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path: root/drivers/gpio
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2017-12-29genirq/irqdomain: Rename early argument of irq_domain_activate_irq()Thomas Gleixner
The 'early' argument of irq_domain_activate_irq() is actually used to denote reservation mode. To avoid confusion, rename it before abuse happens. No functional change. Fixes: 72491643469a ("genirq/irqdomain: Update irq_domain_ops.activate() signature") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandru Chirvasitu <achirvasub@gmail.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Mikael Pettersson <mikpelinux@gmail.com> Cc: Josh Poulson <jopoulso@microsoft.com> Cc: Mihai Costache <v-micos@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-pci@vger.kernel.org Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Saeed Mahameed <saeedm@mellanox.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: devel@linuxdriverproject.org Cc: KY Srinivasan <kys@microsoft.com> Cc: Alan Cox <alan@linux.intel.com> Cc: Sakari Ailus <sakari.ailus@intel.com>, Cc: linux-media@vger.kernel.org
2017-12-29gpio: brcmstb: Make really use of the new lockdep classThomas Gleixner
The recent extension of irq_set_lockdep_class() with a second argument added the new lockdep class to the mrcmstb driver, but used the already existing lockdep class as second argument, which leaves the new lockdep class defined but unused. Use the new lockdep class as that's what the change intended to do. Fixes: 39c3fd58952d ("kernel/irq: Extend lockdep class for request mutex") Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Lunn <andrew@lunn.ch> Cc: linus.walleij@linaro.org
2017-12-28gpio: fix aspeed_gpio_banks array size checkVasyl Gomonovych
The test should be >= ARRAY_SIZE() instead of > ARRAY_SIZE(). Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-28kernel/irq: Extend lockdep class for request mutexAndrew Lunn
The IRQ code already has support for lockdep class for the lock mutex in an interrupt descriptor. Extend this to add a second class for the request mutex in the descriptor. Not having a class is resulting in false positive splats in some code paths. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: linus.walleij@linaro.org Cc: grygorii.strashko@ti.com Cc: f.fainelli@gmail.com Link: https://lkml.kernel.org/r/1512234664-21555-1-git-send-email-andrew@lunn.ch
2017-12-22gpio: fix "gpio-line-names" property retrievalChristophe Leroy
Following commit 9427ecbed46cc ("gpio: Rework of_gpiochip_set_names() to use device property accessors"), "gpio-line-names" DT property is not retrieved anymore when chip->parent is not set by the driver. This is due to OF based property reads having been replaced by device based property reads. This patch fixes that by making use of fwnode_property_read_string_array() instead of device_property_read_string_array() and handing over either of_fwnode_handle(chip->of_node) or dev_fwnode(chip->parent) to that function. Fixes: 9427ecbed46cc ("gpio: Rework of_gpiochip_set_names() to use device property accessors") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-22gpio: gpio-reg: fix buildGrygorii Strashko
Revert changes introduced by commit f0fbe7bce733 ("gpio: Move irqdomain into struct gpio_irq_chip") as they are not aplicable to this driver. Reported-by: Russell King - ARM Linux <linux@armlinux.org.uk> Fixes: f0fbe7bce733 ("gpio: Move irqdomain into struct gpio_irq_chip") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-21gpiolib: Fix typo in comment ("piochip_add_data")Jonathan Neuschäfer
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-21gpio: reduce descriptor validation code sizeRasmus Villemoes
While we do need macros to be able to return from the "calling" function, we can still factor the checks done by the VALIDATE_DESC* macros into a real helper function. This reduces the backslashtitis, avoids duplicating the logic in the two macros and saves about 1K of generated code: $ scripts/bloat-o-meter drivers/gpio/gpiolib.o.{0,1} add/remove: 1/0 grow/shrink: 0/15 up/down: 104/-1281 (-1177) Function old new delta validate_desc - 104 +104 gpiod_set_value 192 135 -57 gpiod_set_raw_value 125 67 -58 gpiod_direction_output 412 351 -61 gpiod_set_value_cansleep 150 70 -80 gpiod_set_raw_value_cansleep 132 52 -80 gpiod_get_raw_value 139 54 -85 gpiod_set_debounce 226 140 -86 gpiod_direction_output_raw 124 38 -86 gpiod_get_value 161 74 -87 gpiod_cansleep 126 39 -87 gpiod_get_raw_value_cansleep 130 39 -91 gpiod_get_value_cansleep 152 59 -93 gpiod_is_active_low 128 33 -95 gpiod_request 299 184 -115 gpiod_direction_input 386 266 -120 Total: Before=25460, After=24283, chg -4.62% Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-21Revert "gpio: set up initial state from .get_direction()"Timur Tabi
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>
2017-12-20drivers: gpio: remove duplicate includesPravin Shedge
These duplicate includes have been found with scripts/checkincludes.pl but they have been removed manually to avoid removing false positives. Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com> Acked-by: Gregory Fong <gregory.0xf0@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20gpio: sysfs: avoid using kstrtol() in 'value' attribute writeChristophe Leroy
A 'perf record' on an app continuously writing in the 'value' attribute show that most of the time is spent in kstrtol() --17.99%--value_store | |--10.17%--kstrtoint | | | |--8.82%--kstrtoll | |--2.50%--gpiod_set_value_cansleep | |--1.82%--u16_gpio_set | |--1.46%--value_store The normal case is to write 0 or 1 in the attribute, therefore this patch avoids the call to kstrtol() in the most common cases Then 'perf record' shows --7.21%--value_store | |--2.69%--u16_gpio_set | |--1.47%--value_store | |--1.08%--gpiod_set_value_cansleep | |--0.60%--mutex_lock | --0.58%--mutex_unlock Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20gpio: sysfs: don't use sprintf() for 'value' attributeChristophe Leroy
A bench with 'perf record' shows that most of time spent in value_show() is spent in sprintf() --42.41%--sysfs_kf_read | |--39.73%--dev_attr_show | | | |--38.23%--value_show | | | | | |--29.22%--sprintf | | | | | |--2.94%--gpiod_get_value_cansleep | | | value_show() only returns "0\n" or "1\n", therefore the use of sprintf() can be avoided With this patch we get the following result with 'perf record' --13.89%--sysfs_kf_read | |--10.72%--dev_attr_show | | | |--9.44%--value_show | | | | | |--4.61%--gpiod_get_value_cansleep Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20gpio: sysfs: correct error handling on 'value' attribute read.Christophe Leroy
'value' attribute is supposed to only return 0 or 1 according to the documentation. With today's implementation, if gpiod_get_value_cansleep() fails the printed 'value' is a negative value. This patch ensures that an error is returned on read instead. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20gpio: sysfs: change 'value' attribute to preallocChristophe Leroy
The GPIO 'value' attribute is time critical. A small bench with 'perf record' on the app below shows that 80% of the time spent in sysfs_kf_seq_show() is spent in memset() for zeroising the buffer. |--67.48%--sysfs_kf_seq_show | | | |--54.40%--memset | | | |--11.49%--dev_attr_show | | | | | |--10.06%--value_show | | | | | | | |--4.75%--sprintf | | | | | This patch changes the attribute type to prealloc, eliminating the need to zeroise the buffer at each read. 'perf record' gives the following result. |--42.41%--sysfs_kf_read | | | |--39.73%--dev_attr_show | | | | | |--38.23%--value_show | | | | | | | |--29.22%--sprintf | | | | | Test done with the following small app: int main(int argc, char **argv) { int fd = open(argv[1], O_RDONLY); for (;;) { int buf[512]; read(fd, buf, 512); lseek(fd, 0, SEEK_SET); } exit(0); } Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20gpiolib: use kstrdup_const() for gpio_device labelBartosz Golaszewski
Users often pass a pointer to a static string to gpiochip_add_data() family of functions. Avoid unnecessary memory allocations with the provided helper routine. While at it: use a ternary operator instead of an if else for brevity. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-20gpiolib: constify label in gpio_deviceBartosz Golaszewski
This string is never modified. Make it const. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-08gpio: mockup: fix a return value checkBartosz Golaszewski
The return value of platform_device_register_resndata() on error is an error code converted to pointer with ERR_PTR(), not NULL. Check the return value correctly. Fixes: 8a39f597bcfd ("gpio: mockup: rework device probing") Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-07Merge branch 'ib-move-axp209' of /home/linus/linux-gpio into develLinus Walleij
2017-12-07Merge branch 'ib-move-axp209' into develLinus Walleij
2017-12-07pinctrl: move gpio-axp209 to pinctrlQuentin Schulz
To prepare the driver for the upcoming pinctrl features, move the GPIO driver AXP209 from GPIO to pinctrl subsystem. Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-07gpio: axp209: switch unsigned variables to unsigned intQuentin Schulz
Checkpatch complains with the following message: WARNING: Prefer 'unsigned int' to bare use of 'unsigned' Let's make it happy by switching over to unsigned int. Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: ftgpio010: Fix platform_get_irq's error checkingArvind Yadav
The platform_get_irq() function returns negative if an error occurs. zero or positive number on success. platform_get_irq() error checking for zero is not correct. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: aspeed: Add support for reset toleranceAndrew Jeffery
Use the new pinconf parameter for state persistence to expose the associated capability of the Aspeed GPIO controller. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: gpiolib: Generalise state persistence beyond sleepAndrew Jeffery
General support for state persistence is added to gpiolib with the introduction of a new pinconf parameter to propagate the request to hardware. The existing persistence support for sleep is adapted to include hardware support if the GPIO driver provides it. Persistence continues to be enabled by default; in-kernel consumers can opt out, but userspace (currently) does not have a choice. The *_SLEEP_MAY_LOSE_VALUE and *_SLEEP_MAINTAIN_VALUE symbols are renamed, dropping the SLEEP prefix to reflect that the concept is no longer sleep-specific. I feel that renaming to just *_MAY_LOSE_VALUE could initially be misinterpreted, so I've further changed the symbols to *_TRANSITORY and *_PERSISTENT to address this. The sysfs interface is modified only to keep consistency with the chardev interface in enforcing persistence for userspace exports. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: gpio-stmpe: make various char arrays static const, shrinks object sizeColin Ian King
Don't populate the read-only arrays edge_det_values, rise_values and fall_values on the stack but instead make them static and constify them. Makes the object code smaller by over 240 bytes: Before: text data bss dec hex filename 9525 2520 192 12237 2fcd drivers/gpio/gpio-stmpe.o After: text data bss dec hex filename 9025 2776 192 11993 2ed9 drivers/gpio/gpio-stmpe.o (gcc version 7.2.0 x86_64) Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: it87: fix mojibake in module metadataAdam Borowski
It had twice-encoded Unicode. Signed-off-by: Adam Borowski <kilobyte@angband.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: add helpers for accessing the gpio rangesBartosz Golaszewski
In order to avoid repeating the calculations on every access - add helpers for gpio base and ngpio components of the ranges array. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: rename gpio_mockup_params_nr to gpio_mockup_num_rangesBartosz Golaszewski
This variable holds the number of mockup GPIO ranges so rename it accordingly. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: modify the return value check for devm_irq_sim_init()Bartosz Golaszewski
As discussed with Marc Zyngier: irq_sim_init() and its devres variant should return the base of the allocated interrupt range on success rather than 0. This will be modified later - first, change the way users handle the return value of these routines. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: implement gpio_mockup_set_multiple()Bartosz Golaszewski
Implement the set_multiple() callback and register it with the gpiolib framework. This is only meant to also test the internal kernel API. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: tweak line breaksBartosz Golaszewski
Minor readability tweak: prefer breaking the lines in a way where the second part is longer than the first. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: verify that ngpio > 0Bartosz Golaszewski
Improve the module params sanitization: bail out from init if the user tries to pass a non-positive number of GPIO lines for any mockup chip. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: fix debugfs handlingBartosz Golaszewski
The debugfs routines returning pointers can return NULL or error codes embedded with ERR_PTR(). Check the return values with IS_ERR_OR_NULL(). While we're at it: make the error message more specific so it's not confused with the one emitted when the top-level gpio-mockup debugfs directory creation fails. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: group code by logicBartosz Golaszewski
Keep GPIO chip callbacks, event trigger callbacks and mockup chip setup code visibly separated. We're mostly good - just need to move the line naming routine below. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: change the type of value field in line state structBartosz Golaszewski
GPIO values are universally represented as integers. Change the type of the variable storing the current line value to int for consistency. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: extend the debugfs layoutBartosz Golaszewski
Currently each chip has a dedicated directory in debugfs for event triggers. We use the chip's label for the directory name, but the user can't really associate these directories with chip names without parsing the relevant sysfs entries. Use chip names for directory names. For backward compatibility: create links pointing to the actual directories named using the chip labels. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: pass the named_lines parameter over platform_dataBartosz Golaszewski
Move the last bits of code dealing with module parameters to the init function. Add a new variable to platform data, which indicates to the probe function if it should name the GPIO lines. If we ever want to make the line naming more fine-grained (e.g. per chip switch) it will be easier this way. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: merge gpio_mockup_add() into gpio_mockup_probe()Bartosz Golaszewski
Now that the probe() function only does what is should, there's no need to split the chip adding logic into a separate routine. Merge gpio_mockup_add() into gpio_mockup_probe(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: remove a stray tabBartosz Golaszewski
Minor coding style fix. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: implement gpio_mockup_err()Bartosz Golaszewski
Visually shrink the pr_err() calls by encapsulating adding the module name prefix to the message in a macro. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: rework device probingBartosz Golaszewski
We currently create a single platform device in init and then parse the configuration passed to us via module parameters in probe() before creating GPIO chips and registering them with the gpiolib framework. The relation between platform devices and mockup chips should be 1:1. Create a separate platform device for each mockup chip using convenient helpers (platform_device_register_resndata()). Pass a platform data structure to probe() in which the configuration (GPIO base, number of lines, chip index) extracted from the module params is stored. Make probe() create a single mockup chip for every platform device. This approach has several advantages: - we only parse the module parameters in init() and can bail out before attaching any device if the input is invalid (currently we would have to examine kernel logs), - we'll get notified by the device framework about errors in probe() for specific chips, - probe() gets simplified and only does what it's supposed to. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: verify the number of GPIO chips requestedBartosz Golaszewski
The number of supported mockup chips is limited. Check this limit when parsing the module parameters. Also: make sure that each chip is described with a <base - ngpio> pair. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: parse the module params in init, not probeBartosz Golaszewski
If the module parameters are invalid, we should bail out from the init function instead of detecting it during the device probe. That way we don't even allow the user to load the module if we don't accept the arguments. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: mockup: add missing prefixesBartosz Golaszewski
Add the gpio_mockup_ prefix to the remaining symbols that still don't have it, so that the entire driver code is consistent. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-02gpio: ath79: add missing MODULE_DESCRIPTION/LICENSEJesse Chan
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>
2017-12-02gpio: iop: add missing MODULE_DESCRIPTION/AUTHOR/LICENSEJesse Chan
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>
2017-12-02gpio: pca953x: fix vendor prefix for PCA9654Sergei Shtylyov
Despite commit 55020c8056a8 ("of: Add vendor prefix for ON Semiconductor Corp.") was made long ago, the latter commit 9f49f6dd0473 ("gpio: pca953x: add onsemi,pca9654 id") made use of another, undocumented vendor prefix. Since such prefix doesn't seem to be used in any device trees, I think we can just fix the "compatible" string in the driver and the bindings and be done with that... Fixes: 9f49f6dd0473 ("gpio: pca953x: add onsemi,pca9654 id") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-11-30gpio: davinci: Assign first bank regs for unbanked caseKeerthy
As per the re-design assign the first bank regs for unbanked irq case. This was missed out in the original patch. Signed-off-by: Keerthy <j-keerthy@ti.com> Fixes: b5cf3fd827d2e1 ("gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip") Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-11-30gpio: uniphier: fix mismatch between license text and MODULE_LICENSEMasahiro Yamada
The comment block of this file indicates GPL-2.0 "only", while the MODULE_LICENSE is GPL-2.0 "or later", as include/linux/module.h describes as follows: "GPL" [GNU Public License v2 or later] "GPL v2" [GNU Public License v2] I am the author of this driver, and my intention is GPL-2.0 "only". Fixes: dbe776c2ca54 ("gpio: uniphier: add UniPhier GPIO controller driver") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-11-30gpio: 74x164: Fix crash during .remove()Geert Uytterhoeven
Commit 7ebc194d0fd4bb0f ("gpio: 74x164: Introduce 'enable-gpios' property") added a new member gpiod_oe to the end of the struct gen_74x164_chip, after the zero-length buffer array. However, this buffer is a flexible array, allocated together with the structure during .probe(). As the buffer is no longer the last member, writing to it corrupts the newly added member after it. During device removal, the corrupted member will be used as a pointer, leading to a crash. This went unnoticed, as the flexible array was declared as "buffer[0]" instead of "buffer[]", and thus did not trigger a "flexible array member not at end of struct" error from gcc. Move the gpiod_oe field up to fix this, and drop the zero from the array size to prevent future similar bugs. Fixes: 7ebc194d0fd4bb0f ("gpio: 74x164: Introduce 'enable-gpios' property") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 07:14:16 +0000