drivers/clk/actions/owl-divider.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // OWL divider clock driver
   4 //
   5 // Copyright (c) 2014 Actions Semi Inc.
   6 // Author: David Liu <liuwei@actions-semi.com>
   7 //
   8 // Copyright (c) 2018 Linaro Ltd.
   9 // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
  10
  11 #ifndef _OWL_DIVIDER_H_
  12 #define _OWL_DIVIDER_H_
  13
  14 #include "owl-common.h"
  15
  16 struct owl_divider_hw {
  17         u32                     reg;
  18         u8                      shift;
  19         u8                      width;
  20         u8                      div_flags;
  21         struct clk_div_table    *table;
  22 };
  23
  24 struct owl_divider {
  25         struct owl_divider_hw   div_hw;
  26         struct owl_clk_common   common;
  27 };
  28
  29 #define OWL_DIVIDER_HW(_reg, _shift, _width, _div_flags, _table)        \
  30         {                                                               \
  31                 .reg            = _reg,                                 \
  32                 .shift          = _shift,                               \
  33                 .width          = _width,                               \
  34                 .div_flags      = _div_flags,                           \
  35                 .table          = _table,                               \
  36         }
  37
  38 #define OWL_DIVIDER(_struct, _name, _parent, _reg,                      \
  39                     _shift, _width, _table, _div_flags, _flags)         \
  40         struct owl_divider _struct = {                                  \
  41                 .div_hw = OWL_DIVIDER_HW(_reg, _shift, _width,          \
  42                                          _div_flags, _table),           \
  43                 .common = {                                             \
  44                         .regmap         = NULL,                         \
  45                         .hw.init        = CLK_HW_INIT(_name,            \
  46                                                       _parent,          \
  47                                                       &owl_divider_ops, \
  48                                                       _flags),          \
  49                 },                                                      \
  50         }
  51
  52 static inline struct owl_divider *hw_to_owl_divider(const struct clk_hw *hw)
  53 {
  54         struct owl_clk_common *common = hw_to_owl_clk_common(hw);
  55
  56         return container_of(common, struct owl_divider, common);
  57 }
  58
  59 long owl_divider_helper_round_rate(struct owl_clk_common *common,
  60                                 const struct owl_divider_hw *div_hw,
  61                                 unsigned long rate,
  62                                 unsigned long *parent_rate);
  63
  64 unsigned long owl_divider_helper_recalc_rate(struct owl_clk_common *common,
  65                                          const struct owl_divider_hw *div_hw,
  66                                          unsigned long parent_rate);
  67
  68 int owl_divider_helper_set_rate(const struct owl_clk_common *common,
  69                                 const struct owl_divider_hw *div_hw,
  70                                 unsigned long rate,
  71                                 unsigned long parent_rate);
  72
  73 extern const struct clk_ops owl_divider_ops;
  74
  75 #endif /* _OWL_DIVIDER_H_ */