[Blackfin] arch:Fix BUG [#3876] pfbutton test for BTN3 on bf533 don't show complete info

 - Buttons on the BF533-STAMP board are not inverted
 - Fix spurious GPIO Interrupt caused during set irq_type for edge triggered interrupts

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/mach-bf533/boards/stamp.c

@@ -423,9 +423,9 @@ static struct platform_device bfin_pata_device = {
 #include <linux/gpio_keys.h>
 
 static struct gpio_keys_button bfin_gpio_keys_table[] = {
-	{BTN_0, GPIO_PF5, 1, "gpio-keys: BTN0"},
-	{BTN_1, GPIO_PF6, 1, "gpio-keys: BTN1"},
-	{BTN_2, GPIO_PF8, 1, "gpio-keys: BTN2"},
+	{BTN_0, GPIO_PF5, 0, "gpio-keys: BTN0"},
+	{BTN_1, GPIO_PF6, 0, "gpio-keys: BTN1"},
+	{BTN_2, GPIO_PF8, 0, "gpio-keys: BTN2"},
 };
 
 static struct gpio_keys_platform_data bfin_gpio_keys_data = {

arch/blackfin/mach-common/ints-priority.c

@@ -430,16 +430,8 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
 		return 0;
 	}
 
+	set_gpio_inen(gpionr, 0);
 	set_gpio_dir(gpionr, 0);
-	set_gpio_inen(gpionr, 1);
-
-	if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
-		gpio_edge_triggered[gpio_bank(gpionr)] |= gpio_bit(gpionr);
-		set_gpio_edge(gpionr, 1);
-	} else {
-		set_gpio_edge(gpionr, 0);
-		gpio_edge_triggered[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
-	}
 
 	if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
 	    == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
@@ -452,6 +444,18 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
 	else
 		set_gpio_polar(gpionr, 0);	/* high or rising edge denoted by zero */
 
+	if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
+		set_gpio_edge(gpionr, 1);
+		set_gpio_inen(gpionr, 1);
+		gpio_edge_triggered[gpio_bank(gpionr)] |= gpio_bit(gpionr);
+		set_gpio_data(gpionr, 0);
+
+	} else {
+		set_gpio_edge(gpionr, 0);
+		gpio_edge_triggered[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
+		set_gpio_inen(gpionr, 1);
+	}
+
 	SSYNC();
 
 	if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))