diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2010-05-03 14:39:45 +0900 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2010-05-06 09:25:57 +0900 |
| commit | 1ec7269fd8b05044f2cb4059b679e053d57460f5 (patch) | |
| tree | 20addcc19fac614b2954fc1b126d9ae5ca38485e /arch/arm/plat-samsung | |
| parent | 9bbb851c7079ff670ba3fe6c7ce93bb5daa9a694 (diff) | |
ARM: S3C24XX: Add the gpio pull configuration for pull-up
Add the necessary gpio configuration helper for the devices which
have a single-bit pull-up resistor disabled.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-samsung')
| -rw-r--r-- | arch/arm/plat-samsung/gpio-config.c | 32 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h | 11 |
2 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c index c5832824e198..8aca88d6c486 100644 --- a/arch/arm/plat-samsung/gpio-config.c +++ b/arch/arm/plat-samsung/gpio-config.c @@ -164,3 +164,35 @@ s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip, return (__force s3c_gpio_pull_t)pup; } #endif + +#ifdef CONFIG_S3C_GPIO_PULL_UP +int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip, + unsigned int off, s3c_gpio_pull_t pull) +{ + void __iomem *reg = chip->base + 0x08; + u32 pup = __raw_readl(reg); + + pup = __raw_readl(reg); + + if (pup == S3C_GPIO_PULL_UP) + pup &= ~(1 << off); + else if (pup == S3C_GPIO_PULL_NONE) + pup |= (1 << off); + else + return -EINVAL; + + __raw_writel(pup, reg); + return 0; +} + +s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip, + unsigned int off) +{ + void __iomem *reg = chip->base + 0x08; + u32 pup = __raw_readl(reg); + + pup &= (1 << off); + return pup ? S3C_GPIO_PULL_NONE : S3C_GPIO_PULL_UP; +} +#endif /* CONFIG_S3C_GPIO_PULL_UP */ + 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 dda19da037ad..885e9ac642d3 100644 --- a/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h +++ b/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h @@ -146,6 +146,17 @@ extern s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip, unsigned int off); /** + * s3c_gpio_getpull_1up() - Get configuration for choice of up or none + * @chip: The gpio chip that the GPIO pin belongs to + * @off: The offset to the pin to get the configuration of. + * + * This helper function reads the state of the pull-up resistor for the + * given GPIO in the same case as s3c_gpio_setpull_1up. +*/ +extern s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip, + unsigned int off); + +/** * s3c_gpio_setpull_s3c2443() - Pull configuration for s3c2443. * @chip: The gpio chip that is being configured. * @off: The offset for the GPIO being configured. |