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ARM: OMAP: Add 24xx GPIO debounce support

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Add 24xx GPIO debounce support. Also minor formatting
clean-up.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Kevin Hilman 2007-05-05 11:40:29 -07:00 committed by Tony Lindgren
parent d11ac9791b
commit 5eb3bb9c0d
2 changed files with 57 additions and 5 deletions
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60
arch/arm/plat-omap/gpio.c
View File

@ -110,6 +110,8 @@
#define OMAP24XX_GPIO_LEVELDETECT1 0x0044
#define OMAP24XX_GPIO_RISINGDETECT 0x0048
#define OMAP24XX_GPIO_FALLINGDETECT 0x004c
#define OMAP24XX_GPIO_DEBOUNCE_EN 0x0050
#define OMAP24XX_GPIO_DEBOUNCE_VAL 0x0054
#define OMAP24XX_GPIO_CLEARIRQENABLE1 0x0060
#define OMAP24XX_GPIO_SETIRQENABLE1 0x0064
#define OMAP24XX_GPIO_CLEARWKUENA 0x0080
@ -463,8 +465,50 @@ do { \
__raw_writel(l, base + reg); \
} while(0)
void omap_set_gpio_debounce(int gpio, int enable)
{
struct gpio_bank *bank;
void __iomem *reg;
u32 val, l = 1 << get_gpio_index(gpio);
if (cpu_class_is_omap1())
return;
bank = get_gpio_bank(gpio);
reg = bank->base;
reg += OMAP24XX_GPIO_DEBOUNCE_EN;
val = __raw_readl(reg);
if (enable)
val |= l;
else
val &= ~l;
__raw_writel(val, reg);
}
EXPORT_SYMBOL(omap_set_gpio_debounce);
void omap_set_gpio_debounce_time(int gpio, int enc_time)
{
struct gpio_bank *bank;
void __iomem *reg;
if (cpu_class_is_omap1())
return;
bank = get_gpio_bank(gpio);
reg = bank->base;
enc_time &= 0xff;
reg += OMAP24XX_GPIO_DEBOUNCE_VAL;
__raw_writel(enc_time, reg);
}
EXPORT_SYMBOL(omap_set_gpio_debounce_time);
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
int trigger)
{
void __iomem *base = bank->base;
u32 gpio_bit = 1 << gpio;
@ -477,19 +521,25 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, in
trigger & __IRQT_RISEDGE);
MOD_REG_BIT(OMAP24XX_GPIO_FALLINGDETECT, gpio_bit,
trigger & __IRQT_FALEDGE);
if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
if (trigger != 0)
__raw_writel(1 << gpio, bank->base + OMAP24XX_GPIO_SETWKUENA);
__raw_writel(1 << gpio, bank->base
+ OMAP24XX_GPIO_SETWKUENA);
else
__raw_writel(1 << gpio, bank->base + OMAP24XX_GPIO_CLEARWKUENA);
__raw_writel(1 << gpio, bank->base
+ OMAP24XX_GPIO_CLEARWKUENA);
} else {
if (trigger != 0)
bank->enabled_non_wakeup_gpios |= gpio_bit;
else
bank->enabled_non_wakeup_gpios &= ~gpio_bit;
}
/* FIXME: Possibly do 'set_irq_handler(j, handle_level_irq)' if only level
* triggering requested. */
/*
* FIXME: Possibly do 'set_irq_handler(j, handle_level_irq)' if only
* level triggering requested.
*/
}
#endif

2
include/asm-arm/arch-omap/gpio.h
View File

@ -77,6 +77,8 @@ extern void omap_free_gpio(int gpio);
extern void omap_set_gpio_direction(int gpio, int is_input);
extern void omap_set_gpio_dataout(int gpio, int enable);
extern int omap_get_gpio_datain(int gpio);
extern void omap_set_gpio_debounce(int gpio, int enable);
extern void omap_set_gpio_debounce_time(int gpio, int enable);
/*-------------------------------------------------------------------------*/