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/*
* Copyright (c) 2016 Maxime Ripard. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _CCU_DIV_H_
#define _CCU_DIV_H_
#include <linux/clk-provider.h>
#include "ccu_common.h"
#include "ccu_mux.h"
/**
* struct ccu_div_internal - Internal divider description
* @shift: Bit offset of the divider in its register
* @width: Width of the divider field in its register
* @max: Maximum value allowed for that divider. This is the
* arithmetic value, not the maximum value to be set in the
* register.
* @flags: clk_divider flags to apply on this divider
* @table: Divider table pointer (if applicable)
*
* That structure represents a single divider, and is meant to be
* embedded in other structures representing the various clock
* classes.
*
* It is basically a wrapper around the clk_divider functions
* arguments.
*/
struct ccu_div_internal {
u8 shift;
u8 width;
u32 max;
u32 offset;
u32 flags;
struct clk_div_table *table;
};
#define _SUNXI_CCU_DIV_TABLE_FLAGS(_shift, _width, _table, _flags) \
{ \
.shift = _shift, \
.width = _width, \
.flags = _flags, \
.table = _table, \
}
#define _SUNXI_CCU_DIV_TABLE(_shift, _width, _table) \
_SUNXI_CCU_DIV_TABLE_FLAGS(_shift, _width, _table, 0)
#define _SUNXI_CCU_DIV_OFFSET_MAX_FLAGS(_shift, _width, _off, _max, _flags) \
{ \
.shift = _shift, \
.width = _width, \
.flags = _flags, \
.max = _max, \
.offset = _off, \
}
#define _SUNXI_CCU_DIV_MAX_FLAGS(_shift, _width, _max, _flags) \
_SUNXI_CCU_DIV_OFFSET_MAX_FLAGS(_shift, _width, 1, _max, _flags)
#define _SUNXI_CCU_DIV_FLAGS(_shift, _width, _flags) \
_SUNXI_CCU_DIV_MAX_FLAGS(_shift, _width, 0, _flags)
#define _SUNXI_CCU_DIV_MAX(_shift, _width, _max) \
_SUNXI_CCU_DIV_MAX_FLAGS(_shift, _width, _max, 0)
#define _SUNXI_CCU_DIV_OFFSET(_shift, _width, _offset) \
_SUNXI_CCU_DIV_OFFSET_MAX_FLAGS(_shift, _width, _offset, 0, 0)
#define _SUNXI_CCU_DIV(_shift, _width) \
_SUNXI_CCU_DIV_FLAGS(_shift, _width, 0)
struct ccu_div {
u32 enable;
struct ccu_div_internal div;
struct ccu_mux_internal mux;
struct ccu_common common;
};
#define SUNXI_CCU_DIV_TABLE_WITH_GATE(_struct, _name, _parent, _reg, \
_shift, _width, \
_table, _gate, _flags) \
struct ccu_div _struct = { \
.div = _SUNXI_CCU_DIV_TABLE(_shift, _width, \
_table), \
.enable = _gate, \
.common = { \
.reg = _reg, \
.hw.init = CLK_HW_INIT(_name, \
_parent, \
&ccu_div_ops, \
_flags), \
} \
}
#define SUNXI_CCU_DIV_TABLE(_struct, _name, _parent, _reg, \
_shift, _width, \
_table, _flags) \
SUNXI_CCU_DIV_TABLE_WITH_GATE(_struct, _name, _parent, _reg, \
_shift, _width, _table, 0, \
_flags)
#define SUNXI_CCU_M_WITH_MUX_TABLE_GATE(_struct, _name, \
_parents, _table, \
_reg, \
_mshift, _mwidth, \
_muxshift, _muxwidth, \
_gate, _flags) \
struct ccu_div _struct = { \
.enable = _gate, \
.div = _SUNXI_CCU_DIV(_mshift, _mwidth), \
.mux = _SUNXI_CCU_MUX_TABLE(_muxshift, _muxwidth, _table), \
.common = { \
.reg = _reg, \
.hw.init = CLK_HW_INIT_PARENTS(_name, \
_parents, \
&ccu_div_ops, \
_flags), \
}, \
}
#define SUNXI_CCU_M_WITH_MUX_GATE(_struct, _name, _parents, _reg, \
_mshift, _mwidth, _muxshift, _muxwidth, \
_gate, _flags) \
SUNXI_CCU_M_WITH_MUX_TABLE_GATE(_struct, _name, \
_parents, NULL, \
_reg, _mshift, _mwidth, \
_muxshift, _muxwidth, \
_gate, _flags)
#define SUNXI_CCU_M_WITH_MUX(_struct, _name, _parents, _reg, \
_mshift, _mwidth, _muxshift, _muxwidth, \
_flags) \
SUNXI_CCU_M_WITH_MUX_TABLE_GATE(_struct, _name, \
_parents, NULL, \
_reg, _mshift, _mwidth, \
_muxshift, _muxwidth, \
0, _flags)
#define SUNXI_CCU_M_WITH_GATE(_struct, _name, _parent, _reg, \
_mshift, _mwidth, _gate, \
_flags) \
struct ccu_div _struct = { \
.enable = _gate, \
.div = _SUNXI_CCU_DIV(_mshift, _mwidth), \
.common = { \
.reg = _reg, \
.hw.init = CLK_HW_INIT(_name, \
_parent, \
&ccu_div_ops, \
_flags), \
}, \
}
#define SUNXI_CCU_M(_struct, _name, _parent, _reg, _mshift, _mwidth, \
_flags) \
SUNXI_CCU_M_WITH_GATE(_struct, _name, _parent, _reg, \
_mshift, _mwidth, 0, _flags)
static inline struct ccu_div *hw_to_ccu_div(struct clk_hw *hw)
{
struct ccu_common *common = hw_to_ccu_common(hw);
return container_of(common, struct ccu_div, common);
}
extern const struct clk_ops ccu_div_ops;
#endif /* _CCU_DIV_H_ */
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