diff options
| author | Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com> | 2011-01-06 07:04:33 +0300 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-01-06 08:09:19 +0300 |
| commit | 0536d0d087c264f0edbb911fca6fff39bb2eb71b (patch) | |
| tree | 0aba95a46e004efbdc5f095366f7016898fb468f /arch/arm/plat-samsung | |
| parent | 479c4f4aba27318d64698867a18865d29e3287a6 (diff) | |
| download | linux-0536d0d087c264f0edbb911fca6fff39bb2eb71b.tar.xz | |
ARM: S3C2443: Implement GPIO pull-up/down configuration methods
S3C2443 has two-bits pull-up/pull-down configuration fields in GPIO
registers, but values are differ from other SoCs with two-bits
configuration. gpio-cfg-helpers.h already has prototypes for
s3c2443-style pull-up/down methods, so implement them.
Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-samsung')
| -rw-r--r-- | arch/arm/plat-samsung/Kconfig | 6 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/gpio-config.c | 42 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h | 2 |
3 files changed, 49 insertions, 1 deletions
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index dcd6eff4ee53..4ecb15531b92 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -95,6 +95,12 @@ config S3C_GPIO_PULL_UPDOWN help Internal configuration to enable the correct GPIO pull helper +config S3C_GPIO_PULL_S3C2443 + bool + select S3C_GPIO_PULL_UPDOWN + help + Internal configuration to enable the correct GPIO pull helper for S3C2443-style GPIO + config S3C_GPIO_PULL_DOWN bool help diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c index 0aa32f242ee4..1c0b0401594b 100644 --- a/arch/arm/plat-samsung/gpio-config.c +++ b/arch/arm/plat-samsung/gpio-config.c @@ -278,6 +278,48 @@ s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip, pup &= 0x3; return (__force s3c_gpio_pull_t)pup; } + +#ifdef CONFIG_S3C_GPIO_PULL_S3C2443 +int s3c_gpio_setpull_s3c2443(struct s3c_gpio_chip *chip, + unsigned int off, s3c_gpio_pull_t pull) +{ + switch (pull) { + case S3C_GPIO_PULL_NONE: + pull = 0x01; + break; + case S3C_GPIO_PULL_UP: + pull = 0x00; + break; + case S3C_GPIO_PULL_DOWN: + pull = 0x02; + break; + } + return s3c_gpio_setpull_updown(chip, off, pull); +} + +s3c_gpio_pull_t s3c_gpio_getpull_s3c2443(struct s3c_gpio_chip *chip, + unsigned int off) +{ + s3c_gpio_pull_t pull; + + pull = s3c_gpio_getpull_updown(chip, off); + + switch (pull) { + case 0x00: + pull = S3C_GPIO_PULL_UP; + break; + case 0x01: + case 0x03: + pull = S3C_GPIO_PULL_NONE; + break; + case 0x02: + pull = S3C_GPIO_PULL_DOWN; + break; + } + + return pull; +} +#endif #endif #if defined(CONFIG_S3C_GPIO_PULL_UP) || defined(CONFIG_S3C_GPIO_PULL_DOWN) diff --git a/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h b/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h index 0d2c5703f1ee..5603db0b79bc 100644 --- a/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h +++ b/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h @@ -244,7 +244,7 @@ extern int s3c_gpio_setpull_s3c2443(struct s3c_gpio_chip *chip, * This helper function reads the state of the pull-{up,down} resistor for the * given GPIO in the same case as s3c_gpio_setpull_upown. */ -extern s3c_gpio_pull_t s3c_gpio_getpull_s3c24xx(struct s3c_gpio_chip *chip, +extern s3c_gpio_pull_t s3c_gpio_getpull_s3c2443(struct s3c_gpio_chip *chip, unsigned int off); #endif /* __PLAT_GPIO_CFG_HELPERS_H */ |