arch/arm/mach-shmobile/clock.c

   1 /*
   2  * SH-Mobile Clock Framework
   3  *
   4  * Copyright (C) 2010  Magnus Damm
   5  *
   6  * Used together with arch/arm/common/clkdev.c and drivers/sh/clk.c.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  */
  18
  19 #include <linux/export.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/sh_clk.h>
  23
  24 #include "clock.h"
  25 #include "common.h"
  26
  27 unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk)
  28 {
  29         struct clk_ratio *p = clk->priv;
  30
  31         return clk->parent->rate / p->div * p->mul;
  32 };
  33
  34 struct sh_clk_ops shmobile_fixed_ratio_clk_ops = {
  35         .recalc = shmobile_fixed_ratio_clk_recalc,
  36 };
  37
  38 int __init shmobile_clk_init(void)
  39 {
  40         /* Kick the child clocks.. */
  41         recalculate_root_clocks();
  42
  43         /* Enable the necessary init clocks */
  44         clk_enable_init_clocks();
  45
  46         return 0;
  47 }