mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 06:04:14 +08:00
e3f05d3b18
This is a feature that can also be found in sprd composite clocks, provide a bunch of helpers that can be reused later on. Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
// 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);
|
|
}
|
|
|
|
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_ */
|