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

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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>
This commit is contained in:
Ben Dooks 2008-01-28 13:01:19 +01:00 committed by Russell King
parent bdbea34ddd
commit 67d729adc0
4 changed files with 71 additions and 0 deletions
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1
arch/arm/mach-s3c2412/Makefile
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@ -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

60
arch/arm/mach-s3c2412/gpio.c Normal file
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@ -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);

5
include/asm-arm/arch-s3c2410/hardware.h
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@ -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__ */

5
include/asm-arm/arch-s3c2410/regs-gpio.h
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@ -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))