LXR linux/arch/mips/ralink/clk.c

   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
  19void 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
  29void __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