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| author | Igor Grinberg <grinberg@compulab.co.il> | 2012-04-12 16:43:28 +0400 |
|---|---|---|
| committer | Haojian Zhuang <haojian.zhuang@gmail.com> | 2012-04-27 07:11:50 +0400 |
| commit | a13b878780ea98d8415203c4502a8fc5bc614656 (patch) | |
| tree | 2ffed2d5b92cca357fec94a15d3427783693a9ab /arch/arm/mach-pxa/include | |
| parent | 9f9d27e3f3317f39c91c286b6184f1ca05452968 (diff) | |
| download | linux-a13b878780ea98d8415203c4502a8fc5bc614656.tar.xz | |
ARM: PXA2xx: MFP: fix bug with MFP_LPM_KEEP_OUTPUT
Pins that have MFP_LPM_KEEP_OUTPUT set and are configured for output
must retain the output state in low power mode.
Currently, the pin direction configuration is overrided with values
in gpdr_lpm[] array and do not obey the MFP_LPM_KEEP_OUTPUT setting.
Fix the above bug and add some documentation to clarify the
MFP_LPM_KEEP_OUTPUT setting purpose.
Reported-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Tested-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Diffstat (limited to 'arch/arm/mach-pxa/include')
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/mfp-pxa2xx.h | 7 |
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) |