1 files changed, 83 insertions, 10 deletions

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 14a3f7118c73..df0ff0fd881a 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -773,29 +773,35 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
 {
         switch (bank->method) {
 #ifdef CONFIG_ARCH_OMAP16XX
+        case METHOD_MPUIO:
         case METHOD_GPIO_1610:
                 spin_lock(&bank->lock);
-                if (enable)
+                if (enable) {
                         bank->suspend_wakeup |= (1 << gpio);
-                else
+                        enable_irq_wake(bank->irq);
+                } else {
+                        disable_irq_wake(bank->irq);
                         bank->suspend_wakeup &= ~(1 << gpio);
+                }
                 spin_unlock(&bank->lock);
                 return 0;
 #endif
 #ifdef CONFIG_ARCH_OMAP24XX
         case METHOD_GPIO_24XX:
+                if (bank->non_wakeup_gpios & (1 << gpio)) {
+                        printk(KERN_ERR "Unable to modify wakeup on "
+                                        "non-wakeup GPIO%d\n",
+                                        (bank - gpio_bank) * 32 + gpio);
+                        return -EINVAL;
+                }
                 spin_lock(&bank->lock);
                 if (enable) {
-                        if (bank->non_wakeup_gpios & (1 << gpio)) {
-                                printk(KERN_ERR "Unable to enable wakeup on "
-                                                "non-wakeup GPIO%d\n",
-                                                (bank - gpio_bank) * 32 + gpio);
-                                spin_unlock(&bank->lock);
-                                return -EINVAL;
-                        }
                         bank->suspend_wakeup |= (1 << gpio);
-                } else
+                        enable_irq_wake(bank->irq);
+                } else {
+                        disable_irq_wake(bank->irq);
                         bank->suspend_wakeup &= ~(1 << gpio);
+                }
                 spin_unlock(&bank->lock);
                 return 0;
 #endif
@@ -1111,16 +1117,81 @@ static struct irq_chip mpuio_irq_chip = {
         .mask           = mpuio_mask_irq,
         .unmask         = mpuio_unmask_irq,
         .set_type       = gpio_irq_type,
+#ifdef CONFIG_ARCH_OMAP16XX
+        /* REVISIT: assuming only 16xx supports MPUIO wake events */
+        .set_wake       = gpio_wake_enable,
+#endif
 };
 
 
 #define bank_is_mpuio(bank)     ((bank)->method == METHOD_MPUIO)
 
+
+#ifdef CONFIG_ARCH_OMAP16XX
+
+#include <linux/platform_device.h>
+
+static int omap_mpuio_suspend_late(struct platform_device *pdev, pm_message_t mesg)
+{
+        struct gpio_bank        *bank = platform_get_drvdata(pdev);
+        void __iomem            *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
+
+        spin_lock(&bank->lock);
+        bank->saved_wakeup = __raw_readl(mask_reg);
+        __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
+        spin_unlock(&bank->lock);
+
+        return 0;
+}
+
+static int omap_mpuio_resume_early(struct platform_device *pdev)
+{
+        struct gpio_bank        *bank = platform_get_drvdata(pdev);
+        void __iomem            *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
+
+        spin_lock(&bank->lock);
+        __raw_writel(bank->saved_wakeup, mask_reg);
+        spin_unlock(&bank->lock);
+
+        return 0;
+}
+
+/* use platform_driver for this, now that there's no longer any
+ * point to sys_device (other than not disturbing old code).
+ */
+static struct platform_driver omap_mpuio_driver = {
+        .suspend_late   = omap_mpuio_suspend_late,
+        .resume_early   = omap_mpuio_resume_early,
+        .driver         = {
+                .name   = "mpuio",
+        },
+};
+
+static struct platform_device omap_mpuio_device = {
+        .name           = "mpuio",
+        .id             = -1,
+        .dev = {
+                .driver = &omap_mpuio_driver.driver,
+        }
+        /* could list the /proc/iomem resources */
+};
+
+static inline void mpuio_init(void)
+{
+        if (platform_driver_register(&omap_mpuio_driver) == 0)
+                (void) platform_device_register(&omap_mpuio_device);
+}
+
+#else
+static inline void mpuio_init(void) {}
+#endif  /* 16xx */
+
 #else
 
 extern struct irq_chip mpuio_irq_chip;
 
 #define bank_is_mpuio(bank)     0
+static inline void mpuio_init(void) {}
 
 #endif
 
@@ -1487,6 +1558,8 @@ static int __init omap_gpio_sysinit(void)
         if (!initialized)
                 ret = _omap_gpio_init();
 
+        mpuio_init();
+
 #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX)
         if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
                 if (ret == 0) {