1 /* SPDX-License-Identifier: GPL-2.0 */ 2 // 3 // Spreadtrum divider clock driver 4 // 5 // Copyright (C) 2017 Spreadtrum, Inc. 6 // Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com> 7 8 #ifndef _SPRD_DIV_H_ 9 #define _SPRD_DIV_H_ 10 11 #include "common.h" 12 13 /** 14 * struct sprd_div_internal - Internal divider description 15 * @shift: Bit offset of the divider in its register 16 * @width: Width of the divider field in its register 17 * 18 * That structure represents a single divider, and is meant to be 19 * embedded in other structures representing the various clock 20 * classes. 21 */ 22 struct sprd_div_internal { 23 s32 offset; 24 u8 shift; 25 u8 width; 26 }; 27 28 #define _SPRD_DIV_CLK(_offset, _shift, _width) \ 29 { \ 30 .offset = _offset, \ 31 .shift = _shift, \ 32 .width = _width, \ 33 } 34 35 struct sprd_div { 36 struct sprd_div_internal div; 37 struct sprd_clk_common common; 38 }; 39 40 #define SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, _offset, \ 41 _shift, _width, _flags, _fn) \ 42 struct sprd_div _struct = { \ 43 .div = _SPRD_DIV_CLK(_offset, _shift, _width), \ 44 .common = { \ 45 .regmap = NULL, \ 46 .reg = _reg, \ 47 .hw.init = _fn(_name, _parent, \ 48 &sprd_div_ops, _flags), \ 49 } \ 50 } 51 52 #define SPRD_DIV_CLK(_struct, _name, _parent, _reg, \ 53 _shift, _width, _flags) \ 54 SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0, \ 55 _shift, _width, _flags, CLK_HW_INIT) 56 57 #define SPRD_DIV_CLK_FW_NAME(_struct, _name, _parent, _reg, \ 58 _shift, _width, _flags) \ 59 SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0, \ 60 _shift, _width, _flags, CLK_HW_INIT_FW_NAME) 61 62 #define SPRD_DIV_CLK_HW(_struct, _name, _parent, _reg, \ 63 _shift, _width, _flags) \ 64 SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, 0x0, \ 65 _shift, _width, _flags, CLK_HW_INIT_HW) 66 67 static inline struct sprd_div *hw_to_sprd_div(const struct clk_hw *hw) 68 { 69 struct sprd_clk_common *common = hw_to_sprd_clk_common(hw); 70 71 return container_of(common, struct sprd_div, common); 72 } 73 74 unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common, 75 const struct sprd_div_internal *div, 76 unsigned long parent_rate); 77 78 int sprd_div_helper_set_rate(const struct sprd_clk_common *common, 79 const struct sprd_div_internal *div, 80 unsigned long rate, 81 unsigned long parent_rate); 82 83 extern const struct clk_ops sprd_div_ops; 84 85 #endif /* _SPRD_DIV_H_ */ 86