Release 4.16 drivers/clk/sprd/div.h

// SPDX-License-Identifier: GPL-2.0
//
// Spreadtrum divider clock driver
//
// Copyright (C) 2017 Spreadtrum, Inc.
// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>

#ifndef _SPRD_DIV_H_

#define _SPRD_DIV_H_

#include "common.h"

/**
 * struct sprd_div_internal - Internal divider description
 * @shift: Bit offset of the divider in its register
 * @width: Width of the divider field in its register
 *
 * That structure represents a single divider, and is meant to be
 * embedded in other structures representing the various clock
 * classes.
 */

struct sprd_div_internal {
	
u8	shift;
	
u8	width;
};


#define _SPRD_DIV_CLK(_shift, _width)	\
	{                               \
                .shift  = _shift,       \
                .width  = _width,       \
        }


struct sprd_div {
	
struct sprd_div_internal	div;
	
struct sprd_clk_common	common;
};

#define SPRD_DIV_CLK(_struct, _name, _parent, _reg,                       \
			
_shift, _width, _flags)				\
	struct sprd_div _struct = {                                     \
                .div    = _SPRD_DIV_CLK(_shift, _width),                \
                .common = {                                             \
                        .regmap         = NULL,                         \
                        .reg            = _reg,                         \
                        .hw.init        = CLK_HW_INIT(_name,            \
                                                      _parent,          \
                                                      &sprd_div_ops,    \
                                                      _flags),          \
                }                                                       \
        }



static inline struct sprd_div *hw_to_sprd_div(const struct clk_hw *hw)
{
	struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);

	return container_of(common, struct sprd_div, common);
}

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long sprd_div_helper_round_rate(struct sprd_clk_common *common,
				const struct sprd_div_internal *div,
				unsigned long rate,
				unsigned long *parent_rate);

unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common,
					  const struct sprd_div_internal *div,
					  unsigned long parent_rate);

int sprd_div_helper_set_rate(const struct sprd_clk_common *common,
			     const struct sprd_div_internal *div,
			     unsigned long rate,
			     unsigned long parent_rate);

extern const struct clk_ops sprd_div_ops;

#endif /* _SPRD_DIV_H_ */
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Directory: drivers/clk/sprd

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