1 files changed, 33 insertions, 8 deletions

diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index f3c687cf0071..fbadf3021b9e 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -111,24 +111,30 @@ static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type)
 	if (line < 0)
 		return -EINVAL;
 
-	if (type & IRQT_BOTHEDGE) {
+	switch (type){
+	case IRQT_BOTHEDGE:
 		int_style = IXP4XX_GPIO_STYLE_TRANSITIONAL;
 		irq_type = IXP4XX_IRQ_EDGE;
-	} else  if (type & IRQT_RISING) {
+		break;
+	case IRQT_RISING:
 		int_style = IXP4XX_GPIO_STYLE_RISING_EDGE;
 		irq_type = IXP4XX_IRQ_EDGE;
-	} else if (type & IRQT_FALLING) {
+		break;
+	case IRQT_FALLING:
 		int_style = IXP4XX_GPIO_STYLE_FALLING_EDGE;
 		irq_type = IXP4XX_IRQ_EDGE;
-	} else if (type & IRQT_HIGH) {
+		break;
+	case IRQT_HIGH:
 		int_style = IXP4XX_GPIO_STYLE_ACTIVE_HIGH;
 		irq_type = IXP4XX_IRQ_LEVEL;
-	} else if (type & IRQT_LOW) {
+		break;
+	case IRQT_LOW:
 		int_style = IXP4XX_GPIO_STYLE_ACTIVE_LOW;
 		irq_type = IXP4XX_IRQ_LEVEL;
-	} else
+		break;
+	default:
 		return -EINVAL;
-
+	}
 	ixp4xx_config_irq(irq, irq_type);
 
 	if (line >= 8) {	/* pins 8-15 */
@@ -142,6 +148,8 @@ static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type)
 	*int_reg &= ~(IXP4XX_GPIO_STYLE_CLEAR <<
 	    		(line * IXP4XX_GPIO_STYLE_SIZE));
 
+	*IXP4XX_GPIO_GPISR = (1 << line);
+
 	/* Set the new style */
 	*int_reg |= (int_style << (line * IXP4XX_GPIO_STYLE_SIZE));
 
@@ -169,7 +177,7 @@ static void ixp4xx_irq_ack(unsigned int irq)
 	int line = (irq < 32) ? irq2gpio[irq] : -1;
 
 	if (line >= 0)
-		gpio_line_isr_clear(line);
+		*IXP4XX_GPIO_GPISR = (1 << line);
 }
 
 /*
@@ -330,11 +338,28 @@ static struct platform_device *ixp46x_devices[] __initdata = {
 	&ixp46x_i2c_controller
 };
 
+unsigned long ixp4xx_exp_bus_size;
+EXPORT_SYMBOL(ixp4xx_exp_bus_size);
+
 void __init ixp4xx_sys_init(void)
 {
+	ixp4xx_exp_bus_size = SZ_16M;
+
 	if (cpu_is_ixp46x()) {
+		int region;
+
 		platform_add_devices(ixp46x_devices,
 				ARRAY_SIZE(ixp46x_devices));
+
+		for (region = 0; region < 7; region++) {
+			if((*(IXP4XX_EXP_REG(0x4 * region)) & 0x200)) {
+				ixp4xx_exp_bus_size = SZ_32M;
+				break;
+			}
+		}
 	}
+
+	printk("IXP4xx: Using %luMiB expansion bus window size\n",
+			ixp4xx_exp_bus_size >> 20);
 }