1/* SPDX-License-Identifier: GPL-2.0 */
 2//
 3// Spreadtrum multiplexer clock driver
 4//
 5// Copyright (C) 2017 Spreadtrum, Inc.
 6// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
 7
 8#ifndef _SPRD_MUX_H_
 9#define _SPRD_MUX_H_
10
11#include "common.h"
12
13/**
14 * struct sprd_mux_ssel - Mux clock's source select bits in its register
15 * @shift: Bit offset of the divider in its register
16 * @width: Width of the divider field in its register
17 * @table: For some mux clocks, not all sources are used on some special
18 *	   chips, this matches the value of mux clock's register and the
19 *	   sources which are used for this mux clock
20 */
21struct sprd_mux_ssel {
22	u8		shift;
23	u8		width;
24	const u8	*table;
25};
26
27struct sprd_mux {
28	struct sprd_mux_ssel mux;
29	struct sprd_clk_common	common;
30};
31
32#define _SPRD_MUX_CLK(_shift, _width, _table)		\
33	{						\
34		.shift	= _shift,			\
35		.width	= _width,			\
36		.table	= _table,			\
37	}
38
39#define SPRD_MUX_CLK_TABLE(_struct, _name, _parents, _table,		\
40				     _reg, _shift, _width,		\
41				     _flags)				\
42	struct sprd_mux _struct = {					\
43		.mux	= _SPRD_MUX_CLK(_shift, _width, _table),	\
44		.common	= {						\
45			.regmap		= NULL,				\
46			.reg		= _reg,				\
47			.hw.init = CLK_HW_INIT_PARENTS(_name,		\
48						       _parents,	\
49						       &sprd_mux_ops,	\
50						       _flags),		\
51		}							\
52	}
53
54#define SPRD_MUX_CLK(_struct, _name, _parents, _reg,		\
55		     _shift, _width, _flags)			\
56	SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL,	\
57			   _reg, _shift, _width, _flags)
58
59static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
60{
61	struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
62
63	return container_of(common, struct sprd_mux, common);
64}
65
66extern const struct clk_ops sprd_mux_ops;
67
68u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
69			      const struct sprd_mux_ssel *mux);
70int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
71			       const struct sprd_mux_ssel *mux,
72			       u8 index);
73
74#endif /* _SPRD_MUX_H_ */