1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2013 John Crispin <john@phrozen.org>
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/export.h>
11 #include <linux/clkdev.h>
12 #include <linux/clk.h>
13 #include <linux/clk-provider.h>
14
15 #include <asm/time.h>
16
17 #include "common.h"
18
ralink_clk_add(const char * dev,unsigned long rate)19 void ralink_clk_add(const char *dev, unsigned long rate)
20 {
21 struct clk *clk = clk_register_fixed_rate(NULL, dev, NULL, 0, rate);
22
23 if (!clk)
24 panic("failed to add clock");
25
26 clkdev_create(clk, NULL, "%s", dev);
27 }
28
plat_time_init(void)29 void __init plat_time_init(void)
30 {
31 struct clk *clk;
32
33 ralink_of_remap();
34
35 ralink_clk_init();
36 clk = clk_get_sys("cpu", NULL);
37 if (IS_ERR(clk))
38 panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
39 pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
40 mips_hpt_frequency = clk_get_rate(clk) / 2;
41 clk_put(clk);
42 timer_probe();
43 }
44