mirror of
https://github.com/torvalds/linux.git
synced 2024-11-17 17:41:44 +00:00
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>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
|
|
* 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 "timer.h"
|
|
|
|
#include <asm/mach-jz4740/base.h>
|
|
|
|
void __iomem *jz4740_timer_base;
|
|
|
|
void jz4740_timer_enable_watchdog(void)
|
|
{
|
|
writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR);
|
|
}
|
|
|
|
void jz4740_timer_disable_watchdog(void)
|
|
{
|
|
writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
|
|
}
|
|
|
|
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);
|
|
}
|