[ARM] 4560/1: pxa: move processor specific set_wake logic out of irq.c

a function pxa_init_irq_set_wake() was introduced, so that
processor specific code could install their own version

code setting PFER and PRER registers within pxa_gpio_irq_type
are removed, and the edge configuration is postponed to the
(*set_wake) and copies the GRER and GFER register, which will
always be set up correctly by pxa_gpio_irq_type()

Signed-off-by: eric miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 42 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index ef40c049d9e..0d6a72504ca 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -227,10 +227,52 @@ static void __init pxa25x_init_pm(void)
 }
 #endif
 
+/* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
+ */
+
+static int pxa25x_set_wake(unsigned int irq, unsigned int on)
+{
+        int gpio = IRQ_TO_GPIO(irq);
+        uint32_t gpio_bit, 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 (irq == IRQ_RTCAlrm) {
+                mask = PWER_RTC;
+                goto set_pwer;
+        }
+
+        return -EINVAL;
+
+set_pwer:
+        if (on)
+                PWER |= mask;
+        else
+                PWER &=~mask;
+
+        return 0;
+}
+
 void __init pxa25x_init_irq(void)
 {
         pxa_init_irq_low();
         pxa_init_irq_gpio(85);
+        pxa_init_irq_set_wake(pxa25x_set_wake);
 }
 
 static struct platform_device *pxa25x_devices[] __initdata = {