1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Renesas Clock Pulse Generator / Module Standby and Software Reset 4 * 5 * Copyright (C) 2015 Glider bvba 6 */ 7 8 #ifndef __CLK_RENESAS_CPG_MSSR_H__ 9 #define __CLK_RENESAS_CPG_MSSR_H__ 10 11 /* 12 * Definitions of CPG Core Clocks 13 * 14 * These include: 15 * - Clock outputs exported to DT 16 * - External input clocks 17 * - Internal CPG clocks 18 */ 19 20 struct cpg_core_clk { 21 /* Common */ 22 const char *name; 23 unsigned int id; 24 unsigned int type; 25 /* Depending on type */ 26 unsigned int parent; /* Core Clocks only */ 27 unsigned int div; 28 unsigned int mult; 29 unsigned int offset; 30 }; 31 32 enum clk_types { 33 /* Generic */ 34 CLK_TYPE_IN, /* External Clock Input */ 35 CLK_TYPE_FF, /* Fixed Factor Clock */ 36 CLK_TYPE_DIV6P1, /* DIV6 Clock with 1 parent clock */ 37 CLK_TYPE_DIV6_RO, /* DIV6 Clock read only with extra divisor */ 38 CLK_TYPE_FR, /* Fixed Rate Clock */ 39 40 /* Custom definitions start here */ 41 CLK_TYPE_CUSTOM, 42 }; 43 44 #define DEF_TYPE(_name, _id, _type...) \ 45 { .name = _name, .id = _id, .type = _type } 46 #define DEF_BASE(_name, _id, _type, _parent...) \ 47 DEF_TYPE(_name, _id, _type, .parent = _parent) 48 49 #define DEF_INPUT(_name, _id) \ 50 DEF_TYPE(_name, _id, CLK_TYPE_IN) 51 #define DEF_FIXED(_name, _id, _parent, _div, _mult) \ 52 DEF_BASE(_name, _id, CLK_TYPE_FF, _parent, .div = _div, .mult = _mult) 53 #define DEF_DIV6P1(_name, _id, _parent, _offset) \ 54 DEF_BASE(_name, _id, CLK_TYPE_DIV6P1, _parent, .offset = _offset) 55 #define DEF_DIV6_RO(_name, _id, _parent, _offset, _div) \ 56 DEF_BASE(_name, _id, CLK_TYPE_DIV6_RO, _parent, .offset = _offset, .div = _div, .mult = 1) 57 #define DEF_RATE(_name, _id, _rate) \ 58 DEF_TYPE(_name, _id, CLK_TYPE_FR, .mult = _rate) 59 60 /* 61 * Definitions of Module Clocks 62 */ 63 64 struct mssr_mod_clk { 65 const char *name; 66 unsigned int id; 67 unsigned int parent; /* Add MOD_CLK_BASE for Module Clocks */ 68 }; 69 70 /* Convert from sparse base-100 to packed index space */ 71 #define MOD_CLK_PACK(x) ((x) - ((x) / 100) * (100 - 32)) 72 73 #define MOD_CLK_ID(x) (MOD_CLK_BASE + MOD_CLK_PACK(x)) 74 75 #define DEF_MOD(_name, _mod, _parent...) \ 76 { .name = _name, .id = MOD_CLK_ID(_mod), .parent = _parent } 77 78 /* Convert from sparse base-10 to packed index space */ 79 #define MOD_CLK_PACK_10(x) ((x / 10) * 32 + (x % 10)) 80 81 #define MOD_CLK_ID_10(x) (MOD_CLK_BASE + MOD_CLK_PACK_10(x)) 82 83 #define DEF_MOD_STB(_name, _mod, _parent...) \ 84 { .name = _name, .id = MOD_CLK_ID_10(_mod), .parent = _parent } 85 86 struct device_node; 87 88 /** 89 * SoC-specific CPG/MSSR Description 90 * 91 * @early_core_clks: Array of Early Core Clock definitions 92 * @num_early_core_clks: Number of entries in early_core_clks[] 93 * @early_mod_clks: Array of Early Module Clock definitions 94 * @num_early_mod_clks: Number of entries in early_mod_clks[] 95 * 96 * @core_clks: Array of Core Clock definitions 97 * @num_core_clks: Number of entries in core_clks[] 98 * @last_dt_core_clk: ID of the last Core Clock exported to DT 99 * @num_total_core_clks: Total number of Core Clocks (exported + internal) 100 * 101 * @mod_clks: Array of Module Clock definitions 102 * @num_mod_clks: Number of entries in mod_clks[] 103 * @num_hw_mod_clks: Number of Module Clocks supported by the hardware 104 * 105 * @crit_mod_clks: Array with Module Clock IDs of critical clocks that 106 * should not be disabled without a knowledgeable driver 107 * @num_crit_mod_clks: Number of entries in crit_mod_clks[] 108 * 109 * @core_pm_clks: Array with IDs of Core Clocks that are suitable for Power 110 * Management, in addition to Module Clocks 111 * @num_core_pm_clks: Number of entries in core_pm_clks[] 112 * 113 * @init: Optional callback to perform SoC-specific initialization 114 * @cpg_clk_register: Optional callback to handle special Core Clock types 115 * 116 * @stbyctrl: This device has Standby Control Registers which are 8-bits 117 * wide, no status registers (MSTPSR) and have different address 118 * offsets. 119 */ 120 121 struct cpg_mssr_info { 122 /* Early Clocks */ 123 const struct cpg_core_clk *early_core_clks; 124 unsigned int num_early_core_clks; 125 const struct mssr_mod_clk *early_mod_clks; 126 unsigned int num_early_mod_clks; 127 128 /* Core Clocks */ 129 const struct cpg_core_clk *core_clks; 130 unsigned int num_core_clks; 131 unsigned int last_dt_core_clk; 132 unsigned int num_total_core_clks; 133 bool stbyctrl; 134 135 /* Module Clocks */ 136 const struct mssr_mod_clk *mod_clks; 137 unsigned int num_mod_clks; 138 unsigned int num_hw_mod_clks; 139 140 /* Critical Module Clocks that should not be disabled */ 141 const unsigned int *crit_mod_clks; 142 unsigned int num_crit_mod_clks; 143 144 /* Core Clocks suitable for PM, in addition to the Module Clocks */ 145 const unsigned int *core_pm_clks; 146 unsigned int num_core_pm_clks; 147 148 /* Callbacks */ 149 int (*init)(struct device *dev); 150 struct clk *(*cpg_clk_register)(struct device *dev, 151 const struct cpg_core_clk *core, 152 const struct cpg_mssr_info *info, 153 struct clk **clks, void __iomem *base, 154 struct raw_notifier_head *notifiers); 155 }; 156 157 extern const struct cpg_mssr_info r7s9210_cpg_mssr_info; 158 extern const struct cpg_mssr_info r8a7742_cpg_mssr_info; 159 extern const struct cpg_mssr_info r8a7743_cpg_mssr_info; 160 extern const struct cpg_mssr_info r8a7745_cpg_mssr_info; 161 extern const struct cpg_mssr_info r8a77470_cpg_mssr_info; 162 extern const struct cpg_mssr_info r8a774a1_cpg_mssr_info; 163 extern const struct cpg_mssr_info r8a774b1_cpg_mssr_info; 164 extern const struct cpg_mssr_info r8a774c0_cpg_mssr_info; 165 extern const struct cpg_mssr_info r8a774e1_cpg_mssr_info; 166 extern const struct cpg_mssr_info r8a7790_cpg_mssr_info; 167 extern const struct cpg_mssr_info r8a7791_cpg_mssr_info; 168 extern const struct cpg_mssr_info r8a7792_cpg_mssr_info; 169 extern const struct cpg_mssr_info r8a7794_cpg_mssr_info; 170 extern const struct cpg_mssr_info r8a7795_cpg_mssr_info; 171 extern const struct cpg_mssr_info r8a7796_cpg_mssr_info; 172 extern const struct cpg_mssr_info r8a77965_cpg_mssr_info; 173 extern const struct cpg_mssr_info r8a77970_cpg_mssr_info; 174 extern const struct cpg_mssr_info r8a77980_cpg_mssr_info; 175 extern const struct cpg_mssr_info r8a77990_cpg_mssr_info; 176 extern const struct cpg_mssr_info r8a77995_cpg_mssr_info; 177 178 void __init cpg_mssr_early_init(struct device_node *np, 179 const struct cpg_mssr_info *info); 180 181 /* 182 * Helpers for fixing up clock tables depending on SoC revision 183 */ 184 185 struct mssr_mod_reparent { 186 unsigned int clk, parent; 187 }; 188 189 190 extern void cpg_core_nullify_range(struct cpg_core_clk *core_clks, 191 unsigned int num_core_clks, 192 unsigned int first_clk, 193 unsigned int last_clk); 194 extern void mssr_mod_nullify(struct mssr_mod_clk *mod_clks, 195 unsigned int num_mod_clks, 196 const unsigned int *clks, unsigned int n); 197 extern void mssr_mod_reparent(struct mssr_mod_clk *mod_clks, 198 unsigned int num_mod_clks, 199 const struct mssr_mod_reparent *clks, 200 unsigned int n); 201 #endif 202