drivers/clk/actions/owl-mux.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // OWL mux 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_MUX_H_
  12 #define _OWL_MUX_H_
  13
  14 #include "owl-common.h"
  15
  16 struct owl_mux_hw {
  17         u32                     reg;
  18         u8                      shift;
  19         u8                      width;
  20 };
  21
  22 struct owl_mux {
  23         struct owl_mux_hw       mux_hw;
  24         struct owl_clk_common   common;
  25 };
  26
  27 #define OWL_MUX_HW(_reg, _shift, _width)                \
  28         {                                               \
  29                 .reg    = _reg,                         \
  30                 .shift  = _shift,                       \
  31                 .width  = _width,                       \
  32         }
  33
  34 #define OWL_MUX(_struct, _name, _parents, _reg,                         \
  35                 _shift, _width, _flags)                                 \
  36         struct owl_mux _struct = {                                      \
  37                 .mux_hw = OWL_MUX_HW(_reg, _shift, _width),             \
  38                 .common = {                                             \
  39                         .regmap = NULL,                                 \
  40                         .hw.init = CLK_HW_INIT_PARENTS(_name,           \
  41                                                        _parents,        \
  42                                                        &owl_mux_ops,    \
  43                                                        _flags),         \
  44                 },                                                      \
  45         }
  46
  47 static inline struct owl_mux *hw_to_owl_mux(const struct clk_hw *hw)
  48 {
  49         struct owl_clk_common *common = hw_to_owl_clk_common(hw);
  50
  51         return container_of(common, struct owl_mux, common);
  52 }
  53
  54 u8 owl_mux_helper_get_parent(const struct owl_clk_common *common,
  55                              const struct owl_mux_hw *mux_hw);
  56 int owl_mux_helper_set_parent(const struct owl_clk_common *common,
  57                               struct owl_mux_hw *mux_hw, u8 index);
  58
  59 extern const struct clk_ops owl_mux_ops;
  60
  61 #endif /* _OWL_MUX_H_ */