Linus Walleij b08ea35a32 gpio: add a data pointer to gpio_chip ... This adds a void * pointer to gpio_chip so that driver can assign and retrieve some states. This is done to get rid of container_of() calls for gpio_chips embedded inside state containers, so we can remove the need to have the gpio_chip or later (planned) struct gpio_device be dynamically allocated at registration time, so that its struct device can be properly reference counted and not bound to its parent device (e.g. a platform_device) but instead live on after unregistration if it is opened by e.g. a char device or sysfs. The data is added with the new function gpiochip_add_data() and for compatibility we add static inline wrapper function gpiochip_add() that will call gpiochip_add_data() with NULL as argument. The latter will be removed once we have exorcised gpiochip_add() from the kernel. gpiochip_get_data() is added as a static inline accessor for drivers to quickly get their data out. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>		2016-01-05 11:20:12 +01:00
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consumer.h	gpio: keep the GPIO line names internal	2015-09-24 10:48:53 -07:00
driver.h	gpio: add a data pointer to gpio_chip	2016-01-05 11:20:12 +01:00
machine.h	gpiolib: Add support for removing registered consumer lookup table	2015-07-21 09:21:40 +02:00