/* * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> * JZ4740 platform timer support * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. * */ #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <asm/mach-jz4740/base.h> #include <asm/mach-jz4740/timer.h> void __iomem *jz4740_timer_base; EXPORT_SYMBOL_GPL(jz4740_timer_base); void jz4740_timer_enable_watchdog(void) { writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR); } EXPORT_SYMBOL_GPL(jz4740_timer_enable_watchdog); void jz4740_timer_disable_watchdog(void) { writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_SET); } EXPORT_SYMBOL_GPL(jz4740_timer_disable_watchdog); void __init jz4740_timer_init(void) { jz4740_timer_base = ioremap(JZ4740_TCU_BASE_ADDR, 0x100); if (!jz4740_timer_base) panic("Failed to ioremap timer registers"); /* Disable all timer clocks except for those used as system timers */ writel(0x000100fc, jz4740_timer_base + JZ_REG_TIMER_STOP_SET); /* Timer irqs are unmasked by default, mask them */ writel(0x00ff00ff, jz4740_timer_base + JZ_REG_TIMER_MASK_SET); }