1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
 4 * Author: Fuxin Zhang, zhangfx@lemote.com
 5 *
 6 * Copyright (C) 2009 Lemote Inc.
 7 * Author: Wu Zhangjin, wuzhangjin@gmail.com
 8 */
 9
10#include <asm/time.h>
11#include <asm/hpet.h>
12
13#include <loongson.h>
14#include <linux/clk.h>
15#include <linux/of_clk.h>
16
17void __init plat_time_init(void)
18{
19	struct clk *clk;
20	struct device_node *np;
21
22	if (loongson_sysconf.fw_interface == LOONGSON_DTB) {
23		of_clk_init(NULL);
24
25		np = of_get_cpu_node(0, NULL);
26		if (!np) {
27			pr_err("Failed to get CPU node\n");
28			return;
29		}
30
31		clk = of_clk_get(np, 0);
32		if (IS_ERR(clk)) {
33			pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
34			return;
35		}
36
37		cpu_clock_freq = clk_get_rate(clk);
38		clk_put(clk);
39	}
40
41	/* setup mips r4k timer */
42	mips_hpt_frequency = cpu_clock_freq / 2;
43
44#ifdef CONFIG_RS780_HPET
45	setup_hpet_timer();
46#endif
47}