OMAP4 powerdomain: Support LOWPOWERSTATECHANGE for powerdomains

Some powerdomains in OMAP4 support a direct transition from one sleep
state to another deeper sleep state without having to wakeup the
powerdomain. This patch adds an api in the powerdomain framework to
set the LOWPOWERSTATECHANGE bit in PWRSTCTRL register.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/powerdomain.h b/arch/arm/plat-omap/include/plat/powerdomain.h
index e7cc7e66e97..fb6ec74fe39 100644
--- a/arch/arm/plat-omap/include/plat/powerdomain.h
+++ b/arch/arm/plat-omap/include/plat/powerdomain.h
@@ -50,6 +50,12 @@
                                           * in MEM bank 1 position. This is
                                           * true for OMAP3430
                                           */
+#define PWRDM_HAS_LOWPOWERSTATECHANGE   (1 << 2) /*
+                                                  * support to transition from a
+                                                  * sleep state to a lower sleep
+                                                  * state without waking up the
+                                                  * powerdomain
+                                                  */
 
 /*
  * Number of memory banks that are power-controllable.  On OMAP4430, the