1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
 4 *  JZ4740 platform timer support
 5 */
 6
 7#include <linux/export.h>
 8#include <linux/io.h>
 9#include <linux/init.h>
10#include <linux/kernel.h>
11
12#include <asm/mach-jz4740/base.h>
13#include <asm/mach-jz4740/timer.h>
14
15void __iomem *jz4740_timer_base;
16EXPORT_SYMBOL_GPL(jz4740_timer_base);
17
18void jz4740_timer_enable_watchdog(void)
19{
20	writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR);
21}
22EXPORT_SYMBOL_GPL(jz4740_timer_enable_watchdog);
23
24void jz4740_timer_disable_watchdog(void)
25{
26	writel(BIT(16), jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
27}
28EXPORT_SYMBOL_GPL(jz4740_timer_disable_watchdog);
29
30void __init jz4740_timer_init(void)
31{
32	jz4740_timer_base = ioremap(JZ4740_TCU_BASE_ADDR, 0x100);
33
34	if (!jz4740_timer_base)
35		panic("Failed to ioremap timer registers");
36
37	/* Disable all timer clocks except for those used as system timers */
38	writel(0x000100fc, jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
39
40	/* Timer irqs are unmasked by default, mask them */
41	writel(0x00ff00ff, jz4740_timer_base + JZ_REG_TIMER_MASK_SET);
42}