arch/arm/mach-shmobile/clock-sh7367.c

   1 /*
   2  * Preliminary clock framework support for sh7367
   3  *
   4  * Copyright (C) 2010  Magnus Damm
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18  */
  19 #include <linux/init.h>
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/list.h>
  23 #include <linux/clk.h>
  24
  25 struct clk {
  26         const char *name;
  27         unsigned long rate;
  28 };
  29
  30 #include <asm/clkdev.h>
  31
  32 int __clk_get(struct clk *clk)
  33 {
  34         return 1;
  35 }
  36 EXPORT_SYMBOL(__clk_get);
  37
  38 void __clk_put(struct clk *clk)
  39 {
  40 }
  41 EXPORT_SYMBOL(__clk_put);
  42
  43
  44 int clk_enable(struct clk *clk)
  45 {
  46         return 0;
  47 }
  48 EXPORT_SYMBOL(clk_enable);
  49
  50 void clk_disable(struct clk *clk)
  51 {
  52 }
  53 EXPORT_SYMBOL(clk_disable);
  54
  55 unsigned long clk_get_rate(struct clk *clk)
  56 {
  57         return clk ? clk->rate : 0;
  58 }
  59 EXPORT_SYMBOL(clk_get_rate);
  60
  61 /* a static peripheral clock for now - enough to get sh-sci working */
  62 static struct clk peripheral_clk = {
  63         .name       = "peripheral_clk",
  64         .rate       = 48000000,
  65 };
  66
  67 /* a static rclk for now - enough to get sh_cmt working */
  68 static struct clk r_clk = {
  69         .name       = "r_clk",
  70         .rate       = 32768,
  71 };
  72
  73 /* a static usb0 for now - enough to get r8a66597 working */
  74 static struct clk usb0_clk = {
  75         .name       = "usb0",
  76 };
  77
  78 /* a static keysc0 clk for now - enough to get sh_keysc working */
  79 static struct clk keysc0_clk = {
  80         .name       = "keysc0",
  81 };
  82
  83 static struct clk_lookup lookups[] = {
  84         {
  85                 .clk = &peripheral_clk,
  86         }, {
  87                 .clk = &r_clk,
  88         }, {
  89                 .clk = &usb0_clk,
  90         }, {
  91                 .clk = &keysc0_clk,
  92         }
  93 };
  94
  95 void __init sh7367_clock_init(void)
  96 {
  97         int i;
  98
  99         for (i = 0; i < ARRAY_SIZE(lookups); i++) {
 100                 lookups[i].con_id = lookups[i].clk->name;
 101                 clkdev_add(&lookups[i]);
 102         }
 103 }