kernel/linux.git/include/linux/gpio/driver.h, branch v3.16.50

gpio: drop retval check enforcing from gpiochip_remove()

2017-11-11T13:33:45+00:00

commit 14c8a620ba436511b1347c592633befa49535176 upstream. As we start to decomission the return value from gpiochip_remove() the compilers emit warnings due to the function being tagged __must_check. So drop this until we remove the return value altogether. Cc: Abdoulaye Berthe Suggested-by: Stephen Rothwell Signed-off-by: Linus Walleij Signed-off-by: Arnd Bergmann Signed-off-by: Ben Hutchings

gpio: support threaded interrupts in irqchip helpers

2014-04-28T19:35:07+00:00

Some off-chip GPIO expanders need to be communicated by I2C or SPI traffic, but may still support IRQs. By the sleeping nature of such buses, such IRQ handlers need to be threaded. Support such handlers in the gpiochip irqchip helpers by flagging IRQs as threaded if the .can_sleep property of the gpiochip is true. Helpfully deny registration of chained IRQ handlers if the .can_sleep property is set, as such chips will invariably need a nested handler rather than a chained handler. Cc: Thomas Gleixner Signed-off-by: Linus Walleij

gpio: unmap gpio irqs properly

2014-03-28T19:42:01+00:00

When using the irqchip helper inside the gpiolib, make sure the IRQs are unmapped/disposed before the irqdomain is removed as part of removing the gpiochip. Signed-off-by: Linus Walleij

gpio: add IRQ chip helpers in gpiolib

2014-03-26T09:31:21+00:00

This provides a function gpiochip_irqchip_add() to set up an irqchip for a GPIO controller, and a function gpiochip_set_chained_irqchip() to chain it to a parent irqchip. Most GPIOs are of the type where a number of lines form a cascaded interrupt controller chained onto the primary system interrupt controller (or further down the chain) so let's add this helper and factor the code to request the lines to be used as IRQs, the .to_irq() function and the irqdomain into the core as well. Acked-by: Thomas Gleixner Acked-by: Alexandre Courbot Signed-off-by: Linus Walleij

gpiolib: add gpiochip_get_desc() driver function

2014-02-12T16:11:35+00:00

Some drivers dealing with a gpio_chip might need to act on its descriptors directly; one example is pinctrl drivers that need to lock a GPIO for being used as IRQ using gpiod_lock_as_irq(). This patch exports a gpiochip_get_desc() function that returns the GPIO descriptor at the requested index. It also sweeps the gpio_to_chip() function out of the consumer interface since any holder of a gpio_chip reference can manipulate its GPIOs way beyond what a consumer should be allowed to do. As a result, gpio_chip is not visible anymore to simple GPIO consumers. Signed-off-by: Alexandre Courbot Reviewed-by: Mika Westerberg Reviewed-by: Jean-Jacques Hiblot Signed-off-by: Linus Walleij

gpiolib: convert gpiod_lookup description to kernel-doc

2013-12-09T13:18:33+00:00

The patch moves description of the fields to the top of struct definition and converts them to the kernel-doc format. There is no functional change. Signed-off-by: Andy Shevchenko Acked-by: Alexandre Courbot Reviewed-by: Mika Westerberg Signed-off-by: Linus Walleij

gpio: better lookup method for platform GPIOs

2013-12-09T13:05:51+00:00

Change the format of the platform GPIO lookup tables to make them less confusing and improve lookup efficiency. The previous format was a single linked-list that required to compare the device name and function ID of every single GPIO defined for each lookup. Switch that to a list of per-device tables, so that the lookup can be done in two steps, omitting the GPIOs that are not relevant for a particular device. The matching rules are now defined as follows: - The device name must match *exactly*, and can be NULL for GPIOs not assigned to a particular device, - If the function ID in the lookup table is NULL, the con_id argument of gpiod_get() will not be used for lookup. However, if it is defined, it must match exactly. - The index must always match. Signed-off-by: Alexandre Courbot Acked-by: Mika Westerberg Reviewed-by: Andy Shevchenko Signed-off-by: Linus Walleij

Merge tag 'v3.13-rc3' into devel

2013-12-09T13:04:37+00:00

Linux 3.13-rc3

gpio/pinctrl: make gpio_chip members typed boolean

2013-12-04T13:42:46+00:00

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

gpiolib: add missing declarations

2013-12-03T12:10:47+00:00

Add declaration of 'struct of_phandle_args' to avoid the following warning: In file included from arch/arm/mach-tegra/board-paz00.c:21:0: include/linux/gpio/driver.h:102:17: warning: 'struct of_phandle_args' declared inside parameter list include/linux/gpio/driver.h:102:17: warning: its scope is only this definition or declaration, which is probably not what you want Also proactively add other definitions/includes that could be missing in other contexts. Signed-off-by: Alexandre Courbot Reported-by: Stephen Warren Reviewed-by: Mika Westerberg Signed-off-by: Linus Walleij