[PATCH 2/2 v2] OMAP2+: hwmod: Add API to check IO PAD wakeup status

[Govindraj.R]

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

Signed-off-by: Govindraj.R <govindraj.raja at ti.com>
---
 arch/arm/mach-omap2/mux.c                    |   28 ++++++++++++++++++++++++++
 arch/arm/mach-omap2/mux.h                    |   13 ++++++++++++
 arch/arm/mach-omap2/omap_hwmod.c             |   14 +++++++++++++
 arch/arm/plat-omap/include/plat/omap_hwmod.h |    1 +
 4 files changed, 56 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index a4ab1e3..b40aebe 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -348,6 +348,34 @@ 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.
+ */
+bool 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];
+
+		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 137f321..86a0051 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.
+ */
+bool omap_hwmod_mux_get_wake_status(struct omap_hwmod_mux_info *hmux);
 #else
 
+static inline bool
+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 bbbe1ed..3311234 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -2420,3 +2420,17 @@ int omap_hwmod_disable_ioring_wakeup(struct omap_hwmod *oh)
 	val &= ~OMAP_WAKEUP_EN;
 	return omap_hwmod_configure_ioring_wakeup(oh, val);
 }
+
+/**
+ * omap_hwmod_pad_get_wakeup_status - get pad wakeup status if mux is available.
+ * @oh: struct omap_hwmod *
+ *
+ * Returns the wake_up status bit of available pad mux pin.
+ * return error if no mux pads are available.
+ */
+int omap_hmwod_pad_get_wakeup_status(struct omap_hwmod *oh)
+{
+	if (oh->mux)
+		return omap_hwmod_mux_get_wake_status(oh->mux);
+	return -EINVAL;
+}
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 7ef11a6..664975c 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -605,6 +605,7 @@ int omap_hwmod_no_setup_reset(struct omap_hwmod *oh);
 int omap_hwmod_enable_ioring_wakeup(struct omap_hwmod *oh);
 int omap_hwmod_disable_ioring_wakeup(struct omap_hwmod *oh);
 
+int omap_hmwod_pad_get_wakeup_status(struct omap_hwmod *oh);
 /*
  * Chip variant-specific hwmod init routines - XXX should be converted
  * to use initcalls once the initial boot ordering is straightened out
-- 
1.7.1