drivers/clk/sunxi-ng/ccu_mux.h

   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_ */