text: /*
   * arch/sh/kernel/cpu/sh3/clock-sh7712.c
   *
   * SH7712 support for the clock framework
   *
   *  Copyright (C) 2007  Andrew Murray <amurray@mpc-data.co.uk>
   *
   * Based on arch/sh/kernel/cpu/sh3/clock-sh3.c
   *  Copyright (C) 2005  Paul Mundt
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   */
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <asm/clock.h>
  #include <asm/freq.h>
  #include <asm/io.h>
  
  static int multipliers[] = { 1, 2, 3 };
  static int divisors[]    = { 1, 2, 3, 4, 6 };
  
  static void master_clk_init(struct clk *clk)
  {
  	int frqcr = __raw_readw(FRQCR);
  	int idx = (frqcr & 0x0300) >> 8;
  
  	clk->rate *= multipliers[idx];
  }
  
  static struct clk_ops sh7712_master_clk_ops = {
  	.init		= master_clk_init,
  };
  
  static unsigned long module_clk_recalc(struct clk *clk)
  {
  	int frqcr = __raw_readw(FRQCR);
  	int idx = frqcr & 0x0007;
  
  	return clk->parent->rate / divisors[idx];
  }
  
  static struct clk_ops sh7712_module_clk_ops = {
  	.recalc		= module_clk_recalc,
  };
  
  static unsigned long cpu_clk_recalc(struct clk *clk)
  {
  	int frqcr = __raw_readw(FRQCR);
  	int idx = (frqcr & 0x0030) >> 4;
  
  	return clk->parent->rate / divisors[idx];
  }
  
  static struct clk_ops sh7712_cpu_clk_ops = {
  	.recalc		= cpu_clk_recalc,
  };
  
  static struct clk_ops *sh7712_clk_ops[] = {
  	&sh7712_master_clk_ops,
  	&sh7712_module_clk_ops,
  	&sh7712_cpu_clk_ops,
  };
  
  void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
  {
  	if (idx < ARRAY_SIZE(sh7712_clk_ops))
  		*ops = sh7712_clk_ops[idx];
  }
  