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 u16 reg; 44 u32 enable; 45 46 struct ccu_mux_internal mux; 47 struct ccu_common common; 48 }; 49 50 #define SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, _table, \ 51 _reg, _shift, _width, _gate, \ 52 _flags) \ 53 struct ccu_mux _struct = { \ 54 .enable = _gate, \ 55 .mux = _SUNXI_CCU_MUX_TABLE(_shift, _width, _table), \ 56 .common = { \ 57 .reg = _reg, \ 58 .hw.init = CLK_HW_INIT_PARENTS(_name, \ 59 _parents, \ 60 &ccu_mux_ops, \ 61 _flags), \ 62 } \ 63 } 64 65 #define SUNXI_CCU_MUX_WITH_GATE(_struct, _name, _parents, _reg, \ 66 _shift, _width, _gate, _flags) \ 67 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \ 68 _reg, _shift, _width, _gate, \ 69 _flags) 70 71 #define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, \ 72 _flags) \ 73 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \ 74 _reg, _shift, _width, 0, _flags) 75 76 static inline struct ccu_mux *hw_to_ccu_mux(struct clk_hw *hw) 77 { 78 struct ccu_common *common = hw_to_ccu_common(hw); 79 80 return container_of(common, struct ccu_mux, common); 81 } 82 83 extern const struct clk_ops ccu_mux_ops; 84 85 unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common, 86 struct ccu_mux_internal *cm, 87 int parent_index, 88 unsigned long parent_rate); 89 int ccu_mux_helper_determine_rate(struct ccu_common *common, 90 struct ccu_mux_internal *cm, 91 struct clk_rate_request *req, 92 unsigned long (*round)(struct ccu_mux_internal *, 93 struct clk_hw *, 94 unsigned long *, 95 unsigned long, 96 void *), 97 void *data); 98 u8 ccu_mux_helper_get_parent(struct ccu_common *common, 99 struct ccu_mux_internal *cm); 100 int ccu_mux_helper_set_parent(struct ccu_common *common, 101 struct ccu_mux_internal *cm, 102 u8 index); 103 104 struct ccu_mux_nb { 105 struct notifier_block clk_nb; 106 struct ccu_common *common; 107 struct ccu_mux_internal *cm; 108 109 u32 delay_us; /* How many us to wait after reparenting */ 110 u8 bypass_index; /* Which parent to temporarily use */ 111 u8 original_index; /* This is set by the notifier callback */ 112 }; 113 114 #define to_ccu_mux_nb(_nb) container_of(_nb, struct ccu_mux_nb, clk_nb) 115 116 int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb); 117 118 #endif /* _CCU_MUX_H_ */ 119