drivers/clk/sunxi-ng/ccu_mp.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2016 Maxime Ripard. All rights reserved.
   4  */
   5
   6 #ifndef _CCU_MP_H_
   7 #define _CCU_MP_H_
   8
   9 #include <linux/bitops.h>
  10 #include <linux/clk-provider.h>
  11
  12 #include "ccu_common.h"
  13 #include "ccu_div.h"
  14 #include "ccu_mult.h"
  15 #include "ccu_mux.h"
  16
  17 /*
  18  * struct ccu_mp - Definition of an M-P clock
  19  *
  20  * Clocks based on the formula parent >> P / M
  21  */
  22 struct ccu_mp {
  23         u32                     enable;
  24
  25         struct ccu_div_internal         m;
  26         struct ccu_div_internal         p;
  27         struct ccu_mux_internal mux;
  28
  29         unsigned int            fixed_post_div;
  30
  31         struct ccu_common       common;
  32 };
  33
  34 #define SUNXI_CCU_MP_WITH_MUX_GATE_POSTDIV(_struct, _name, _parents, _reg, \
  35                                            _mshift, _mwidth,            \
  36                                            _pshift, _pwidth,            \
  37                                            _muxshift, _muxwidth,        \
  38                                            _gate, _postdiv, _flags)     \
  39         struct ccu_mp _struct = {                                       \
  40                 .enable = _gate,                                        \
  41                 .m      = _SUNXI_CCU_DIV(_mshift, _mwidth),             \
  42                 .p      = _SUNXI_CCU_DIV(_pshift, _pwidth),             \
  43                 .mux    = _SUNXI_CCU_MUX(_muxshift, _muxwidth),         \
  44                 .fixed_post_div = _postdiv,                             \
  45                 .common = {                                             \
  46                         .reg            = _reg,                         \
  47                         .features       = CCU_FEATURE_FIXED_POSTDIV,    \
  48                         .hw.init        = CLK_HW_INIT_PARENTS(_name,    \
  49                                                               _parents, \
  50                                                               &ccu_mp_ops, \
  51                                                               _flags),  \
  52                 }                                                       \
  53         }
  54
  55 #define SUNXI_CCU_MP_WITH_MUX_GATE(_struct, _name, _parents, _reg,      \
  56                                    _mshift, _mwidth,                    \
  57                                    _pshift, _pwidth,                    \
  58                                    _muxshift, _muxwidth,                \
  59                                    _gate, _flags)                       \
  60         struct ccu_mp _struct = {                                       \
  61                 .enable = _gate,                                        \
  62                 .m      = _SUNXI_CCU_DIV(_mshift, _mwidth),             \
  63                 .p      = _SUNXI_CCU_DIV(_pshift, _pwidth),             \
  64                 .mux    = _SUNXI_CCU_MUX(_muxshift, _muxwidth),         \
  65                 .common = {                                             \
  66                         .reg            = _reg,                         \
  67                         .hw.init        = CLK_HW_INIT_PARENTS(_name,    \
  68                                                               _parents, \
  69                                                               &ccu_mp_ops, \
  70                                                               _flags),  \
  71                 }                                                       \
  72         }
  73
  74 #define SUNXI_CCU_MP_WITH_MUX(_struct, _name, _parents, _reg,           \
  75                               _mshift, _mwidth,                         \
  76                               _pshift, _pwidth,                         \
  77                               _muxshift, _muxwidth,                     \
  78                               _flags)                                   \
  79         SUNXI_CCU_MP_WITH_MUX_GATE(_struct, _name, _parents, _reg,      \
  80                                    _mshift, _mwidth,                    \
  81                                    _pshift, _pwidth,                    \
  82                                    _muxshift, _muxwidth,                \
  83                                    0, _flags)
  84
  85 static inline struct ccu_mp *hw_to_ccu_mp(struct clk_hw *hw)
  86 {
  87         struct ccu_common *common = hw_to_ccu_common(hw);
  88
  89         return container_of(common, struct ccu_mp, common);
  90 }
  91
  92 extern const struct clk_ops ccu_mp_ops;
  93
  94 /*
  95  * Special class of M-P clock that supports MMC timing modes
  96  *
  97  * Since the MMC clock registers all follow the same layout, we can
  98  * simplify the macro for this particular case. In addition, as
  99  * switching modes also affects the output clock rate, we need to
 100  * have CLK_GET_RATE_NOCACHE for all these types of clocks.
 101  */
 102
 103 #define SUNXI_CCU_MP_MMC_WITH_MUX_GATE(_struct, _name, _parents, _reg,  \
 104                                        _flags)                          \
 105         struct ccu_mp _struct = {                                       \
 106                 .enable = BIT(31),                                      \
 107                 .m      = _SUNXI_CCU_DIV(0, 4),                         \
 108                 .p      = _SUNXI_CCU_DIV(16, 2),                        \
 109                 .mux    = _SUNXI_CCU_MUX(24, 2),                        \
 110                 .common = {                                             \
 111                         .reg            = _reg,                         \
 112                         .features       = CCU_FEATURE_MMC_TIMING_SWITCH, \
 113                         .hw.init        = CLK_HW_INIT_PARENTS(_name,    \
 114                                                               _parents, \
 115                                                               &ccu_mp_mmc_ops, \
 116                                                               CLK_GET_RATE_NOCACHE | \
 117                                                               _flags),  \
 118                 }                                                       \
 119         }
 120
 121 extern const struct clk_ops ccu_mp_mmc_ops;
 122
 123 #endif /* _CCU_MP_H_ */