clk/actions/owl-divider.h

0001 /* SPDX-License-Identifier: GPL-2.0+ */
0002 //
0003 // OWL divider clock driver
0004 //
0005 // Copyright (c) 2014 Actions Semi Inc.
0006 // Author: David Liu <liuwei@actions-semi.com>
0007 //
0008 // Copyright (c) 2018 Linaro Ltd.
0009 // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
0010
0011 #ifndef _OWL_DIVIDER_H_
0012 #define _OWL_DIVIDER_H_
0013
0014 #include "owl-common.h"
0015
0016 struct owl_divider_hw {
0017     u32         reg;
0018     u8          shift;
0019     u8          width;
0020     u8          div_flags;
0021     struct clk_div_table    *table;
0022 };
0023
0024 struct owl_divider {
0025     struct owl_divider_hw   div_hw;
0026     struct owl_clk_common   common;
0027 };
0028
0029 #define OWL_DIVIDER_HW(_reg, _shift, _width, _div_flags, _table)    \
0030     {                               \
0031         .reg        = _reg,                 \
0032         .shift      = _shift,               \
0033         .width      = _width,               \
0034         .div_flags  = _div_flags,               \
0035         .table      = _table,               \
0036     }
0037
0038 #define OWL_DIVIDER(_struct, _name, _parent, _reg,          \
0039             _shift, _width, _table, _div_flags, _flags)     \
0040     struct owl_divider _struct = {                  \
0041         .div_hw = OWL_DIVIDER_HW(_reg, _shift, _width,      \
0042                      _div_flags, _table),       \
0043         .common = {                     \
0044             .regmap     = NULL,             \
0045             .hw.init    = CLK_HW_INIT(_name,        \
0046                               _parent,      \
0047                               &owl_divider_ops, \
0048                               _flags),      \
0049         },                          \
0050     }
0051
0052 static inline struct owl_divider *hw_to_owl_divider(const struct clk_hw *hw)
0053 {
0054     struct owl_clk_common *common = hw_to_owl_clk_common(hw);
0055
0056     return container_of(common, struct owl_divider, common);
0057 }
0058
0059 long owl_divider_helper_round_rate(struct owl_clk_common *common,
0060                 const struct owl_divider_hw *div_hw,
0061                 unsigned long rate,
0062                 unsigned long *parent_rate);
0063
0064 unsigned long owl_divider_helper_recalc_rate(struct owl_clk_common *common,
0065                      const struct owl_divider_hw *div_hw,
0066                      unsigned long parent_rate);
0067
0068 int owl_divider_helper_set_rate(const struct owl_clk_common *common,
0069                 const struct owl_divider_hw *div_hw,
0070                 unsigned long rate,
0071                 unsigned long parent_rate);
0072
0073 extern const struct clk_ops owl_divider_ops;
0074
0075 #endif /* _OWL_DIVIDER_H_ */