arch/arm/mach-exynos/clock-exynos4210.c

   1 /*
   2  * Copyright (c) 2011-2012 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * EXYNOS4210 - Clock support
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/err.h>
  14 #include <linux/clk.h>
  15 #include <linux/io.h>
  16 #include <linux/syscore_ops.h>
  17
  18 #include <plat/cpu-freq.h>
  19 #include <plat/clock.h>
  20 #include <plat/cpu.h>
  21 #include <plat/pll.h>
  22 #include <plat/s5p-clock.h>
  23 #include <plat/clock-clksrc.h>
  24 #include <plat/pm.h>
  25
  26 #include <mach/hardware.h>
  27 #include <mach/map.h>
  28 #include <mach/regs-clock.h>
  29
  30 #include "common.h"
  31 #include "clock-exynos4.h"
  32
  33 #ifdef CONFIG_PM_SLEEP
  34 static struct sleep_save exynos4210_clock_save[] = {
  35         SAVE_ITEM(EXYNOS4_CLKSRC_IMAGE),
  36         SAVE_ITEM(EXYNOS4_CLKDIV_IMAGE),
  37         SAVE_ITEM(EXYNOS4210_CLKSRC_LCD1),
  38         SAVE_ITEM(EXYNOS4210_CLKDIV_LCD1),
  39         SAVE_ITEM(EXYNOS4210_CLKSRC_MASK_LCD1),
  40         SAVE_ITEM(EXYNOS4210_CLKGATE_IP_IMAGE),
  41         SAVE_ITEM(EXYNOS4210_CLKGATE_IP_LCD1),
  42         SAVE_ITEM(EXYNOS4210_CLKGATE_IP_PERIR),
  43 };
  44 #endif
  45
  46 static struct clksrc_clk *sysclks[] = {
  47         /* nothing here yet */
  48 };
  49
  50 static struct clksrc_clk exynos4210_clk_mout_g2d0 = {
  51         .clk    = {
  52                 .name           = "mout_g2d0",
  53         },
  54         .sources = &exynos4_clkset_mout_g2d0,
  55         .reg_src = { .reg = EXYNOS4_CLKSRC_IMAGE, .shift = 0, .size = 1 },
  56 };
  57
  58 static struct clksrc_clk exynos4210_clk_mout_g2d1 = {
  59         .clk    = {
  60                 .name           = "mout_g2d1",
  61         },
  62         .sources = &exynos4_clkset_mout_g2d1,
  63         .reg_src = { .reg = EXYNOS4_CLKSRC_IMAGE, .shift = 4, .size = 1 },
  64 };
  65
  66 static struct clk *exynos4210_clkset_mout_g2d_list[] = {
  67         [0] = &exynos4210_clk_mout_g2d0.clk,
  68         [1] = &exynos4210_clk_mout_g2d1.clk,
  69 };
  70
  71 static struct clksrc_sources exynos4210_clkset_mout_g2d = {
  72         .sources        = exynos4210_clkset_mout_g2d_list,
  73         .nr_sources     = ARRAY_SIZE(exynos4210_clkset_mout_g2d_list),
  74 };
  75
  76 static int exynos4_clksrc_mask_lcd1_ctrl(struct clk *clk, int enable)
  77 {
  78         return s5p_gatectrl(EXYNOS4210_CLKSRC_MASK_LCD1, clk, enable);
  79 }
  80
  81 static struct clksrc_clk clksrcs[] = {
  82         {
  83                 .clk            = {
  84                         .name           = "sclk_sata",
  85                         .id             = -1,
  86                         .enable         = exynos4_clksrc_mask_fsys_ctrl,
  87                         .ctrlbit        = (1 << 24),
  88                 },
  89                 .sources = &exynos4_clkset_mout_corebus,
  90                 .reg_src = { .reg = EXYNOS4_CLKSRC_FSYS, .shift = 24, .size = 1 },
  91                 .reg_div = { .reg = EXYNOS4_CLKDIV_FSYS0, .shift = 20, .size = 4 },
  92         }, {
  93                 .clk            = {
  94                         .name           = "sclk_fimd",
  95                         .devname        = "exynos4-fb.1",
  96                         .enable         = exynos4_clksrc_mask_lcd1_ctrl,
  97                         .ctrlbit        = (1 << 0),
  98                 },
  99                 .sources = &exynos4_clkset_group,
 100                 .reg_src = { .reg = EXYNOS4210_CLKSRC_LCD1, .shift = 0, .size = 4 },
 101                 .reg_div = { .reg = EXYNOS4210_CLKDIV_LCD1, .shift = 0, .size = 4 },
 102         }, {
 103                 .clk    = {
 104                         .name           = "sclk_fimg2d",
 105                 },
 106                 .sources = &exynos4210_clkset_mout_g2d,
 107                 .reg_src = { .reg = EXYNOS4_CLKSRC_IMAGE, .shift = 8, .size = 1 },
 108                 .reg_div = { .reg = EXYNOS4_CLKDIV_IMAGE, .shift = 0, .size = 4 },
 109         },
 110 };
 111
 112 static struct clk init_clocks_off[] = {
 113         {
 114                 .name           = "sataphy",
 115                 .id             = -1,
 116                 .parent         = &exynos4_clk_aclk_133.clk,
 117                 .enable         = exynos4_clk_ip_fsys_ctrl,
 118                 .ctrlbit        = (1 << 3),
 119         }, {
 120                 .name           = "sata",
 121                 .id             = -1,
 122                 .parent         = &exynos4_clk_aclk_133.clk,
 123                 .enable         = exynos4_clk_ip_fsys_ctrl,
 124                 .ctrlbit        = (1 << 10),
 125         }, {
 126                 .name           = "fimd",
 127                 .devname        = "exynos4-fb.1",
 128                 .enable         = exynos4_clk_ip_lcd1_ctrl,
 129                 .ctrlbit        = (1 << 0),
 130         }, {
 131                 .name           = "sysmmu",
 132                 .devname        = "exynos-sysmmu.9",
 133                 .enable         = exynos4_clk_ip_image_ctrl,
 134                 .ctrlbit        = (1 << 3),
 135         }, {
 136                 .name           = "sysmmu",
 137                 .devname        = "exynos-sysmmu.11",
 138                 .enable         = exynos4_clk_ip_lcd1_ctrl,
 139                 .ctrlbit        = (1 << 4),
 140         }, {
 141                 .name           = "fimg2d",
 142                 .enable         = exynos4_clk_ip_image_ctrl,
 143                 .ctrlbit        = (1 << 0),
 144         },
 145 };
 146
 147 #ifdef CONFIG_PM_SLEEP
 148 static int exynos4210_clock_suspend(void)
 149 {
 150         s3c_pm_do_save(exynos4210_clock_save, ARRAY_SIZE(exynos4210_clock_save));
 151
 152         return 0;
 153 }
 154
 155 static void exynos4210_clock_resume(void)
 156 {
 157         s3c_pm_do_restore_core(exynos4210_clock_save, ARRAY_SIZE(exynos4210_clock_save));
 158 }
 159
 160 #else
 161 #define exynos4210_clock_suspend NULL
 162 #define exynos4210_clock_resume NULL
 163 #endif
 164
 165 static struct syscore_ops exynos4210_clock_syscore_ops = {
 166         .suspend        = exynos4210_clock_suspend,
 167         .resume         = exynos4210_clock_resume,
 168 };
 169
 170 void __init exynos4210_register_clocks(void)
 171 {
 172         int ptr;
 173
 174         exynos4_clk_mout_mpll.reg_src.reg = EXYNOS4_CLKSRC_CPU;
 175         exynos4_clk_mout_mpll.reg_src.shift = 8;
 176         exynos4_clk_mout_mpll.reg_src.size = 1;
 177
 178         for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++)
 179                 s3c_register_clksrc(sysclks[ptr], 1);
 180
 181         s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
 182
 183         s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
 184         s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
 185
 186         register_syscore_ops(&exynos4210_clock_syscore_ops);
 187 }