75 lines
2 KiB
C
75 lines
2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Spreadtrum multiplexer clock driver
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//
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// Copyright (C) 2017 Spreadtrum, Inc.
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// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
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#ifndef _SPRD_MUX_H_
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#define _SPRD_MUX_H_
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#include "common.h"
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/**
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* struct sprd_mux_ssel - Mux clock's source select bits in its register
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* @shift: Bit offset of the divider in its register
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* @width: Width of the divider field in its register
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* @table: For some mux clocks, not all sources are used on some special
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* chips, this matches the value of mux clock's register and the
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* sources which are used for this mux clock
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*/
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struct sprd_mux_ssel {
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u8 shift;
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u8 width;
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const u8 *table;
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};
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struct sprd_mux {
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struct sprd_mux_ssel mux;
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struct sprd_clk_common common;
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};
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#define _SPRD_MUX_CLK(_shift, _width, _table) \
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{ \
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.shift = _shift, \
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.width = _width, \
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.table = _table, \
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}
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#define SPRD_MUX_CLK_TABLE(_struct, _name, _parents, _table, \
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_reg, _shift, _width, \
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_flags) \
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struct sprd_mux _struct = { \
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.mux = _SPRD_MUX_CLK(_shift, _width, _table), \
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.common = { \
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.regmap = NULL, \
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.reg = _reg, \
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.hw.init = CLK_HW_INIT_PARENTS(_name, \
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_parents, \
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&sprd_mux_ops, \
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_flags), \
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} \
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}
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#define SPRD_MUX_CLK(_struct, _name, _parents, _reg, \
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_shift, _width, _flags) \
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SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL, \
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_reg, _shift, _width, _flags)
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static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
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{
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struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
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return container_of(common, struct sprd_mux, common);
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}
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extern const struct clk_ops sprd_mux_ops;
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u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
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const struct sprd_mux_ssel *mux);
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int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
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const struct sprd_mux_ssel *mux,
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u8 index);
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#endif /* _SPRD_MUX_H_ */
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