84 lines
2 KiB
C
84 lines
2 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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//
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// OWL factor clock driver
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//
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// Copyright (c) 2014 Actions Semi Inc.
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// Author: David Liu <liuwei@actions-semi.com>
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//
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// Copyright (c) 2018 Linaro Ltd.
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// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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#ifndef _OWL_FACTOR_H_
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#define _OWL_FACTOR_H_
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#include "owl-common.h"
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struct clk_factor_table {
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unsigned int val;
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unsigned int mul;
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unsigned int div;
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};
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struct owl_factor_hw {
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u32 reg;
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u8 shift;
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u8 width;
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u8 fct_flags;
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struct clk_factor_table *table;
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};
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struct owl_factor {
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struct owl_factor_hw factor_hw;
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struct owl_clk_common common;
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};
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#define OWL_FACTOR_HW(_reg, _shift, _width, _fct_flags, _table) \
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{ \
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.reg = _reg, \
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.shift = _shift, \
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.width = _width, \
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.fct_flags = _fct_flags, \
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.table = _table, \
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}
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#define OWL_FACTOR(_struct, _name, _parent, _reg, \
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_shift, _width, _table, _fct_flags, _flags) \
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struct owl_factor _struct = { \
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.factor_hw = OWL_FACTOR_HW(_reg, _shift, \
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_width, _fct_flags, _table), \
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.common = { \
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.regmap = NULL, \
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.hw.init = CLK_HW_INIT(_name, \
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_parent, \
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&owl_factor_ops, \
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_flags), \
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}, \
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}
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#define div_mask(d) ((1 << ((d)->width)) - 1)
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static inline struct owl_factor *hw_to_owl_factor(const struct clk_hw *hw)
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{
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struct owl_clk_common *common = hw_to_owl_clk_common(hw);
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return container_of(common, struct owl_factor, common);
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}
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long owl_factor_helper_round_rate(struct owl_clk_common *common,
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const struct owl_factor_hw *factor_hw,
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unsigned long rate,
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unsigned long *parent_rate);
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unsigned long owl_factor_helper_recalc_rate(struct owl_clk_common *common,
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const struct owl_factor_hw *factor_hw,
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unsigned long parent_rate);
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int owl_factor_helper_set_rate(const struct owl_clk_common *common,
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const struct owl_factor_hw *factor_hw,
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unsigned long rate,
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unsigned long parent_rate);
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extern const struct clk_ops owl_factor_ops;
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#endif /* _OWL_FACTOR_H_ */
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