1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _CCU_MUX_H_ 3 #define _CCU_MUX_H_ 4 5 #include <linux/clk-provider.h> 6 7 #include "ccu_common.h" 8 9 struct ccu_mux_fixed_prediv { 10 u8 index; 11 u16 div; 12 }; 13 14 struct ccu_mux_var_prediv { 15 u8 index; 16 u8 shift; 17 u8 width; 18 }; 19 20 struct ccu_mux_internal { 21 u8 shift; 22 u8 width; 23 const u8 *table; 24 25 const struct ccu_mux_fixed_prediv *fixed_predivs; 26 u8 n_predivs; 27 28 const struct ccu_mux_var_prediv *var_predivs; 29 u8 n_var_predivs; 30 }; 31 32 #define _SUNXI_CCU_MUX_TABLE(_shift, _width, _table) \ 33 { \ 34 .shift = _shift, \ 35 .width = _width, \ 36 .table = _table, \ 37 } 38 39 #define _SUNXI_CCU_MUX(_shift, _width) \ 40 _SUNXI_CCU_MUX_TABLE(_shift, _width, NULL) 41 42 struct ccu_mux { 43 u32 enable; 44 45 struct ccu_mux_internal mux; 46 struct ccu_common common; 47 }; 48 49 #define SUNXI_CCU_MUX_TABLE_WITH_GATE_FEAT(_struct, _name, _parents, _table, \ 50 _reg, _shift, _width, _gate, \ 51 _flags, _features) \ 52 struct ccu_mux _struct = { \ 53 .enable = _gate, \ 54 .mux = _SUNXI_CCU_MUX_TABLE(_shift, _width, _table), \ 55 .common = { \ 56 .reg = _reg, \ 57 .hw.init = CLK_HW_INIT_PARENTS(_name, \ 58 _parents, \ 59 &ccu_mux_ops, \ 60 _flags), \ 61 .features = _features, \ 62 } \ 63 } 64 65 #define SUNXI_CCU_MUX_TABLE_WITH_GATE_CLOSEST(_struct, _name, _parents, \ 66 _table, _reg, _shift, \ 67 _width, _gate, _flags) \ 68 SUNXI_CCU_MUX_TABLE_WITH_GATE_FEAT(_struct, _name, _parents, \ 69 _table, _reg, _shift, \ 70 _width, _gate, _flags, \ 71 CCU_FEATURE_CLOSEST_RATE) 72 73 #define SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, _table, \ 74 _reg, _shift, _width, _gate, \ 75 _flags) \ 76 SUNXI_CCU_MUX_TABLE_WITH_GATE_FEAT(_struct, _name, _parents, \ 77 _table, _reg, _shift, \ 78 _width, _gate, _flags, 0) 79 80 #define SUNXI_CCU_MUX_WITH_GATE(_struct, _name, _parents, _reg, \ 81 _shift, _width, _gate, _flags) \ 82 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \ 83 _reg, _shift, _width, _gate, \ 84 _flags) 85 86 #define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, \ 87 _flags) \ 88 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \ 89 _reg, _shift, _width, 0, _flags) 90 91 #define SUNXI_CCU_MUX_DATA_WITH_GATE(_struct, _name, _parents, _reg, \ 92 _shift, _width, _gate, _flags) \ 93 struct ccu_mux _struct = { \ 94 .enable = _gate, \ 95 .mux = _SUNXI_CCU_MUX(_shift, _width), \ 96 .common = { \ 97 .reg = _reg, \ 98 .hw.init = CLK_HW_INIT_PARENTS_DATA(_name, \ 99 _parents, \ 100 &ccu_mux_ops, \ 101 _flags), \ 102 } \ 103 } 104 105 #define SUNXI_CCU_MUX_DATA(_struct, _name, _parents, _reg, \ 106 _shift, _width, _flags) \ 107 SUNXI_CCU_MUX_DATA_WITH_GATE(_struct, _name, _parents, _reg, \ 108 _shift, _width, 0, _flags) 109 110 #define SUNXI_CCU_MUX_HW_WITH_GATE(_struct, _name, _parents, _reg, \ 111 _shift, _width, _gate, _flags) \ 112 struct ccu_mux _struct = { \ 113 .enable = _gate, \ 114 .mux = _SUNXI_CCU_MUX(_shift, _width), \ 115 .common = { \ 116 .reg = _reg, \ 117 .hw.init = CLK_HW_INIT_PARENTS_HW(_name, \ 118 _parents, \ 119 &ccu_mux_ops, \ 120 _flags), \ 121 } \ 122 } 123 hw_to_ccu_mux(struct clk_hw * hw)124 static inline struct ccu_mux *hw_to_ccu_mux(struct clk_hw *hw) 125 { 126 struct ccu_common *common = hw_to_ccu_common(hw); 127 128 return container_of(common, struct ccu_mux, common); 129 } 130 131 extern const struct clk_ops ccu_mux_ops; 132 133 unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common, 134 struct ccu_mux_internal *cm, 135 int parent_index, 136 unsigned long parent_rate); 137 int ccu_mux_helper_determine_rate(struct ccu_common *common, 138 struct ccu_mux_internal *cm, 139 struct clk_rate_request *req, 140 unsigned long (*round)(struct ccu_mux_internal *, 141 struct clk_hw *, 142 unsigned long *, 143 unsigned long, 144 void *), 145 void *data); 146 u8 ccu_mux_helper_get_parent(struct ccu_common *common, 147 struct ccu_mux_internal *cm); 148 int ccu_mux_helper_set_parent(struct ccu_common *common, 149 struct ccu_mux_internal *cm, 150 u8 index); 151 152 struct ccu_mux_nb { 153 struct notifier_block clk_nb; 154 struct ccu_common *common; 155 struct ccu_mux_internal *cm; 156 157 u32 delay_us; /* How many us to wait after reparenting */ 158 u8 bypass_index; /* Which parent to temporarily use */ 159 u8 original_index; /* This is set by the notifier callback */ 160 }; 161 162 #define to_ccu_mux_nb(_nb) container_of(_nb, struct ccu_mux_nb, clk_nb) 163 164 int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb); 165 166 #endif /* _CCU_MUX_H_ */ 167