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| author | Daniel Mack <daniel@caiaq.de> | 2009-08-11 14:39:09 +0200 |
|---|---|---|
| committer | Eric Miao <eric.y.miao@gmail.com> | 2009-09-10 18:49:24 +0800 |
| commit | fb60870f630f926d2299b6ebd31fc94714dcd734 (patch) | |
| tree | 64aec7edf3f57d0a4a5497bca8616801f576bf13 /arch/arm/plat-pxa/mfp.c | |
| parent | 9304d008d6ba41ff52ef6eae44337398e83b4436 (diff) | |
| download | talos-obmc-linux-fb60870f630f926d2299b6ebd31fc94714dcd734.tar.gz talos-obmc-linux-fb60870f630f926d2299b6ebd31fc94714dcd734.zip | |
[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>
Diffstat (limited to 'arch/arm/plat-pxa/mfp.c')
| -rw-r--r-- | arch/arm/plat-pxa/mfp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/plat-pxa/mfp.c b/arch/arm/plat-pxa/mfp.c index e716c622a17c..9405d0379c85 100644 --- a/arch/arm/plat-pxa/mfp.c +++ b/arch/arm/plat-pxa/mfp.c @@ -77,11 +77,13 @@ * MFPR_PULL_LOW 1 0 1 * MFPR_PULL_HIGH 1 1 0 * MFPR_PULL_BOTH 1 1 1 + * MFPR_PULL_FLOAT 1 0 0 */ #define MFPR_PULL_NONE (0) #define MFPR_PULL_LOW (MFPR_PULL_SEL | MFPR_PULLDOWN_EN) #define MFPR_PULL_BOTH (MFPR_PULL_LOW | MFPR_PULLUP_EN) #define MFPR_PULL_HIGH (MFPR_PULL_SEL | MFPR_PULLUP_EN) +#define MFPR_PULL_FLOAT (MFPR_PULL_SEL) /* mfp_spin_lock is used to ensure that MFP register configuration * (most likely a read-modify-write operation) is atomic, and that @@ -116,6 +118,7 @@ static const unsigned long mfpr_pull[] = { MFPR_PULL_LOW, MFPR_PULL_HIGH, MFPR_PULL_BOTH, + MFPR_PULL_FLOAT, }; /* mapping of MFP_LPM_EDGE_* definitions to MFPR_EDGE_* register bits */ |
