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Renesas R8A7792 SoC is a member of the R-Car gen2 family, add support for
its GPIO controllers.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Remove duplicated include.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This reverts commit 7e7c059cb50c7c72d5a393b2c34fc57de1b01b55.
I was wrong about trying to do this, as it breaks the
orthogonality between gpiochips and irqchips.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Since commit dd34c37aa3e8 ("gpio: of: Allow -gpio suffix for property
names") when requesting a GPIO from the devicetree gpiolib looks for
properties with both the '-gpio' and the '-gpios' suffix. This was
implemented by first searching for the property with the '-gpios' suffix
and if that yields an error try the '-gpio' suffix. This approach has the
issue that any error returned when looking for the '-gpios' suffix is
silently discarded.
Commit 06fc3b70f1dc ("gpio: of: Fix handling for deferred probe for -gpio
suffix") partially addressed the issue by treating the EPROBE_DEFER error
as a special condition. This fixed the case when the property is specified,
but the GPIO provider is not ready yet. But there are other cases in which
of_get_named_gpiod_flags() returns an error even though the property is
specified, e.g. if the specification is incorrect.
of_find_gpio() should only try to look for the property with the '-gpio'
suffix if no property with the '-gpios' suffix was found. If the property
was not found of_get_named_gpiod_flags() will return -ENOENT, so update the
condition to abort and propagate the error to the caller in all other
cases.
This is important for gpiod_get_optinal() and friends to behave correctly
in case the specifier contains errors. Without this patch they'll return
NULL if the property uses the '-gpios' suffix and the specifier contains
errors, which falsely indicates to the caller that no GPIO was specified.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When registering a GPIO chip, drivers can override the device tree node
associated with the chip by setting the chip's ->of_node field. If set,
this field is supposed to take precedence over the ->parent->of_node
field, but the code doesn't actually do that.
Commit 762c2e46c059 ("gpio: of: remove of_gpiochip_and_xlate() and
struct gg_data") exposes this because it now no longer matches on the
GPIO chip's ->of_node field, but the GPIO device's ->of_node field that
is set using the procedure described above.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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If we fail when copying the ioctl() struct to userspace we still
need to clean up the cruft otherwise left behind or it will stay
around until the issuing process terminates the file handle.
Reported-by: Alexander Stein <alexander.stein@systec-electronic.com>
Acked-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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platform_device_id table is needed for adding the tps65218-gpio
module to the mfd_cell array.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Gpio direction is determined by DIRx bit of GPIO
configuration register, return max77620 gpio value
based on direction in or out.
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When devres API is in use we are not supposed to call plain gpiochip_remove().
Remove redundant call to gpiochip_remove().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The error handling is not correct since the commit 3f7dbfd8eea9 ("gpio:
intel-mid: switch to using gpiolib irqchip helpers"). Switch to devres API to
fix the potential resource leak.
Fixes: commit 3f7dbfd8eea9 ("gpio: intel-mid: switch to using gpiolib irqchip helpers")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The conversion from a DT spec to struct gpio_desc is common between
of_get_named_gpiod_flags() and of_parse_own_gpio(). Factor out the
common code to a new helper, of_xlate_and_get_gpiod_flags().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The usage of gpiochip_find(&gg_data, of_gpiochip_and_xlate) is odd.
Usually gpiochip_find() is used to find a gpio_chip. Here, however,
the return value from gpiochip_find() is just discarded. Instead,
gpiochip_find(&gg_data, of_gpiochip_and_xlate) is called for the
side-effect of the match function.
The match function, of_gpiochip_find_and_xlate(), fills the given
struct gg_data, but a match function should be simply called to
judge the matching.
This commit fixes this distortion and makes the code more readable.
Remove of_gpiochip_find_and_xlate() and struct gg_data. Instead,
this adds a very simple helper function of_find_gpiochip_by_node().
Now, of_get_named_gpiod_flags() is implemented more straight-forward.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Do this sanity check only once when the gpio_chip is added
rather than every time gpio-hog is handled.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This function is doing more complicated than needed. The caller of
this function, of_gpiochip_scan_gpios() already knows the pointer to
the gpio_chip. It can pass it to of_parse_own_gpio() instead of
looking up the gpio_chip by gpiochip_find().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Call of_property_read_u32_array() only once rather than iterating
of_property_read_u32_index().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The generic IRQ helper library just checks if the IRQ line is
set as input before activating it for interrupts. As we
recently started to check things better with .get_dir() it
turns out that it's good to try to convince the line to become
an input before attempting to lock it as IRQ.
Reviewed-by: Björn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The lineevent_irq_thread is not exported, so make it static
to fix the following warning:
drivers/gpio/gpiolib.c:654:13: warning: symbol 'lineevent_irq_thread' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When initializing the GPIO handles, we use the iterator (i)
to back off if something goes wrong. But since the iterator
is also used after we pass the loop, we must decrement by
one after exiting the loop so that we point at the last
element in the array.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Walter Harms <wharms@bfs.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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gcc reports a theoretical case for returning uninitialized data in
the kfifo when a GPIO interrupt happens and neither
GPIOEVENT_REQUEST_RISING_EDGE nor GPIOEVENT_REQUEST_FALLING_EDGE
are set:
drivers/gpio/gpiolib.c: In function 'lineevent_irq_thread':
drivers/gpio/gpiolib.c:683:87: error: 'ge.id' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This case should not happen, but to be on the safe side, let's
return from the irq handler without adding data to the FIFO
to ensure we can never leak stack data to user space.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 61f922db7221 ("gpio: userspace ABI for reading GPIO line events")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This adds an ABI for listening to events on GPIO lines.
The mechanism returns an anonymous file handle to a request
to listen to a specific offset on a specific gpiochip.
To fetch the stream of events from the file handle, userspace
simply reads an event.
- Events can be requested with the same flags as ordinary
handles, i.e. open drain or open source. An ioctl() call
GPIO_GET_LINEEVENT_IOCTL is issued indicating the desired
line.
- Events can be requested for falling edge events, rising
edge events, or both.
- All events are timestamped using the kernel real time
nanosecond timestamp (the same as is used by IIO).
- The supplied consumer label will appear in "lsgpio"
listings of the lines, and in /proc/interrupts as the
mechanism will request an interrupt from the gpio chip.
- Events are not supported on gpiochips that do not serve
interrupts (no legal .to_irq() call). The event interrupt
is threaded to avoid any realtime problems.
- It is possible to also directly read the current value
of the registered GPIO line by issuing the same
GPIOHANDLE_GET_LINE_VALUES_IOCTL as used by the
line handles. Setting the value is not supported: we
do not listen to events on output lines.
This ABI is strongly influenced by Industrial I/O and surpasses
the old sysfs ABI by providing proper precision timestamps,
making it possible to set flags like open drain, and put
consumer names on the GPIO lines.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This adds a userspace ABI for reading and writing GPIO lines.
The mechanism returns an anonymous file handle to a request
to read/write n offsets from a gpiochip. This file handle
in turn accepts two ioctl()s: one that reads and one that
writes values to the selected lines.
- Handles can be requested as input/output, active low,
open drain, open source, however when you issue a request
for n lines with GPIO_GET_LINEHANDLE_IOCTL, they must all
have the same flags, i.e. all inputs or all outputs, all
open drain etc. If a granular control of the flags for
each line is desired, they need to be requested
individually, not in a batch.
- The GPIOHANDLE_GET_LINE_VALUES_IOCTL read ioctl() can be
issued also to output lines to verify that the hardware
is in the expected state.
- It reads and writes up to GPIOHANDLES_MAX lines at once,
utilizing the .set_multiple() call in the driver if
possible, making the call efficient if several lines
can be written with a single register update.
The limitation of GPIOHANDLES_MAX to 64 lines is done under
the assumption that we may expect hardware that can issue a
transaction updating 64 bits at an instant but unlikely
anything larger than that.
ChangeLog v2->v3:
- Use gpiod_get_value_cansleep() so we support also slowpath
GPIO drivers.
- Fix up the UAPI docs kerneldoc.
- Allocate the anonymous fd last, so that the release
function don't get called until that point of something
fails. After this point, skip the errorpath.
ChangeLog v1->v2:
- Handle ioctl_compat() properly based on a similar patch
to the other ioctl() handling code.
- Use _IOWR() as we pass pointers both in and out of the
ioctl()
- Use kmalloc() and kfree() for the linehandled, do not
try to be fancy with devm_* it doesn't work the way I
thought.
- Fix const-correctness on the linehandle name field.
Acked-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Intel Edison board has 4 GPIO expanders PCA9555a connected to I2C bus. Add an
ID to support them.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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On Acer One 10, the ACPI battery driver can not be probed because
it depends on the GPIO controller as well as the I2C controller to work,
Device (BATC)
{
Name (_HID, EisaId ("PNP0C0A") /* Control Method Battery */)
...
Name (_DEP, Package (0x03) // _DEP: Dependencies
{
I2C1,
GPO2,
GPO0
})
...
}
The I2C dependency also exists on other platforms and has been fixed by commit
40e7fcb19293 ("ACPI: Add _DEP support to fix battery issue on Asus T100TA"),
this patch resolves the GPIO dependency for Acer One 10.
Link:https://bugzilla.kernel.org/show_bug.cgi?id=115191
Tested-by: Stace A. Zacharov <stace75@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Avoids gpiolib assumptions on initial pin direction, allowing user to observe
power-on settings.
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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NBANK() macro assumes that ngpios is a multiple of 8(BANK_SZ) and
hence results in 0 banks for PCA9536 which has just 4 gpios. This is
wrong as PCA9356 has 1 bank with 4 gpios. This results in uninitialized
PCA953X_INVERT register. Fix this by using DIV_ROUND_UP macro in
NBANK().
Cc: stable@vger.kernel.org
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch adds support for the Western Digital's
MyBook Live memory-mapped GPIO controllers.
The GPIOs will be supported by the generic driver
for memory-mapped GPIO controllers.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch adds support for defining memory-mapped GPIOs which
are compatible with the existing gpio-mmio interface. The generic
library provides support for many memory-mapped GPIO controllers
that are found in various on-board FPGA and ASIC solutions that
are used to control board's switches, LEDs, chip-selects,
Ethernet/USB PHY power, etc.
For setting GPIOs there are three configurations:
1. single input/output register resource (named "dat"),
2. set/clear pair (named "set" and "clr"),
3. single output register resource and single input resource
("set" and dat").
The configuration is detected by which resources are present.
For the single output register, this drives a 1 by setting a bit
and a zero by clearing a bit. For the set clr pair, this drives
a 1 by setting a bit in the set register and clears it by setting
a bit in the clear register.
For setting the GPIO direction, there are three configurations:
a. simple bidirectional GPIOs that requires no configuration.
b. an output direction register (named "dirout")
where a 1 bit indicates the GPIO is an output.
c. an input direction register (named "dirin")
where a 1 bit indicates the GPIO is an input.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The Kconfig currently controlling compilation of this code is:
config GPIO_LPC18XX
bool "NXP LPC18XX/43XX GPIO support"
...meaning that it currently is not being built as a module by anyone.
When targeting orphaned modular code in non-modular drivers, this
came up. Joachim indicated that the driver was actually meant to
be tristate but ended up bool by accident. So here we make it
tristate instead of removing the modular code that was essentially
orphaned.
Cc: Joachim Eastwood <manabian@gmail.com>
Acked-by: Joachim Eastwood <manabian@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add ACPI support for GPIO controller on Broadcom Vulcan ARM64.
ACPI ID for this device is BRCM9006.
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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irq_alloc_descs need not be called in case of Vulcan, where we use
a dynamic IRQ range for GPIO interrupt numbers.
Update code not to call irq_alloc_descs and pass 0 as irq_base in
case of Vulcan.
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Since board support for the CLPS711X platform was removed,
remove the board support from the driver.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch changes the compatibility string to match with the smallest
supported chip (EP7209). Since the DT-support for this CPU is not yet
announced, this change is safe.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch changes the compatibility string to match with the smallest
supported chip (EP7209). Since the DT-support for this CPU is not yet
announced, this change is safe.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add function to set multiple GPIO of the same chip at the same time
and register it
Signed-off-by: Iban Rodriguez <irodriguez@cemitec.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The commit 9b8e3ec34318 ("gpio: pca953x: Use correct u16 value for register
word write") fixed regression in pca953x_write_regs(). At the same time the
solution introduced a sparse warning:
drivers/gpio/gpio-pca953x.c:168:39: warning: incorrect type in argument 3 (different base types)
drivers/gpio/gpio-pca953x.c:168:39: expected unsigned short [unsigned] [usertype] value
drivers/gpio/gpio-pca953x.c:168:39: got restricted __le16 [usertype] <noident>
Fix the code by enforcing the type of i2c_smbus_write_word_data() parameter.
Cc: Yong Li <sdliyong@gmail.com>
Cc: Phil Reid <preid@electromag.com.au>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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There are few redundant assignments of ret variable which is updated anyway.
Remove them for good.
While here, correct indentation of the constant definition and remove one empty
line.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The reset values for all the PCF lines are high and hence on
shutdown we should drive all the lines high in order to
bring it to the reset state.
This is actually required since PCF doesn't have a reset
line and even after warm reset (by invoking "reboot" in
prompt) the PCF lines maintains it's previous programmed
state. This becomes a problem if the boards are designed to
work with the default initial state.
DRA7XX_evm uses PCF8575 and one of the PCF output lines
feeds to MMC/SD VDD and this line should be driven high in order
for the MMC/SD to be detected. This line is modelled as
regulator and the hsmmc driver takes care of enabling and
disabling it. In the case of 'reboot', during shutdown path
as part of it's cleanup process the hsmmc driver disables
this regulator. This makes MMC *boot* not functional.
Fix it by driving all the pcf lines high.
This patch was sent long back
(https://patchwork.ozlabs.org/patch/420382/)
But there was a concern that contention might occur if the
PCF shutdown handler is invoked before the shutdown handler
of the PCF's consumers. In that case PCF shutdown handler can't
drive all the pcf lines high without knowing if the PCF
consumers are still active.
However commit 52cdbdd4985 ("driver core: correct device's
shutdown order") will make sure shutdown handler of PCF's
consumers are invoked before invoking the shutdown
handler of PCF. So it should be safe to merge this now.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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A platform_driver need not set an owner since it will be populated
by platform_driver_register().
Likewise for mcb_driver (gpio-menz127.c).
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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As the comment block of of_parse_phandle_with_fixed_args() says,
the caller is responsible to call of_node_put() on the returned
node when done.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The MAX77620 have a GPIO pins which can act as open drain or
push pull mode. Implement support for controlling this from GPIO
descriptor tables or other hardware descriptions such as
device tree by implementing the .set_single_ended() callback.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The GPIO sub modules of MAX77620 offers to configure the GPIO
interrupt trigger level as RISING and FALLING edge.
Pass this information to regmap-irg when registering for GPIO
interrupts.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This implements the .get_direction() callback for the STMPE
expander GPIO.
Cc: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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TI PCA9536 is 4-Bit I2C GPIO expander without interrupt support[1].
Add support for the same.
[1] TRM: http://www.ti.com/lit/ds/symlink/pca9536.pdf
Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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MAXIM Semiconductor's PMIC, MAX77620/MAX20024 has 8 GPIO
pins. It also supports interrupts from these pins.
Add GPIO driver for these pins to control via GPIO APIs.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When adding the gpiochip, the GPIO HW drivers' callback get_direction()
could get called in atomic context. Some of the GPIO HW drivers may
sleep when accessing the register.
Move the lock before initializing the descriptors.
Reported-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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In fdeb8e1547cb9dd39d5d7223b33f3565cf86c28e
("gpio: reflect base and ngpio into gpio_device")
assumed that GPIO descriptors are either valid or error
pointers, but gpiod_get_[index_]optional() actually return
NULL descriptors and then all subsequent calls should just
bail out.
Cc: stable@vger.kernel.org
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Fixes: fdeb8e1547cb ("gpio: reflect base and ngpio into gpio_device")
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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If we're using the compatible ioctl() we need to handle the
argument pointer in a special way or there will be trouble.
Fixes: 3c702e9987e2 ("gpio: add a userspace chardev ABI for GPIOs")
Reported-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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As irqchip and gpiochip functions are orthogonal, the IRQ
set-up or something else can have changed the direction of
the GPIO line from what the GPIO descriptor knows when we
get into gpiochip_lock_as_irq(). Make sure to re-read the
direction setting if we have the .get_direction() callback
enabled for the chip.
Else we get problems like this:
iio iio:device2: interrupts on the rising edge
gpio gpiochip2: (8012e080.gpio): gpiochip_lock_as_irq:
tried to flag a GPIO set as output for IRQ
gpio gpiochip2: (8012e080.gpio): unable to lock HW IRQ 0 for IRQ
genirq: Failed to request resources for l3g4200d-trigger
(irq 111) on irqchip nmk1-32-63
iio iio:device2: failed to request trigger IRQ.
st-gyro-i2c: probe of 2-0068 failed with error -22
Fixes: 72d320006177 ("gpio: set up initial state from .get_direction()")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The "to_irq" functionality is broken inside this driver since commit
76ba59f8366f ("genirq: Add irq_domain-aware core IRQ handler").
The addition of the new lpc32xx irqchip driver in 4.7, fixed the
lpc32xx platform interrupt issue.
When switching to the new lpc32xx irqchip driver, a warning appear
in the lpc32xx gpio driver: warning: "NR_IRQS" redefined.
To remove this warning (temporary solution), this patch
disables the broken "to_irq" mapping functionality support.
Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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