diff options
| author | eric miao <eric.miao@marvell.com> | 2008-03-11 04:46:28 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-04-19 14:29:05 +0400 |
| commit | c0a596d6a138ea281bed4ff3018c07c45dd245a2 (patch) | |
| tree | ab3c25663433bf8c3f16026d969f9722d4ecff92 /include/asm-arm | |
| parent | 9b02b2df0099c083ea40ba8c7068e3dcbe381302 (diff) | |
| download | linux-c0a596d6a138ea281bed4ff3018c07c45dd245a2.tar.xz | |
[ARM] pxa: allow dynamic enable/disable of GPIO wakeup for pxa{25x,27x}
Changes include:
1. rename MFP_LPM_WAKEUP_ENABLE into MFP_LPM_CAN_WAKEUP to indicate
the board capability of this pin to wakeup the system
2. add gpio_set_wake() and keypad_set_wake() to allow dynamically
enable/disable wakeup from GPIOs and keypad GPIO
* these functions are currently kept in mfp-pxa2xx.c due to their
dependency to the MFP configuration
3. pxa2xx_mfp_config() only gives early warning if MFP_LPM_CAN_WAKEUP
is set on incorrect pins
So that the GPIO's wakeup capability is now decided by the following:
a) processor's capability: (only those GPIOs which have dedicated
bits within PWER/PRER/PFER can wakeup the system), this is
initialized by pxa{25x,27x}_init_mfp()
b) board design decides:
- whether the pin is designed to wakeup the system (some of
the GPIOs are configured as other functions, which is not
intended to be a wakeup source), by OR'ing the pin config
with MFP_LPM_CAN_WAKEUP
- which edge the pin is designed to wakeup the system, this
may depends on external peripherals/connections, which is
totally board specific; this is indicated by MFP_LPM_EDGE_*
c) the corresponding device's (most likely the gpio_keys.c) wakeup
attribute:
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm')
| -rw-r--r-- | include/asm-arm/arch-pxa/mfp-pxa27x.h | 1 | ||||
| -rw-r--r-- | include/asm-arm/arch-pxa/mfp-pxa2xx.h | 11 |
2 files changed, 7 insertions, 5 deletions
diff --git a/include/asm-arm/arch-pxa/mfp-pxa27x.h b/include/asm-arm/arch-pxa/mfp-pxa27x.h index 65dfaa9109f3..eb6eaa174f8d 100644 --- a/include/asm-arm/arch-pxa/mfp-pxa27x.h +++ b/include/asm-arm/arch-pxa/mfp-pxa27x.h @@ -428,4 +428,5 @@ #define GPIO112_nMSINS MFP_CFG_IN(GPIO112, AF2) #define GPIO32_MSSCLK MFP_CFG_OUT(GPIO32, AF1, DRIVE_LOW) +extern int keypad_set_wake(unsigned int on); #endif /* __ASM_ARCH_MFP_PXA27X_H */ diff --git a/include/asm-arm/arch-pxa/mfp-pxa2xx.h b/include/asm-arm/arch-pxa/mfp-pxa2xx.h index bec6acfcc8cf..db8d890d237c 100644 --- a/include/asm-arm/arch-pxa/mfp-pxa2xx.h +++ b/include/asm-arm/arch-pxa/mfp-pxa2xx.h @@ -24,13 +24,13 @@ #define MFP_DIR_MASK (0x1 << 23) #define MFP_DIR(x) (((x) >> 23) & 0x1) -#define MFP_LPM_WAKEUP_ENABLE (0x1 << 24) -#define WAKEUP_ON_EDGE_RISE (MFP_LPM_WAKEUP_ENABLE | MFP_LPM_EDGE_RISE) -#define WAKEUP_ON_EDGE_FALL (MFP_LPM_WAKEUP_ENABLE | MFP_LPM_EDGE_FALL) -#define WAKEUP_ON_EDGE_BOTH (MFP_LPM_WAKEUP_ENABLE | MFP_LPM_EDGE_BOTH) +#define MFP_LPM_CAN_WAKEUP (0x1 << 24) +#define WAKEUP_ON_EDGE_RISE (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_RISE) +#define WAKEUP_ON_EDGE_FALL (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_FALL) +#define WAKEUP_ON_EDGE_BOTH (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_BOTH) /* specifically for enabling wakeup on keypad GPIOs */ -#define WAKEUP_ON_LEVEL_HIGH (MFP_LPM_WAKEUP_ENABLE) +#define WAKEUP_ON_LEVEL_HIGH (MFP_LPM_CAN_WAKEUP) #define MFP_CFG_IN(pin, af) \ ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DIR_MASK)) |\ @@ -128,4 +128,5 @@ #define GPIO84_GPIO MFP_CFG_IN(GPIO84, AF0) extern void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num); +extern int gpio_set_wake(unsigned int gpio, unsigned int on); #endif /* __ASM_ARCH_MFP_PXA2XX_H */ |