arch/sh/kernel/cpu/clock.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/sh/kernel/cpu/clock.c - SuperH clock framework
   4  *
   5  *  Copyright (C) 2005 - 2009  Paul Mundt
   6  *
   7  * This clock framework is derived from the OMAP version by:
   8  *
   9  *      Copyright (C) 2004 - 2008 Nokia Corporation
  10  *      Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
  11  *
  12  *  Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
  13  */
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/clk.h>
  17 #include <asm/clock.h>
  18 #include <asm/machvec.h>
  19
  20 int __init clk_init(void)
  21 {
  22         int ret;
  23
  24 #ifndef CONFIG_COMMON_CLK
  25         ret = arch_clk_init();
  26         if (unlikely(ret)) {
  27                 pr_err("%s: CPU clock registration failed.\n", __func__);
  28                 return ret;
  29         }
  30 #endif
  31
  32         if (sh_mv.mv_clk_init) {
  33                 ret = sh_mv.mv_clk_init();
  34                 if (unlikely(ret)) {
  35                         pr_err("%s: machvec clock initialization failed.\n",
  36                                __func__);
  37                         return ret;
  38                 }
  39         }
  40
  41 #ifndef CONFIG_COMMON_CLK
  42         /* Kick the child clocks.. */
  43         recalculate_root_clocks();
  44
  45         /* Enable the necessary init clocks */
  46         clk_enable_init_clocks();
  47 #endif
  48
  49         return ret;
  50 }
  51
  52