[ARM] pxa: add MFP_PULL_FLOAT

There is currently an uncovered case for MFP configuration on PXAs which
is selected by setting the PULL_SEL bit but none of the PULL{UP,DOWN}_EN
bits. This case is needed to explicitly let pins float, even if the
selected alternate function would default to a configuration with a pull
resistor enabled.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/arm/plat-pxa/include/plat/mfp.h b/arch/arm/plat-pxa/include/plat/mfp.h
index 64019464c8db..08ad665460ba 100644
--- a/arch/arm/plat-pxa/include/plat/mfp.h
+++ b/arch/arm/plat-pxa/include/plat/mfp.h
@@ -325,8 +325,9 @@ typedef unsigned long mfp_cfg_t;
 #define MFP_PULL_LOW            (0x1 << 21)
 #define MFP_PULL_HIGH           (0x2 << 21)
 #define MFP_PULL_BOTH           (0x3 << 21)
-#define MFP_PULL_MASK           (0x3 << 21)
-#define MFP_PULL(x)             (((x) >> 21) & 0x3)
+#define MFP_PULL_FLOAT          (0x4 << 21)
+#define MFP_PULL_MASK           (0x7 << 21)
+#define MFP_PULL(x)             (((x) >> 21) & 0x7)
 
 #define MFP_CFG_DEFAULT         (MFP_AF0 | MFP_DS03X | MFP_LPM_DEFAULT |\
                                  MFP_LPM_EDGE_NONE | MFP_PULL_NONE)