1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Spreadtrum composite clock driver 4 // 5 // Copyright (C) 2017 Spreadtrum, Inc. 6 // Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com> 7 8 #include <linux/clk-provider.h> 9 10 #include "composite.h" 11 12 static int sprd_comp_determine_rate(struct clk_hw *hw, 13 struct clk_rate_request *req) 14 { 15 struct sprd_comp *cc = hw_to_sprd_comp(hw); 16 unsigned long rate; 17 18 rate = sprd_div_helper_round_rate(&cc->common, &cc->div, 19 req->rate, &req->best_parent_rate); 20 if (rate < 0) 21 return rate; 22 23 req->rate = rate; 24 return 0; 25 } 26 27 static unsigned long sprd_comp_recalc_rate(struct clk_hw *hw, 28 unsigned long parent_rate) 29 { 30 struct sprd_comp *cc = hw_to_sprd_comp(hw); 31 32 return sprd_div_helper_recalc_rate(&cc->common, &cc->div, parent_rate); 33 } 34 35 static int sprd_comp_set_rate(struct clk_hw *hw, unsigned long rate, 36 unsigned long parent_rate) 37 { 38 struct sprd_comp *cc = hw_to_sprd_comp(hw); 39 40 return sprd_div_helper_set_rate(&cc->common, &cc->div, 41 rate, parent_rate); 42 } 43 44 static u8 sprd_comp_get_parent(struct clk_hw *hw) 45 { 46 struct sprd_comp *cc = hw_to_sprd_comp(hw); 47 48 return sprd_mux_helper_get_parent(&cc->common, &cc->mux); 49 } 50 51 static int sprd_comp_set_parent(struct clk_hw *hw, u8 index) 52 { 53 struct sprd_comp *cc = hw_to_sprd_comp(hw); 54 55 return sprd_mux_helper_set_parent(&cc->common, &cc->mux, index); 56 } 57 58 const struct clk_ops sprd_comp_ops = { 59 .get_parent = sprd_comp_get_parent, 60 .set_parent = sprd_comp_set_parent, 61 62 .determine_rate = sprd_comp_determine_rate, 63 .recalc_rate = sprd_comp_recalc_rate, 64 .set_rate = sprd_comp_set_rate, 65 }; 66 EXPORT_SYMBOL_GPL(sprd_comp_ops); 67