@@ -199,6 +199,7 @@ struct gpio_bank {
struct gpio_chip chip;
struct clk *dbck;
u32 dbck_enable_mask;
+ u32 mod_usage;
};
#define METHOD_MPUIO 0
@@ -690,6 +691,10 @@ void omap_set_gpio_debounce(int gpio, int enable)
#else
reg += OMAP24XX_GPIO_DEBOUNCE_EN;
#endif
+ if (!(bank->mod_usage & l)) {
+ printk(KERN_ERR "GPIO %d not requested\n", gpio);
+ return;
+ }
spin_lock_irqsave(&bank->lock, flags);
val = __raw_readl(reg);
@@ -726,6 +731,11 @@ void omap_set_gpio_debounce_time(int gpio, int enc_time)
bank = get_gpio_bank(gpio);
reg = bank->base;
+ if (!bank->mod_usage) {
+ printk(KERN_ERR "GPIO not requested\n");
+ return;
+ }
+
enc_time &= 0xff;
#ifdef CONFIG_ARCH_OMAP4
reg += OMAP4_GPIO_DEBOUNCINGTIME;
@@ -1219,6 +1229,16 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
__raw_writel(__raw_readl(reg) | (1 << offset), reg);
}
#endif
+ if (!cpu_class_is_omap1()) {
+ if (!bank->mod_usage) {
+ u32 ctrl;
+ ctrl = __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
+ ctrl &= 0xFFFFFFFE;
+ /* Module is enabled, clocks are not gated */
+ __raw_writel(ctrl, bank->base + OMAP24XX_GPIO_CTRL);
+ }
+ bank->mod_usage |= 1 << offset;
+ }
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@@ -1245,6 +1265,16 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
__raw_writel(1 << offset, reg);
}
#endif
+ if (!cpu_class_is_omap1()) {
+ bank->mod_usage &= ~(1 << offset);
+ if (!bank->mod_usage) {
+ u32 ctrl;
+ ctrl = __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
+ /* Module is disabled, clocks are gated */
+ ctrl |= 1;
+ __raw_writel(ctrl, bank->base + OMAP24XX_GPIO_CTRL);
+ }
+ }
_reset_gpio(bank, bank->chip.base + offset);
spin_unlock_irqrestore(&bank->lock, flags);
}
@@ -1879,6 +1909,8 @@ static int __init _omap_gpio_init(void)
gpio_count = 32;
}
#endif
+
+ bank->mod_usage = 0;
/* REVISIT eventually switch from OMAP-specific gpio structs
* over to the generic ones
*/