drivers/gpio/db8500_gpio.c

2  * Code ported from Nomadik GPIO driver in ST-Ericsson Linux kernel code.
4  * copy-paste it to U-Boot.
11  * Ported to U-Boot by:
29  * The GPIO module in the db8500 Systems-on-Chip is an
37 #define GPIO_BLOCK(pin)		(((pin + GPIO_PINS_PER_BLOCK) >> 5) - 1)
83 /* Can only be called from config_pin. Don't configure alt-mode directly */
102  * db8500_gpio_set_pull() - enable/disable pull up/down on a gpio
104  * @pull: one of DB8500_GPIO_PULL_DOWN, DB8500_GPIO_PULL_UP,
107  * Enables/disables pull up/down on a specified pin.  This only takes effect if
111  * NOTE: If enabling the pull up/down, the caller must ensure that the GPIO is
115 void db8500_gpio_set_pull(unsigned gpio, enum db8500_gpio_pull pull)  in db8500_gpio_set_pull()  argument
123 	if (pull == DB8500_GPIO_PULL_NONE)  in db8500_gpio_set_pull()
129 	if (pull == DB8500_GPIO_PULL_UP)  in db8500_gpio_set_pull()
131 	else if (pull == DB8500_GPIO_PULL_DOWN)  in db8500_gpio_set_pull()
176  * config_pin - configure a pin's mux attributes
179  * Configures a pin's mode (alternate function or GPIO), its pull up status,
181  * usually one of the SoC specific macros defined in mach/<soc>-pins.h.  These
186  * side-effects.  The gpio can be manipulated later using standard GPIO API
192 	int pull = PIN_PULL(cfg);  in config_pin()  local
201 		db8500_gpio_set_pull(pin, pull);  in config_pin()
208  * db8500_config_pins - configure several pins at once