1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/include/mach/mfp-pxa2xx.h b/arch/arm/mach-pxa/include/mach/mfp-pxa2xx.h
index c54cef25895c..cbf51ae81855 100644
--- a/arch/arm/mach-pxa/include/mach/mfp-pxa2xx.h
+++ b/arch/arm/mach-pxa/include/mach/mfp-pxa2xx.h
@@ -17,6 +17,7 @@
  *
  * bit     23 - Input/Output (PXA2xx specific)
  * bit     24 - Wakeup Enable(PXA2xx specific)
+ * bit     25 - Keep Output  (PXA2xx specific)
  */
 
 #define MFP_DIR_IN              (0x0 << 23)
@@ -25,6 +26,12 @@
 #define MFP_DIR(x)              (((x) >> 23) & 0x1)
 
 #define MFP_LPM_CAN_WAKEUP      (0x1 << 24)
+
+/*
+ * MFP_LPM_KEEP_OUTPUT must be specified for pins that need to
+ * retain their last output level (low or high).
+ * Note: MFP_LPM_KEEP_OUTPUT has no effect on pins configured for input.
+ */
 #define MFP_LPM_KEEP_OUTPUT     (0x1 << 25)
 
 #define WAKEUP_ON_EDGE_RISE     (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_RISE)