user/sven/linux.git/include/linux/gpio, branch v3.16.46

gpio: include linux/bug.h in interface header

2014-05-16T15:52:36Z

Today's linux-next kernel started showing build errors for the use of WARN_ON in linux/gpio/consumer.h: In file included from drivers/video/backlight/pwm_bl.c:13:0: include/linux/gpio/consumer.h: In function 'gpiod_put': include/linux/gpio/consumer.h:81:2: error: implicit declaration of function 'WARN_ON' [-Werror=implicit-function-declaration] It's not clear why this never happened before, but this patch fixes it by including the header that contains the defintion of this macro. Signed-off-by: Arnd Bergmann Acked-by: Alexandre Courbot Signed-off-by: Linus Walleij

gpio: Add helpers for optional GPIOs

2014-05-09T11:48:30Z

Introduce gpiod_get_optional() and gpiod_get_index_optional() helpers that make it easier for drivers to handle optional GPIOs. Currently in order to handle optional GPIOs, a driver needs to special case error handling for -ENOENT, such as this: gpio = gpiod_get(dev, "foo"); if (IS_ERR(gpio)) { if (PTR_ERR(gpio) != -ENOENT) return PTR_ERR(gpio); gpio = NULL; } if (gpio) { /* set up GPIO */ } With these new helpers the above is reduced to: gpio = gpiod_get_optional(dev, "foo"); if (IS_ERR(gpio)) return PTR_ERR(gpio); if (gpio) { /* set up GPIO */ } While at it, device-managed variants of these functions are also provided. Signed-off-by: Thierry Reding Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij

gpio: support threaded interrupts in irqchip helpers

2014-04-28T19:35:07Z

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

2014-03-28T19:42:01Z

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

2014-03-26T09:31:21Z

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

Merge tag 'v3.14-rc6' into devel

2014-03-14T09:26:45Z

Linux 3.14-rc6

gpiolib: add gpiochip_get_desc() driver function

2014-02-12T16:11:35Z

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

gpio: make gpiod_direction_output take a logical value

2014-02-07T08:47:02Z

The documentation was not clear about whether gpio_direction_output should take a logical value or the physical level on the output line, i.e. whether the ACTIVE_LOW status would be taken into account. This converts gpiod_direction_output to use the logical level and adds a new gpiod_direction_output_raw for the raw value. Signed-off-by: Philipp Zabel Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij

gpio: consumer.h: Move forward declarations outside #ifdef

2014-02-06T09:22:56Z

Make sure that the forward declared structs in gpio/consumer.h are also visible on the else branch of the CONFIG_GPIOLIB #ifdef. Fixes the following warnings and their associated errors when CONFIG_GPIOLIB is not selected: include/linux/gpio/consumer.h:67:14: warning: 'struct device' declared inside parameter list include/linux/gpio/consumer.h:67:14: warning: its scope is only this definition or declaration, which is probably not what you want [...] Signed-off-by: Lars-Peter Clausen Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij

gpiolib: convert gpiod_lookup description to kernel-doc

2013-12-09T13:18:33Z

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