1 #ifndef _CCU_MUX_H_ 2 #define _CCU_MUX_H_ 3 4 #include <linux/clk-provider.h> 5 6 #include "ccu_common.h" 7 8 struct ccu_mux_fixed_prediv { 9 u8 index; 10 u16 div; 11 }; 12 13 struct ccu_mux_internal { 14 u8 shift; 15 u8 width; 16 const u8 *table; 17 18 const struct ccu_mux_fixed_prediv *fixed_predivs; 19 u8 n_predivs; 20 21 struct { 22 u8 index; 23 u8 shift; 24 u8 width; 25 } variable_prediv; 26 }; 27 28 #define _SUNXI_CCU_MUX_TABLE(_shift, _width, _table) \ 29 { \ 30 .shift = _shift, \ 31 .width = _width, \ 32 .table = _table, \ 33 } 34 35 #define _SUNXI_CCU_MUX(_shift, _width) \ 36 _SUNXI_CCU_MUX_TABLE(_shift, _width, NULL) 37 38 struct ccu_mux { 39 u16 reg; 40 u32 enable; 41 42 struct ccu_mux_internal mux; 43 struct ccu_common common; 44 }; 45 46 #define SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, _table, \ 47 _reg, _shift, _width, _gate, \ 48 _flags) \ 49 struct ccu_mux _struct = { \ 50 .enable = _gate, \ 51 .mux = _SUNXI_CCU_MUX_TABLE(_shift, _width, _table), \ 52 .common = { \ 53 .reg = _reg, \ 54 .hw.init = CLK_HW_INIT_PARENTS(_name, \ 55 _parents, \ 56 &ccu_mux_ops, \ 57 _flags), \ 58 } \ 59 } 60 61 #define SUNXI_CCU_MUX_WITH_GATE(_struct, _name, _parents, _reg, \ 62 _shift, _width, _gate, _flags) \ 63 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \ 64 _reg, _shift, _width, _gate, \ 65 _flags) 66 67 #define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, \ 68 _flags) \ 69 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \ 70 _reg, _shift, _width, 0, _flags) 71 72 static inline struct ccu_mux *hw_to_ccu_mux(struct clk_hw *hw) 73 { 74 struct ccu_common *common = hw_to_ccu_common(hw); 75 76 return container_of(common, struct ccu_mux, common); 77 } 78 79 extern const struct clk_ops ccu_mux_ops; 80 81 void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common, 82 struct ccu_mux_internal *cm, 83 int parent_index, 84 unsigned long *parent_rate); 85 int ccu_mux_helper_determine_rate(struct ccu_common *common, 86 struct ccu_mux_internal *cm, 87 struct clk_rate_request *req, 88 unsigned long (*round)(struct ccu_mux_internal *, 89 unsigned long, 90 unsigned long, 91 void *), 92 void *data); 93 u8 ccu_mux_helper_get_parent(struct ccu_common *common, 94 struct ccu_mux_internal *cm); 95 int ccu_mux_helper_set_parent(struct ccu_common *common, 96 struct ccu_mux_internal *cm, 97 u8 index); 98 99 struct ccu_mux_nb { 100 struct notifier_block clk_nb; 101 struct ccu_common *common; 102 struct ccu_mux_internal *cm; 103 104 u32 delay_us; /* How many us to wait after reparenting */ 105 u8 bypass_index; /* Which parent to temporarily use */ 106 u8 original_index; /* This is set by the notifier callback */ 107 }; 108 109 #define to_ccu_mux_nb(_nb) container_of(_nb, struct ccu_mux_nb, clk_nb) 110 111 int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb); 112 113 #endif /* _CCU_MUX_H_ */ 114