- 19 Feb, 2016 8 commits
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Linus Walleij authored
We're planning to remove the gpiochip_add() function to swith to gpiochip_add_data() with NULL for data argument. Cc: arm@kernel.org Acked-by:
Olof Johansson <olof@lixom.net> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org>
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Linus Walleij authored
We're planning to remove the gpiochip_add() function to swith to gpiochip_add_data() with NULL for data argument. Cc: arm@kernel.org Acked-by:
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Linus Walleij authored
We're planning to remove the gpiochip_add() function to swith to gpiochip_add_data() with NULL for data argument. Cc: arm@kernel.org Acked-by:
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Linus Walleij authored
This makes the driver use the data pointer added to the gpio_chip to store a pointer to the state container instead of relying on container_of(). Cc: arm@kernel.org Cc: Richard Purdie <rpurdie@rpsys.net> Acked-by:
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Linus Walleij authored
This makes the driver use the data pointer added to the gpio_chip to store a pointer to the state container instead of relying on container_of(). Cc: bcm-kernel-feedback-list@broadcom.com Cc: Scott Branden <sbranden@broadcom.com> Cc: Jon Mason <jonmason@broadcom.com> Acked-by:
Ray Jui <rjui@broadcom.com> Signed-off-by:
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Linus Walleij authored
This adds a GPIO line ABI for getting name, label and a few select flags from the kernel. This hides the kernel internals and only tells userspace what it may need to know: the different in-kernel consumers are masked behind the flag "kernel" and that is all userspace needs to know. However electric characteristics like active low, open drain etc are reflected to userspace, as this is important information. We provide information on all lines on all chips, later on we will likely add a flag for the chardev consumer so we can filter and display only the lines userspace actually uses in e.g. lsgpio, but then we first need an ABI for userspace to grab and use (get/set/select direction) a GPIO line. Sample output from "lsgpio" on ux500: GPIO chip: gpiochip7, "8011e000.gpio", 32 GPIO lines line 0: unnamed unlabeled line 1: unnamed unlabeled (...) line 25: unnamed "SFH7741 Proximity Sensor" [kernel output open-drain] line 26: unnamed unlabeled (...) Tested-by:Michael Welling <mwelling@ieee.org> Signed-off-by:
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Linus Walleij authored
The gpio_chip label is useful for userspace to understand what kind of GPIO chip it is dealing with. Let's store a copy of this label in the gpio_device, add it to the struct passed to userspace for GPIO_GET_CHIPINFO_IOCTL and modify lsgpio to show it. Signed-off-by: -
Linus Walleij authored
Just as it says: after adding the proper interfaces to gpiolib, this is no longer needed. Suggested-by:
Nicolas Saenz Julienne <nicolassaenzj@gmail.com> Signed-off-by:
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- 18 Feb, 2016 5 commits
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Arnd Bergmann authored
The ARM version of asm/gpio.h basically just contains the same definitions as the gpiolib version, with the exception of ARCH_NR_GPIOS. This adds the option for overriding the constant through Kconfig to the architecture-independent header, so we can remove the ARM specific file later. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Arnd Bergmann authored
The ks8695 gpio driver has its own copy of the irq_to_gpio() function. This is completely unused in the mainline kernel after we converted all remaining users several years ago, so we can remove the definition as well. Signed-off-by:
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Arnd Bergmann authored
gpiolib has removed the irq_to_gpio() API several years ago, but the global header still provided a non-working stub. To prevent new users of this broken function from showing up, let's remove the stubs as well. Signed-off-by:
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Ralf Baechle authored
This is fallout from commit 832f5dac ("MIPS: Remove all the uses of custom gpio.h"). Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Suggested-by:
Lars-Peter Clausen <lars@metafoo.de>
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Josh Cartwright authored
The use of kmalloc() to allocate the gpio_device leaves the contained struct device object in an unknown state. Calling dev_set_name() on a struct device of unknown state can trigger the free() of an invalid pointer, as seen in the following backtrace (collected by Tony Lindgren): kfree kobject_set_name_vargs dev_set_name gpiochip_add_data omap_gpio_probe platform_drv_probe ... Reported-by:
Geert Uytterhoeven <geert+renesas@glider.be> Reported-by:
Tony Lindgren <tony@atomide.com> Tested-by:
Josh Cartwright <joshc@ni.com> Signed-off-by:
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- 16 Feb, 2016 4 commits
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Insu Yun authored
Since devm_kzalloc can be failed in memory pressure, it needs to check and return -ENOMEM Signed-off-by:
Insu Yun <wuninsu@gmail.com> Signed-off-by:
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Axel Lin authored
The .direction_output callback should set proper output level. Signed-off-by:
Axel Lin <axel.lin@ingics.com> Signed-off-by:
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Axel Lin authored
The .direction_output callback should set proper output level. Signed-off-by:
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Linus Walleij authored
My left hand merges code to privatize the descriptor handling while my right hand merges drivers that poke around and disrespect with the same gpiolib internals. So let's expose the proper APIs for drivers to ask the gpiolib core if a line is marked as open drain or open source and get some order around things so this driver compiles again. Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Nicolas Saenz Julienne <nicolassaenzj@gmail.com> Signed-off-by:
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- 15 Feb, 2016 15 commits
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Nicholas Krause authored
This fixes a possible NULL pointer deference in the function, davinci_gpio_probe due to the function, gpio2regs being able to return a NULL pointer if it rans to get the registers for the gpio devices on a davinci board. Furthermore if this does arise return -ENXIO to signal callers that this case has arisen and avoiding setting the regs or other pointer values on the Signed-off-by:
Nicholas Krause <xerofoify@gmail.com> Reviewed-by:
Alexandre Courbot <acourbot@nvidia.com> Signed-off-by:
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Bjorn Helgaas authored
asm/gpio.h is included only by linux/gpio.h, and then only when the arch selects ARCH_HAVE_CUSTOM_GPIO_H. Only the following arches select it: arm avr32 blackfin m68k (COLDFIRE only) sh unicore32. Remove the unused asm/gpio.h files for the arches that do not select ARCH_HAVE_CUSTOM_GPIO_H. This is a follow-on to 7563bbf8 ("gpiolib/arches: Centralise bolierplate asm/gpio.h"). Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Acked-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
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Bjorn Helgaas authored
Most arches have an asm/gpio.h that merely includes linux/gpio.h. The others select ARCH_HAVE_CUSTOM_GPIO_H, and when that's selected, linux/gpio.h includes asm/gpio.h. Therefore, code should include linux/gpio.h instead of including asm/gpio.h directly. Remove includes of asm/gpio.h, adding an include of linux/gpio.h when necessary. This is a follow-on to 7563bbf8 ("gpiolib/arches: Centralise bolierplate asm/gpio.h"). Signed-off-by:
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Julien Grossholtz authored
No flags are required for bgpio_init in the TS-4800 gpio driver. This patch set zero instead. The driver will have the same behaviour since the & operator between the flags already resulted to zero. Fixes: 5041e791 ("gpio: add TS-4800 fpga GPIO support") Signed-off-by:
Julien Grossholtz <julien.grossholtz@savoirfairelinux.com> Signed-off-by:
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Linus Walleij authored
We move to manage this pointer under gpiolib control rather than leave it in the subdevice's gpio_chip. We can not NULL it after gpiochip_remove so at to keep things tight. Signed-off-by: -
Linus Walleij authored
Instead of keeping this reference to the pin ranges in the client driver-supplied gpio_chip, move it to the internal gpio_device as the drivers have no need to inspect this. Signed-off-by: -
Linus Walleij authored
This code is poking around in the gpio_chip:s internal structures to achieve some kind of pin to GPIO mappings. - It is wrong to poke around in these structs and the pinctrl maintainer was stupid to let it pass unnoticed, mea culpa. - The right interface to use is gpiochip_add_pin_range() - The code appears unused: the pin control part of the driver is not adding any ranges, so we're iterating over an empty list. Maybe it is poking around in some other pin controllers GPIO ranges, and that's just totally wrong, again use gpiochip_add_pin_range() and specify the right pin controller. Cc: Barry Song <baohua@kernel.org> Cc: Guoying Zhang <Guoying.Zhang@csr.com> Cc: Wei Chen <Wei.Chen@csr.com> Signed-off-by: -
William Breathitt Gray authored
By the time request_region is called in the WinSystems WS16C48 GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Signed-off-by:
William Breathitt Gray <vilhelm.gray@gmail.com> Reviewed-by:
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William Breathitt Gray authored
By the time request_region is called in the SMSC SCH311x GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Signed-off-by:
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William Breathitt Gray authored
By the time request_region is called in the Intel ICH series GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Cc: Peter Tyser <ptyser@xes-inc.com> Signed-off-by:
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William Breathitt Gray authored
By the time request_region is called in the AMD 8111 GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Signed-off-by:
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William Breathitt Gray authored
By the time request_region is called in the ACCES 104-IDIO-16 GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Signed-off-by:
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William Breathitt Gray authored
By the time request_region is called in the ACCES 104-IDI-48 GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Signed-off-by:
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William Breathitt Gray authored
By the time request_region is called in the ACCES 104-DIO-48E GPIO driver, a corresponding device structure has already been allocated. The devm_request_region function should be used to help simplify the cleanup code and reduce the possible points of failure. Signed-off-by:
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William Breathitt Gray authored
The GPIO driver copyright boilerplate lacks the "or later" verbiage regarding GPL compliant distribution. The MODULE_LICENSE string should reflect the actual copyright license terms used. Signed-off-by:
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- 11 Feb, 2016 7 commits
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Linus Walleij authored
Every time a descriptor is retrieved from the gpiolib, we issue module_get() to reference count the module supplying the GPIOs. We also need to call device_get() and device_put() as we also reference the backing gpio_device when doing this. Since the sysfs GPIO interface is using gpiod_get() this will also reference count the sysfs requests until all GPIOs are unexported. Signed-off-by: -
Linus Walleij authored
Some information about the GPIO chip need to stay around also after the gpio_chip has been removed and only the gpio_device persist. The base and ngpio are such things, for example we don't want a new chip arriving to overlap the number space of a dangling gpio_device, and the chardev may still query the device for the number of lines etc. Note that the code that assigns base and insert gpio_device into the global list no longer check for a missing gpio_chip: we respect the number space allocated by any other gpio_device. As a consequence of the gdev being referenced directly from the gpio_desc, we need to verify it differently from all in-kernel API calls that fall through to direct queries to the gpio_chip vtable: we first check that desc is !NULL, then that desc->gdev is !NULL, then, if desc->gdev->chip is NULL, we *BAIL OUT* without any error, so as to manage the case where operations are requested on a device that is gone. These checks were non-uniform and partly missing in the past: so to simplify: create the macros VALIDATE_DESC() that will return -EINVAL if the desc or desc->gdev is missing and just 0 if the chip is gone, and conversely VALIDATE_DESC_VOID() for the case where the function does not return an error. By using these macros, we get warning messages about missing gdev with reference to the right function in the kernel log. Despite the macro business this simplifies the code and make it more readable than if we copy/paste the same descriptor checking code into all code ABI call sites (IMHO). Signed-off-by: -
Linus Walleij authored
This kind of hacks disturbs the refactoring of the gpiolib. The descriptor table belongs to the gpiolib, if we want to know something about something in it, use or define the proper accessor functions. Let's add this gpiochip_lins_is_irq() to do what the sunxi driver is trying at so we can privatize the descriptors properly. Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Signed-off-by: -
Linus Walleij authored
We need gpio_device to hold the descriptors so that they can be lifecycled with the struct gpio_device held from userspace. Move the descriptor array into gpio_device. Also rename it from "desc" (singularis) to "descs" (pluralis) to reflect the fact that it is an array. Signed-off-by: -
Linus Walleij authored
Since gpio_device is the struct that survives if the backing gpio_chip is removed, move the sysfs mock device to this state container so it becomes part of the dangling state of the GPIO device on removal. Signed-off-by: -
Linus Walleij authored
When the device core reference count for the device goes to 0 and it calls .release() we free resources and so can also finally free up the GPIO state container, struct gpio_device. Signed-off-by: -
Nicolas Saenz Julienne authored
Driver for the GPIO block found in ti's tps65218 pmics. The device has two GPIOs and one GPO pin which can be configured as follows: GPIO1: -general-purpose, open-drain output controlled by GPO1 user bit and/or sequencer -DDR3 reset input signal from SOC. Signal is either latched or passed-trough to GPO2 pin. See below for details. GPO2: -general-purpose output controlled by GPO2 user bit -DDR3 reset output signal. Signal is controlled by GPIO1 and PGOOD. See below for details. -Output buffer can be configured as open-drain or push-pull. GPIO3: -general-purpose, open-drain output controlled by GPO3 user bit and/or sequencer -reset input-signal for DCDC1 and DCDC2. The input configurations are not meant to be used by the user so the driver only offers GPOs. v2: Added request routine that evaluates the fw config flags and removed module owner v3: Added .direction_input() routine, and took care of all Linus Walleij suggestions (clamp to bool, use proper include) Signed-off-by:
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- 10 Feb, 2016 1 commit
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Andrew F. Davis authored
Add driver for TI TPIC2810 8-Bit LED Driver with I2C Interface. The TPIC2810 has 8 open-drain outputs that can but used to drive LEDs and other low-side switched resistive loads. Signed-off-by:
Andrew F. Davis <afd@ti.com> Signed-off-by:
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