1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2014 MediaTek Inc. 4 * Author: James Liao <jamesjj.liao@mediatek.com> 5 */ 6 7 #ifndef __DRV_CLK_MTK_H 8 #define __DRV_CLK_MTK_H 9 10 #include <linux/clk-provider.h> 11 #include <linux/io.h> 12 #include <linux/kernel.h> 13 #include <linux/spinlock.h> 14 #include <linux/types.h> 15 16 #include "reset.h" 17 18 #define MAX_MUX_GATE_BIT 31 19 #define INVALID_MUX_GATE_BIT (MAX_MUX_GATE_BIT + 1) 20 21 #define MHZ (1000 * 1000) 22 23 struct platform_device; 24 25 /* 26 * We need the clock IDs to start from zero but to maintain devicetree 27 * backwards compatibility we can't change bindings to start from zero. 28 * Only a few platforms are affected, so we solve issues given by the 29 * commonized MTK clocks probe function(s) by adding a dummy clock at 30 * the beginning where needed. 31 */ 32 #define CLK_DUMMY 0 33 34 extern const struct clk_ops mtk_clk_dummy_ops; 35 extern const struct mtk_gate_regs cg_regs_dummy; 36 37 #define GATE_DUMMY(_id, _name) { \ 38 .id = _id, \ 39 .name = _name, \ 40 .regs = &cg_regs_dummy, \ 41 .ops = &mtk_clk_dummy_ops, \ 42 } 43 44 struct mtk_fixed_clk { 45 int id; 46 const char *name; 47 const char *parent; 48 unsigned long rate; 49 }; 50 51 #define FIXED_CLK(_id, _name, _parent, _rate) { \ 52 .id = _id, \ 53 .name = _name, \ 54 .parent = _parent, \ 55 .rate = _rate, \ 56 } 57 58 int mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num, 59 struct clk_hw_onecell_data *clk_data); 60 void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num, 61 struct clk_hw_onecell_data *clk_data); 62 63 struct mtk_fixed_factor { 64 int id; 65 const char *name; 66 const char *parent_name; 67 int mult; 68 int div; 69 unsigned long flags; 70 }; 71 72 #define FACTOR_FLAGS(_id, _name, _parent, _mult, _div, _fl) { \ 73 .id = _id, \ 74 .name = _name, \ 75 .parent_name = _parent, \ 76 .mult = _mult, \ 77 .div = _div, \ 78 .flags = _fl, \ 79 } 80 81 #define FACTOR(_id, _name, _parent, _mult, _div) \ 82 FACTOR_FLAGS(_id, _name, _parent, _mult, _div, CLK_SET_RATE_PARENT) 83 84 int mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num, 85 struct clk_hw_onecell_data *clk_data); 86 void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num, 87 struct clk_hw_onecell_data *clk_data); 88 89 struct mtk_composite { 90 int id; 91 const char *name; 92 const char * const *parent_names; 93 const char *parent; 94 unsigned flags; 95 96 uint32_t mux_reg; 97 uint32_t divider_reg; 98 uint32_t gate_reg; 99 100 signed char mux_shift; 101 signed char mux_width; 102 signed char gate_shift; 103 104 signed char divider_shift; 105 signed char divider_width; 106 107 u8 mux_flags; 108 109 signed char num_parents; 110 }; 111 112 #define MUX_GATE_FLAGS_2(_id, _name, _parents, _reg, _shift, \ 113 _width, _gate, _flags, _muxflags) { \ 114 .id = _id, \ 115 .name = _name, \ 116 .mux_reg = _reg, \ 117 .mux_shift = _shift, \ 118 .mux_width = _width, \ 119 .gate_reg = _reg, \ 120 .gate_shift = _gate, \ 121 .divider_shift = -1, \ 122 .parent_names = _parents, \ 123 .num_parents = ARRAY_SIZE(_parents), \ 124 .flags = _flags, \ 125 .mux_flags = _muxflags, \ 126 } 127 128 /* 129 * In case the rate change propagation to parent clocks is undesirable, 130 * this macro allows to specify the clock flags manually. 131 */ 132 #define MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, \ 133 _gate, _flags) \ 134 MUX_GATE_FLAGS_2(_id, _name, _parents, _reg, \ 135 _shift, _width, _gate, _flags, 0) 136 137 /* 138 * Unless necessary, all MUX_GATE clocks propagate rate changes to their 139 * parent clock by default. 140 */ 141 #define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) \ 142 MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, \ 143 _gate, CLK_SET_RATE_PARENT) 144 145 #define MUX(_id, _name, _parents, _reg, _shift, _width) \ 146 MUX_FLAGS(_id, _name, _parents, _reg, \ 147 _shift, _width, CLK_SET_RATE_PARENT) 148 149 #define MUX_FLAGS(_id, _name, _parents, _reg, _shift, _width, _flags) { \ 150 .id = _id, \ 151 .name = _name, \ 152 .mux_reg = _reg, \ 153 .mux_shift = _shift, \ 154 .mux_width = _width, \ 155 .gate_shift = -1, \ 156 .divider_shift = -1, \ 157 .parent_names = _parents, \ 158 .num_parents = ARRAY_SIZE(_parents), \ 159 .flags = _flags, \ 160 } 161 162 #define DIV_GATE(_id, _name, _parent, _gate_reg, _gate_shift, _div_reg, \ 163 _div_width, _div_shift) { \ 164 .id = _id, \ 165 .parent = _parent, \ 166 .name = _name, \ 167 .divider_reg = _div_reg, \ 168 .divider_shift = _div_shift, \ 169 .divider_width = _div_width, \ 170 .gate_reg = _gate_reg, \ 171 .gate_shift = _gate_shift, \ 172 .mux_shift = -1, \ 173 .flags = 0, \ 174 } 175 176 int mtk_clk_register_composites(struct device *dev, 177 const struct mtk_composite *mcs, int num, 178 void __iomem *base, spinlock_t *lock, 179 struct clk_hw_onecell_data *clk_data); 180 void mtk_clk_unregister_composites(const struct mtk_composite *mcs, int num, 181 struct clk_hw_onecell_data *clk_data); 182 183 struct mtk_clk_divider { 184 int id; 185 const char *name; 186 const char *parent_name; 187 unsigned long flags; 188 189 u32 div_reg; 190 unsigned char div_shift; 191 unsigned char div_width; 192 unsigned char clk_divider_flags; 193 const struct clk_div_table *clk_div_table; 194 }; 195 196 #define DIV_ADJ(_id, _name, _parent, _reg, _shift, _width) { \ 197 .id = _id, \ 198 .name = _name, \ 199 .parent_name = _parent, \ 200 .div_reg = _reg, \ 201 .div_shift = _shift, \ 202 .div_width = _width, \ 203 } 204 205 int mtk_clk_register_dividers(struct device *dev, 206 const struct mtk_clk_divider *mcds, int num, 207 void __iomem *base, spinlock_t *lock, 208 struct clk_hw_onecell_data *clk_data); 209 void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num, 210 struct clk_hw_onecell_data *clk_data); 211 212 struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num); 213 struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev, 214 unsigned int clk_num); 215 void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data); 216 217 struct clk_hw *mtk_clk_register_ref2usb_tx(const char *name, 218 const char *parent_name, void __iomem *reg); 219 void mtk_clk_unregister_ref2usb_tx(struct clk_hw *hw); 220 221 struct mtk_clk_desc { 222 const struct mtk_gate *clks; 223 size_t num_clks; 224 const struct mtk_composite *composite_clks; 225 size_t num_composite_clks; 226 const struct mtk_clk_divider *divider_clks; 227 size_t num_divider_clks; 228 const struct mtk_fixed_clk *fixed_clks; 229 size_t num_fixed_clks; 230 const struct mtk_fixed_factor *factor_clks; 231 size_t num_factor_clks; 232 const struct mtk_mux *mux_clks; 233 size_t num_mux_clks; 234 const struct mtk_clk_rst_desc *rst_desc; 235 spinlock_t *clk_lock; 236 bool shared_io; 237 238 int (*clk_notifier_func)(struct device *dev, struct clk *clk); 239 unsigned int mfg_clk_idx; 240 }; 241 242 int mtk_clk_pdev_probe(struct platform_device *pdev); 243 int mtk_clk_pdev_remove(struct platform_device *pdev); 244 int mtk_clk_simple_probe(struct platform_device *pdev); 245 int mtk_clk_simple_remove(struct platform_device *pdev); 246 247 #endif /* __DRV_CLK_MTK_H */ 248