diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2010-10-01 13:37:13 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2010-10-23 11:48:47 +0900 |
| commit | 4b46fbba607ef99f1aab3b77bfc1dc25464df5a6 (patch) | |
| tree | 8abce026b2f489ffe94982e73b05884d4db9cd3c /arch/arm/plat-samsung | |
| parent | fe0cdec8bad919fd91cd344123906a55f3857209 (diff) | |
ARM: SAMSUNG: Add GPIO configuration for a range of pins
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>
Diffstat (limited to 'arch/arm/plat-samsung')
| -rw-r--r-- | arch/arm/plat-samsung/gpio-config.c | 15 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-cfg.h | 13 |
2 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c index e3d41eaed1f..fa180dcc41c 100644 --- a/arch/arm/plat-samsung/gpio-config.c +++ b/arch/arm/plat-samsung/gpio-config.c @@ -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); diff --git a/arch/arm/plat-samsung/include/plat/gpio-cfg.h b/arch/arm/plat-samsung/include/plat/gpio-cfg.h index 1c6b92947c5..6e117dc2709 100644 --- a/arch/arm/plat-samsung/include/plat/gpio-cfg.h +++ b/arch/arm/plat-samsung/include/plat/gpio-cfg.h @@ -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 |