arch/mips/loongson1/common/clock.c

   1 /*
   2  * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
   3  *
   4  * This program is free software; you can redistribute  it and/or modify it
   5  * under  the terms of  the GNU General  Public License as published by the
   6  * Free Software Foundation;  either version 2 of the  License, or (at your
   7  * option) any later version.
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/err.h>
  12 #include <asm/time.h>
  13 #include <platform.h>
  14
  15 void __init plat_time_init(void)
  16 {
  17         struct clk *clk;
  18
  19         /* Initialize LS1X clocks */
  20         ls1x_clk_init();
  21
  22         /* setup mips r4k timer */
  23         clk = clk_get(NULL, "cpu");
  24         if (IS_ERR(clk))
  25                 panic("unable to get cpu clock, err=%ld", PTR_ERR(clk));
  26
  27         mips_hpt_frequency = clk_get_rate(clk) / 2;
  28 }