diff options
| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2010-06-02 08:50:28 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-06-17 01:27:35 +0400 |
| commit | 6f9a974cf6fdd189ff383c8b75c22c65dab20b52 (patch) | |
| tree | ec1e142b40646a1fced854f11044eac9ccf82c20 /arch/arm | |
| parent | 81a3c2989227e025b715e18299431395083b39e5 (diff) | |
| download | linux-6f9a974cf6fdd189ff383c8b75c22c65dab20b52.tar.xz | |
ARM: 6154/1: nomadik-gpio: refactor nmk_gpio_set_mode
Extract out a portion of nmk_gpio_set_mode() that can be called with the
lock already held. This will be used from the pincfg API.
Cc: Alessandro Rubini <rubini@unipv.it>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/plat-nomadik/gpio.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c index a678e887e0fe..7b7393f96a9c 100644 --- a/arch/arm/plat-nomadik/gpio.c +++ b/arch/arm/plat-nomadik/gpio.c @@ -46,6 +46,22 @@ struct nmk_gpio_chip { u32 edge_falling; }; +static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip, + unsigned offset, int gpio_mode) +{ + u32 bit = 1 << offset; + u32 afunc, bfunc; + + afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit; + bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit; + if (gpio_mode & NMK_GPIO_ALT_A) + afunc |= bit; + if (gpio_mode & NMK_GPIO_ALT_B) + bfunc |= bit; + writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA); + writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB); +} + static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip, unsigned offset, enum nmk_gpio_slpm mode) { @@ -139,23 +155,13 @@ int nmk_gpio_set_mode(int gpio, int gpio_mode) { struct nmk_gpio_chip *nmk_chip; unsigned long flags; - u32 afunc, bfunc, bit; nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio)); if (!nmk_chip) return -EINVAL; - bit = 1 << (gpio - nmk_chip->chip.base); - spin_lock_irqsave(&nmk_chip->lock, flags); - afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit; - bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit; - if (gpio_mode & NMK_GPIO_ALT_A) - afunc |= bit; - if (gpio_mode & NMK_GPIO_ALT_B) - bfunc |= bit; - writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA); - writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB); + __nmk_gpio_set_mode(nmk_chip, gpio - nmk_chip->chip.base, gpio_mode); spin_unlock_irqrestore(&nmk_chip->lock, flags); return 0; |