diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-05-23 20:57:31 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-05-23 20:57:31 +0100 |
| commit | a2ab67fae1ab9226679495a8d260f4e6555efc5f (patch) | |
| tree | f7de683c9c8ff0869a7e11f1d40802145d05f5b4 /arch/arm/plat-pxa/gpio.c | |
| parent | 6d0485a99366d4e0e7e725f14995c74cb7ca4499 (diff) | |
| parent | 135cad366b4e7d6a79f6369f6cb5b721985aa62f (diff) | |
Merge branch 'for-rmk-devel' of git://git.pengutronix.de/git/imx/linux-2.6 into devel
Conflicts:
arch/arm/Kconfig
arch/arm/Makefile
Diffstat (limited to 'arch/arm/plat-pxa/gpio.c')
| -rw-r--r-- | arch/arm/plat-pxa/gpio.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/arm/plat-pxa/gpio.c b/arch/arm/plat-pxa/gpio.c index af819bf21b6..abc79d44aca 100644 --- a/arch/arm/plat-pxa/gpio.c +++ b/arch/arm/plat-pxa/gpio.c @@ -121,6 +121,8 @@ static int __init pxa_init_gpio_chip(int gpio_end) return -ENOMEM; } + memset(chips, 0, nbanks * sizeof(struct pxa_gpio_chip)); + for (i = 0, gpio = 0; i < nbanks; i++, gpio += 32) { struct gpio_chip *c = &chips[i].chip; @@ -143,6 +145,21 @@ static int __init pxa_init_gpio_chip(int gpio_end) return 0; } +/* Update only those GRERx and GFERx edge detection register bits if those + * bits are set in c->irq_mask + */ +static inline void update_edge_detect(struct pxa_gpio_chip *c) +{ + uint32_t grer, gfer; + + grer = __raw_readl(c->regbase + GRER_OFFSET) & ~c->irq_mask; + gfer = __raw_readl(c->regbase + GFER_OFFSET) & ~c->irq_mask; + grer |= c->irq_edge_rise & c->irq_mask; + gfer |= c->irq_edge_fall & c->irq_mask; + __raw_writel(grer, c->regbase + GRER_OFFSET); + __raw_writel(gfer, c->regbase + GFER_OFFSET); +} + static int pxa_gpio_irq_type(unsigned int irq, unsigned int type) { struct pxa_gpio_chip *c; @@ -181,8 +198,7 @@ static int pxa_gpio_irq_type(unsigned int irq, unsigned int type) else c->irq_edge_fall &= ~mask; - __raw_writel(c->irq_edge_rise & c->irq_mask, c->regbase + GRER_OFFSET); - __raw_writel(c->irq_edge_fall & c->irq_mask, c->regbase + GFER_OFFSET); + update_edge_detect(c); pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio, ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""), @@ -244,8 +260,7 @@ static void pxa_unmask_muxed_gpio(unsigned int irq) struct pxa_gpio_chip *c = gpio_to_chip(gpio); c->irq_mask |= GPIO_bit(gpio); - __raw_writel(c->irq_edge_rise & c->irq_mask, c->regbase + GRER_OFFSET); - __raw_writel(c->irq_edge_fall & c->irq_mask, c->regbase + GFER_OFFSET); + update_edge_detect(c); } static struct irq_chip pxa_muxed_gpio_chip = { |