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ARM: SAMSUNG: Add s3c_gpio_cfgall_range() function

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Add a function to configure a range of GPIOs function and
pull in one go, mainly for the SDHCI and framebuffer helpers
which tend to do this.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
[kgene.kim@samsung.com: Fix small comments]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Ben Dooks 2010-10-01 16:34:34 +09:00 committed by Kukjin Kim
parent ce5d3ac1f5
commit 5459148b09
2 changed files with 35 additions and 0 deletions
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16
arch/arm/plat-samsung/gpio-config.c
View File

@ -56,6 +56,22 @@ int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr,
}
EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range);
int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr,
unsigned int cfg, s3c_gpio_pull_t pull)
{
int ret;
for (; nr > 0; nr--, start++) {
s3c_gpio_setpull(start, pull);
ret = s3c_gpio_cfgpin(start, cfg);
if (ret != 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range);
unsigned s3c_gpio_getcfg(unsigned int pin)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);

19
arch/arm/plat-samsung/include/plat/gpio-cfg.h
View File

@ -153,6 +153,25 @@ extern int s3c_gpio_setpull(unsigned int pin, s3c_gpio_pull_t pull);
*/
extern s3c_gpio_pull_t s3c_gpio_getpull(unsigned int pin);
/* configure `all` aspects of an gpio */
/**
* s3c_gpio_cfgall_range() - configure range of gpio functtion and pull.
* @start: The gpio number to start at.
* @nr: The number of gpio to configure from @start.
* @cfg: The configuration to use
* @pull: The pull setting to use.
*
* Run s3c_gpio_cfgpin() and s3c_gpio_setpull() over the gpio range starting
* @gpio and running for @size.
*
* @sa s3c_gpio_cfgpin
* @sa s3c_gpio_setpull
* @sa s3c_gpio_cfgpin_range
*/
extern int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr,
unsigned int cfg, s3c_gpio_pull_t pull);
/* Define values for the drvstr available for each gpio pin.
*
* These values control the value of the output signal driver strength,