drivers/clk/sprd/mux.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 //
   3 // Spreadtrum multiplexer clock driver
   4 //
   5 // Copyright (C) 2017 Spreadtrum, Inc.
   6 // Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
   7
   8 #ifndef _SPRD_MUX_H_
   9 #define _SPRD_MUX_H_
  10
  11 #include "common.h"
  12
  13 /**
  14  * struct sprd_mux_ssel - Mux clock's source select bits in its register
  15  * @shift: Bit offset of the divider in its register
  16  * @width: Width of the divider field in its register
  17  * @table: For some mux clocks, not all sources are used on some special
  18  *         chips, this matches the value of mux clock's register and the
  19  *         sources which are used for this mux clock
  20  */
  21 struct sprd_mux_ssel {
  22         u8              shift;
  23         u8              width;
  24         const u8        *table;
  25 };
  26
  27 struct sprd_mux {
  28         struct sprd_mux_ssel mux;
  29         struct sprd_clk_common  common;
  30 };
  31
  32 #define _SPRD_MUX_CLK(_shift, _width, _table)           \
  33         {                                               \
  34                 .shift  = _shift,                       \
  35                 .width  = _width,                       \
  36                 .table  = _table,                       \
  37         }
  38
  39 #define SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table,       \
  40                                 _reg, _shift, _width, _flags, _fn)      \
  41         struct sprd_mux _struct = {                                     \
  42                 .mux    = _SPRD_MUX_CLK(_shift, _width, _table),        \
  43                 .common = {                                             \
  44                         .regmap         = NULL,                         \
  45                         .reg            = _reg,                         \
  46                         .hw.init = _fn(_name, _parents,                 \
  47                                        &sprd_mux_ops, _flags),          \
  48                 }                                                       \
  49         }
  50
  51 #define SPRD_MUX_CLK_TABLE(_struct, _name, _parents, _table,            \
  52                            _reg, _shift, _width, _flags)                \
  53         SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table,       \
  54                                 _reg, _shift, _width, _flags,           \
  55                                 CLK_HW_INIT_PARENTS)
  56
  57 #define SPRD_MUX_CLK(_struct, _name, _parents, _reg,            \
  58                      _shift, _width, _flags)                    \
  59         SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL,      \
  60                            _reg, _shift, _width, _flags)
  61
  62 #define SPRD_MUX_CLK_DATA_TABLE(_struct, _name, _parents, _table,       \
  63                                 _reg, _shift, _width, _flags)           \
  64         SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table,       \
  65                                 _reg, _shift, _width, _flags,           \
  66                                 CLK_HW_INIT_PARENTS_DATA)
  67
  68 #define SPRD_MUX_CLK_DATA(_struct, _name, _parents, _reg,               \
  69                           _shift, _width, _flags)                       \
  70         SPRD_MUX_CLK_DATA_TABLE(_struct, _name, _parents, NULL,         \
  71                                 _reg, _shift, _width, _flags)
  72
  73 static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
  74 {
  75         struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
  76
  77         return container_of(common, struct sprd_mux, common);
  78 }
  79
  80 extern const struct clk_ops sprd_mux_ops;
  81
  82 u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
  83                               const struct sprd_mux_ssel *mux);
  84 int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
  85                                const struct sprd_mux_ssel *mux,
  86                                u8 index);
  87
  88 #endif /* _SPRD_MUX_H_ */