[ARM] pxa: allow keypad GPIOs to wakeup when configured as generic

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

1 files changed, 22 insertions, 9 deletions

diff --git a/arch/arm/mach-pxa/mfp-pxa2xx.c b/arch/arm/mach-pxa/mfp-pxa2xx.c
index c98b5a8c3b0f..e5b79210a90b 100644
--- a/arch/arm/mach-pxa/mfp-pxa2xx.c
+++ b/arch/arm/mach-pxa/mfp-pxa2xx.c
@@ -178,8 +178,17 @@ int gpio_set_wake(unsigned int gpio, unsigned int on)
         if (!d->valid)
                 return -EINVAL;
 
-        if (d->keypad_gpio)
-                return -EINVAL;
+        /* Allow keypad GPIOs to wakeup system when
+         * configured as generic GPIOs.
+         */
+        if (d->keypad_gpio && (MFP_AF(d->config) == 0) &&
+            (d->config & MFP_LPM_CAN_WAKEUP)) {
+                if (on)
+                        PKWR |= d->mask;
+                else
+                        PKWR &= ~d->mask;
+                return 0;
+        }
 
         mux_taken = (PWER & d->mux_mask) & (~d->mask);
         if (on && mux_taken)
@@ -239,21 +248,25 @@ static int pxa27x_pkwr_gpio[] = {
 int keypad_set_wake(unsigned int on)
 {
         unsigned int i, gpio, mask = 0;
-
-        if (!on) {
-                PKWR = 0;
-                return 0;
-        }
+        struct gpio_desc *d;
 
         for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
 
                 gpio = pxa27x_pkwr_gpio[i];
+                d = &gpio_desc[gpio];
 
-                if (gpio_desc[gpio].config & MFP_LPM_CAN_WAKEUP)
+                /* skip if configured as generic GPIO */
+                if (MFP_AF(d->config) == 0)
+                        continue;
+
+                if (d->config & MFP_LPM_CAN_WAKEUP)
                         mask |= gpio_desc[gpio].mask;
         }
 
-        PKWR = mask;
+        if (on)
+                PKWR |= mask;
+        else
+                PKWR &= ~mask;
         return 0;
 }