diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2010-10-01 10:40:37 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2010-10-21 07:54:56 +0900 |
| commit | 170a46177094b390299d1206748d7f15cd375dc9 (patch) | |
| tree | 81fc5270bbc74d1cf946b2ed265fb85c4dee3ed8 /arch/arm/plat-samsung | |
| parent | ca1931ca1e87c32f9abaef378c6996b25774cb02 (diff) | |
ARM: S5P: Add common S5P GPIO Interrupt support
This patch adds common code to enable support of GPIO interrupt on
S5P SoCs.
The total number of GPIO pins is quite large on S5P SoCs. Registering
irq support for all of them would be a resource waste. Because of that
the interrupt support for standard GPIO pins is registered dynamically
by the s5p_register_gpio_interrupt() function.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: minor title fixes]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-samsung')
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-cfg.h | 18 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-core.h | 4 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/include/plat/gpio-cfg.h b/arch/arm/plat-samsung/include/plat/gpio-cfg.h index 1c6b92947c5..5b43b95da68 100644 --- a/arch/arm/plat-samsung/include/plat/gpio-cfg.h +++ b/arch/arm/plat-samsung/include/plat/gpio-cfg.h @@ -169,4 +169,22 @@ extern s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin); */ extern int s5p_gpio_set_drvstr(unsigned int pin, s5p_gpio_drvstr_t drvstr); +/** + * s5p_register_gpio_interrupt() - register interrupt support for a gpio group + * @pin: The pin number from the group to be registered + * + * This function registers gpio interrupt support for the group that the + * specified pin belongs to. + * + * The total number of gpio pins is quite large ob s5p series. Registering + * irq support for all of them would be a resource waste. Because of that the + * interrupt support for standard gpio pins is registered dynamically. + * + * It will return the irq number of the interrupt that has been registered + * or -ENOMEM if no more gpio interrupts can be registered. It is allowed + * to call this function more than once for the same gpio group (the group + * will be registered only once). + */ +extern int s5p_register_gpio_interrupt(int pin); + #endif /* __PLAT_GPIO_CFG_H */ diff --git a/arch/arm/plat-samsung/include/plat/gpio-core.h b/arch/arm/plat-samsung/include/plat/gpio-core.h index e358c7da848..c22c27ca675 100644 --- a/arch/arm/plat-samsung/include/plat/gpio-core.h +++ b/arch/arm/plat-samsung/include/plat/gpio-core.h @@ -43,6 +43,8 @@ struct s3c_gpio_cfg; * struct s3c_gpio_chip - wrapper for specific implementation of gpio * @chip: The chip structure to be exported via gpiolib. * @base: The base pointer to the gpio configuration registers. + * @group: The group register number for gpio interrupt support. + * @irq_base: The base irq number. * @config: special function and pull-resistor control information. * @lock: Lock for exclusive access to this gpio bank. * @pm_save: Save information for suspend/resume support. @@ -63,6 +65,8 @@ struct s3c_gpio_chip { struct s3c_gpio_cfg *config; struct s3c_gpio_pm *pm; void __iomem *base; + int irq_base; + int group; spinlock_t lock; #ifdef CONFIG_PM u32 pm_save[4]; |