drivers/clk/sunxi-ng/ccu_div.h

   1 /*
   2  * Copyright (c) 2016 Maxime Ripard. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _CCU_DIV_H_
  15 #define _CCU_DIV_H_
  16
  17 #include <linux/clk-provider.h>
  18
  19 #include "ccu_common.h"
  20 #include "ccu_mux.h"
  21
  22 /**
  23  * struct ccu_div_internal - Internal divider description
  24  * @shift: Bit offset of the divider in its register
  25  * @width: Width of the divider field in its register
  26  * @max: Maximum value allowed for that divider. This is the
  27  *       arithmetic value, not the maximum value to be set in the
  28  *       register.
  29  * @flags: clk_divider flags to apply on this divider
  30  * @table: Divider table pointer (if applicable)
  31  *
  32  * That structure represents a single divider, and is meant to be
  33  * embedded in other structures representing the various clock
  34  * classes.
  35  *
  36  * It is basically a wrapper around the clk_divider functions
  37  * arguments.
  38  */
  39 struct ccu_div_internal {
  40         u8                      shift;
  41         u8                      width;
  42
  43         u32                     max;
  44         u32                     offset;
  45
  46         u32                     flags;
  47
  48         struct clk_div_table    *table;
  49 };
  50
  51 #define _SUNXI_CCU_DIV_TABLE_FLAGS(_shift, _width, _table, _flags)      \
  52         {                                                               \
  53                 .shift  = _shift,                                       \
  54                 .width  = _width,                                       \
  55                 .flags  = _flags,                                       \
  56                 .table  = _table,                                       \
  57         }
  58
  59 #define _SUNXI_CCU_DIV_TABLE(_shift, _width, _table)                    \
  60         _SUNXI_CCU_DIV_TABLE_FLAGS(_shift, _width, _table, 0)
  61
  62 #define _SUNXI_CCU_DIV_OFFSET_MAX_FLAGS(_shift, _width, _off, _max, _flags) \
  63         {                                                               \
  64                 .shift  = _shift,                                       \
  65                 .width  = _width,                                       \
  66                 .flags  = _flags,                                       \
  67                 .max    = _max,                                         \
  68                 .offset = _off,                                         \
  69         }
  70
  71 #define _SUNXI_CCU_DIV_MAX_FLAGS(_shift, _width, _max, _flags)          \
  72         _SUNXI_CCU_DIV_OFFSET_MAX_FLAGS(_shift, _width, 1, _max, _flags)
  73
  74 #define _SUNXI_CCU_DIV_FLAGS(_shift, _width, _flags)                    \
  75         _SUNXI_CCU_DIV_MAX_FLAGS(_shift, _width, 0, _flags)
  76
  77 #define _SUNXI_CCU_DIV_MAX(_shift, _width, _max)                        \
  78         _SUNXI_CCU_DIV_MAX_FLAGS(_shift, _width, _max, 0)
  79
  80 #define _SUNXI_CCU_DIV_OFFSET(_shift, _width, _offset)                  \
  81         _SUNXI_CCU_DIV_OFFSET_MAX_FLAGS(_shift, _width, _offset, 0, 0)
  82
  83 #define _SUNXI_CCU_DIV(_shift, _width)                                  \
  84         _SUNXI_CCU_DIV_FLAGS(_shift, _width, 0)
  85
  86 struct ccu_div {
  87         u32                     enable;
  88
  89         struct ccu_div_internal div;
  90         struct ccu_mux_internal mux;
  91         struct ccu_common       common;
  92         unsigned int            fixed_post_div;
  93 };
  94
  95 #define SUNXI_CCU_DIV_TABLE_WITH_GATE(_struct, _name, _parent, _reg,    \
  96                                       _shift, _width,                   \
  97                                       _table, _gate, _flags)            \
  98         struct ccu_div _struct = {                                      \
  99                 .div            = _SUNXI_CCU_DIV_TABLE(_shift, _width,  \
 100                                                        _table),         \
 101                 .enable         = _gate,                                \
 102                 .common = {                                             \
 103                         .reg            = _reg,                         \
 104                         .hw.init        = CLK_HW_INIT(_name,            \
 105                                                       _parent,          \
 106                                                       &ccu_div_ops,     \
 107                                                       _flags),          \
 108                 }                                                       \
 109         }
 110
 111
 112 #define SUNXI_CCU_DIV_TABLE(_struct, _name, _parent, _reg,              \
 113                             _shift, _width,                             \
 114                             _table, _flags)                             \
 115         SUNXI_CCU_DIV_TABLE_WITH_GATE(_struct, _name, _parent, _reg,    \
 116                                       _shift, _width, _table, 0,        \
 117                                       _flags)
 118
 119 #define SUNXI_CCU_M_WITH_MUX_TABLE_GATE(_struct, _name,                 \
 120                                         _parents, _table,               \
 121                                         _reg,                           \
 122                                         _mshift, _mwidth,               \
 123                                         _muxshift, _muxwidth,           \
 124                                         _gate, _flags)                  \
 125         struct ccu_div _struct = {                                      \
 126                 .enable = _gate,                                        \
 127                 .div    = _SUNXI_CCU_DIV(_mshift, _mwidth),             \
 128                 .mux    = _SUNXI_CCU_MUX_TABLE(_muxshift, _muxwidth, _table), \
 129                 .common = {                                             \
 130                         .reg            = _reg,                         \
 131                         .hw.init        = CLK_HW_INIT_PARENTS(_name,    \
 132                                                               _parents, \
 133                                                               &ccu_div_ops, \
 134                                                               _flags),  \
 135                 },                                                      \
 136         }
 137
 138 #define SUNXI_CCU_M_WITH_MUX_GATE(_struct, _name, _parents, _reg,       \
 139                                   _mshift, _mwidth, _muxshift, _muxwidth, \
 140                                   _gate, _flags)                        \
 141         SUNXI_CCU_M_WITH_MUX_TABLE_GATE(_struct, _name,                 \
 142                                         _parents, NULL,                 \
 143                                         _reg, _mshift, _mwidth,         \
 144                                         _muxshift, _muxwidth,           \
 145                                         _gate, _flags)
 146
 147 #define SUNXI_CCU_M_WITH_MUX(_struct, _name, _parents, _reg,            \
 148                              _mshift, _mwidth, _muxshift, _muxwidth,    \
 149                              _flags)                                    \
 150         SUNXI_CCU_M_WITH_MUX_TABLE_GATE(_struct, _name,                 \
 151                                         _parents, NULL,                 \
 152                                         _reg, _mshift, _mwidth,         \
 153                                         _muxshift, _muxwidth,           \
 154                                         0, _flags)
 155
 156
 157 #define SUNXI_CCU_M_WITH_GATE(_struct, _name, _parent, _reg,            \
 158                               _mshift, _mwidth, _gate,                  \
 159                               _flags)                                   \
 160         struct ccu_div _struct = {                                      \
 161                 .enable = _gate,                                        \
 162                 .div    = _SUNXI_CCU_DIV(_mshift, _mwidth),             \
 163                 .common = {                                             \
 164                         .reg            = _reg,                         \
 165                         .hw.init        = CLK_HW_INIT(_name,            \
 166                                                       _parent,          \
 167                                                       &ccu_div_ops,     \
 168                                                       _flags),          \
 169                 },                                                      \
 170         }
 171
 172 #define SUNXI_CCU_M(_struct, _name, _parent, _reg, _mshift, _mwidth,    \
 173                     _flags)                                             \
 174         SUNXI_CCU_M_WITH_GATE(_struct, _name, _parent, _reg,            \
 175                               _mshift, _mwidth, 0, _flags)
 176
 177 static inline struct ccu_div *hw_to_ccu_div(struct clk_hw *hw)
 178 {
 179         struct ccu_common *common = hw_to_ccu_common(hw);
 180
 181         return container_of(common, struct ccu_div, common);
 182 }
 183
 184 extern const struct clk_ops ccu_div_ops;
 185
 186 #endif /* _CCU_DIV_H_ */