diff options
Diffstat (limited to 'arch/mips/jz4740/timer.c')
-rw-r--r-- | arch/mips/jz4740/timer.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/jz4740/timer.c b/arch/mips/jz4740/timer.c new file mode 100644 index 000000000..777877fee --- /dev/null +++ b/arch/mips/jz4740/timer.c @@ -0,0 +1,51 @@ +/* + * 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/export.h> +#include <linux/io.h> +#include <linux/init.h> +#include <linux/kernel.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); +} |