adding more StarFive pinctrl drivers. No
functional change.
Signed-off-by: Jianlong Huang <jianlong.huang@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@linux.starfivetech.com>
Link: https://lore.kernel.org/r/20220930060819.5320-1-hal.feng@linux.starfivetech.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Pin descriptions for this chip only look like standard GPIO device tree
descriptions, while in fact they contain additional data (in excess of
number of cells specified in description of gpio controllers). They also
refer to only pins/gpios belonging to the driver and not to arbitrary
gpio in the system.
Because we want to stop exporting OF-specific handlers from gpiolib-of,
let's parse the pin reference ourself instead of trying to call
of_get_named_gpio().
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/YzSsgoVoJn4+mSpv@google.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
fwnode_irq_get() can return zero to indicate IRQ mapping errors.
Handle this case by skipping the interrupt resource.
Fixes: a1d1e0e3d8 ("pinctrl: nuvoton: Add driver for WPCM450")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20220927175509.15695-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
After commit 0e3db16300fb("pinctrl: bcm: Convert drivers to use struct pingroup
and PINCTRL_PINGROUP()"), no one use struct bcm6328_pingroup, so remove it.
Signed-off-by: Yuan Can <yuancan@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220927133926.103943-1-yuancan@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
There is no point to allow selecting pin-controller drivers for Qualcomm
ARMv7 SoCs when building ARM64 kernel, and vice versa. This makes
kernel configuration more difficult as many do not remember the Qualcomm
SoCs. There won't be a single image for ARMv7 and ARMv8/9 SoCs, so no
features/options are lost.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220925112103.148836-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Before the split of gpio and pinctrl sections in their own driver,
rockchip_set_mux was called in pinmux_ops.gpio_set_direction for
configuring a pin in its GPIO function.
This is essential for cases where pinctrl is "bypassed" by gpio
consumers otherwise the GPIO function is not configured for the pin and
it does not work. Such was the case for the sysfs/libgpiod userspace
GPIO handling.
Let's re-implement the pinmux_ops.gpio_set_direction callback so that
the gpio subsystem can request from the pinctrl driver to put the pin in
its GPIO function.
Fixes: 9ce9a02039 ("pinctrl/rockchip: drop the gpio related codes")
Cc: stable@vger.kernel.org
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Link: https://lore.kernel.org/r/20220930132033.4003377-2-foss+kernel@0leil.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
It seems that cy8c95x0_set_mux() missed serialization of IO access.
And its implementation looks half-baked. Add locking to the function.
Fixes: e6cbbe4294 ("pinctrl: Add Cypress cy8c95x0 support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220916205450.86278-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the probe path, dev_err() can be replace with dev_err_probe()
which will check if error code is -EPROBE_DEFER and and prints the
error name.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220917122208.1894769-1-yangyingliang@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the probe path, dev_err() can be replace with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220917122015.1893880-1-yangyingliang@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
On PREEMPT_RT enabled kernels the demultiplex interrupt handler is force
threaded and runs with interrupts enabled. The invocation of
generic_handle_domain_irq() with interrupts enabled triggers a lockdep
warning due to a non-irq safe lock acquisition.
Instead of disabling interrupts on the driver level, use
generic_handle_domain_irq_safe().
[ tglx: Split out from combo patch ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/YnkfWFzvusFFktSt@linutronix.de
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215954
The SPMI based PMICs have the HIGH and LOW GPIO output strength mappings
interchanged, fix them.
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Link: https://lore.kernel.org/r/20220912210624.4527-3-quic_amelende@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add support for SPMI PMIC GPIO subtypes GPIO_LV_VIN2 and
GPIO_MV_VIN3.
GPIO_LV_VIN2 GPIOs support two input reference voltages: VIN0 and
VIN1. These are typically connected to 1.8 V and 1.2 V supplies
respectively.
GPIO_MV_VIN3 GPIOs support three input reference voltages: VIN0,
VIN1, and VIN2. These are typically connected to Vph, 1.8 V, and
1.2 V supplies respectively.
Signed-off-by: David Collins <quic_collinsd@quicinc.com>
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Link: https://lore.kernel.org/r/20220912210624.4527-2-quic_amelende@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Commit b6d09f7807 ("pinctrl: nomadik: Drop U8540/9540 support") removes
the DB8540 pin controller driver and its config PINCTRL_DB8540.
There is some code left-over in the generic nomadik pinctrl driver, i.e.,
drivers/pinctrl/nomadik/pinctrl-nomadik.{ch}, that is still around for the
removed DB8540 pin controller driver.
Remove this remaining dead code.
This issue was discovered with ./scripts/checkkconfigsymbols.py.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220919065435.27747-1-lukas.bulwahn@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This makes the Nomadik GPIO irqchip immutable.
Tested on the Samsung Galaxy SIII mini GT-I8190.
Cc: Marc Zyngier <maz@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220917203036.167607-2-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The irq data passed to irc_chip handlers i the struct gpio_chip
and nothing else. We are just lucky that the nomadik chip
pointer is first in the struct. Use the proper dereferencing
and helpers.
Reported-by: Marc Zyngier <maz@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220917203036.167607-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When an external device generated a level based interrupt then the
interrupt controller could miss the interrupt. The reason is that the
interrupt controller can detect only link changes.
In the following example, if there is a PHY that generates an interrupt
then the following would happen. The GPIO detected that the interrupt
line changed, and then the 'ocelot_irq_handler' was called. Here it
detects which GPIO line saw the change and for that will call the
following:
1. irq_mask
2. phy interrupt routine
3. irq_eoi
4. irq_unmask
And this works fine for simple cases, but if the PHY generates many
interrupts, for example when doing PTP timestamping, then the following
could happen. Again the function 'ocelot_irq_handler' will be called
and then from here the following could happen:
1. irq_mask
2. phy interrupt routine
3. irq_eoi
4. irq_unmask
Right before step 3(irq_eoi), the PHY will generate another interrupt.
Now the interrupt controller will acknowledge the change in the
interrupt line. So we miss the interrupt.
A solution will be to use 'handle_level_irq' instead of
'handle_fasteoi_irq', because for this will change routine order of
handling the interrupt.
1. irq_mask
2. irq_ack
3. phy interrupt routine
4. irq_unmask
And now if the PHY will generate a new interrupt before irq_unmask, the
interrupt controller will detect this because it already acknowledge the
change in interrupt line at step 2(irq_ack).
But this is not the full solution because there is another issue. In
case there are 2 PHYs that share the interrupt line. For example phy1
generates an interrupt, then the following can happen:
1.irq_mask
2.irq_ack
3.phy0 interrupt routine
4.phy1 interrupt routine
5.irq_unmask
In case phy0 will generate an interrupt while clearing the interrupt
source in phy1, then the interrupt line will be kept down by phy0. So
the interrupt controller will not see any changes in the interrupt line.
The solution here is to update 'irq_unmask' such that it can detect if
the interrupt line is still active or not. And if it is active then call
again the procedure to clear the interrupts. But we don't want to do it
every time, only if we know that the interrupt controller has not seen
already that the interrupt line has changed.
While at this, add support also for IRQ_TYPE_LEVEL_LOW.
Fixes: be36abb71d ("pinctrl: ocelot: add support for interrupt controller")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://lore.kernel.org/r/20220909145942.844102-1-horatiu.vultur@microchip.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1. Minor fix in order of initializing pinctrl driver - GPIOs should be
configured before registering gpiolib.
2. Final steps to deprecated bindings headers with register constants.
The constants were moved to include files in DTS directories, because
these are not suitable for bindings. Remove final references and
mark binding header as deprecated to warn any users.
-----BEGIN PGP SIGNATURE-----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=YIgT
-----END PGP SIGNATURE-----
Merge tag 'samsung-pinctrl-6.1' of https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/samsung into devel
Samsung pinctrl drivers changes for v6.1
1. Minor fix in order of initializing pinctrl driver - GPIOs should be
configured before registering gpiolib.
2. Final steps to deprecated bindings headers with register constants.
The constants were moved to include files in DTS directories, because
these are not suitable for bindings. Remove final references and
mark binding header as deprecated to warn any users.
There are a few Ocelot chips that can contain SGPIO logic, but can be
controlled externally. Specifically the VSC7511, 7512, 7513, and 7514. In
the externally controlled configurations these registers are not
memory-mapped.
Add support for these non-memory-mapped configurations.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220905162132.2943088-6-colin.foster@in-advantage.com
As the commit message suggests, this simply adds the ability to select
SGPIO pinctrl as a module. This becomes more practical when the SGPIO
hardware exists on an external chip, controlled indirectly by I2C or SPI.
This commit enables that level of control.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220905162132.2943088-5-colin.foster@in-advantage.com
There are a few Ocelot chips that contain pinctrl logic, but can be
controlled externally. Specifically the VSC7511, 7512, 7513 and 7514. In
the externally controlled configurations these registers are not
memory-mapped.
Add support for these non-memory-mapped configurations.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220905162132.2943088-4-colin.foster@in-advantage.com
fwnode_irq_get() may return all possible signed values, such as Linux
error code or 0. Fix the code to handle this properly.
Fixes: 1074e1d23a ("pinctrl: pistachio: Switch to use fwnode instead of")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220908094323.31965-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The irqchip implementation used inside the gpiochips are not supposed to
be changed during runtime. So let's make the one inside the spmi-gpio
gpiochip immutable.
This fixes the below warning during boot:
gpio gpiochip0: (c440000.spmi:pmic@0:gpio@c000): not an immutable chip, please consider fixing it!
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20220830092232.168561-1-manivannan.sadhasivam@linaro.org
[switched two lines as indicated by Johan]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
GPIO library now accepts fwnode as a firmware node, so
switch the driver to use it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220905180034.73132-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
fwnode_irq_get() may return all possible signed values, such as Linux
error code. Fix the code to handle this properly.
Fixes: be2dc859ab ("pinctrl: pinctrl-microchip-sgpio: Add irq support (for sparx5)")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20220906115021.8661-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
PINCTRL_IMX depends on OF, however the dependency is missed when selected
by PINCTRL_IMX8M* (it does not follow the indirect 'select' statements),
select it explicitly.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/all/202209050605.fezJUgFH-lkp@intel.com/
Fixes: 87c2a29a6b ("pinctrl: imx8m: kconfig: Depends on SOC_IMX8M")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Link: https://lore.kernel.org/r/20220905224408.346425-1-francesco.dolcini@toradex.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In a few comments the style is not aligned with the rest.
Correct them.
While at it, drop unneeded blank lines and deduplicate 'Author'.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-17-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Make use of the GENMASK() (far less error-prone, far more concise).
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-16-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
ACPI table on Intel Galileo Gen 1 has wrong pin number for IRQ resource
of the I²C GPIO expander. Since we know what that number is and luckily
have GPIO bases fixed for SoC's controllers, we may use a simple DMI quirk
to match the platform and retrieve GpioInt() pin on it for the expander in
question.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-15-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add support of the expander found on Intel Galileo Gen1 board.
The platform information comes from ACPI.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-14-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Convert the module to be property provider agnostic and allow
it to be used on non-OF platforms.
Add mod_devicetable.h include.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-13-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The introduced callback ->pin_dbg_show() is useful for debugging.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-12-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Move the default values to the 'default' case in the switches.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-11-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Since we have pin configuration getter and setter provided,
there is no need to duplicate that in the custom ->set_config().
Instead, switch to gpiochip_generic_config().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-10-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pin control framework checks pin boundaries before calling
the respective driver's callbacks. Hence no need to check for
pin boundaries, the respective conditionals won't be ever true.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-9-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The Cypress CY8C95x0 chips have an internal EEPROM that defines
initial configuration. It might be that bootloader or other
entity wrote the platform related setup into it. Don't override
it in the driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-8-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
