OMAP2+: hwmod: Add API to check IO PAD wakeup status

Add API to determine IO-PAD wakeup event status for a given
hwmod dynamic_mux pad.

Signed-off-by: Govindraj.R <govindraj.raja@ti.com>

3 files changed, 50 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index c7fb22a..880d1d7 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -351,6 +351,36 @@ err1:
 	return NULL;
 }
 
+/**
+ * omap_hwmod_mux_get_wake_status - omap hwmod check pad wakeup
+ * @hmux:		Pads for a hwmod
+ *
+ * Gets the wakeup status of given pad from omap-hwmod.
+ * Returns true if wakeup event is set for pad else false
+ * if wakeup is not occured or pads are not avialable.
+ */
+int omap_hwmod_mux_get_wake_status(struct omap_hwmod_mux_info *hmux)
+{
+	int i;
+	unsigned int val;
+	u8 ret = false;
+
+	for (i = 0; i < hmux->nr_pads; i++) {
+		struct omap_device_pad *pad = &hmux->pads[i];
+
+		if (pad->flags & OMAP_DEVICE_PAD_WAKEUP) {
+			val = omap_mux_read(pad->partition,
+					pad->mux->reg_offset);
+			if (val & OMAP_WAKEUP_EVENT) {
+				ret = true;
+				break;
+			}
+		}
+	}
+
+	return ret;
+}
+
 /* Assumes the calling function takes care of locking */
 void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
 {
diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h
index 2132308..47c47d1 100644
--- a/arch/arm/mach-omap2/mux.h
+++ b/arch/arm/mach-omap2/mux.h
@@ -225,8 +225,21 @@ omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
  */
 void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state);
 
+/**
+ * omap_hwmod_mux_get_wake_status - omap hwmod check pad wakeup
+ * @hmux:		Pads for a hwmod
+ *
+ * Called only from omap_hwmod.c, do not use.
+ */
+int omap_hwmod_mux_get_wake_status(struct omap_hwmod_mux_info *hmux);
 #else
 
+static inline int
+omap_hwmod_mux_get_wake_status(struct omap_hwmod_mux_info *hmux)
+{
+	return 0;
+}
+
 static inline int omap_mux_init_gpio(int gpio, int val)
 {
 	return 0;
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index e45ac46..303fda6 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -2462,3 +2462,10 @@ int omap_hwmod_no_setup_reset(struct omap_hwmod *oh)
 
 	return 0;
 }
+
+int omap_hwmod_pad_get_wakeup_status(struct omap_hwmod *oh)
+{
+	if (oh && oh->mux)
+		return omap_hwmod_mux_get_wake_status(oh->mux);
+	return -EINVAL;
+}