clk/actions/owl-factor.h

0001 /* SPDX-License-Identifier: GPL-2.0+ */
0002 //
0003 // OWL factor 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_FACTOR_H_
0012 #define _OWL_FACTOR_H_
0013
0014 #include "owl-common.h"
0015
0016 struct clk_factor_table {
0017     unsigned int        val;
0018     unsigned int        mul;
0019     unsigned int        div;
0020 };
0021
0022 struct owl_factor_hw {
0023     u32         reg;
0024     u8          shift;
0025     u8          width;
0026     u8          fct_flags;
0027     struct clk_factor_table *table;
0028 };
0029
0030 struct owl_factor {
0031     struct owl_factor_hw    factor_hw;
0032     struct owl_clk_common   common;
0033 };
0034
0035 #define OWL_FACTOR_HW(_reg, _shift, _width, _fct_flags, _table)     \
0036     {                               \
0037         .reg        = _reg,                 \
0038         .shift      = _shift,               \
0039         .width      = _width,               \
0040         .fct_flags  = _fct_flags,               \
0041         .table      = _table,               \
0042     }
0043
0044 #define OWL_FACTOR(_struct, _name, _parent, _reg,           \
0045            _shift, _width, _table, _fct_flags, _flags)      \
0046     struct owl_factor _struct = {                   \
0047         .factor_hw = OWL_FACTOR_HW(_reg, _shift,        \
0048                        _width, _fct_flags, _table), \
0049         .common = {                     \
0050             .regmap     = NULL,             \
0051             .hw.init    = CLK_HW_INIT(_name,        \
0052                               _parent,      \
0053                               &owl_factor_ops,  \
0054                               _flags),      \
0055         },                          \
0056     }
0057
0058 #define div_mask(d) ((1 << ((d)->width)) - 1)
0059
0060 static inline struct owl_factor *hw_to_owl_factor(const struct clk_hw *hw)
0061 {
0062     struct owl_clk_common *common = hw_to_owl_clk_common(hw);
0063
0064     return container_of(common, struct owl_factor, common);
0065 }
0066
0067 long owl_factor_helper_round_rate(struct owl_clk_common *common,
0068                 const struct owl_factor_hw *factor_hw,
0069                 unsigned long rate,
0070                 unsigned long *parent_rate);
0071
0072 unsigned long owl_factor_helper_recalc_rate(struct owl_clk_common *common,
0073                      const struct owl_factor_hw *factor_hw,
0074                      unsigned long parent_rate);
0075
0076 int owl_factor_helper_set_rate(const struct owl_clk_common *common,
0077                 const struct owl_factor_hw *factor_hw,
0078                 unsigned long rate,
0079                 unsigned long parent_rate);
0080
0081 extern const struct clk_ops owl_factor_ops;
0082
0083 #endif /* _OWL_FACTOR_H_ */