initial_commit

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/irq.c b/arch/arm/mach-kirkwood/irq.c
new file mode 100644
index 00000000..05d193a2
--- /dev/null
+++ b/arch/arm/mach-kirkwood/irq.c
@@ -0,0 +1,49 @@
+/*
+ * arch/arm/mach-kirkwood/irq.c
+ *
+ * Kirkwood IRQ handling.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <mach/bridge-regs.h>
+#include <plat/irq.h>
+#include <asm/gpio.h>
+#include "common.h"
+
+static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
+	BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
+
+	orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
+}
+
+void __init kirkwood_init_irq(void)
+{
+	orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
+	orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
+
+	/*
+	 * Initialize gpiolib for GPIOs 0-49.
+	 */
+	orion_gpio_init(0, 32, GPIO_LOW_VIRT_BASE, 0,
+			IRQ_KIRKWOOD_GPIO_START);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
+
+	orion_gpio_init(32, 18, GPIO_HIGH_VIRT_BASE, 0,
+			IRQ_KIRKWOOD_GPIO_START + 32);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
+	irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23,
+				gpio_irq_handler);
+}