1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/kernel.h> 7 #include <linux/bitops.h> 8 #include <linux/regmap.h> 9 #include <linux/export.h> 10 11 #include "clk-regmap-mux.h" 12 13 static inline struct clk_regmap_mux *to_clk_regmap_mux(struct clk_hw *hw) 14 { 15 return container_of(to_clk_regmap(hw), struct clk_regmap_mux, clkr); 16 } 17 18 static u8 mux_get_parent(struct clk_hw *hw) 19 { 20 struct clk_regmap_mux *mux = to_clk_regmap_mux(hw); 21 struct clk_regmap *clkr = to_clk_regmap(hw); 22 unsigned int mask = GENMASK(mux->width - 1, 0); 23 unsigned int val; 24 25 regmap_read(clkr->regmap, mux->reg, &val); 26 27 val >>= mux->shift; 28 val &= mask; 29 30 if (mux->parent_map) 31 return qcom_find_cfg_index(hw, mux->parent_map, val); 32 33 return val; 34 } 35 36 static int mux_set_parent(struct clk_hw *hw, u8 index) 37 { 38 struct clk_regmap_mux *mux = to_clk_regmap_mux(hw); 39 struct clk_regmap *clkr = to_clk_regmap(hw); 40 unsigned int mask = GENMASK(mux->width + mux->shift - 1, mux->shift); 41 unsigned int val; 42 43 if (mux->parent_map) 44 index = mux->parent_map[index].cfg; 45 46 val = index; 47 val <<= mux->shift; 48 49 return regmap_update_bits(clkr->regmap, mux->reg, mask, val); 50 } 51 52 const struct clk_ops clk_regmap_mux_closest_ops = { 53 .get_parent = mux_get_parent, 54 .set_parent = mux_set_parent, 55 .determine_rate = __clk_mux_determine_rate_closest, 56 }; 57 EXPORT_SYMBOL_GPL(clk_regmap_mux_closest_ops); 58