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[ Upstream commit 1ca2a92b2a99323f666f1b669b7484df4bda05e4 ]
This reverts commit 72d3200061776264941be1b5a9bb8e926b3b30a5.
We cannot blindly query the direction of all GPIOs when the pins are
first registered. The get_direction callback normally triggers a
read/write to hardware, but we shouldn't be touching the hardware for
an individual GPIO until after it's been properly claimed.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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grgpio_irq_map/unmap()
[ Upstream commit e36eaf94be8f7bc4e686246eed3cf92d845e2ef8 ]
The driver may sleep while holding a spinlock.
The function call path (from bottom to top) in Linux 4.19 is:
drivers/gpio/gpio-grgpio.c, 261:
request_irq in grgpio_irq_map
drivers/gpio/gpio-grgpio.c, 255:
_raw_spin_lock_irqsave in grgpio_irq_map
drivers/gpio/gpio-grgpio.c, 318:
free_irq in grgpio_irq_unmap
drivers/gpio/gpio-grgpio.c, 299:
_raw_spin_lock_irqsave in grgpio_irq_unmap
request_irq() and free_irq() can sleep at runtime.
To fix these bugs, request_irq() and free_irq() are called without
holding the spinlock.
These bugs are found by a static analysis tool STCheck written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Link: https://lore.kernel.org/r/20191218132605.10594-1-baijiaju1990@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit c5706c7defc79de68a115b5536376298a8fef111 ]
Driver fails to compile in a minimized kernel's configuration because of
the missing dependency on GPIOLIB_IRQCHIP.
error: ‘struct gpio_chip’ has no member named ‘irq’
44 | virq = irq_find_mapping(gpio->gpio_chip.irq.domain, offset);
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20200106015154.12040-1-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 322f6a3182d42df18059a89c53b09d33919f755e ]
Dear Linus Walleij,
In old kernels, some APIs still try to use parent->of_node from struct gpio_chip,
and it could be resulted in kernel panic because parent is NULL. Adding platform
device to gpiochip->parent can fix this problem.
Signed-off-by: Johnson Chen <johnsonch.chen@moxa.com>
Link: https://patchwork.kernel.org/patch/11234609
Link: https://lore.kernel.org/r/HK0PR01MB3521489269F76467DFD7843FFA450@HK0PR01MB3521.apcprd01.prod.exchangelabs.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit d935bd50dd14a7714cbdba9a76435dbb56edb1ae upstream.
When a GPIO offset in a lookup table is out-of-range, the printed error
message (1) does not include the actual out-of-range value, and (2)
contains an off-by-one error in the upper bound.
Avoid user confusion by also printing the actual GPIO offset, and
correcting the upper bound of the range.
While at it, use "%u" for unsigned int.
Sample impact:
-requested GPIO 0 is out of range [0..32] for chip e6052000.gpio
+requested GPIO 0 (45) is out of range [0..31] for chip e6052000.gpio
Fixes: 2a3cf6a3599e9015 ("gpiolib: return -ENOENT if no GPIO mapping exists")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20191127095919.4214-1-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 256efaea1fdc4e38970489197409a26125ee0aaa upstream.
gpiolib has a corner case with open drain outputs that are emulated.
When such outputs are outputting a logic 1, emulation will set the
hardware to input mode, which will cause gpiod_get_direction() to
report that it is in input mode. This is different from the behaviour
with a true open-drain output.
Unify the semantics here.
Cc: <stable@vger.kernel.org>
Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 4e50573f39229d5e9c985fa3b4923a8b29619ade ]
The per-SoC devtype structures can contain their own callbacks that
overwrite mpc8xxx_gpio_devtype_default.
The clear intention is that mpc8xxx_irq_set_type is used in case the SoC
does not specify a more specific callback. But what happens is that if
the SoC doesn't specify one, its .irq_set_type is de-facto NULL, and
this overwrites mpc8xxx_irq_set_type to a no-op. This means that the
following SoCs are affected:
- fsl,mpc8572-gpio
- fsl,ls1028a-gpio
- fsl,ls1088a-gpio
On these boards, the irq_set_type does exactly nothing, and the GPIO
controller keeps its GPICR register in the hardware-default state. On
the LS1028A, that is ACTIVE_BOTH, which means 2 interrupts are raised
even if the IRQ client requests LEVEL_HIGH. Another implication is that
the IRQs are not checked (e.g. level-triggered interrupts are not
rejected, although they are not supported).
Fixes: 82e39b0d8566 ("gpio: mpc8xxx: handle differences between incarnations at a single place")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20191115125551.31061-1-olteanv@gmail.com
Tested-by: Michael Walle <michael@walle.cc>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit b0391479ae04dfcbd208b9571c375064caad9a57 upstream.
When converting milliseconds to microseconds in commit fffa6af94894
("gpio: max77620: Use correct unit for debounce times") some ~1 ms gaps
were introduced between the various ranges supported by the controller.
Fix this by changing the start of each range to the value immediately
following the end of the previous range. This way a debounce time of,
say 8250 us will translate into 16 ms instead of returning an -EINVAL
error.
Typically the debounce delay is only ever set through device tree and
specified in milliseconds, so we can never really hit this issue because
debounce times are always a multiple of 1000 us.
The only notable exception for this is drivers/mmc/host/mmc-spi.c where
the CD GPIO is requested, which passes a 1 us debounce time. According
to a comment preceeding that code this should actually be 1 ms (i.e.
1000 us).
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Pavel Machek <pavel@denx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 70728c29465bc4bfa7a8c14304771eab77e923c7 ]
The priv->data->set can be NULL while flags contains GPIO_SYSCON_FEAT_OUT
and chip->set is valid pointer. This happens in case the controller uses
the default GPIO setter. Always use chip->set to access the setter to avoid
possible NULL pointer dereferencing.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit fffa6af94894126994a7600c6f6f09b892e89fa9 ]
The gpiod_set_debounce() function takes the debounce time in
microseconds. Adjust the switch/case values in the MAX77620 GPIO to use
the correct unit.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191002122825.3948322-1-thierry.reding@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit 5ca2f54b597c816df54ff1b28eb99cf7262b955d upstream.
lineevent_create should not allow any of GPIOHANDLE_REQUEST_OUTPUT,
GPIOHANDLE_REQUEST_OPEN_DRAIN or GPIOHANDLE_REQUEST_OPEN_SOURCE to be set.
Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e95fbc130a162ba9ad956311b95aa0da269eea48 upstream.
linehandle_create should not allow both GPIOHANDLE_REQUEST_INPUT
and GPIOHANDLE_REQUEST_OUTPUT to be set.
Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2c60e6b5c9241b24b8b523fefd3e44fb85622cda upstream.
If the driver doesn't support open-drain/source config options, we
emulate this behavior when setting the direction by calling
gpiod_direction_input() if the default value is 0 (open-source) or
1 (open-drain), thus not actively driving the line in those cases.
This however clears the FLAG_IS_OUT bit for the GPIO line descriptor
and makes the LINEINFO ioctl() incorrectly report this line's mode as
'input' to user-space.
This commit modifies the ioctl() to always set the GPIOLINE_FLAG_IS_OUT
bit in the lineinfo structure's flags field. Since it's impossible to
use the input mode and open-drain/source options at the same time, we
can be sure the reported information will be correct.
Fixes: 521a2ad6f862 ("gpio: add userspace ABI for GPIO line information")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20190806114151.17652-1-brgl@bgdev.pl
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 223ecaf140b1dd1c1d2a1a1d96281efc5c906984 upstream.
When a pin is active-low, logical trigger edge should be inverted to match
the same interrupt opportunity.
For example, a button pushed triggers falling edge in ACTIVE_HIGH case; in
ACTIVE_LOW case, the button pushed triggers rising edge. For user space the
IRQ requesting doesn't need to do any modification except to configuring
GPIOHANDLE_REQUEST_ACTIVE_LOW.
For example, we want to catch the event when the button is pushed. The
button on the original board drives level to be low when it is pushed, and
drives level to be high when it is released.
In user space we can do:
req.handleflags = GPIOHANDLE_REQUEST_INPUT;
req.eventflags = GPIOEVENT_REQUEST_FALLING_EDGE;
while (1) {
read(fd, &dat, sizeof(dat));
if (dat.id == GPIOEVENT_EVENT_FALLING_EDGE)
printf("button pushed\n");
}
Run the same logic on another board which the polarity of the button is
inverted; it drives level to be high when pushed, and level to be low when
released. For this inversion we add flag GPIOHANDLE_REQUEST_ACTIVE_LOW:
req.handleflags = GPIOHANDLE_REQUEST_INPUT |
GPIOHANDLE_REQUEST_ACTIVE_LOW;
req.eventflags = GPIOEVENT_REQUEST_FALLING_EDGE;
At the result, there are no any events caught when the button is pushed.
By the way, button releasing will emit a "falling" event. The timing of
"falling" catching is not expected.
Cc: stable@vger.kernel.org
Signed-off-by: Michael Wu <michael.wu@vatics.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 3285170f28a850638794cdfe712eb6d93e51e706 ]
Commit 372e722ea4dd4ca1 ("gpiolib: use descriptors internally") renamed
the functions to use a "gpiod" prefix, and commit 79a9becda8940deb
("gpiolib: export descriptor-based GPIO interface") introduced the "raw"
variants, but both changes forgot to update the comments.
Readd a similar reference to gpiod_set_value(), which was accidentally
removed by commit 1e77fc82110ac36f ("gpio: Add missing open drain/source
handling to gpiod_set_value_cansleep()").
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20190701142738.25219-1-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit c859e0d479b3b4f6132fc12637c51e01492f31f6 ]
Documentation states:
NOTE: There must be a correlation between the wake-up enable and
interrupt-enable registers. If a GPIO pin has a wake-up configured
on it, it must also have the corresponding interrupt enabled (on
one of the two interrupt lines).
Ensure that this condition is always satisfied by enabling the detection
events after enabling the interrupt, and disabling the detection before
disabling the interrupt. This ensures interrupt/wakeup events can not
happen until both the wakeup and interrupt enables correlate.
If we do any clearing, clear between the interrupt enable/disable and
trigger setting.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 64ea3e9094a1f13b96c33244a3fb3a0f45690bd2 ]
Commit 384ebe1c2849 ("gpio/omap: Add DT support to GPIO driver") added
the register definition tables to the gpio-omap driver. Subsequently to
that commit, commit 4e962e8998cc ("gpio/omap: remove cpu_is_omapxxxx()
checks from *_runtime_resume()") added definitions for irqstatus_raw*
registers to the legacy OMAP4 definitions, but missed the DT
definitions.
This causes an unintentional change of behaviour for the 1.101 errata
workaround on OMAP4 platforms. Fix this oversight.
Fixes: 4e962e8998cc ("gpio/omap: remove cpu_is_omapxxxx() checks from *_runtime_resume()")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit e9646f0f5bb62b7d43f0968f39d536cfe7123b53 ]
The gpio-adp5588 driver uses interfaces that are provided by
GPIOLIB_IRQCHIP, so select that symbol in its Kconfig entry.
Fixes these build errors:
../drivers/gpio/gpio-adp5588.c: In function ‘adp5588_irq_handler’:
../drivers/gpio/gpio-adp5588.c:266:26: error: ‘struct gpio_chip’ has no member named ‘irq’
dev->gpio_chip.irq.domain, gpio));
^
../drivers/gpio/gpio-adp5588.c: In function ‘adp5588_irq_setup’:
../drivers/gpio/gpio-adp5588.c:298:2: error: implicit declaration of function ‘gpiochip_irqchip_add_nested’ [-Werror=implicit-function-declaration]
ret = gpiochip_irqchip_add_nested(&dev->gpio_chip,
^
../drivers/gpio/gpio-adp5588.c:307:2: error: implicit declaration of function ‘gpiochip_set_nested_irqchip’ [-Werror=implicit-function-declaration]
gpiochip_set_nested_irqchip(&dev->gpio_chip,
^
Fixes: 459773ae8dbb ("gpio: adp5588-gpio: support interrupt controller")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-gpio@vger.kernel.org
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit da38ef3ed10a09248e13ae16530c2c6d448dc47d ]
We are currently assuming all GPIOs are non-wakeup capable GPIOs as we
not configuring the bank->non_wakeup_gpios like we used to earlier with
platform_data.
Let's add omap_gpio_is_off_wakeup_capable() to make the handling clearer
while considering that later patches may want to configure SoC specific
bank->non_wakeup_gpios for the GPIOs in wakeup domain.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Tero Kristo <t-kristo@ti.com>
Reported-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit f7299d441a4da8a5088e651ea55023525a793a13 ]
If the call to of_gpiochip_scan_gpios() in of_gpiochip_add() fails, no
error handling is performed. This lead to the need of callers to call
of_gpiochip_remove() on failure, which causes "BAD of_node_put() on ..."
if the failure happened before the call to of_node_get().
Fix this by adding proper error handling.
Note that calling gpiochip_remove_pin_ranges() multiple times causes no
harm: subsequent calls are a no-op.
Fixes: dfbd379ba9b7431e ("gpio: of: Return error if gpio hog configuration failed")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
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[ Upstream commit 9ce3ebe973bf4073426f35f282c6b955ed802765 ]
In the corner case where the gpio driver probe fails, for whatever
reason, the suspend and resume handlers will still be called as they
have to be registered as syscore operations. This applies as well when
no probe was called while the driver has been built in the kernel.
Nicolas tracked this in :
https://bugzilla.kernel.org/show_bug.cgi?id=200905
Therefore, add a failsafe in these function, and test if a proper probe
succeeded and the driver is functional.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Reported-by: Nicolas Chauvet <kwizart@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit d01849f7deba81f4959fd9e51bf20dbf46987d1c ]
Tony notes that the GPIO module does not idle when level interrupts are
in use, as the wakeup appears to get stuck.
After extensive investigation, it appears that the wakeup will only be
cleared if the interrupt status register is cleared while the interrupt
is enabled. However, we are currently clearing it with the interrupt
disabled for level-based interrupts.
It is acknowledged that this observed behaviour conflicts with a
statement in the TRM:
CAUTION
After servicing the interrupt, the status bit in the interrupt status
register (GPIOi.GPIO_IRQSTATUS_0 or GPIOi.GPIO_IRQSTATUS_1) must be
reset and the interrupt line released (by setting the corresponding
bit of the interrupt status register to 1) before enabling an
interrupt for the GPIO channel in the interrupt-enable register
(GPIOi.GPIO_IRQSTATUS_SET_0 or GPIOi.GPIO_IRQSTATUS_SET_1) to prevent
the occurrence of unexpected interrupts when enabling an interrupt
for the GPIO channel.
However, this does not appear to be a practical problem.
Further, as reported by Grygorii Strashko <grygorii.strashko@ti.com>,
the TI Android kernel tree has an earlier similar patch as "GPIO: OMAP:
Fix the sequence to clear the IRQ status" saying:
if the status is cleared after disabling the IRQ then sWAKEUP will not
be cleared and gates the module transition
When we unmask the level interrupt after the interrupt has been handled,
enable the interrupt and only then clear the interrupt. If the interrupt
is still pending, the hardware will re-assert the interrupt status.
Should the caution note in the TRM prove to be a problem, we could
use a clear-enable-clear sequence instead.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
[tony@atomide.com: updated comments based on an earlier TI patch]
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit c5bc6e526d3f217ed2cc3681d256dc4a2af4cc2b upstream.
Current code test wrong value so it does not verify if the written
data is correctly read back. Fix it.
Also make it return -EPERM if read value does not match written bit,
just like it done for adnp_gpio_direction_output().
Fixes: 5e969a401a01 ("gpio: Add Avionic Design N-bit GPIO expander support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 7ae710f9f8b2cf95297e7bbfe1c09789a7dc43d4 ]
On SoC reset all GPIO interrupts are disable. However, if kexec is
used to boot into a new kernel, the SoC does not experience a
reset. Hence GPIO interrupts can be left enabled from the previous
kernel. It is then possible for the interrupt to fire before an
interrupt handler is registered, resulting in the kernel complaining
of an "unexpected IRQ trap", the interrupt is never cleared, and so
fires again, resulting in an interrupt storm.
Disable all GPIO interrupts before registering the GPIO IRQ chip.
Fixes: 7f2691a19627 ("gpio: vf610: add gpiolib/IRQ chip driver for Vybrid")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit abf221d2f51b8ce7b9959a8953f880a8b0a1400d upstream.
spi_read() and spi_write() require DMA-safe memory. When
CONFIG_VMAP_STACK is selected, those functions cannot be used
with buffers on stack.
This patch replaces calls to spi_read() and spi_write() by
spi_write_then_read() which doesn't require DMA-safe buffers.
Fixes: 0c36ec314735 ("gpio: gpio driver for max7301 SPI GPIO expander")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a05a14049999598a3bb6fab12db6b768a0215522 upstream.
The change corrects the error path in gpiochip_add_data_with_key()
by avoiding to call ida_simple_remove(), if ida_simple_get() returns
an error.
Note that ida_simple_remove()/ida_free() throws a BUG(), if id argument
is negative, it allows to easily check the correctness of the fix by
fuzzing the return value from ida_simple_get().
Fixes: ff2b13592299 ("gpio: make the gpiochip a real device")
Cc: stable@vger.kernel.org # v4.6+
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 833eacc7b5913da9896bacd30db7d490aa777868 ]
The MXS driver was calling back into the GPIO API from
its irqchip. This is not very elegant, as we are a driver,
let's just shortcut back into the gpio_chip .get() function
instead.
This is a tricky case since the .get() callback is not in
this file, instead assigned by bgpio_init(). Calling the
function direcly in the gpio_chip is however the lesser
evil.
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Janusz Uzycki <j.uzycki@elproma.com.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit 19a4fbffc94e41abaa2a623a25ce2641d69eccf0 upstream.
The current code only frees N-1 gpios if an error occurs during
gpiod_set_transitory, gpiod_direction_output or gpiod_direction_input.
Leading to gpios that cannot be used by userspace nor other drivers.
Cc: Timur Tabi <timur@codeaurora.org>
Cc: stable@vger.kernel.org
Fixes: ab3dbcf78f60f46d ("gpioib: do not free unrequested descriptors)
Reported-by: Jan Lorenzen <jl@newtec.dk>
Reported-by: Jim Paris <jim@jtan.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit d49b48f088c323dbacae44dfbe56d9c985c8a2a1 ]
gpiochip_add_data_with_key() adds the gpiochip to the gpio_devices list
before of_gpiochip_add() is called, but it's only the latter which sets
the ->of_xlate function pointer. gpiochip_find() can be called by
someone else between these two actions, and it can find the chip and
call of_gpiochip_match_node_and_xlate() which leads to the following
crash due to a NULL ->of_xlate().
Unhandled prefetch abort: page domain fault (0x01b) at 0x00000000
Modules linked in: leds_gpio(+) gpio_generic(+)
CPU: 0 PID: 830 Comm: insmod Not tainted 4.18.0+ #43
Hardware name: ARM-Versatile Express
PC is at (null)
LR is at of_gpiochip_match_node_and_xlate+0x2c/0x38
Process insmod (pid: 830, stack limit = 0x(ptrval))
(of_gpiochip_match_node_and_xlate) from (gpiochip_find+0x48/0x84)
(gpiochip_find) from (of_get_named_gpiod_flags+0xa8/0x238)
(of_get_named_gpiod_flags) from (gpiod_get_from_of_node+0x2c/0xc8)
(gpiod_get_from_of_node) from (devm_fwnode_get_index_gpiod_from_child+0xb8/0x144)
(devm_fwnode_get_index_gpiod_from_child) from (gpio_led_probe+0x208/0x3c4 [leds_gpio])
(gpio_led_probe [leds_gpio]) from (platform_drv_probe+0x48/0x9c)
(platform_drv_probe) from (really_probe+0x1d0/0x3d4)
(really_probe) from (driver_probe_device+0x78/0x1c0)
(driver_probe_device) from (__driver_attach+0x120/0x13c)
(__driver_attach) from (bus_for_each_dev+0x68/0xb4)
(bus_for_each_dev) from (bus_add_driver+0x1a8/0x268)
(bus_add_driver) from (driver_register+0x78/0x10c)
(driver_register) from (do_one_initcall+0x54/0x1fc)
(do_one_initcall) from (do_init_module+0x64/0x1f4)
(do_init_module) from (load_module+0x2198/0x26ac)
(load_module) from (sys_finit_module+0xe0/0x110)
(sys_finit_module) from (ret_fast_syscall+0x0/0x54)
One way to fix this would be to rework the hairy registration sequence
in gpiochip_add_data_with_key(), but since I'd probably introduce a
couple of new bugs if I attempted that, simply add a check for a
non-NULL of_xlate function pointer in
of_gpiochip_match_node_and_xlate(). This works since the driver looking
for the gpio will simply fail to find the gpio and defer its probe and
be reprobed when the driver which is registering the gpiochip has fully
completed its probe.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 6537886cdc9a637711fd6da980dbb87c2c87c9aa ]
This fixes:
[BUG] gpio: gpio-adp5588: A possible sleep-in-atomic-context bug
in adp5588_gpio_write()
[BUG] gpio: gpio-adp5588: A possible sleep-in-atomic-context bug
in adp5588_gpio_direction_input()
Reported-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 7279d9917560bbd0d82813d6bf00490a82c06783 ]
men_z127_debounce() tries to round up and down, but uses functions which
are only suitable when the divider is a power of two, which is not the
case. Use the appropriate ones.
Found by static check. Compile tested.
Fixes: f436bc2726c64 ("gpio: add driver for MEN 16Z127 GPIO controller")
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit b23ec59926faf05b0c43680d05671c484e810ac4 ]
Since we put static variable to a header file it's copied to each module
that includes the header. But not all of them are actually used it.
Mark gpio_suffixes array with __maybe_unused to hide a compiler warning:
In file included from
drivers/gpio/gpiolib-legacy.c:6:0:
drivers/gpio/gpiolib.h:95:27: warning: ‘gpio_suffixes’ defined but not used [-Wunused-const-variable=]
static const char * const gpio_suffixes[] = { "gpios", "gpio" };
^~~~~~~~~~~~~
In file included from drivers/gpio/gpiolib-devprop.c:17:0:
drivers/gpio/gpiolib.h:95:27: warning: ‘gpio_suffixes’ defined but not used [-Wunused-const-variable=]
static const char * const gpio_suffixes[] = { "gpios", "gpio" };
^~~~~~~~~~~~~
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 9506755633d0b32ef76f67c345000178e9b0dfc4 ]
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
a bit later in the code.
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = platform_get_resource(pdev, t, n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 4bf4eed44bfe288f459496eaf38089502ef91a79 ]
If ioh_gpio_probe() fails on devm_irq_alloc_descs() then chip may point
to any element of chip_save array, so reverse iteration from pointer chip
may become chip_save[-1] and gpiochip_remove() will operate with wrong
memory.
The patch fix the error path of ioh_gpio_probe() to correctly bypass
chip_save array.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 40b25bce0adbe641a744d1291bc0e51fb7f3c3d8 ]
There is a bug in regards to deferred probing within the drivers core
that causes GPIO-driver to suspend after its users. The bug appears if
GPIO-driver probe is getting deferred, which happens after introducing
dependency on PINCTRL-driver for the GPIO-driver by defining "gpio-ranges"
property in device-tree. The bug in the drivers core is old (more than 4
years now) and is well known, unfortunately there is no easy fix for it.
The good news is that we can workaround the deferred probe issue by
changing GPIO / PINCTRL drivers registration order and hence by moving
PINCTRL driver registration to the arch_init level and GPIO to the
subsys_init.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 7d18f0a14aa6a0d6bad39111c1fb655f07f71d59 upstream.
Sometimes a GPIO is fetched with NULL as parent device, and
that is just fine. So under these circumstances, avoid using
dev_name() to provide a name for the GPIO line.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f001cc351ad3309ec8736c374e90e5a4bc472d41 upstream.
If gpiod_request() fails the cleanup must not call gpiod_free().
Cc: stable@vger.kernel.org
Fixes: 61f922db7221 ("gpio: userspace ABI for reading GPIO line events")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f241632fd087d3d9fbd5450f4d8c8604badd8348 upstream.
The unmask function disables all interrupts in a bank when unmasking an
interrupt. Only disable the given interrupt.
Cc: stable@vger.kernel.org
Signed-off-by: Govert Overgaauw <govert.overgaauw@prodrive-technologies.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ab3dbcf78f60f46d6a0ad63b1f4b690b7a427140 upstream.
If the main loop in linehandle_create() encounters an error, it
unwinds completely by freeing all previously requested GPIO
descriptors. However, if the error occurs in the beginning of
the loop before that GPIO is requested, then the exit code
attempts to free a null descriptor. If extrachecks is enabled,
gpiod_free() triggers a WARN_ON.
Instead, keep a separate count of legitimate GPIOs so that only
those are freed.
Cc: stable@vger.kernel.org
Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines")
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 24e78079bf2250874e33da2e7cfbb6db72d3caf4 ]
Some GPIO lines appear named "?" in the lsgpio dump due to their
requesting drivers not passing a reasonable label.
Most typically this happens if a device tree node just defines
gpios = <...> and not foo-gpios = <...>, the former gets named
"foo" and the latter gets named "?".
However the struct device passed in is always valid so let's
just label the GPIO with dev_name() on the device if no proper
label was passed.
Cc: Reported-by: Jason Kridner <jkridner@beagleboard.org>
Reported-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 9a752b4c9ab924033bfdb8784c680d50b2bd5684 ]
The Crystal Cove PMIC has 16 real GPIOs but the ACPI code for devices
with this PMIC may address up to 95 GPIOs, these extra GPIOs are
called virtual GPIOs and are used by the ACPI code as a method of
accessing various non GPIO bits of PMIC.
Commit dcdc3018d635 ("gpio: crystalcove: support virtual GPIO") added
dummy support for these to avoid a bunch of ACPI errors, but instead of
ignoring writes / reads to them by doing:
if (gpio >= CRYSTALCOVE_GPIO_NUM)
return 0;
It accidentally introduced the following wrong check:
if (gpio > CRYSTALCOVE_VGPIO_NUM)
return 0;
Which means that attempts by the ACPI code to access these gpios
causes some arbitrary gpio to get touched through for example
GPIO1P0CTLO + gpionr % 8.
Since we do support input/output (but not interrupts) on the 0x5e
virtual GPIO, this commit makes to_reg return -ENOTSUPP for unsupported
virtual GPIOs so as to not have to check for (gpio >= CRYSTALCOVE_GPIO_NUM
&& gpio != 0x5e) everywhere and to make it easier to add support for more
virtual GPIOs in the future.
It then adds a check for to_reg returning an error to all callers where
this may happen fixing the ACPI code accessing virtual GPIOs accidentally
causing changes to real GPIOs.
Fixes: dcdc3018d635 ("gpio: crystalcove: support virtual GPIO")
Cc: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 881ebd229f4a5ea88f269c1225245e50db9ba303 ]
According to Whiskey Cove PMIC spec, bit 7 of GPIOIRQ0_REG belongs to
battery IO. So we should skip this bit when checking for GPIO IRQ pending
status. Otherwise, wcove_gpio_irq_handler() might go into the infinite
loop until IRQ "pending" status becomes 0. This patch fixes this issue.
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 7c2d176fe3f8dce632b948f79c7e89916ffe2c70 ]
Whiskey cove PMIC has three GPIO banks with total number of 13 GPIO
pins. But when checking for the pending status, for_each_set_bit() uses
bit width of 7 and hence it only checks the status for first 7 GPIO pins
missing to check/clear the status of rest of the GPIO pins. This patch
fixes this issue.
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b115bebc07f282067eccc06fd5aa3060ab1426da upstream.
When CONFIG_PM_SLEEP is disabled, we get a warning about unused functions:
drivers/gpio/gpio-xgene.c:155:12: warning: 'xgene_gpio_resume' defined but not used [-Wunused-function]
static int xgene_gpio_resume(struct device *dev)
^~~~~~~~~~~~~~~~~
drivers/gpio/gpio-xgene.c:142:12: warning: 'xgene_gpio_suspend' defined but not used [-Wunused-function]
static int xgene_gpio_suspend(struct device *dev)
The warnings are harmless and can be avoided by simplifying the code and marking
the functions as __maybe_unused.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit fbc2a294f29e726787a0f5238b27137904f26b81 upstream.
The only usage of function intel_gpio_runtime_idle() is here (in the
same file):
static const struct dev_pm_ops intel_gpio_pm_ops = {
SET_RUNTIME_PM_OPS(NULL, NULL, intel_gpio_runtime_idle)
};
And when CONFIG_PM is not set, the macro SET_RUNTIME_PM_OPS expands to
nothing, causing the following compiler warning:
drivers/gpio/gpio-intel-mid.c:324:12: warning: ‘intel_gpio_runtime_idle’
defined but not used [-Wunused-function]
static int intel_gpio_runtime_idle(struct device *dev)
Fix it by annotating the function with __maybe_unused.
Signed-off-by: Augusto Mecking Caringi <augustocaringi@gmail.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 539340f37e6d6ed4cd93e8e18c9b2e4eafd4b842 upstream.
This change resolves a new compile-time warning
when built as a loadable module:
WARNING: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-ath79.o
see include/linux/module.h for more information
This adds the license as "GPL v2", which matches the header of the file.
MODULE_DESCRIPTION is also added.
Signed-off-by: Jesse Chan <jc@linux.com>
Acked-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 97b03136e1b637d7a9d2274c099e44ecf23f1103 upstream.
This change resolves a new compile-time warning
when built as a loadable module:
WARNING: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-iop.o
see include/linux/module.h for more information
This adds the license as "GPL", which matches the header of the file.
MODULE_DESCRIPTION and MODULE_AUTHOR are also added.
Signed-off-by: Jesse Chan <jc@linux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 24bd3efc9d1efb5f756a7c6f807a36ddb6adc671 upstream.
The GPIO event descriptor was leaking kernel stack to
userspace because we don't zero the variable before
use. Ooops. Fix this.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b888fb6f2a278442933e3bfab70262e9a5365fb3 upstream.
Move the workaround from stmpe_gpio_irq_unmask() which is executed
in atomic context to stmpe_gpio_irq_sync_unlock() which is not.
It fixes the following issue:
[ 1.500000] BUG: scheduling while atomic: swapper/1/0x00000002
[ 1.500000] CPU: 0 PID: 1 Comm: swapper Not tainted 4.15.0-rc2-00020-gbd4301f-dirty #28
[ 1.520000] Hardware name: STM32 (Device Tree Support)
[ 1.520000] [<0000bfc9>] (unwind_backtrace) from [<0000b347>] (show_stack+0xb/0xc)
[ 1.530000] [<0000b347>] (show_stack) from [<0001fc49>] (__schedule_bug+0x39/0x58)
[ 1.530000] [<0001fc49>] (__schedule_bug) from [<00168211>] (__schedule+0x23/0x2b2)
[ 1.550000] [<00168211>] (__schedule) from [<001684f7>] (schedule+0x57/0x64)
[ 1.550000] [<001684f7>] (schedule) from [<0016a513>] (schedule_timeout+0x137/0x164)
[ 1.550000] [<0016a513>] (schedule_timeout) from [<00168b91>] (wait_for_common+0x8d/0xfc)
[ 1.570000] [<00168b91>] (wait_for_common) from [<00139753>] (stm32f4_i2c_xfer+0xe9/0xfe)
[ 1.580000] [<00139753>] (stm32f4_i2c_xfer) from [<00138545>] (__i2c_transfer+0x111/0x148)
[ 1.590000] [<00138545>] (__i2c_transfer) from [<001385cf>] (i2c_transfer+0x53/0x70)
[ 1.590000] [<001385cf>] (i2c_transfer) from [<001388a5>] (i2c_smbus_xfer+0x12f/0x36e)
[ 1.600000] [<001388a5>] (i2c_smbus_xfer) from [<00138b49>] (i2c_smbus_read_byte_data+0x1f/0x2a)
[ 1.610000] [<00138b49>] (i2c_smbus_read_byte_data) from [<00124fdd>] (__stmpe_reg_read+0xd/0x24)
[ 1.620000] [<00124fdd>] (__stmpe_reg_read) from [<001252b3>] (stmpe_reg_read+0x19/0x24)
[ 1.630000] [<001252b3>] (stmpe_reg_read) from [<0002c4d1>] (unmask_irq+0x17/0x22)
[ 1.640000] [<0002c4d1>] (unmask_irq) from [<0002c57f>] (irq_startup+0x6f/0x78)
[ 1.650000] [<0002c57f>] (irq_startup) from [<0002b7a1>] (__setup_irq+0x319/0x47c)
[ 1.650000] [<0002b7a1>] (__setup_irq) from [<0002bad3>] (request_threaded_irq+0x6b/0xe8)
[ 1.660000] [<0002bad3>] (request_threaded_irq) from [<0002d0b9>] (devm_request_threaded_irq+0x3b/0x6a)
[ 1.670000] [<0002d0b9>] (devm_request_threaded_irq) from [<001446e7>] (mmc_gpiod_request_cd_irq+0x49/0x8a)
[ 1.680000] [<001446e7>] (mmc_gpiod_request_cd_irq) from [<0013d45d>] (mmc_start_host+0x49/0x60)
[ 1.690000] [<0013d45d>] (mmc_start_host) from [<0013e40b>] (mmc_add_host+0x3b/0x54)
[ 1.700000] [<0013e40b>] (mmc_add_host) from [<00148119>] (mmci_probe+0x4d1/0x60c)
[ 1.710000] [<00148119>] (mmci_probe) from [<000f903b>] (amba_probe+0x7b/0xbe)
[ 1.720000] [<000f903b>] (amba_probe) from [<001170e5>] (driver_probe_device+0x169/0x1f8)
[ 1.730000] [<001170e5>] (driver_probe_device) from [<001171b7>] (__driver_attach+0x43/0x5c)
[ 1.740000] [<001171b7>] (__driver_attach) from [<0011618d>] (bus_for_each_dev+0x3d/0x46)
[ 1.740000] [<0011618d>] (bus_for_each_dev) from [<001165cd>] (bus_add_driver+0xcd/0x124)
[ 1.740000] [<001165cd>] (bus_add_driver) from [<00117713>] (driver_register+0x4d/0x7a)
[ 1.760000] [<00117713>] (driver_register) from [<001fc765>] (do_one_initcall+0xbd/0xe8)
[ 1.770000] [<001fc765>] (do_one_initcall) from [<001fc88b>] (kernel_init_freeable+0xfb/0x134)
[ 1.780000] [<001fc88b>] (kernel_init_freeable) from [<00167ee3>] (kernel_init+0x7/0x9c)
[ 1.790000] [<00167ee3>] (kernel_init) from [<00009b65>] (ret_from_fork+0x11/0x2c)
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit f759921cfbf4847319d197a6ed7c9534d593f8bc ]
When a threaded irq handler is chained attached to one of the gpio
pins when configure for level irq the altera_gpio_irq_leveL_high_handler
does not mask the interrupt while being handled by the chained irq.
This resulting in the threaded irq not getting enough cycles to complete
quickly enough before the irq was disabled as faulty. handle_level_irq
should be used in this situation instead of handle_simple_irq.
In gpiochip_irqchip_add set default handler to handle_bad_irq as
per Documentation/gpio/driver.txt. Then set the correct handler in
the set_type callback.
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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