mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 16:30:53 +00:00
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
|
/* linux/arch/arm/mach-s3c2410/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.
|
||
|
|
*
|
||
|
|
* Modifications:
|
||
|
|
* 29-Aug-2004 BJD Start of drive-strength control
|
||
|
|
* 09-Nov-2004 BJD Added symbol export
|
||
|
|
* 11-Jan-2005 BJD Include fix
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
#include <asm/mach/arch.h>
|
||
|
|
#include <asm/mach/map.h>
|
||
|
|
#include <asm/mach/irq.h>
|
||
|
|
|
||
|
|
#include <asm/hardware.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <asm/irq.h>
|
||
|
|
|
||
|
|
#include <asm/arch/regs-gpio.h>
|
||
|
|
#include <asm/arch/regs-dsc.h>
|
||
|
|
|
||
|
|
#include "cpu.h"
|
||
|
|
#include "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);
|