544a732419
Add support for the timer/counter unit on a JZ4740 SoC. This code is used as a common base for the JZ4740 clocksource/clockevent implementation and PWM support. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1396/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
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* JZ4740 platform timer support
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "timer.h"
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#include <asm/mach-jz4740/base.h>
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void __iomem *jz4740_timer_base;
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void jz4740_timer_enable_watchdog(void)
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{
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writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR);
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}
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void jz4740_timer_disable_watchdog(void)
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{
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writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
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}
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void __init jz4740_timer_init(void)
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{
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jz4740_timer_base = ioremap(JZ4740_TCU_BASE_ADDR, 0x100);
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if (!jz4740_timer_base)
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panic("Failed to ioremap timer registers");
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/* Disable all timer clocks except for those used as system timers */
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writel(0x000100fc, jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
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/* Timer irqs are unmasked by default, mask them */
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writel(0x00ff00ff, jz4740_timer_base + JZ_REG_TIMER_MASK_SET);
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}
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