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/* 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 {
s32 offset;
u8 shift;
u8 width;
};
#define _SPRD_DIV_CLK(_offset, _shift, _width) \
{ \
.offset = _offset, \
.shift = _shift, \
.width = _width, \
}
struct sprd_div {
struct sprd_div_internal div;
struct sprd_clk_common common;
};
#define SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, _offset, \
_shift, _width, _flags, _fn) \
struct sprd_div _struct = { \
.div = _SPRD_DIV_CLK(_offset, _shift, _width), \
.common = { \
.regmap = NULL, \
.reg = _reg, \
.hw.init = _fn(_name, _parent, \
&sprd_div_ops, _flags), \
} \
}
#define SPRD_DIV_CLK(_struct, _name, _parent, _reg, \
_shift, _width, _flags) \
SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0, \
_shift, _width, _flags, CLK_HW_INIT)
#define SPRD_DIV_CLK_FW_NAME(_struct, _name, _parent, _reg, \
_shift, _width, _flags) \
SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0, \
_shift, _width, _flags, CLK_HW_INIT_FW_NAME)
#define SPRD_DIV_CLK_HW(_struct, _name, _parent, _reg, \
_shift, _width, _flags) \
SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0, \
_shift, _width, _flags, CLK_HW_INIT_HW)
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);
}
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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