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path: root/drivers/gpio/gpio-74x164.c (follow)
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* Merge tag 'gpio-v4.16-1' of ↵Linus Torvalds2018-01-311-3/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO updates from Linus Walleij: "The is the bulk of GPIO changes for the v4.16 kernel cycle. It is pretty calm this time around I think. I even got time to get to things like starting to clean up header includes. Core changes: - Disallow open drain and open source flags to be set simultaneously. This doesn't make electrical sense, and would the hardware actually respond to this setting, the result would be short circuit. - ACPI GPIO has a new core infrastructure for handling quirks. The quirks are there to deal with broken ACPI tables centrally instead of pushing the work to individual drivers. In the world of BIOS writers, the ACPI tables are perfect. Until they find a mistake in it. When such a mistake is found, we can patch it with a quirk. It should never happen, the problem is that it happens. So we accomodate for it. - Several documentation updates. - Revert the patch setting up initial direction state from reading the device. This was causing bad things for drivers that can't read status on all its pins. It is only affecting debugfs information quality. - Label descriptors with the device name if no explicit label is passed in. - Pave the ground for transitioning SPI and regulators to use GPIO descriptors by implementing some quirks in the device tree GPIO parsing code. New drivers: - New driver for the Access PCIe IDIO 24 family. Other: - Major refactorings and improvements to the GPIO mockup driver used for test and verification. - Moved the AXP209 driver over to pin control since it gained a pin control back-end. These patches will appear (with the same hashes) in the pin control pull request as well. - Convert the onewire GPIO driver w1-gpio to use descriptors. This is merged here since the W1 maintainers send very few pull requests and he ACKed it. - Start to clean up driver headers using <linux/gpio.h> to just use <linux/gpio/driver.h> as appropriate" * tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (103 commits) gpio: Timestamp events in hardirq handler gpio: Fix kernel stack leak to userspace gpio: Fix a documentation spelling mistake gpio: Documentation update gpiolib: remove redundant initialization of pointer desc gpio: of: Fix NPE from OF flags gpio: stmpe: Delete an unnecessary variable initialisation in stmpe_gpio_probe() gpio: stmpe: Move an assignment in stmpe_gpio_probe() gpio: stmpe: Improve a size determination in stmpe_gpio_probe() gpio: stmpe: Use seq_putc() in stmpe_dbg_show() gpio: No NULL owner gpio: stmpe: i2c transfer are forbiden in atomic context gpio: davinci: Include proper header gpio: da905x: Include proper header gpio: cs5535: Include proper header gpio: crystalcove: Include proper header gpio: bt8xx: Include proper header gpio: bcm-kona: Include proper header gpio: arizona: Include proper header gpio: amd8111: Include proper header ...
| * gpio: 74x174: Include proper headersLinus Walleij2018-01-131-3/+2
| | | | | | | | | | | | | | | | This driver has no business including <linux/gpio.h> or <linux/of_gpio.h>. Cut them and include <linux/gpio/driver.h> and <linux/gpio/consumer.h> which is it they really needs. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: 74x164: Fix crash during .remove()Geert Uytterhoeven2017-11-301-2/+2
|/ | | | | | | | | | | | | | | | | | | | | | | | 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>
* gpio: 74x164: Introduce 'enable-gpios' propertyFabio Estevam2017-08-141-0/+10
| | | | | | | | | | | 74HC595 has an /OE (output enable) pin that can be controlled by a GPIO. Introduce an optional property called 'enable-gpios' that allows controlling the /OE pin. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Use spi_write() helper instead of open codingGeert Uytterhoeven2016-06-231-7/+2
| | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: add dt support for nxp's 74x594Nicolas Saenz Julienne2016-03-311-0/+1
| | | | | | | | | The chip is also an 8 bit shift register which works out of the box as a GPO expander with this patch Signed-off-by: Nicolas Saenz Julienne <nicolassaenzj@gmail.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Implement gpiochip.set_multiple()Geert Uytterhoeven2016-03-301-0/+24
| | | | | | | | This allows to set multiple outputs using a single SPI transfer. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Phil Reid <preid@electromag.com.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: use gpiochip data pointerLinus Walleij2016-01-051-8/+3
| | | | | | | | | 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: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Use a single SPI transfer instead of multiple transfersGeert Uytterhoeven2015-12-101-32/+15
| | | | | | | | | | | | | | | | | | | | Currently the 74x164 driver assembles an SPI message from an array of one-byte SPI transfers, one for each daisy-chained shift register, as the first byte sent will end up in the last register. This array is allocated and deallocated on each GPIO write access. By storing the data in the internal buffer in reverse order, we can use a single SPI transfer with the internal buffer directly, simplifying the code a lot, and avoiding memory (de)allocations. This also avoids transient values on the GPIO outputs when using an SPI master that cannot keep the hardware chip select asserted in between multiple transfers (and would need cs-gpios for proper operation). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Mark Brown <broonie@kernel.org> [Rebased changing .dev to .parent] Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Allocate buffer with gen_74x164_chipGeert Uytterhoeven2015-12-101-12/+11
| | | | | | | | | | By moving the internal buffer to the end of struct gen_74x164_chip and converting it from a pointer to a zero-sized array, it can be allocated together with gen_74x164_chip, reducing the number of managed allocations. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: change member .dev to .parentLinus Walleij2015-11-191-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The name .dev in a struct is normally reserved for a struct device that is let us say a superclass to the thing described by the struct. struct gpio_chip stands out by confusingly using a struct device *dev to point to the parent device (such as a platform_device) that represents the hardware. As we want to give gpio_chip:s real devices, this is not working. We need to rename this member to parent. This was done by two coccinelle scripts, I guess it is possible to combine them into one, but I don't know such stuff. They look like this: @@ struct gpio_chip *var; @@ -var->dev +var->parent and: @@ struct gpio_chip var; @@ -var.dev +var.parent and: @@ struct bgpio_chip *var; @@ -var->gc.dev +var->gc.parent Plus a few instances of bgpio that I couldn't figure out how to teach Coccinelle to rewrite. This patch hits all over the place, but I *strongly* prefer this solution to any piecemal approaches that just exercise patch mechanics all over the place. It mainly hits drivers/gpio and drivers/pinctrl which is my own backyard anyway. Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Rafał Miłecki <zajec5@gmail.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Alek Du <alek.du@intel.com> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Jiri Kosina <jkosina@suse.cz> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* spi: Drop owner assignment from spi_driversAndrew F. Davis2015-10-281-1/+0
| | | | | | | | | An spi_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
* gpio: remove all usage of gpio_remove retval in driver/gpioabdoulaye berthe2014-07-221-5/+3
| | | | | Signed-off-by: abdoulaye berthe <berthe.ab@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Driver cleanupAlexander Shiyan2013-12-121-27/+16
| | | | | | | | | | | - Removed excess "spi" field from private data. - Removed excess check for spi_get_drvdata() in remove(). - Removed unneeded message in remove(). - Simplify error path in probe(). - Fixed warnings by scripts/checkfile.pl. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Remove non-DT supportAlexander Shiyan2013-12-121-13/+1
| | | | | | | | | | | | Commit 20bc4d5d565159eb2b942bf4b7fae86fba94e32c (gpio: 74x164: Add support for the daisy-chaining) introduce check for DT for the driver, so driver cannot be used without DT. There are no in-tree users of this driver, so remove non-DT support completely. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio/pinctrl: make gpio_chip members typed booleanLinus Walleij2013-12-041-1/+1
| | | | | | | | | | | This switches the two members of struct gpio_chip that were defined as unsigned foo:1 to bool, because that is indeed what they are. Switch all users in the gpio and pinctrl subsystems to assign these values with true/false instead of 0/1. The users outside these subsystems will survive since true/false is 1/0, atleast we set some kind of more strict typing example. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: gpio-74x164: Remove redundant of_match_ptrSachin Kamat2013-09-231-1/+1
| | | | | | | | 'gen_74x164_dt_ids' is always compiled in. Hence the macro is not necessary. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: gpio-74x164: Remove redundant spi_set_drvdataSachin Kamat2013-09-231-3/+0
| | | | | | | | Driver core sets driver data to NULL upon failure or remove. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: use dev_get_platdata()Jingoo Han2013-08-161-1/+1
| | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: use spi_get_drvdata() and spi_set_drvdata()Jingoo Han2013-03-271-4/+4
| | | | | | | | | Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: remove use of __devexitBill Pemberton2012-11-281-1/+1
| | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Grant Likely <grant.likely@secretlab.ca> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Peter Tyser <ptyser@xes-inc.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* gpio: remove use of __devinitBill Pemberton2012-11-281-1/+1
| | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* gpio: remove use of __devexit_pBill Pemberton2012-11-281-1/+1
| | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Peter Tyser <ptyser@xes-inc.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* gpio-74x164: Fix buffer allocation sizeRoland Stigge2012-10-161-1/+1
| | | | | | | | The new registers handling in the gpio-74x164 driver allocates chip->registers * 8 bytes where only one byte per register is necessary. This patch fixes this. Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Add support for the daisy-chainingMaxime Ripard2012-09-111-7/+61
| | | | | | | | | | | | | | The shift registers have an output pin that, when enabled, propagates the values of its internal register to the pins. If another value comes to the register while the output pin is disabled, this new value will makae the older shift into the next register in the chain. This patch adds support for daisy-chaining the registers, using the regular SPI chip select mechanism to manage the output pin, and the registers-number dt property to set the number of chained registers. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Add device tree supportMaxime Ripard2012-09-071-0/+7
| | | | | | | Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Florian Fainelli <florian@openwrt.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Use dynamic gpio number assignment if no pdata is presentMaxime Ripard2012-09-071-7/+6
| | | | | | Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Use devm_kzallocMaxime Ripard2012-09-071-5/+3
| | | | | | | Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Florian Fainelli <florian@openwrt.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: 74x164: Use module_spi_driver boiler plate functionMaxime Ripard2012-09-071-12/+1
| | | | | | | Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Florian Fainelli <florian@openwrt.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* drivers/gpio: Fix drivers who are implicit users of module.hPaul Gortmaker2011-11-011-0/+1
| | | | | | | | A pending cleanup will mean that module.h won't be implicitly everywhere anymore. Make sure the modular drivers in gpio are actually calling out for <module.h> explicitly in advance. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* gpio/74x164: fix clash with gpiolib namespaceLinus Walleij2011-06-131-3/+3
| | | | | | | | | | | | The 74x164 GPIO driver has a static inline helper called gpio_to_chip which clashes with the gpiolib namespace if we try to expose the function with the same name from gpiolib, and it's still confusing even if we don't do that. So rename it to gpio_to_74x164_chip(). Reported-by: H Hartley Sweeten <hartleys@visionengravers.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* gpio: reorganize driversGrant Likely2011-06-061-0/+177
Sort the gpio makefile and enforce the naming convention gpio-*.c for gpio drivers. v2: cleaned up filenames in Kconfig and comment blocks v3: fixup use of BASIC_MMIO to GENERIC_GPIO for mxc Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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