1 files changed, 72 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c2410/gpio.c b/arch/arm/mach-s3c2410/gpio.c
new file mode 100644
index 00000000..9664e011
--- /dev/null
+++ b/arch/arm/mach-s3c2410/gpio.c
@@ -0,0 +1,72 @@
+/* linux/arch/arm/mach-s3c2410/gpio.c
+ *
+ * Copyright (c) 2004-2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 GPIO support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/gpio-fns.h>
+#include <asm/irq.h>
+
+#include <mach/regs-gpio.h>
+
+int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
+			   unsigned int config)
+{
+	void __iomem *reg = S3C24XX_EINFLT0;
+	unsigned long flags;
+	unsigned long val;
+
+	if (pin < S3C2410_GPG(8) || pin > S3C2410_GPG(15))
+		return -EINVAL;
+
+	config &= 0xff;
+
+	pin -= S3C2410_GPG(8);
+	reg += pin & ~3;
+
+	local_irq_save(flags);
+
+	/* update filter width and clock source */
+
+	val = __raw_readl(reg);
+	val &= ~(0xff << ((pin & 3) * 8));
+	val |= config << ((pin & 3) * 8);
+	__raw_writel(val, reg);
+
+	/* update filter enable */
+
+	val = __raw_readl(S3C24XX_EXTINT2);
+	val &= ~(1 << ((pin * 4) + 3));
+	val |= on << ((pin * 4) + 3);
+	__raw_writel(val, S3C24XX_EXTINT2);
+
+	local_irq_restore(flags);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(s3c2410_gpio_irqfilter);