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authorRabin Vincent <rabin.vincent@stericsson.com>2010-06-02 06:50:28 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-06-16 23:27:35 +0200
commit6f9a974cf6fdd189ff383c8b75c22c65dab20b52 (patch)
treeec1e142b40646a1fced854f11044eac9ccf82c20 /arch/arm/plat-nomadik/gpio.c
parentARM: 6149/1: nomadik-gpio: add function to configure sleep mode behaviour (diff)
downloadlinux-6f9a974cf6fdd189ff383c8b75c22c65dab20b52.tar.xz
linux-6f9a974cf6fdd189ff383c8b75c22c65dab20b52.zip
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/plat-nomadik/gpio.c')
-rw-r--r--arch/arm/plat-nomadik/gpio.c28
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;