[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>

4 files changed, 71 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2412/Makefile b/arch/arm/mach-s3c2412/Makefile
index 7b782c7df7b4..267f3348301e 100644
--- a/arch/arm/mach-s3c2412/Makefile
+++ b/arch/arm/mach-s3c2412/Makefile
@@ -12,6 +12,7 @@ obj-				:=
 obj-$(CONFIG_CPU_S3C2412)       += s3c2412.o
 obj-$(CONFIG_CPU_S3C2412)       += irq.o
 obj-$(CONFIG_CPU_S3C2412)       += clock.o
+obj-$(CONFIG_CPU_S3C2412)       += gpio.o
 obj-$(CONFIG_S3C2412_DMA)       += dma.o
 obj-$(CONFIG_S3C2412_PM)        += pm.o sleep.o
 
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);
diff --git a/include/asm-arm/arch-s3c2410/hardware.h b/include/asm-arm/arch-s3c2410/hardware.h
index 6dadf58ff984..faeaba514ffe 100644
--- a/include/asm-arm/arch-s3c2410/hardware.h
+++ b/include/asm-arm/arch-s3c2410/hardware.h
@@ -99,6 +99,11 @@ extern int s3c2440_set_dsc(unsigned int pin, unsigned int value);
 
 #endif /* CONFIG_CPU_S3C2440 */
 
+#ifdef CONFIG_CPU_S3C2412
+
+extern int s3c2412_gpio_set_sleepcfg(unsigned int pin, unsigned int state);
+
+#endif /* CONFIG_CPU_S3C2412 */
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/include/asm-arm/arch-s3c2410/regs-gpio.h b/include/asm-arm/arch-s3c2410/regs-gpio.h
index 1f089fb71a80..0ad75d716ded 100644
--- a/include/asm-arm/arch-s3c2410/regs-gpio.h
+++ b/include/asm-arm/arch-s3c2410/regs-gpio.h
@@ -1138,6 +1138,11 @@
 #define S3C2412_GPHSLPCON       S3C2410_GPIOREG(0x7C)
 
 /* definitions for each pin bit */
+#define S3C2412_GPIO_SLPCON_LOW  ( 0x00 )
+#define S3C2412_GPIO_SLPCON_HIGH ( 0x01 )
+#define S3C2412_GPIO_SLPCON_IN   ( 0x02 )
+#define S3C2412_GPIO_SLPCON_PULL ( 0x03 )
+
 #define S3C2412_SLPCON_LOW(x)   ( 0x00 << ((x) * 2))
 #define S3C2412_SLPCON_HIGH(x)  ( 0x01 << ((x) * 2))
 #define S3C2412_SLPCON_IN(x)    ( 0x02 << ((x) * 2))