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gpio: add flags to export GPIOs when requesting

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Introduce new flags to automatically export GPIOs when using the convenience
functions gpio_request_one() or gpio_request_array(). This eases support for
custom boards where lots of GPIOs need to be exported for customer
applications.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Wolfram Sang 2011-12-13 18:34:01 +01:00 • committed by Grant Likely
parent dd775ae254
commit fc3a1f04f5
3 changed files with 19 additions and 1 deletions
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5
include/linux/gpio.h
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@ -20,6 +20,11 @@
/* Gpio pin is open source */
#define GPIOF_OPEN_SOURCE (1 << 3)
#define GPIOF_EXPORT (1 << 2)
#define GPIOF_EXPORT_CHANGEABLE (1 << 3)
#define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT)
#define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
/**
* struct gpio - a structure describing a GPIO with configuration
* @gpio: the GPIO number