1 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/mach-stmp3xxx/irq.c b/arch/arm/mach-stmp3xxx/irq.c
new file mode 100644
index 000000000000..19bd285c8398
--- /dev/null
+++ b/arch/arm/mach-stmp3xxx/irq.c
@@ -0,0 +1,86 @@
+/*
+ * Freescale STMP37XX/STMP378X common interrupt handling code
+ *
+ * Author: Vladislav Buzov <vbuzov@embeddedalley.com>
+ *
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/sysdev.h>
+
+#include <mach/regs-icoll.h>
+
+void __init stmp3xxx_init_irq(struct irq_chip *chip1,
+		struct irq_chip *chip2, int (*is_chip_2)(int))
+{
+	unsigned int i;
+	struct irq_chip *chip;
+
+	/* Reset the interrupt controller */
+	HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_CLKGATE);
+	udelay(10);
+	HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_SFTRST);
+	udelay(10);
+	HW_ICOLL_CTRL_SET(BM_ICOLL_CTRL_SFTRST);
+	while (!(HW_ICOLL_CTRL_RD() & BM_ICOLL_CTRL_CLKGATE))
+		continue;
+	HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_SFTRST | BM_ICOLL_CTRL_CLKGATE);
+
+	/* Disable all interrupts initially */
+	for (i = 0; i < NR_IRQS; i++) {
+		chip = chip1;
+		if (is_chip_2 && is_chip_2(i))
+			chip = chip2;
+		chip->mask(i);
+		set_irq_chip(i, chip);
+		set_irq_handler(i, handle_level_irq);
+		set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+	}
+
+	/* Ensure vector is cleared */
+	HW_ICOLL_LEVELACK_WR(1);
+	HW_ICOLL_LEVELACK_WR(2);
+	HW_ICOLL_LEVELACK_WR(4);
+	HW_ICOLL_LEVELACK_WR(8);
+
+	HW_ICOLL_VECTOR_WR(0);
+	/* Barrier */
+	(void) HW_ICOLL_STAT_RD();
+}
+
+#define irq_suspend NULL
+#define irq_resume NULL
+
+static struct sysdev_class irq_class = {
+	.name		= "irq",
+	.suspend	= irq_suspend,
+	.resume		= irq_resume,
+};
+
+static struct sys_device irq_device = {
+	.id	= 0,
+	.cls	= &irq_class,
+};
+
+static int __init irq_init_sysfs(void)
+{
+	int ret = sysdev_class_register(&irq_class);
+	if (ret == 0)
+		ret = sysdev_register(&irq_device);
+	return ret;
+}
+
+device_initcall(irq_init_sysfs);