/* 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 <asm/plat-s3c24xx/cpu.h> #include <asm/plat-s3c24xx/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);