drivers/clk/renesas/r8a77970-cpg-mssr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * r8a77970 Clock Pulse Generator / Module Standby and Software Reset
   4  *
   5  * Copyright (C) 2017-2018 Cogent Embedded Inc.
   6  *
   7  * Based on r8a7795-cpg-mssr.c
   8  *
   9  * Copyright (C) 2015 Glider bvba
  10  */
  11
  12 #include <linux/clk-provider.h>
  13 #include <linux/device.h>
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/soc/renesas/rcar-rst.h>
  17
  18 #include <dt-bindings/clock/r8a77970-cpg-mssr.h>
  19
  20 #include "renesas-cpg-mssr.h"
  21 #include "rcar-gen3-cpg.h"
  22
  23 #define CPG_SD0CKCR             0x0074
  24
  25 enum r8a77970_clk_types {
  26         CLK_TYPE_R8A77970_SD0H = CLK_TYPE_GEN3_SOC_BASE,
  27         CLK_TYPE_R8A77970_SD0,
  28 };
  29
  30 enum clk_ids {
  31         /* Core Clock Outputs exported to DT */
  32         LAST_DT_CORE_CLK = R8A77970_CLK_OSC,
  33
  34         /* External Input Clocks */
  35         CLK_EXTAL,
  36         CLK_EXTALR,
  37
  38         /* Internal Core Clocks */
  39         CLK_MAIN,
  40         CLK_PLL0,
  41         CLK_PLL1,
  42         CLK_PLL3,
  43         CLK_PLL1_DIV2,
  44         CLK_PLL1_DIV4,
  45
  46         /* Module Clocks */
  47         MOD_CLK_BASE
  48 };
  49
  50 static spinlock_t cpg_lock;
  51
  52 static const struct clk_div_table cpg_sd0h_div_table[] = {
  53         {  0,  2 }, {  1,  3 }, {  2,  4 }, {  3,  6 },
  54         {  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
  55         {  8, 24 }, { 10, 36 }, { 11, 48 }, {  0,  0 },
  56 };
  57
  58 static const struct clk_div_table cpg_sd0_div_table[] = {
  59         {  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
  60         {  8, 24 }, { 10, 36 }, { 11, 48 }, { 12, 10 },
  61         {  0,  0 },
  62 };
  63
  64 static const struct cpg_core_clk r8a77970_core_clks[] __initconst = {
  65         /* External Clock Inputs */
  66         DEF_INPUT("extal",      CLK_EXTAL),
  67         DEF_INPUT("extalr",     CLK_EXTALR),
  68
  69         /* Internal Core Clocks */
  70         DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
  71         DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
  72         DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
  73         DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
  74
  75         DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,  CLK_PLL1,       2, 1),
  76         DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,  CLK_PLL1_DIV2,  2, 1),
  77
  78         /* Core Clock Outputs */
  79         DEF_FIXED("ztr",        R8A77970_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
  80         DEF_FIXED("ztrd2",      R8A77970_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
  81         DEF_FIXED("zt",         R8A77970_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
  82         DEF_FIXED("zx",         R8A77970_CLK_ZX,    CLK_PLL1_DIV2,  3, 1),
  83         DEF_FIXED("s1d1",       R8A77970_CLK_S1D1,  CLK_PLL1_DIV2,  4, 1),
  84         DEF_FIXED("s1d2",       R8A77970_CLK_S1D2,  CLK_PLL1_DIV2,  8, 1),
  85         DEF_FIXED("s1d4",       R8A77970_CLK_S1D4,  CLK_PLL1_DIV2, 16, 1),
  86         DEF_FIXED("s2d1",       R8A77970_CLK_S2D1,  CLK_PLL1_DIV2,  6, 1),
  87         DEF_FIXED("s2d2",       R8A77970_CLK_S2D2,  CLK_PLL1_DIV2, 12, 1),
  88         DEF_FIXED("s2d4",       R8A77970_CLK_S2D4,  CLK_PLL1_DIV2, 24, 1),
  89
  90         DEF_BASE("sd0h", R8A77970_CLK_SD0H, CLK_TYPE_R8A77970_SD0H,
  91                  CLK_PLL1_DIV2),
  92         DEF_BASE("sd0", R8A77970_CLK_SD0, CLK_TYPE_R8A77970_SD0, CLK_PLL1_DIV2),
  93
  94         DEF_FIXED("rpc",        R8A77970_CLK_RPC,   CLK_PLL1_DIV2,  5, 1),
  95         DEF_FIXED("rpcd2",      R8A77970_CLK_RPCD2, CLK_PLL1_DIV2, 10, 1),
  96
  97         DEF_FIXED("cl",         R8A77970_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
  98         DEF_FIXED("cp",         R8A77970_CLK_CP,    CLK_EXTAL,      2, 1),
  99         DEF_FIXED("cpex",       R8A77970_CLK_CPEX,  CLK_EXTAL,      2, 1),
 100
 101         DEF_DIV6P1("canfd",     R8A77970_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
 102         DEF_DIV6P1("mso",       R8A77970_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
 103         DEF_DIV6P1("csi0",      R8A77970_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
 104
 105         DEF_FIXED("osc",        R8A77970_CLK_OSC,   CLK_PLL1_DIV2, 12*1024, 1),
 106         DEF_FIXED("r",          R8A77970_CLK_R,     CLK_EXTALR,    1, 1),
 107 };
 108
 109 static const struct mssr_mod_clk r8a77970_mod_clks[] __initconst = {
 110         DEF_MOD("tmu4",                  121,   R8A77970_CLK_S2D2),
 111         DEF_MOD("tmu3",                  122,   R8A77970_CLK_S2D2),
 112         DEF_MOD("tmu2",                  123,   R8A77970_CLK_S2D2),
 113         DEF_MOD("tmu1",                  124,   R8A77970_CLK_S2D2),
 114         DEF_MOD("tmu0",                  125,   R8A77970_CLK_CP),
 115         DEF_MOD("ivcp1e",                127,   R8A77970_CLK_S2D1),
 116         DEF_MOD("scif4",                 203,   R8A77970_CLK_S2D4),
 117         DEF_MOD("scif3",                 204,   R8A77970_CLK_S2D4),
 118         DEF_MOD("scif1",                 206,   R8A77970_CLK_S2D4),
 119         DEF_MOD("scif0",                 207,   R8A77970_CLK_S2D4),
 120         DEF_MOD("msiof3",                208,   R8A77970_CLK_MSO),
 121         DEF_MOD("msiof2",                209,   R8A77970_CLK_MSO),
 122         DEF_MOD("msiof1",                210,   R8A77970_CLK_MSO),
 123         DEF_MOD("msiof0",                211,   R8A77970_CLK_MSO),
 124         DEF_MOD("mfis",                  213,   R8A77970_CLK_S2D2),
 125         DEF_MOD("sys-dmac2",             217,   R8A77970_CLK_S2D1),
 126         DEF_MOD("sys-dmac1",             218,   R8A77970_CLK_S2D1),
 127         DEF_MOD("cmt3",                  300,   R8A77970_CLK_R),
 128         DEF_MOD("cmt2",                  301,   R8A77970_CLK_R),
 129         DEF_MOD("cmt1",                  302,   R8A77970_CLK_R),
 130         DEF_MOD("cmt0",                  303,   R8A77970_CLK_R),
 131         DEF_MOD("tpu0",                  304,   R8A77970_CLK_S2D4),
 132         DEF_MOD("sd-if",                 314,   R8A77970_CLK_SD0),
 133         DEF_MOD("rwdt",                  402,   R8A77970_CLK_R),
 134         DEF_MOD("intc-ex",               407,   R8A77970_CLK_CP),
 135         DEF_MOD("intc-ap",               408,   R8A77970_CLK_S2D1),
 136         DEF_MOD("hscif3",                517,   R8A77970_CLK_S2D1),
 137         DEF_MOD("hscif2",                518,   R8A77970_CLK_S2D1),
 138         DEF_MOD("hscif1",                519,   R8A77970_CLK_S2D1),
 139         DEF_MOD("hscif0",                520,   R8A77970_CLK_S2D1),
 140         DEF_MOD("thermal",               522,   R8A77970_CLK_CP),
 141         DEF_MOD("pwm",                   523,   R8A77970_CLK_S2D4),
 142         DEF_MOD("fcpvd0",                603,   R8A77970_CLK_S2D1),
 143         DEF_MOD("vspd0",                 623,   R8A77970_CLK_S2D1),
 144         DEF_MOD("csi40",                 716,   R8A77970_CLK_CSI0),
 145         DEF_MOD("du0",                   724,   R8A77970_CLK_S2D1),
 146         DEF_MOD("lvds",                  727,   R8A77970_CLK_S2D1),
 147         DEF_MOD("vin3",                  808,   R8A77970_CLK_S2D1),
 148         DEF_MOD("vin2",                  809,   R8A77970_CLK_S2D1),
 149         DEF_MOD("vin1",                  810,   R8A77970_CLK_S2D1),
 150         DEF_MOD("vin0",                  811,   R8A77970_CLK_S2D1),
 151         DEF_MOD("etheravb",              812,   R8A77970_CLK_S2D2),
 152         DEF_MOD("gpio5",                 907,   R8A77970_CLK_CP),
 153         DEF_MOD("gpio4",                 908,   R8A77970_CLK_CP),
 154         DEF_MOD("gpio3",                 909,   R8A77970_CLK_CP),
 155         DEF_MOD("gpio2",                 910,   R8A77970_CLK_CP),
 156         DEF_MOD("gpio1",                 911,   R8A77970_CLK_CP),
 157         DEF_MOD("gpio0",                 912,   R8A77970_CLK_CP),
 158         DEF_MOD("can-fd",                914,   R8A77970_CLK_S2D2),
 159         DEF_MOD("rpc-if",                917,   R8A77970_CLK_RPC),
 160         DEF_MOD("i2c4",                  927,   R8A77970_CLK_S2D2),
 161         DEF_MOD("i2c3",                  928,   R8A77970_CLK_S2D2),
 162         DEF_MOD("i2c2",                  929,   R8A77970_CLK_S2D2),
 163         DEF_MOD("i2c1",                  930,   R8A77970_CLK_S2D2),
 164         DEF_MOD("i2c0",                  931,   R8A77970_CLK_S2D2),
 165 };
 166
 167 static const unsigned int r8a77970_crit_mod_clks[] __initconst = {
 168         MOD_CLK_ID(402),        /* RWDT */
 169         MOD_CLK_ID(408),        /* INTC-AP (GIC) */
 170 };
 171
 172 /*
 173  * CPG Clock Data
 174  */
 175
 176 /*
 177  *   MD         EXTAL           PLL0    PLL1    PLL3
 178  * 14 13 19     (MHz)
 179  *-------------------------------------------------
 180  * 0  0  0      16.66 x 1       x192    x192    x96
 181  * 0  0  1      16.66 x 1       x192    x192    x80
 182  * 0  1  0      20    x 1       x160    x160    x80
 183  * 0  1  1      20    x 1       x160    x160    x66
 184  * 1  0  0      27    / 2       x236    x236    x118
 185  * 1  0  1      27    / 2       x236    x236    x98
 186  * 1  1  0      33.33 / 2       x192    x192    x96
 187  * 1  1  1      33.33 / 2       x192    x192    x80
 188  */
 189 #define CPG_PLL_CONFIG_INDEX(md)        ((((md) & BIT(14)) >> 12) | \
 190                                          (((md) & BIT(13)) >> 12) | \
 191                                          (((md) & BIT(19)) >> 19))
 192
 193 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[8] __initconst = {
 194         /* EXTAL div    PLL1 mult/div   PLL3 mult/div */
 195         { 1,            192,    1,      96,     1,      },
 196         { 1,            192,    1,      80,     1,      },
 197         { 1,            160,    1,      80,     1,      },
 198         { 1,            160,    1,      66,     1,      },
 199         { 2,            236,    1,      118,    1,      },
 200         { 2,            236,    1,      98,     1,      },
 201         { 2,            192,    1,      96,     1,      },
 202         { 2,            192,    1,      80,     1,      },
 203 };
 204
 205 static int __init r8a77970_cpg_mssr_init(struct device *dev)
 206 {
 207         const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
 208         u32 cpg_mode;
 209         int error;
 210
 211         error = rcar_rst_read_mode_pins(&cpg_mode);
 212         if (error)
 213                 return error;
 214
 215         spin_lock_init(&cpg_lock);
 216
 217         cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
 218
 219         return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
 220 }
 221
 222 static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
 223         const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
 224         struct clk **clks, void __iomem *base,
 225         struct raw_notifier_head *notifiers)
 226 {
 227         const struct clk_div_table *table;
 228         const struct clk *parent;
 229         unsigned int shift;
 230
 231         switch (core->type) {
 232         case CLK_TYPE_R8A77970_SD0H:
 233                 table = cpg_sd0h_div_table;
 234                 shift = 8;
 235                 break;
 236         case CLK_TYPE_R8A77970_SD0:
 237                 table = cpg_sd0_div_table;
 238                 shift = 4;
 239                 break;
 240         default:
 241                 return rcar_gen3_cpg_clk_register(dev, core, info, clks, base,
 242                                                   notifiers);
 243         }
 244
 245         parent = clks[core->parent];
 246         if (IS_ERR(parent))
 247                 return ERR_CAST(parent);
 248
 249         return clk_register_divider_table(NULL, core->name,
 250                                           __clk_get_name(parent), 0,
 251                                           base + CPG_SD0CKCR,
 252                                           shift, 4, 0, table, &cpg_lock);
 253 }
 254
 255 const struct cpg_mssr_info r8a77970_cpg_mssr_info __initconst = {
 256         /* Core Clocks */
 257         .core_clks = r8a77970_core_clks,
 258         .num_core_clks = ARRAY_SIZE(r8a77970_core_clks),
 259         .last_dt_core_clk = LAST_DT_CORE_CLK,
 260         .num_total_core_clks = MOD_CLK_BASE,
 261
 262         /* Module Clocks */
 263         .mod_clks = r8a77970_mod_clks,
 264         .num_mod_clks = ARRAY_SIZE(r8a77970_mod_clks),
 265         .num_hw_mod_clks = 12 * 32,
 266
 267         /* Critical Module Clocks */
 268         .crit_mod_clks = r8a77970_crit_mod_clks,
 269         .num_crit_mod_clks = ARRAY_SIZE(r8a77970_crit_mod_clks),
 270
 271         /* Callbacks */
 272         .init = r8a77970_cpg_mssr_init,
 273         .cpg_clk_register = r8a77970_cpg_clk_register,
 274 };