mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 19:53:59 +08:00
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* linux/arch/arm/mach-s3c2440/dsc.c
|
|
*
|
|
* Copyright (c) 2004-2005 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* Samsung S3C2440 Drive Strength Control 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/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include <mach/regs-gpio.h>
|
|
#include <mach/regs-dsc.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/s3c2440.h>
|
|
|
|
int s3c2440_set_dsc(unsigned int pin, unsigned int value)
|
|
{
|
|
void __iomem *base;
|
|
unsigned long val;
|
|
unsigned long flags;
|
|
unsigned long mask;
|
|
|
|
base = (pin & S3C2440_SELECT_DSC1) ? S3C2440_DSC1 : S3C2440_DSC0;
|
|
mask = 3 << S3C2440_DSC_GETSHIFT(pin);
|
|
|
|
local_irq_save(flags);
|
|
|
|
val = __raw_readl(base);
|
|
val &= ~mask;
|
|
val |= value & mask;
|
|
__raw_writel(val, base);
|
|
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(s3c2440_set_dsc);
|