11802d0beSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21e17de90SSean Wang /* 31e17de90SSean Wang * Copyright (c) 2015 Linaro Ltd. 41e17de90SSean Wang * Author: Pi-Cheng Chen <pi-cheng.chen@linaro.org> 51e17de90SSean Wang */ 61e17de90SSean Wang 71e17de90SSean Wang #include <linux/clk-provider.h> 81e17de90SSean Wang #include <linux/mfd/syscon.h> 9*32b028fbSMiles Chen #include <linux/module.h> 101e17de90SSean Wang #include <linux/slab.h> 111e17de90SSean Wang 121e17de90SSean Wang #include "clk-mtk.h" 131e17de90SSean Wang #include "clk-cpumux.h" 141e17de90SSean Wang 151e17de90SSean Wang static inline struct mtk_clk_cpumux *to_mtk_clk_cpumux(struct clk_hw *_hw) 161e17de90SSean Wang { 171e17de90SSean Wang return container_of(_hw, struct mtk_clk_cpumux, hw); 181e17de90SSean Wang } 191e17de90SSean Wang 201e17de90SSean Wang static u8 clk_cpumux_get_parent(struct clk_hw *hw) 211e17de90SSean Wang { 221e17de90SSean Wang struct mtk_clk_cpumux *mux = to_mtk_clk_cpumux(hw); 231e17de90SSean Wang unsigned int val; 241e17de90SSean Wang 251e17de90SSean Wang regmap_read(mux->regmap, mux->reg, &val); 261e17de90SSean Wang 271e17de90SSean Wang val >>= mux->shift; 281e17de90SSean Wang val &= mux->mask; 291e17de90SSean Wang 301e17de90SSean Wang return val; 311e17de90SSean Wang } 321e17de90SSean Wang 331e17de90SSean Wang static int clk_cpumux_set_parent(struct clk_hw *hw, u8 index) 341e17de90SSean Wang { 351e17de90SSean Wang struct mtk_clk_cpumux *mux = to_mtk_clk_cpumux(hw); 361e17de90SSean Wang u32 mask, val; 371e17de90SSean Wang 381e17de90SSean Wang val = index << mux->shift; 391e17de90SSean Wang mask = mux->mask << mux->shift; 401e17de90SSean Wang 411e17de90SSean Wang return regmap_update_bits(mux->regmap, mux->reg, mask, val); 421e17de90SSean Wang } 431e17de90SSean Wang 441e17de90SSean Wang static const struct clk_ops clk_cpumux_ops = { 451e17de90SSean Wang .get_parent = clk_cpumux_get_parent, 461e17de90SSean Wang .set_parent = clk_cpumux_set_parent, 471e17de90SSean Wang }; 481e17de90SSean Wang 4928f1186aSStephen Boyd static struct clk * 501e17de90SSean Wang mtk_clk_register_cpumux(const struct mtk_composite *mux, 511e17de90SSean Wang struct regmap *regmap) 521e17de90SSean Wang { 531e17de90SSean Wang struct mtk_clk_cpumux *cpumux; 541e17de90SSean Wang struct clk *clk; 551e17de90SSean Wang struct clk_init_data init; 561e17de90SSean Wang 571e17de90SSean Wang cpumux = kzalloc(sizeof(*cpumux), GFP_KERNEL); 581e17de90SSean Wang if (!cpumux) 591e17de90SSean Wang return ERR_PTR(-ENOMEM); 601e17de90SSean Wang 611e17de90SSean Wang init.name = mux->name; 621e17de90SSean Wang init.ops = &clk_cpumux_ops; 631e17de90SSean Wang init.parent_names = mux->parent_names; 641e17de90SSean Wang init.num_parents = mux->num_parents; 651e17de90SSean Wang init.flags = mux->flags; 661e17de90SSean Wang 671e17de90SSean Wang cpumux->reg = mux->mux_reg; 681e17de90SSean Wang cpumux->shift = mux->mux_shift; 691e17de90SSean Wang cpumux->mask = BIT(mux->mux_width) - 1; 701e17de90SSean Wang cpumux->regmap = regmap; 711e17de90SSean Wang cpumux->hw.init = &init; 721e17de90SSean Wang 731e17de90SSean Wang clk = clk_register(NULL, &cpumux->hw); 741e17de90SSean Wang if (IS_ERR(clk)) 751e17de90SSean Wang kfree(cpumux); 761e17de90SSean Wang 771e17de90SSean Wang return clk; 781e17de90SSean Wang } 791e17de90SSean Wang 8028f1186aSStephen Boyd int mtk_clk_register_cpumuxes(struct device_node *node, 811e17de90SSean Wang const struct mtk_composite *clks, int num, 821e17de90SSean Wang struct clk_onecell_data *clk_data) 831e17de90SSean Wang { 841e17de90SSean Wang int i; 851e17de90SSean Wang struct clk *clk; 861e17de90SSean Wang struct regmap *regmap; 871e17de90SSean Wang 88197ee543SChun-Jie Chen regmap = device_node_to_regmap(node); 891e17de90SSean Wang if (IS_ERR(regmap)) { 9016673931SRob Herring pr_err("Cannot find regmap for %pOF: %ld\n", node, 911e17de90SSean Wang PTR_ERR(regmap)); 921e17de90SSean Wang return PTR_ERR(regmap); 931e17de90SSean Wang } 941e17de90SSean Wang 951e17de90SSean Wang for (i = 0; i < num; i++) { 961e17de90SSean Wang const struct mtk_composite *mux = &clks[i]; 971e17de90SSean Wang 981e17de90SSean Wang clk = mtk_clk_register_cpumux(mux, regmap); 991e17de90SSean Wang if (IS_ERR(clk)) { 1001e17de90SSean Wang pr_err("Failed to register clk %s: %ld\n", 1011e17de90SSean Wang mux->name, PTR_ERR(clk)); 1021e17de90SSean Wang continue; 1031e17de90SSean Wang } 1041e17de90SSean Wang 1051e17de90SSean Wang clk_data->clks[mux->id] = clk; 1061e17de90SSean Wang } 1071e17de90SSean Wang 1081e17de90SSean Wang return 0; 1091e17de90SSean Wang } 110*32b028fbSMiles Chen 111*32b028fbSMiles Chen MODULE_LICENSE("GPL"); 112