ARM: pxa: fix gpio wakeup setting

In 3.3, gpio wakeup setting was broken. The call
enable_irq_wake() didn't set up the PXA gpio registers
(PWER, ...) anymore.

Fix it at least for pxa27x. The driver doesn't seem to be
used in pxa25x (weird ...), and the fix doesn't extend to
pxa3xx and pxa95x (which don't have a gpio_set_wake()
available).

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 5689ce62fd8..fc3ace3fd4c 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -64,6 +64,7 @@ struct pxa_gpio_chip {
         unsigned long   irq_mask;
         unsigned long   irq_edge_rise;
         unsigned long   irq_edge_fall;
+        int (*set_wake)(unsigned int gpio, unsigned int on);
 
 #ifdef CONFIG_PM
         unsigned long   saved_gplr;
@@ -269,7 +270,8 @@ static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
                                 (value ? GPSR_OFFSET : GPCR_OFFSET));
 }
 
-static int __devinit pxa_init_gpio_chip(int gpio_end)
+static int __devinit pxa_init_gpio_chip(int gpio_end,
+                                        int (*set_wake)(unsigned int, unsigned int))
 {
         int i, gpio, nbanks = gpio_to_bank(gpio_end) + 1;
         struct pxa_gpio_chip *chips;
@@ -285,6 +287,7 @@ static int __devinit pxa_init_gpio_chip(int gpio_end)
 
                 sprintf(chips[i].label, "gpio-%d", i);
                 chips[i].regbase = gpio_reg_base + BANK_OFF(i);
+                chips[i].set_wake = set_wake;
 
                 c->base  = gpio;
                 c->label = chips[i].label;
@@ -412,6 +415,17 @@ static void pxa_mask_muxed_gpio(struct irq_data *d)
         writel_relaxed(gfer, c->regbase + GFER_OFFSET);
 }
 
+static int pxa_gpio_set_wake(struct irq_data *d, unsigned int on)
+{
+        int gpio = pxa_irq_to_gpio(d->irq);
+        struct pxa_gpio_chip *c = gpio_to_pxachip(gpio);
+
+        if (c->set_wake)
+                return c->set_wake(gpio, on);
+        else
+                return 0;
+}
+
 static void pxa_unmask_muxed_gpio(struct irq_data *d)
 {
         int gpio = pxa_irq_to_gpio(d->irq);
@@ -427,6 +441,7 @@ static struct irq_chip pxa_muxed_gpio_chip = {
         .irq_mask       = pxa_mask_muxed_gpio,
         .irq_unmask     = pxa_unmask_muxed_gpio,
         .irq_set_type   = pxa_gpio_irq_type,
+        .irq_set_wake   = pxa_gpio_set_wake,
 };
 
 static int pxa_gpio_nums(void)
@@ -471,6 +486,7 @@ static int __devinit pxa_gpio_probe(struct platform_device *pdev)
         struct pxa_gpio_chip *c;
         struct resource *res;
         struct clk *clk;
+        struct pxa_gpio_platform_data *info;
         int gpio, irq, ret;
         int irq0 = 0, irq1 = 0, irq_mux, gpio_offset = 0;
 
@@ -516,7 +532,8 @@ static int __devinit pxa_gpio_probe(struct platform_device *pdev)
         }
 
         /* Initialize GPIO chips */
-        pxa_init_gpio_chip(pxa_last_gpio);
+        info = dev_get_platdata(&pdev->dev);
+        pxa_init_gpio_chip(pxa_last_gpio, info ? info->gpio_set_wake : NULL);
 
         /* clear all GPIO edge detects */
         for_each_gpio_chip(gpio, c) {