omap mailbox: add save_/restore_ctx() for PM

To preserve the registers during off-mode

Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/mach/mailbox.h b/arch/arm/plat-omap/include/mach/mailbox.h
index 577db6852f43..b7a6991814ec 100644
--- a/arch/arm/plat-omap/include/mach/mailbox.h
+++ b/arch/arm/plat-omap/include/mach/mailbox.h
@@ -33,6 +33,9 @@ struct omap_mbox_ops {
         void            (*disable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
         void            (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
         int             (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
+        /* ctx */
+        void            (*save_ctx)(struct omap_mbox *mbox);
+        void            (*restore_ctx)(struct omap_mbox *mbox);
 };
 
 struct omap_mbox_queue {
@@ -70,4 +73,24 @@ void omap_mbox_put(struct omap_mbox *);
 int omap_mbox_register(struct device *parent, struct omap_mbox *);
 int omap_mbox_unregister(struct omap_mbox *);
 
+static inline void omap_mbox_save_ctx(struct omap_mbox *mbox)
+{
+        if (!mbox->ops->save_ctx) {
+                dev_err(mbox->dev, "%s:\tno save\n", __func__);
+                return;
+        }
+
+        mbox->ops->save_ctx(mbox);
+}
+
+static inline void omap_mbox_restore_ctx(struct omap_mbox *mbox)
+{
+        if (!mbox->ops->restore_ctx) {
+                dev_err(mbox->dev, "%s:\tno restore\n", __func__);
+                return;
+        }
+
+        mbox->ops->restore_ctx(mbox);
+}
+
 #endif /* MAILBOX_H */