[ARM] pxa: better MFP low power state support for pxa25x/pxa27x

When configured as a specific low power state: MFP_LPM_DRIVE_LOW,
MFP_LPM_DRIVE_HIGH, the corresponding GPDR register bit during
low power mode shall be re-configured as output (if they are not
configured so), thus the PGSRx bits can output.

Create an additional low power values GPDR registers, and properly
save/restore the GAFR + GPDR registers when doing suspend/resume.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/arm/mach-pxa/include/mach/mfp.h b/arch/arm/mach-pxa/include/mach/mfp.h
index 8769567b389b..482185053a92 100644
--- a/arch/arm/mach-pxa/include/mach/mfp.h
+++ b/arch/arm/mach-pxa/include/mach/mfp.h
@@ -274,12 +274,13 @@ typedef unsigned long mfp_cfg_t;
 #define MFP_DS_MASK             (0x7 << 13)
 #define MFP_DS(x)               (((x) >> 13) & 0x7)
 
-#define MFP_LPM_INPUT           (0x0 << 16)
+#define MFP_LPM_DEFAULT         (0x0 << 16)
 #define MFP_LPM_DRIVE_LOW       (0x1 << 16)
 #define MFP_LPM_DRIVE_HIGH      (0x2 << 16)
 #define MFP_LPM_PULL_LOW        (0x3 << 16)
 #define MFP_LPM_PULL_HIGH       (0x4 << 16)
 #define MFP_LPM_FLOAT           (0x5 << 16)
+#define MFP_LPM_INPUT           (0x6 << 16)
 #define MFP_LPM_STATE_MASK      (0x7 << 16)
 #define MFP_LPM_STATE(x)        (((x) >> 16) & 0x7)
 
@@ -297,7 +298,7 @@ typedef unsigned long mfp_cfg_t;
 #define MFP_PULL_MASK           (0x3 << 21)
 #define MFP_PULL(x)             (((x) >> 21) & 0x3)
 
-#define MFP_CFG_DEFAULT         (MFP_AF0 | MFP_DS03X | MFP_LPM_INPUT |\
+#define MFP_CFG_DEFAULT         (MFP_AF0 | MFP_DS03X | MFP_LPM_DEFAULT |\
                                  MFP_LPM_EDGE_NONE | MFP_PULL_NONE)
 
 #define MFP_CFG(pin, af)                \