1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 // 3 // OWL divider clock driver 4 // 5 // Copyright (c) 2014 Actions Semi Inc. 6 // Author: David Liu <liuwei@actions-semi.com> 7 // 8 // Copyright (c) 2018 Linaro Ltd. 9 // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> 10 11 #ifndef _OWL_DIVIDER_H_ 12 #define _OWL_DIVIDER_H_ 13 14 #include "owl-common.h" 15 16 struct owl_divider_hw { 17 u32 reg; 18 u8 shift; 19 u8 width; 20 u8 div_flags; 21 struct clk_div_table *table; 22 }; 23 24 struct owl_divider { 25 struct owl_divider_hw div_hw; 26 struct owl_clk_common common; 27 }; 28 29 #define OWL_DIVIDER_HW(_reg, _shift, _width, _div_flags, _table) \ 30 { \ 31 .reg = _reg, \ 32 .shift = _shift, \ 33 .width = _width, \ 34 .div_flags = _div_flags, \ 35 .table = _table, \ 36 } 37 38 #define OWL_DIVIDER(_struct, _name, _parent, _reg, \ 39 _shift, _width, _table, _div_flags, _flags) \ 40 struct owl_divider _struct = { \ 41 .div_hw = OWL_DIVIDER_HW(_reg, _shift, _width, \ 42 _div_flags, _table), \ 43 .common = { \ 44 .regmap = NULL, \ 45 .hw.init = CLK_HW_INIT(_name, \ 46 _parent, \ 47 &owl_divider_ops, \ 48 _flags), \ 49 }, \ 50 } 51 52 static inline struct owl_divider *hw_to_owl_divider(const struct clk_hw *hw) 53 { 54 struct owl_clk_common *common = hw_to_owl_clk_common(hw); 55 56 return container_of(common, struct owl_divider, common); 57 } 58 59 long owl_divider_helper_round_rate(struct owl_clk_common *common, 60 const struct owl_divider_hw *div_hw, 61 unsigned long rate, 62 unsigned long *parent_rate); 63 64 unsigned long owl_divider_helper_recalc_rate(struct owl_clk_common *common, 65 const struct owl_divider_hw *div_hw, 66 unsigned long parent_rate); 67 68 int owl_divider_helper_set_rate(const struct owl_clk_common *common, 69 const struct owl_divider_hw *div_hw, 70 unsigned long rate, 71 unsigned long parent_rate); 72 73 extern const struct clk_ops owl_divider_ops; 74 75 #endif /* _OWL_DIVIDER_H_ */ 76