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ARM: SAMSUNG: Add GPIO configuration for a range of pins

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Add s3c_gpio_cfgpin_range() to configure a range of pins to the given
value. This is useful for a number of blocks where the pins are in order
and saves multiple calls to s3c_gpio_cfgpin().

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Ben Dooks 2010-10-01 13:37:13 +09:00 committed by Kukjin Kim
parent fe0cdec8ba
commit 4b46fbba60
2 changed files with 28 additions and 0 deletions
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15
arch/arm/plat-samsung/gpio-config.c
View File

@ -41,6 +41,21 @@ int s3c_gpio_cfgpin(unsigned int pin, unsigned int config)
}
EXPORT_SYMBOL(s3c_gpio_cfgpin);
int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr,
unsigned int cfg)
{
int ret;
for (; nr > 0; nr--, start++) {
ret = s3c_gpio_cfgpin(start, cfg);
if (ret != 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range);
unsigned s3c_gpio_getcfg(unsigned int pin)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);

13
arch/arm/plat-samsung/include/plat/gpio-cfg.h
View File

@ -108,6 +108,19 @@ extern int s3c_gpio_cfgpin(unsigned int pin, unsigned int to);
*/
extern unsigned s3c_gpio_getcfg(unsigned int pin);
/**
* s3c_gpio_cfgpin_range() - Change the GPIO function for configuring pin range
* @start: The pin number to start at
* @nr: The number of pins to configure from @start.
* @cfg: The configuration for the pin's function
*
* Call s3c_gpio_cfgpin() for the @nr pins starting at @start.
*
* @sa s3c_gpio_cfgpin.
*/
extern int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr,
unsigned int cfg);
/* Define values for the pull-{up,down} available for each gpio pin.
*
* These values control the state of the weak pull-{up,down} resistors