text: /*
   * arch/sh/kernel/cpu/sh2a/clock-sh7201.c
   *
   * SH7201 support for the clock framework
   *
   *  Copyright (C) 2008 Peter Griffin  <pgriffin@mpc-data.co.uk>
   *
   * Based on clock-sh4.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 const int pll1rate[]={1,2,3,4,6,8};
  static const int pfc_divisors[]={1,2,3,4,6,8,12};
  #define ifc_divisors pfc_divisors
  
  #if (CONFIG_SH_CLK_MD == 0)
  #define PLL2 (4)
  #elif (CONFIG_SH_CLK_MD == 2)
  #define PLL2 (2)
  #elif (CONFIG_SH_CLK_MD == 3)
  #define PLL2 (1)
  #else
  #error "Illegal Clock Mode!"
  #endif
  
  static void master_clk_init(struct clk *clk)
  {
  	return 10000000 * PLL2 * pll1rate[(ctrl_inw(FREQCR) >> 8) & 0x0007];
  }
  
  static struct clk_ops sh7201_master_clk_ops = {
  	.init		= master_clk_init,
  };
  
  static unsigned long module_clk_recalc(struct clk *clk)
  {
  	int idx = (ctrl_inw(FREQCR) & 0x0007);
  	return clk->parent->rate / pfc_divisors[idx];
  }
  
  static struct clk_ops sh7201_module_clk_ops = {
  	.recalc		= module_clk_recalc,
  };
  
  static unsigned long bus_clk_recalc(struct clk *clk)
  {
  	int idx = (ctrl_inw(FREQCR) & 0x0007);
  	return clk->parent->rate / pfc_divisors[idx];
  }
  
  static struct clk_ops sh7201_bus_clk_ops = {
  	.recalc		= bus_clk_recalc,
  };
  
  static unsigned long cpu_clk_recalc(struct clk *clk)
  {
  	int idx = ((ctrl_inw(FREQCR) >> 4) & 0x0007);
  	return clk->parent->rate / ifc_divisors[idx];
  }
  
  static struct clk_ops sh7201_cpu_clk_ops = {
  	.recalc		= cpu_clk_recalc,
  };
  
  static struct clk_ops *sh7201_clk_ops[] = {
  	&sh7201_master_clk_ops,
  	&sh7201_module_clk_ops,
  	&sh7201_bus_clk_ops,
  	&sh7201_cpu_clk_ops,
  };
  
  void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
  {
  	if (idx < ARRAY_SIZE(sh7201_clk_ops))
  		*ops = sh7201_clk_ops[idx];
  }
  