arch/sh/kernel/cpu/clock.c

   1 /*
   2  * arch/sh/kernel/cpu/clock.c - SuperH clock framework
   3  *
   4  *  Copyright (C) 2005 - 2009  Paul Mundt
   5  *
   6  * This clock framework is derived from the OMAP version by:
   7  *
   8  *      Copyright (C) 2004 - 2008 Nokia Corporation
   9  *      Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
  10  *
  11  *  Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
  12  *
  13  * This file is subject to the terms and conditions of the GNU General Public
  14  * License.  See the file "COPYING" in the main directory of this archive
  15  * for more details.
  16  */
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/clk.h>
  20 #include <asm/clock.h>
  21 #include <asm/machvec.h>
  22
  23 int __init clk_init(void)
  24 {
  25         int ret;
  26
  27 #ifndef CONFIG_COMMON_CLK
  28         ret = arch_clk_init();
  29         if (unlikely(ret)) {
  30                 pr_err("%s: CPU clock registration failed.\n", __func__);
  31                 return ret;
  32         }
  33 #endif
  34
  35         if (sh_mv.mv_clk_init) {
  36                 ret = sh_mv.mv_clk_init();
  37                 if (unlikely(ret)) {
  38                         pr_err("%s: machvec clock initialization failed.\n",
  39                                __func__);
  40                         return ret;
  41                 }
  42         }
  43
  44 #ifndef CONFIG_COMMON_CLK
  45         /* Kick the child clocks.. */
  46         recalculate_root_clocks();
  47
  48         /* Enable the necessary init clocks */
  49         clk_enable_init_clocks();
  50 #endif
  51
  52         return ret;
  53 }
  54
  55