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ARM: EXYNOS4: Add support for gpio interrupts

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This patch adds support for gpio interrupts on Samsung EXYNOS4 platform.
Common s5p-gpioint.c code is used for handling gpio interrupts. Each gpio
line that needs gpio interrupt support must be later registered with
s5p_register_gpio_interrupt() function.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Marek Szyprowski 2011-03-15 21:17:43 +09:00 committed by Kukjin Kim
parent a43efddc3b
commit 721bbd4a06
2 changed files with 25 additions and 5 deletions
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18
arch/arm/mach-exynos4/gpiolib.c
View file

@ -304,6 +304,7 @@ static __init int exynos4_gpiolib_init(void)
{
struct s3c_gpio_chip *chip;
int i;
int group = 0;
int nr_chips;
/* GPIO part 1 */
@ -312,8 +313,11 @@ static __init int exynos4_gpiolib_init(void)
nr_chips = ARRAY_SIZE(exynos4_gpio_part1_4bit);
for (i = 0; i < nr_chips; i++, chip++) {
if (chip->config == NULL)
if (chip->config == NULL) {
chip->config = &gpio_cfg;
/* Assign the GPIO interrupt group */
chip->group = group++;
}
if (chip->base == NULL)
chip->base = S5P_VA_GPIO1 + (i) * 0x20;
}
@ -326,8 +330,11 @@ static __init int exynos4_gpiolib_init(void)
nr_chips = ARRAY_SIZE(exynos4_gpio_part2_4bit);
for (i = 0; i < nr_chips; i++, chip++) {
if (chip->config == NULL)
if (chip->config == NULL) {
chip->config = &gpio_cfg;
/* Assign the GPIO interrupt group */
chip->group = group++;
}
if (chip->base == NULL)
chip->base = S5P_VA_GPIO2 + (i) * 0x20;
}
@ -340,13 +347,18 @@ static __init int exynos4_gpiolib_init(void)
nr_chips = ARRAY_SIZE(exynos4_gpio_part3_4bit);
for (i = 0; i < nr_chips; i++, chip++) {
if (chip->config == NULL)
if (chip->config == NULL) {
chip->config = &gpio_cfg;
/* Assign the GPIO interrupt group */
chip->group = group++;
}
if (chip->base == NULL)
chip->base = S5P_VA_GPIO3 + (i) * 0x20;
}
samsung_gpiolib_add_4bit_chips(exynos4_gpio_part3_4bit, nr_chips);
s5p_register_gpioint_bank(IRQ_GPIO_XA, 0, IRQ_GPIO1_NR_GROUPS);
s5p_register_gpioint_bank(IRQ_GPIO_XB, IRQ_GPIO1_NR_GROUPS, IRQ_GPIO2_NR_GROUPS);
return 0;
}

12
arch/arm/mach-exynos4/include/mach/irqs.h
View file

@ -85,6 +85,9 @@
#define IRQ_RTC_ALARM COMBINER_IRQ(23, 0)
#define IRQ_RTC_TIC COMBINER_IRQ(23, 1)
#define IRQ_GPIO_XB COMBINER_IRQ(24, 0)
#define IRQ_GPIO_XA COMBINER_IRQ(24, 1)
#define IRQ_UART0 COMBINER_IRQ(26, 0)
#define IRQ_UART1 COMBINER_IRQ(26, 1)
#define IRQ_UART2 COMBINER_IRQ(26, 2)
@ -145,8 +148,13 @@
#define S5P_EINT_BASE1 (S5P_IRQ_EINT_BASE + 0)
#define S5P_EINT_BASE2 (S5P_IRQ_EINT_BASE + 16)
/* Set the default NR_IRQS */
/* optional GPIO interrupts */
#define S5P_GPIOINT_BASE (S5P_IRQ_EINT_BASE + 32)
#define IRQ_GPIO1_NR_GROUPS 16
#define IRQ_GPIO2_NR_GROUPS 9
#define IRQ_GPIO_END (S5P_GPIOINT_BASE + S5P_GPIOINT_COUNT)
#define NR_IRQS (S5P_IRQ_EINT_BASE + 32)
/* Set the default NR_IRQS */
#define NR_IRQS (IRQ_GPIO_END)
#endif /* __ASM_ARCH_IRQS_H */