diff options
Diffstat (limited to 'drivers/clk/sunxi-ng/ccu_div.h')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu_div.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_div.h b/drivers/clk/sunxi-ng/ccu_div.h new file mode 100644 index 000000000..f3a5028dc --- /dev/null +++ b/drivers/clk/sunxi-ng/ccu_div.h @@ -0,0 +1,186 @@ +/* + * 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; + unsigned int fixed_post_div; +}; + +#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_ */ |