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-provider.h>
  15 #include <linux/of.h>
  16 #include <linux/of_address.h>
  17 #include <linux/clk.h>
  18
  19 #include "clk.h"
  20
  21 #define APLL_LOCK               0x0
  22 #define APLL_CON0               0x100
  23 #define CPLL_LOCK               0x10020
  24 #define CPLL_CON0               0x10120
  25 #define EPLL_LOCK               0x10040
  26 #define EPLL_CON0               0x10130
  27 #define MPLL_LOCK               0x4000
  28 #define MPLL_CON0               0x4100
  29 #define BPLL_LOCK               0x20010
  30 #define BPLL_CON0               0x20110
  31 #define KPLL_LOCK               0x28000
  32 #define KPLL_CON0               0x28100
  33
  34 #define SRC_CPU                 0x200
  35 #define DIV_CPU0                0x500
  36 #define SRC_CPERI1              0x4204
  37 #define GATE_IP_G2D             0x8800
  38 #define DIV_TOP0                0x10510
  39 #define DIV_TOP1                0x10514
  40 #define DIV_FSYS0               0x10548
  41 #define DIV_FSYS1               0x1054c
  42 #define DIV_FSYS2               0x10550
  43 #define DIV_PERIC0              0x10558
  44 #define DIV_PERIC3              0x10564
  45 #define SRC_TOP0                0x10210
  46 #define SRC_TOP1                0x10214
  47 #define SRC_TOP2                0x10218
  48 #define SRC_FSYS                0x10244
  49 #define SRC_PERIC0              0x10250
  50 #define SRC_MASK_FSYS           0x10340
  51 #define SRC_MASK_PERIC0         0x10350
  52 #define GATE_BUS_FSYS0          0x10740
  53 #define GATE_TOP_SCLK_FSYS      0x10840
  54 #define GATE_TOP_SCLK_PERIC     0x10850
  55 #define GATE_IP_FSYS            0x10944
  56 #define GATE_IP_PERIC           0x10950
  57 #define GATE_IP_PERIS           0x10960
  58 #define SRC_CDREX               0x20200
  59 #define SRC_KFC                 0x28200
  60 #define DIV_KFC0                0x28500
  61
  62 /* list of PLLs */
  63 enum exynos5410_plls {
  64         apll, cpll, epll, mpll,
  65         bpll, kpll,
  66         nr_plls                 /* number of PLLs */
  67 };
  68
  69 /* list of all parent clocks */
  70 PNAME(apll_p)           = { "fin_pll", "fout_apll", };
  71 PNAME(bpll_p)           = { "fin_pll", "fout_bpll", };
  72 PNAME(cpll_p)           = { "fin_pll", "fout_cpll" };
  73 PNAME(epll_p)           = { "fin_pll", "fout_epll" };
  74 PNAME(mpll_p)           = { "fin_pll", "fout_mpll", };
  75 PNAME(kpll_p)           = { "fin_pll", "fout_kpll", };
  76
  77 PNAME(mout_cpu_p)       = { "mout_apll", "sclk_mpll", };
  78 PNAME(mout_kfc_p)       = { "mout_kpll", "sclk_mpll", };
  79
  80 PNAME(mpll_user_p)      = { "fin_pll", "sclk_mpll", };
  81 PNAME(bpll_user_p)      = { "fin_pll", "sclk_bpll", };
  82 PNAME(mpll_bpll_p)      = { "sclk_mpll_muxed", "sclk_bpll_muxed", };
  83 PNAME(sclk_mpll_bpll_p) = { "sclk_mpll_bpll", "fin_pll", };
  84
  85 PNAME(group2_p)         = { "fin_pll", "fin_pll", "none", "none",
  86                         "none", "none", "sclk_mpll_bpll",
  87                          "none", "none", "sclk_cpll" };
  88
  89 static const struct samsung_mux_clock exynos5410_mux_clks[] __initconst = {
  90         MUX(0, "mout_apll", apll_p, SRC_CPU, 0, 1),
  91         MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
  92
  93         MUX(0, "mout_kpll", kpll_p, SRC_KFC, 0, 1),
  94         MUX(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1),
  95
  96         MUX(0, "sclk_mpll", mpll_p, SRC_CPERI1, 8, 1),
  97         MUX(0, "sclk_mpll_muxed", mpll_user_p, SRC_TOP2, 20, 1),
  98
  99         MUX(0, "sclk_bpll", bpll_p, SRC_CDREX, 0, 1),
 100         MUX(0, "sclk_bpll_muxed", bpll_user_p, SRC_TOP2, 24, 1),
 101
 102         MUX(0, "sclk_epll", epll_p, SRC_TOP2, 12, 1),
 103
 104         MUX(0, "sclk_cpll", cpll_p, SRC_TOP2, 8, 1),
 105
 106         MUX(0, "sclk_mpll_bpll", mpll_bpll_p, SRC_TOP1, 20, 1),
 107
 108         MUX(0, "mout_mmc0", group2_p, SRC_FSYS, 0, 4),
 109         MUX(0, "mout_mmc1", group2_p, SRC_FSYS, 4, 4),
 110         MUX(0, "mout_mmc2", group2_p, SRC_FSYS, 8, 4),
 111         MUX(0, "mout_usbd300", sclk_mpll_bpll_p, SRC_FSYS, 28, 1),
 112         MUX(0, "mout_usbd301", sclk_mpll_bpll_p, SRC_FSYS, 29, 1),
 113
 114         MUX(0, "mout_uart0", group2_p, SRC_PERIC0, 0, 4),
 115         MUX(0, "mout_uart1", group2_p, SRC_PERIC0, 4, 4),
 116         MUX(0, "mout_uart2", group2_p, SRC_PERIC0, 8, 4),
 117         MUX(0, "mout_uart3", group2_p, SRC_PERIC0, 12, 4),
 118         MUX(0, "mout_pwm", group2_p, SRC_PERIC0, 24, 4),
 119
 120         MUX(0, "mout_aclk200", mpll_bpll_p, SRC_TOP0, 12, 1),
 121         MUX(0, "mout_aclk400", mpll_bpll_p, SRC_TOP0, 20, 1),
 122 };
 123
 124 static const struct samsung_div_clock exynos5410_div_clks[] __initconst = {
 125         DIV(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
 126         DIV(0, "div_arm2", "div_arm", DIV_CPU0, 28, 3),
 127
 128         DIV(0, "div_acp", "div_arm2", DIV_CPU0, 8, 3),
 129         DIV(0, "div_cpud", "div_arm2", DIV_CPU0, 4, 3),
 130         DIV(0, "div_atb", "div_arm2", DIV_CPU0, 16, 3),
 131         DIV(0, "pclk_dbg", "div_arm2", DIV_CPU0, 20, 3),
 132
 133         DIV(0, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3),
 134         DIV(0, "div_aclk", "div_kfc", DIV_KFC0, 4, 3),
 135         DIV(0, "div_pclk", "div_kfc", DIV_KFC0, 20, 3),
 136
 137         DIV(0, "aclk66_pre", "sclk_mpll_muxed", DIV_TOP1, 24, 3),
 138         DIV(0, "aclk66", "aclk66_pre", DIV_TOP0, 0, 3),
 139
 140         DIV(0, "dout_usbphy300", "mout_usbd300", DIV_FSYS0, 16, 4),
 141         DIV(0, "dout_usbphy301", "mout_usbd301", DIV_FSYS0, 20, 4),
 142         DIV(0, "dout_usbd300", "mout_usbd300", DIV_FSYS0, 24, 4),
 143         DIV(0, "dout_usbd301", "mout_usbd301", DIV_FSYS0, 28, 4),
 144
 145         DIV(0, "div_mmc0", "mout_mmc0", DIV_FSYS1, 0, 4),
 146         DIV(0, "div_mmc1", "mout_mmc1", DIV_FSYS1, 16, 4),
 147         DIV(0, "div_mmc2", "mout_mmc2", DIV_FSYS2, 0, 4),
 148
 149         DIV_F(0, "div_mmc_pre0", "div_mmc0",
 150                         DIV_FSYS1, 8, 8, CLK_SET_RATE_PARENT, 0),
 151         DIV_F(0, "div_mmc_pre1", "div_mmc1",
 152                         DIV_FSYS1, 24, 8, CLK_SET_RATE_PARENT, 0),
 153         DIV_F(0, "div_mmc_pre2", "div_mmc2",
 154                         DIV_FSYS2, 8, 8, CLK_SET_RATE_PARENT, 0),
 155
 156         DIV(0, "div_uart0", "mout_uart0", DIV_PERIC0, 0, 4),
 157         DIV(0, "div_uart1", "mout_uart1", DIV_PERIC0, 4, 4),
 158         DIV(0, "div_uart2", "mout_uart2", DIV_PERIC0, 8, 4),
 159         DIV(0, "div_uart3", "mout_uart3", DIV_PERIC0, 12, 4),
 160
 161         DIV(0, "dout_pwm", "mout_pwm", DIV_PERIC3, 0, 4),
 162
 163         DIV(0, "aclk200", "mout_aclk200", DIV_TOP0, 12, 3),
 164         DIV(0, "aclk266", "mpll_user_p", DIV_TOP0, 16, 3),
 165         DIV(0, "aclk400", "mout_aclk400", DIV_TOP0, 24, 3),
 166 };
 167
 168 static const struct samsung_gate_clock exynos5410_gate_clks[] __initconst = {
 169         GATE(CLK_SSS, "sss", "aclk266", GATE_IP_G2D, 2, 0, 0),
 170         GATE(CLK_MCT, "mct", "aclk66", GATE_IP_PERIS, 18, 0, 0),
 171         GATE(CLK_WDT, "wdt", "aclk66", GATE_IP_PERIS, 19, 0, 0),
 172         GATE(CLK_RTC, "rtc", "aclk66", GATE_IP_PERIS, 20, 0, 0),
 173         GATE(CLK_TMU, "tmu", "aclk66", GATE_IP_PERIS, 21, 0, 0),
 174
 175         GATE(CLK_SCLK_MMC0, "sclk_mmc0", "div_mmc_pre0",
 176                         SRC_MASK_FSYS, 0, CLK_SET_RATE_PARENT, 0),
 177         GATE(CLK_SCLK_MMC1, "sclk_mmc1", "div_mmc_pre1",
 178                         SRC_MASK_FSYS, 4, CLK_SET_RATE_PARENT, 0),
 179         GATE(CLK_SCLK_MMC2, "sclk_mmc2", "div_mmc_pre2",
 180                         SRC_MASK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
 181
 182         GATE(CLK_MMC0, "sdmmc0", "aclk200", GATE_BUS_FSYS0, 12, 0, 0),
 183         GATE(CLK_MMC1, "sdmmc1", "aclk200", GATE_BUS_FSYS0, 13, 0, 0),
 184         GATE(CLK_MMC2, "sdmmc2", "aclk200", GATE_BUS_FSYS0, 14, 0, 0),
 185         GATE(CLK_PDMA1, "pdma1", "aclk200", GATE_BUS_FSYS0, 2, 0, 0),
 186         GATE(CLK_PDMA0, "pdma0", "aclk200", GATE_BUS_FSYS0, 1, 0, 0),
 187
 188         GATE(CLK_SCLK_USBPHY301, "sclk_usbphy301", "dout_usbphy301",
 189              GATE_TOP_SCLK_FSYS, 7, CLK_SET_RATE_PARENT, 0),
 190         GATE(CLK_SCLK_USBPHY300, "sclk_usbphy300", "dout_usbphy300",
 191              GATE_TOP_SCLK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
 192         GATE(CLK_SCLK_USBD300, "sclk_usbd300", "dout_usbd300",
 193              GATE_TOP_SCLK_FSYS, 9, CLK_SET_RATE_PARENT, 0),
 194         GATE(CLK_SCLK_USBD301, "sclk_usbd301", "dout_usbd301",
 195              GATE_TOP_SCLK_FSYS, 10, CLK_SET_RATE_PARENT, 0),
 196
 197         GATE(CLK_SCLK_PWM, "sclk_pwm", "dout_pwm",
 198              GATE_TOP_SCLK_PERIC, 11, CLK_SET_RATE_PARENT, 0),
 199
 200         GATE(CLK_UART0, "uart0", "aclk66", GATE_IP_PERIC, 0, 0, 0),
 201         GATE(CLK_UART1, "uart1", "aclk66", GATE_IP_PERIC, 1, 0, 0),
 202         GATE(CLK_UART2, "uart2", "aclk66", GATE_IP_PERIC, 2, 0, 0),
 203         GATE(CLK_UART3, "uart3", "aclk66", GATE_IP_PERIC, 3, 0, 0),
 204         GATE(CLK_I2C0, "i2c0", "aclk66", GATE_IP_PERIC, 6, 0, 0),
 205         GATE(CLK_I2C1, "i2c1", "aclk66", GATE_IP_PERIC, 7, 0, 0),
 206         GATE(CLK_I2C2, "i2c2", "aclk66", GATE_IP_PERIC, 8, 0, 0),
 207         GATE(CLK_I2C3, "i2c3", "aclk66", GATE_IP_PERIC, 9, 0, 0),
 208         GATE(CLK_USI0, "usi0", "aclk66", GATE_IP_PERIC, 10, 0, 0),
 209         GATE(CLK_USI1, "usi1", "aclk66", GATE_IP_PERIC, 11, 0, 0),
 210         GATE(CLK_USI2, "usi2", "aclk66", GATE_IP_PERIC, 12, 0, 0),
 211         GATE(CLK_USI3, "usi3", "aclk66", GATE_IP_PERIC, 13, 0, 0),
 212         GATE(CLK_PWM, "pwm", "aclk66", GATE_IP_PERIC, 24, 0, 0),
 213
 214         GATE(CLK_SCLK_UART0, "sclk_uart0", "div_uart0",
 215                         SRC_MASK_PERIC0, 0, CLK_SET_RATE_PARENT, 0),
 216         GATE(CLK_SCLK_UART1, "sclk_uart1", "div_uart1",
 217                         SRC_MASK_PERIC0, 4, CLK_SET_RATE_PARENT, 0),
 218         GATE(CLK_SCLK_UART2, "sclk_uart2", "div_uart2",
 219                         SRC_MASK_PERIC0, 8, CLK_SET_RATE_PARENT, 0),
 220         GATE(CLK_SCLK_UART3, "sclk_uart3", "div_uart3",
 221                         SRC_MASK_PERIC0, 12, CLK_SET_RATE_PARENT, 0),
 222
 223         GATE(CLK_USBH20, "usbh20", "aclk200_fsys", GATE_IP_FSYS, 18, 0, 0),
 224         GATE(CLK_USBD300, "usbd300", "aclk200_fsys", GATE_IP_FSYS, 19, 0, 0),
 225         GATE(CLK_USBD301, "usbd301", "aclk200_fsys", GATE_IP_FSYS, 20, 0, 0),
 226 };
 227
 228 static const struct samsung_pll_rate_table exynos5410_pll2550x_24mhz_tbl[] __initconst = {
 229         PLL_36XX_RATE(24 * MHZ, 400000000U, 200, 3, 2, 0),
 230         PLL_36XX_RATE(24 * MHZ, 333000000U, 111, 2, 2, 0),
 231         PLL_36XX_RATE(24 * MHZ, 300000000U, 100, 2, 2, 0),
 232         PLL_36XX_RATE(24 * MHZ, 266000000U, 266, 3, 3, 0),
 233         PLL_36XX_RATE(24 * MHZ, 200000000U, 200, 3, 3, 0),
 234         PLL_36XX_RATE(24 * MHZ, 192000000U, 192, 3, 3, 0),
 235         PLL_36XX_RATE(24 * MHZ, 166000000U, 166, 3, 3, 0),
 236         PLL_36XX_RATE(24 * MHZ, 133000000U, 266, 3, 4, 0),
 237         PLL_36XX_RATE(24 * MHZ, 100000000U, 200, 3, 4, 0),
 238         PLL_36XX_RATE(24 * MHZ, 66000000U,  176, 2, 5, 0),
 239 };
 240
 241 static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
 242         [apll] = PLL(pll_35xx, CLK_FOUT_APLL, "fout_apll", "fin_pll", APLL_LOCK,
 243                 APLL_CON0, NULL),
 244         [cpll] = PLL(pll_35xx, CLK_FOUT_CPLL, "fout_cpll", "fin_pll", CPLL_LOCK,
 245                 CPLL_CON0, NULL),
 246         [epll] = PLL(pll_2650x, CLK_FOUT_EPLL, "fout_epll", "fin_pll", EPLL_LOCK,
 247                 EPLL_CON0, NULL),
 248         [mpll] = PLL(pll_35xx, CLK_FOUT_MPLL, "fout_mpll", "fin_pll", MPLL_LOCK,
 249                 MPLL_CON0, NULL),
 250         [bpll] = PLL(pll_35xx, CLK_FOUT_BPLL, "fout_bpll", "fin_pll", BPLL_LOCK,
 251                 BPLL_CON0, NULL),
 252         [kpll] = PLL(pll_35xx, CLK_FOUT_KPLL, "fout_kpll", "fin_pll", KPLL_LOCK,
 253                 KPLL_CON0, NULL),
 254 };
 255
 256 static const struct samsung_cmu_info cmu __initconst = {
 257         .pll_clks       = exynos5410_plls,
 258         .nr_pll_clks    = ARRAY_SIZE(exynos5410_plls),
 259         .mux_clks       = exynos5410_mux_clks,
 260         .nr_mux_clks    = ARRAY_SIZE(exynos5410_mux_clks),
 261         .div_clks       = exynos5410_div_clks,
 262         .nr_div_clks    = ARRAY_SIZE(exynos5410_div_clks),
 263         .gate_clks      = exynos5410_gate_clks,
 264         .nr_gate_clks   = ARRAY_SIZE(exynos5410_gate_clks),
 265         .nr_clk_ids     = CLK_NR_CLKS,
 266 };
 267
 268 /* register exynos5410 clocks */
 269 static void __init exynos5410_clk_init(struct device_node *np)
 270 {
 271         struct clk *xxti = of_clk_get(np, 0);
 272
 273         if (!IS_ERR(xxti) && clk_get_rate(xxti) == 24 * MHZ)
 274                 exynos5410_plls[epll].rate_table = exynos5410_pll2550x_24mhz_tbl;
 275
 276         samsung_cmu_register_one(np, &cmu);
 277
 278         pr_debug("Exynos5410: clock setup completed.\n");
 279 }
 280 CLK_OF_DECLARE(exynos5410_clk, "samsung,exynos5410-clock", exynos5410_clk_init);