drivers/clk/actions/owl-factor.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 //
   3 // OWL factor clock driver
   4 //
   5 // Copyright (c) 2014 Actions Semi Inc.
   6 // Author: David Liu <[email protected]>
   7 //
   8 // Copyright (c) 2018 Linaro Ltd.
   9 // Author: Manivannan Sadhasivam <[email protected]>
  10
  11 #ifndef _OWL_FACTOR_H_
  12 #define _OWL_FACTOR_H_
  13
  14 #include "owl-common.h"
  15
  16 struct clk_factor_table {
  17         unsigned int            val;
  18         unsigned int            mul;
  19         unsigned int            div;
  20 };
  21
  22 struct owl_factor_hw {
  23         u32                     reg;
  24         u8                      shift;
  25         u8                      width;
  26         u8                      fct_flags;
  27         struct clk_factor_table *table;
  28 };
  29
  30 struct owl_factor {
  31         struct owl_factor_hw    factor_hw;
  32         struct owl_clk_common   common;
  33 };
  34
  35 #define OWL_FACTOR_HW(_reg, _shift, _width, _fct_flags, _table)         \
  36         {                                                               \
  37                 .reg            = _reg,                                 \
  38                 .shift          = _shift,                               \
  39                 .width          = _width,                               \
  40                 .fct_flags      = _fct_flags,                           \
  41                 .table          = _table,                               \
  42         }
  43
  44 #define OWL_FACTOR(_struct, _name, _parent, _reg,                       \
  45                    _shift, _width, _table, _fct_flags, _flags)          \
  46         struct owl_factor _struct = {                                   \
  47                 .factor_hw = OWL_FACTOR_HW(_reg, _shift,                \
  48                                            _width, _fct_flags, _table), \
  49                 .common = {                                             \
  50                         .regmap         = NULL,                         \
  51                         .hw.init        = CLK_HW_INIT(_name,            \
  52                                                       _parent,          \
  53                                                       &owl_factor_ops,  \
  54                                                       _flags),          \
  55                 },                                                      \
  56         }
  57
  58 #define div_mask(d) ((1 << ((d)->width)) - 1)
  59
  60 static inline struct owl_factor *hw_to_owl_factor(const struct clk_hw *hw)
  61 {
  62         struct owl_clk_common *common = hw_to_owl_clk_common(hw);
  63
  64         return container_of(common, struct owl_factor, common);
  65 }
  66
  67 long owl_factor_helper_round_rate(struct owl_clk_common *common,
  68                                 const struct owl_factor_hw *factor_hw,
  69                                 unsigned long rate,
  70                                 unsigned long *parent_rate);
  71
  72 unsigned long owl_factor_helper_recalc_rate(struct owl_clk_common *common,
  73                                          const struct owl_factor_hw *factor_hw,
  74                                          unsigned long parent_rate);
  75
  76 int owl_factor_helper_set_rate(const struct owl_clk_common *common,
  77                                 const struct owl_factor_hw *factor_hw,
  78                                 unsigned long rate,
  79                                 unsigned long parent_rate);
  80
  81 extern const struct clk_ops owl_factor_ops;
  82
  83 #endif /* _OWL_FACTOR_H_ */