OMAP4: PM: enable wakeup irq for PRCM and SYS_1N

Wake-up enable bits need to be set by each driver,
but some specific irq's do not have a driver as such,
and still have to be set as wakeup enable. This is the case
of PRCM and SYS_1N. For these irq's, we handle wakeup
enable bits on the suspend path.

Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Axel Haslam <axelhaslam@ti.com>
Signed-off-by: Deepak K<deepak.k@ti.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index 5aad31d..3eea05f 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -155,6 +155,15 @@ void omap4_enter_sleep(unsigned int cpu, unsigned int power_state)
 	return;
 }
 
+/* We set the wake-up enable bits for irq's that have to be wakeup capable but
+ * are not associated with a specific driver.
+ */
+static void omap4_pm_set_wakeups(int enable)
+{
+	irq_set_irq_wake(OMAP44XX_IRQ_PRCM, enable);
+	irq_set_irq_wake(OMAP44XX_IRQ_SYS_1N, enable);
+}
+
 static int omap4_pm_suspend(void)
 {
 	struct power_state *pwrst;
@@ -171,6 +180,9 @@ static int omap4_pm_suspend(void)
 		pwrst->saved_logic_state = pwrdm_read_logic_retst(pwrst->pwrdm);
 	}
 
+	/* Enable wake-up irq's */
+	omap4_pm_set_wakeups(1);
+
 	/* Set targeted power domain states by suspend */
 	list_for_each_entry(pwrst, &pwrst_list, node) {
 		if ((!strcmp(pwrst->pwrdm->name, "cpu0_pwrdm")) ||
@@ -198,6 +210,9 @@ static int omap4_pm_suspend(void)
 	 */
 	omap4_enter_sleep(0, PWRDM_POWER_OFF);
 
+	/* Disable wake-up irq's */
+	omap4_pm_set_wakeups(0);
+
 	/* Restore next powerdomain state */
 	list_for_each_entry(pwrst, &pwrst_list, node) {
 		state = pwrdm_read_prev_pwrst(pwrst->pwrdm);