[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>
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 653a3b6..c486c30 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -26,6 +26,7 @@
#include <asm/hardware.h>
#include <asm/arch/irqs.h>
#include <asm/arch/pxa-regs.h>
+#include <asm/arch/mfp-pxa25x.h>
#include <asm/arch/pm.h>
#include <asm/arch/dma.h>
@@ -230,24 +231,10 @@
static int pxa25x_set_wake(unsigned int irq, unsigned int on)
{
int gpio = IRQ_TO_GPIO(irq);
- uint32_t gpio_bit, mask = 0;
+ uint32_t mask = 0;
- if (gpio >= 0 && gpio <= 15) {
- gpio_bit = GPIO_bit(gpio);
- mask = gpio_bit;
- if (on) {
- if (GRER(gpio) | gpio_bit)
- PRER |= gpio_bit;
- else
- PRER &= ~gpio_bit;
-
- if (GFER(gpio) | gpio_bit)
- PFER |= gpio_bit;
- else
- PFER &= ~gpio_bit;
- }
- goto set_pwer;
- }
+ if (gpio >= 0 && gpio < 85)
+ return gpio_set_wake(gpio, on);
if (irq == IRQ_RTCAlrm) {
mask = PWER_RTC;