drivers/clk/samsung/clk-exynos5410.c

   1 /*
   2  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
   3  * Author: Tarek Dakhran <t.dakhran@samsung.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Common Clock Framework support for Exynos5410 SoC.
  10 */
  11
  12 #include <dt-bindings/clock/exynos5410.h>
  13
  14 #include <linux/clk.h>
  15 #include <linux/clkdev.h>
  16 #include <linux/clk-provider.h>
  17 #include <linux/of.h>
  18 #include <linux/of_address.h>
  19
  20 #include "clk.h"
  21
  22 #define APLL_LOCK               0x0
  23 #define APLL_CON0               0x100
  24 #define CPLL_LOCK               0x10020
  25 #define CPLL_CON0               0x10120
  26 #define MPLL_LOCK               0x4000
  27 #define MPLL_CON0               0x4100
  28 #define BPLL_LOCK               0x20010
  29 #define BPLL_CON0               0x20110
  30 #define KPLL_LOCK               0x28000
  31 #define KPLL_CON0               0x28100
  32
  33 #define SRC_CPU                 0x200
  34 #define DIV_CPU0                0x500
  35 #define SRC_CPERI1              0x4204
  36 #define DIV_TOP0                0x10510
  37 #define DIV_TOP1                0x10514
  38 #define DIV_FSYS1               0x1054c
  39 #define DIV_FSYS2               0x10550
  40 #define DIV_PERIC0              0x10558
  41 #define SRC_TOP0                0x10210
  42 #define SRC_TOP1                0x10214
  43 #define SRC_TOP2                0x10218
  44 #define SRC_FSYS                0x10244
  45 #define SRC_PERIC0              0x10250
  46 #define SRC_MASK_FSYS           0x10340
  47 #define SRC_MASK_PERIC0         0x10350
  48 #define GATE_BUS_FSYS0          0x10740
  49 #define GATE_IP_FSYS            0x10944
  50 #define GATE_IP_PERIC           0x10950
  51 #define GATE_IP_PERIS           0x10960
  52 #define SRC_CDREX               0x20200
  53 #define SRC_KFC                 0x28200
  54 #define DIV_KFC0                0x28500
  55
  56 /* list of PLLs */
  57 enum exynos5410_plls {
  58         apll, cpll, mpll,
  59         bpll, kpll,
  60         nr_plls                 /* number of PLLs */
  61 };
  62
  63 /* list of all parent clocks */
  64 PNAME(apll_p)           = { "fin_pll", "fout_apll", };
  65 PNAME(bpll_p)           = { "fin_pll", "fout_bpll", };
  66 PNAME(cpll_p)           = { "fin_pll", "fout_cpll" };
  67 PNAME(mpll_p)           = { "fin_pll", "fout_mpll", };
  68 PNAME(kpll_p)           = { "fin_pll", "fout_kpll", };
  69
  70 PNAME(mout_cpu_p)       = { "mout_apll", "sclk_mpll", };
  71 PNAME(mout_kfc_p)       = { "mout_kpll", "sclk_mpll", };
  72
  73 PNAME(mpll_user_p)      = { "fin_pll", "sclk_mpll", };
  74 PNAME(bpll_user_p)      = { "fin_pll", "sclk_bpll", };
  75 PNAME(mpll_bpll_p)      = { "sclk_mpll_muxed", "sclk_bpll_muxed", };
  76
  77 PNAME(group2_p)         = { "fin_pll", "fin_pll", "none", "none",
  78                         "none", "none", "sclk_mpll_bpll",
  79                          "none", "none", "sclk_cpll" };
  80
  81 static struct samsung_mux_clock exynos5410_mux_clks[] __initdata = {
  82         MUX(0, "mout_apll", apll_p, SRC_CPU, 0, 1),
  83         MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
  84
  85         MUX(0, "mout_kpll", kpll_p, SRC_KFC, 0, 1),
  86         MUX(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1),
  87
  88         MUX(0, "sclk_mpll", mpll_p, SRC_CPERI1, 8, 1),
  89         MUX(0, "sclk_mpll_muxed", mpll_user_p, SRC_TOP2, 20, 1),
  90
  91         MUX(0, "sclk_bpll", bpll_p, SRC_CDREX, 0, 1),
  92         MUX(0, "sclk_bpll_muxed", bpll_user_p, SRC_TOP2, 24, 1),
  93
  94         MUX(0, "sclk_cpll", cpll_p, SRC_TOP2, 8, 1),
  95
  96         MUX(0, "sclk_mpll_bpll", mpll_bpll_p, SRC_TOP1, 20, 1),
  97
  98         MUX(0, "mout_mmc0", group2_p, SRC_FSYS, 0, 4),
  99         MUX(0, "mout_mmc1", group2_p, SRC_FSYS, 4, 4),
 100         MUX(0, "mout_mmc2", group2_p, SRC_FSYS, 8, 4),
 101
 102         MUX(0, "mout_uart0", group2_p, SRC_PERIC0, 0, 4),
 103         MUX(0, "mout_uart1", group2_p, SRC_PERIC0, 4, 4),
 104         MUX(0, "mout_uart2", group2_p, SRC_PERIC0, 8, 4),
 105
 106         MUX(0, "mout_aclk200", mpll_bpll_p, SRC_TOP0, 12, 1),
 107         MUX(0, "mout_aclk400", mpll_bpll_p, SRC_TOP0, 20, 1),
 108 };
 109
 110 static struct samsung_div_clock exynos5410_div_clks[] __initdata = {
 111         DIV(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
 112         DIV(0, "div_arm2", "div_arm", DIV_CPU0, 28, 3),
 113
 114         DIV(0, "div_acp", "div_arm2", DIV_CPU0, 8, 3),
 115         DIV(0, "div_cpud", "div_arm2", DIV_CPU0, 4, 3),
 116         DIV(0, "div_atb", "div_arm2", DIV_CPU0, 16, 3),
 117         DIV(0, "pclk_dbg", "div_arm2", DIV_CPU0, 20, 3),
 118
 119         DIV(0, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3),
 120         DIV(0, "div_aclk", "div_kfc", DIV_KFC0, 4, 3),
 121         DIV(0, "div_pclk", "div_kfc", DIV_KFC0, 20, 3),
 122
 123         DIV(0, "aclk66_pre", "sclk_mpll_muxed", DIV_TOP1, 24, 3),
 124         DIV(0, "aclk66", "aclk66_pre", DIV_TOP0, 0, 3),
 125
 126         DIV(0, "div_mmc0", "mout_mmc0", DIV_FSYS1, 0, 4),
 127         DIV(0, "div_mmc1", "mout_mmc1", DIV_FSYS1, 16, 4),
 128         DIV(0, "div_mmc2", "mout_mmc2", DIV_FSYS2, 0, 4),
 129
 130         DIV_F(0, "div_mmc_pre0", "div_mmc0",
 131                         DIV_FSYS1, 8, 8, CLK_SET_RATE_PARENT, 0),
 132         DIV_F(0, "div_mmc_pre1", "div_mmc1",
 133                         DIV_FSYS1, 24, 8, CLK_SET_RATE_PARENT, 0),
 134         DIV_F(0, "div_mmc_pre2", "div_mmc2",
 135                         DIV_FSYS2, 8, 8, CLK_SET_RATE_PARENT, 0),
 136
 137         DIV(0, "div_uart0", "mout_uart0", DIV_PERIC0, 0, 4),
 138         DIV(0, "div_uart1", "mout_uart1", DIV_PERIC0, 4, 4),
 139         DIV(0, "div_uart2", "mout_uart2", DIV_PERIC0, 8, 4),
 140         DIV(0, "div_uart3", "mout_uart3", DIV_PERIC0, 12, 4),
 141
 142         DIV(0, "aclk200", "mout_aclk200", DIV_TOP0, 12, 3),
 143         DIV(0, "aclk400", "mout_aclk400", DIV_TOP0, 24, 3),
 144 };
 145
 146 static struct samsung_gate_clock exynos5410_gate_clks[] __initdata = {
 147         GATE(CLK_MCT, "mct", "aclk66", GATE_IP_PERIS, 18, 0, 0),
 148
 149         GATE(CLK_SCLK_MMC0, "sclk_mmc0", "div_mmc_pre0",
 150                         SRC_MASK_FSYS, 0, CLK_SET_RATE_PARENT, 0),
 151         GATE(CLK_SCLK_MMC1, "sclk_mmc1", "div_mmc_pre1",
 152                         SRC_MASK_FSYS, 4, CLK_SET_RATE_PARENT, 0),
 153         GATE(CLK_SCLK_MMC2, "sclk_mmc2", "div_mmc_pre2",
 154                         SRC_MASK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
 155
 156         GATE(CLK_MMC0, "sdmmc0", "aclk200", GATE_BUS_FSYS0, 12, 0, 0),
 157         GATE(CLK_MMC1, "sdmmc1", "aclk200", GATE_BUS_FSYS0, 13, 0, 0),
 158         GATE(CLK_MMC2, "sdmmc2", "aclk200", GATE_BUS_FSYS0, 14, 0, 0),
 159
 160         GATE(CLK_UART0, "uart0", "aclk66", GATE_IP_PERIC, 0, 0, 0),
 161         GATE(CLK_UART1, "uart1", "aclk66", GATE_IP_PERIC, 1, 0, 0),
 162         GATE(CLK_UART2, "uart2", "aclk66", GATE_IP_PERIC, 2, 0, 0),
 163
 164         GATE(CLK_SCLK_UART0, "sclk_uart0", "div_uart0",
 165                         SRC_MASK_PERIC0, 0, CLK_SET_RATE_PARENT, 0),
 166         GATE(CLK_SCLK_UART1, "sclk_uart1", "div_uart1",
 167                         SRC_MASK_PERIC0, 4, CLK_SET_RATE_PARENT, 0),
 168         GATE(CLK_SCLK_UART2, "sclk_uart2", "div_uart2",
 169                         SRC_MASK_PERIC0, 8, CLK_SET_RATE_PARENT, 0),
 170 };
 171
 172 static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
 173         [apll] = PLL(pll_35xx, CLK_FOUT_APLL, "fout_apll", "fin_pll", APLL_LOCK,
 174                 APLL_CON0, NULL),
 175         [cpll] = PLL(pll_35xx, CLK_FOUT_CPLL, "fout_cpll", "fin_pll", CPLL_LOCK,
 176                 CPLL_CON0, NULL),
 177         [mpll] = PLL(pll_35xx, CLK_FOUT_MPLL, "fout_mpll", "fin_pll", MPLL_LOCK,
 178                 MPLL_CON0, NULL),
 179         [bpll] = PLL(pll_35xx, CLK_FOUT_BPLL, "fout_bpll", "fin_pll", BPLL_LOCK,
 180                 BPLL_CON0, NULL),
 181         [kpll] = PLL(pll_35xx, CLK_FOUT_KPLL, "fout_kpll", "fin_pll", KPLL_LOCK,
 182                 KPLL_CON0, NULL),
 183 };
 184
 185 /* register exynos5410 clocks */
 186 static void __init exynos5410_clk_init(struct device_node *np)
 187 {
 188         struct samsung_clk_provider *ctx;
 189         void __iomem *reg_base;
 190
 191         reg_base = of_iomap(np, 0);
 192         if (!reg_base)
 193                 panic("%s: failed to map registers\n", __func__);
 194
 195         ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
 196
 197         samsung_clk_register_pll(ctx, exynos5410_plls,
 198                         ARRAY_SIZE(exynos5410_plls), reg_base);
 199
 200         samsung_clk_register_mux(ctx, exynos5410_mux_clks,
 201                         ARRAY_SIZE(exynos5410_mux_clks));
 202         samsung_clk_register_div(ctx, exynos5410_div_clks,
 203                         ARRAY_SIZE(exynos5410_div_clks));
 204         samsung_clk_register_gate(ctx, exynos5410_gate_clks,
 205                         ARRAY_SIZE(exynos5410_gate_clks));
 206
 207         samsung_clk_of_add_provider(np, ctx);
 208
 209         pr_debug("Exynos5410: clock setup completed.\n");
 210 }
 211 CLK_OF_DECLARE(exynos5410_clk, "samsung,exynos5410-clock", exynos5410_clk_init);