ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / arch / arm / mach-s3c2440 / dsc.c
blob2995ff5681bbde83f82c1ee065950d6611959bf5
1 /* linux/arch/arm/mach-s3c2440/dsc.c
3 * Copyright (c) 2004-2005 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * Samsung S3C2440 Drive Strength Control support
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/init.h>
17 #include <linux/module.h>
19 #include <asm/mach/arch.h>
20 #include <asm/mach/map.h>
21 #include <asm/mach/irq.h>
23 #include <asm/hardware.h>
24 #include <asm/io.h>
25 #include <asm/irq.h>
27 #include <asm/arch/regs-gpio.h>
28 #include <asm/arch/regs-dsc.h>
30 #include <asm/plat-s3c24xx/cpu.h>
31 #include <asm/plat-s3c24xx/s3c2440.h>
33 int s3c2440_set_dsc(unsigned int pin, unsigned int value)
35 void __iomem *base;
36 unsigned long val;
37 unsigned long flags;
38 unsigned long mask;
40 base = (pin & S3C2440_SELECT_DSC1) ? S3C2440_DSC1 : S3C2440_DSC0;
41 mask = 3 << S3C2440_DSC_GETSHIFT(pin);
43 local_irq_save(flags);
45 val = __raw_readl(base);
46 val &= ~mask;
47 val |= value & mask;
48 __raw_writel(val, base);
50 local_irq_restore(flags);
51 return 0;
54 EXPORT_SYMBOL(s3c2440_set_dsc);