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-rw-r--r--arch/arm/plat-omap/gpio.c93
1 files changed, 83 insertions, 10 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 14a3f7118c7..df0ff0fd881 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) {