X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Farm%2Fplat-mxc%2Fgpio.c;h=9c3e36232b5b12b58bfe2bd0ee7140a76c960de5;hp=57ec4a896a5d983556ebae058dbf52293ebe669e;hb=91839fd577abc5fb39fb2238e05e847c70c9dec3;hpb=00527cc6bbcac05ab7d54c40bda1ff2a0625ab10

diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
index 57ec4a896a5d..9c3e36232b5b 100644
--- a/arch/arm/plat-mxc/gpio.c
+++ b/arch/arm/plat-mxc/gpio.c
@@ -20,6 +20,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/gpio.h>
@@ -201,11 +202,42 @@ static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc)
 	}
 }
 
+/*
+ * Set interrupt number "irq" in the GPIO as a wake-up source.
+ * While system is running, all registered GPIO interrupts need to have
+ * wake-up enabled. When system is suspended, only selected GPIO interrupts
+ * need to have wake-up enabled.
+ * @param  irq          interrupt source number
+ * @param  enable       enable as wake-up if equal to non-zero
+ * @return       This function returns 0 on success.
+ */
+static int gpio_set_wake_irq(u32 irq, u32 enable)
+{
+	u32 gpio = irq_to_gpio(irq);
+	u32 gpio_idx = gpio & 0x1F;
+	struct mxc_gpio_port *port = &mxc_gpio_ports[gpio / 32];
+
+	if (enable) {
+		if (port->irq_high && (gpio_idx >= 16))
+			enable_irq_wake(port->irq_high);
+		else
+			enable_irq_wake(port->irq);
+	} else {
+		if (port->irq_high && (gpio_idx >= 16))
+			disable_irq_wake(port->irq_high);
+		else
+			disable_irq_wake(port->irq);
+	}
+
+	return 0;
+}
+
 static struct irq_chip gpio_irq_chip = {
 	.ack = gpio_ack_irq,
 	.mask = gpio_mask_irq,
 	.unmask = gpio_unmask_irq,
 	.set_type = gpio_set_irq_type,
+	.set_wake = gpio_set_wake_irq,
 };
 
 static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
@@ -235,7 +267,7 @@ static void mxc_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
-	l = (__raw_readl(reg) & (~(1 << offset))) | (value << offset);
+	l = (__raw_readl(reg) & (~(1 << offset))) | (!!value << offset);
 	__raw_writel(l, reg);
 	spin_unlock_irqrestore(&port->lock, flags);
 }