[ARM] 4779/1: S3C2412: Add s3c2412_gpio_set_sleepcfg() call

Add s3c2412_gpio_set_sleepcfg() to allow the setting of the sleep
configuration of the GPIO blocks.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 60 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2412/gpio.c b/arch/arm/mach-s3c2412/gpio.c
new file mode 100644
index 000000000000..8e55c3a2eab8
--- /dev/null
+++ b/arch/arm/mach-s3c2412/gpio.c
@@ -0,0 +1,60 @@
+/* linux/arch/arm/mach-s3c2412/gpio.c
+ *
+ * Copyright (c) 2007 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://armlinux.simtec.co.uk/.
+ *
+ * S3C2412/S3C2413 specific GPIO support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <asm/arch/regs-gpio.h>
+
+#include <asm/hardware.h>
+
+int s3c2412_gpio_set_sleepcfg(unsigned int pin, unsigned int state)
+{
+        void __iomem *base = S3C24XX_GPIO_BASE(pin);
+        unsigned long offs = S3C2410_GPIO_OFFSET(pin);
+        unsigned long flags;
+        unsigned long slpcon;
+
+        offs *= 2;
+
+        if (pin < S3C2410_GPIO_BANKB)
+                return -EINVAL;
+
+        if (pin >= S3C2410_GPIO_BANKF &&
+            pin <= S3C2410_GPIO_BANKG)
+                return -EINVAL;
+
+        if (pin > (S3C2410_GPIO_BANKH + 32))
+                return -EINVAL;
+
+        local_irq_save(flags);
+
+        slpcon = __raw_readl(base + 0x0C);
+
+        slpcon &= ~(3 << offs);
+        slpcon |= state << offs;
+
+        __raw_writel(slpcon, base + 0x0C);
+
+        local_irq_restore(flags);
+
+        return 0;
+}
+
+EXPORT_SYMBOL(s3c2412_gpio_set_sleepcfg);