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 #include <mach/sysmmu.h>
  30
  31 #include "common.h"
  32 #include "clock-exynos4.h"
  33
  34 #ifdef CONFIG_PM_SLEEP
  35 static struct sleep_save exynos4210_clock_save[] = {
  36         SAVE_ITEM(EXYNOS4_CLKSRC_IMAGE),
  37         SAVE_ITEM(EXYNOS4_CLKDIV_IMAGE),
  38         SAVE_ITEM(EXYNOS4210_CLKSRC_LCD1),
  39         SAVE_ITEM(EXYNOS4210_CLKDIV_LCD1),
  40         SAVE_ITEM(EXYNOS4210_CLKSRC_MASK_LCD1),
  41         SAVE_ITEM(EXYNOS4210_CLKGATE_IP_IMAGE),
  42         SAVE_ITEM(EXYNOS4210_CLKGATE_IP_LCD1),
  43         SAVE_ITEM(EXYNOS4210_CLKGATE_IP_PERIR),
  44 };
  45 #endif
  46
  47 static struct clksrc_clk *sysclks[] = {
  48         /* nothing here yet */
  49 };
  50
  51 static struct clksrc_clk exynos4210_clk_mout_g2d0 = {
  52         .clk    = {
  53                 .name           = "mout_g2d0",
  54         },
  55         .sources = &exynos4_clkset_mout_g2d0,
  56         .reg_src = { .reg = EXYNOS4_CLKSRC_IMAGE, .shift = 0, .size = 1 },
  57 };
  58
  59 static struct clksrc_clk exynos4210_clk_mout_g2d1 = {
  60         .clk    = {
  61                 .name           = "mout_g2d1",
  62         },
  63         .sources = &exynos4_clkset_mout_g2d1,
  64         .reg_src = { .reg = EXYNOS4_CLKSRC_IMAGE, .shift = 4, .size = 1 },
  65 };
  66
  67 static struct clk *exynos4210_clkset_mout_g2d_list[] = {
  68         [0] = &exynos4210_clk_mout_g2d0.clk,
  69         [1] = &exynos4210_clk_mout_g2d1.clk,
  70 };
  71
  72 static struct clksrc_sources exynos4210_clkset_mout_g2d = {
  73         .sources        = exynos4210_clkset_mout_g2d_list,
  74         .nr_sources     = ARRAY_SIZE(exynos4210_clkset_mout_g2d_list),
  75 };
  76
  77 static int exynos4_clksrc_mask_lcd1_ctrl(struct clk *clk, int enable)
  78 {
  79         return s5p_gatectrl(EXYNOS4210_CLKSRC_MASK_LCD1, clk, enable);
  80 }
  81
  82 static struct clksrc_clk clksrcs[] = {
  83         {
  84                 .clk            = {
  85                         .name           = "sclk_sata",
  86                         .id             = -1,
  87                         .enable         = exynos4_clksrc_mask_fsys_ctrl,
  88                         .ctrlbit        = (1 << 24),
  89                 },
  90                 .sources = &exynos4_clkset_mout_corebus,
  91                 .reg_src = { .reg = EXYNOS4_CLKSRC_FSYS, .shift = 24, .size = 1 },
  92                 .reg_div = { .reg = EXYNOS4_CLKDIV_FSYS0, .shift = 20, .size = 4 },
  93         }, {
  94                 .clk            = {
  95                         .name           = "sclk_fimd",
  96                         .devname        = "exynos4-fb.1",
  97                         .enable         = exynos4_clksrc_mask_lcd1_ctrl,
  98                         .ctrlbit        = (1 << 0),
  99                 },
 100                 .sources = &exynos4_clkset_group,
 101                 .reg_src = { .reg = EXYNOS4210_CLKSRC_LCD1, .shift = 0, .size = 4 },
 102                 .reg_div = { .reg = EXYNOS4210_CLKDIV_LCD1, .shift = 0, .size = 4 },
 103         }, {
 104                 .clk    = {
 105                         .name           = "sclk_fimg2d",
 106                 },
 107                 .sources = &exynos4210_clkset_mout_g2d,
 108                 .reg_src = { .reg = EXYNOS4_CLKSRC_IMAGE, .shift = 8, .size = 1 },
 109                 .reg_div = { .reg = EXYNOS4_CLKDIV_IMAGE, .shift = 0, .size = 4 },
 110         },
 111 };
 112
 113 static struct clk init_clocks_off[] = {
 114         {
 115                 .name           = "sataphy",
 116                 .id             = -1,
 117                 .parent         = &exynos4_clk_aclk_133.clk,
 118                 .enable         = exynos4_clk_ip_fsys_ctrl,
 119                 .ctrlbit        = (1 << 3),
 120         }, {
 121                 .name           = "sata",
 122                 .id             = -1,
 123                 .parent         = &exynos4_clk_aclk_133.clk,
 124                 .enable         = exynos4_clk_ip_fsys_ctrl,
 125                 .ctrlbit        = (1 << 10),
 126         }, {
 127                 .name           = "fimd",
 128                 .devname        = "exynos4-fb.1",
 129                 .enable         = exynos4_clk_ip_lcd1_ctrl,
 130                 .ctrlbit        = (1 << 0),
 131         }, {
 132                 .name           = SYSMMU_CLOCK_NAME,
 133                 .devname        = SYSMMU_CLOCK_DEVNAME(2d, 14),
 134                 .enable         = exynos4_clk_ip_image_ctrl,
 135                 .ctrlbit        = (1 << 3),
 136         }, {
 137                 .name           = SYSMMU_CLOCK_NAME,
 138                 .devname        = SYSMMU_CLOCK_DEVNAME(fimd1, 11),
 139                 .enable         = exynos4_clk_ip_lcd1_ctrl,
 140                 .ctrlbit        = (1 << 4),
 141         }, {
 142                 .name           = "fimg2d",
 143                 .enable         = exynos4_clk_ip_image_ctrl,
 144                 .ctrlbit        = (1 << 0),
 145         },
 146 };
 147
 148 #ifdef CONFIG_PM_SLEEP
 149 static int exynos4210_clock_suspend(void)
 150 {
 151         s3c_pm_do_save(exynos4210_clock_save, ARRAY_SIZE(exynos4210_clock_save));
 152
 153         return 0;
 154 }
 155
 156 static void exynos4210_clock_resume(void)
 157 {
 158         s3c_pm_do_restore_core(exynos4210_clock_save, ARRAY_SIZE(exynos4210_clock_save));
 159 }
 160
 161 #else
 162 #define exynos4210_clock_suspend NULL
 163 #define exynos4210_clock_resume NULL
 164 #endif
 165
 166 static struct syscore_ops exynos4210_clock_syscore_ops = {
 167         .suspend        = exynos4210_clock_suspend,
 168         .resume         = exynos4210_clock_resume,
 169 };
 170
 171 void __init exynos4210_register_clocks(void)
 172 {
 173         int ptr;
 174
 175         exynos4_clk_mout_mpll.reg_src.reg = EXYNOS4_CLKSRC_CPU;
 176         exynos4_clk_mout_mpll.reg_src.shift = 8;
 177         exynos4_clk_mout_mpll.reg_src.size = 1;
 178
 179         for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++)
 180                 s3c_register_clksrc(sysclks[ptr], 1);
 181
 182         s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
 183
 184         s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
 185         s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
 186
 187         register_syscore_ops(&exynos4210_clock_syscore_ops);
 188 }