2 * Copyright (c) 2014 MediaTek Inc.
3 * Author: James Liao <jamesjj.liao@mediatek.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 #include <linux/of_address.h>
17 #include <linux/err.h>
19 #include <linux/slab.h>
20 #include <linux/delay.h>
21 #include <linux/clkdev.h>
22 #include <linux/mfd/syscon.h>
27 struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
30 struct clk_onecell_data *clk_data;
32 clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
36 clk_data->clks = kcalloc(clk_num, sizeof(*clk_data->clks), GFP_KERNEL);
40 clk_data->clk_num = clk_num;
42 for (i = 0; i < clk_num; i++)
43 clk_data->clks[i] = ERR_PTR(-ENOENT);
52 void mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
53 struct clk_onecell_data *clk_data)
58 for (i = 0; i < num; i++) {
59 const struct mtk_fixed_factor *ff = &clks[i];
61 clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
62 CLK_SET_RATE_PARENT, ff->mult, ff->div);
65 pr_err("Failed to register clk %s: %ld\n",
66 ff->name, PTR_ERR(clk));
71 clk_data->clks[ff->id] = clk;
75 int mtk_clk_register_gates(struct device_node *node, const struct mtk_gate *clks,
76 int num, struct clk_onecell_data *clk_data)
80 struct regmap *regmap;
85 regmap = syscon_node_to_regmap(node);
87 pr_err("Cannot find regmap for %s: %ld\n", node->full_name,
89 return PTR_ERR(regmap);
92 for (i = 0; i < num; i++) {
93 const struct mtk_gate *gate = &clks[i];
95 clk = mtk_clk_register_gate(gate->name, gate->parent_name,
100 gate->shift, gate->ops);
103 pr_err("Failed to register clk %s: %ld\n",
104 gate->name, PTR_ERR(clk));
108 clk_data->clks[gate->id] = clk;
114 struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
115 void __iomem *base, spinlock_t *lock)
118 struct clk_mux *mux = NULL;
119 struct clk_gate *gate = NULL;
120 struct clk_divider *div = NULL;
121 struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
122 const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
123 const char * const *parent_names;
128 if (mc->mux_shift >= 0) {
129 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
131 return ERR_PTR(-ENOMEM);
133 mux->reg = base + mc->mux_reg;
134 mux->mask = BIT(mc->mux_width) - 1;
135 mux->shift = mc->mux_shift;
139 mux_ops = &clk_mux_ops;
141 parent_names = mc->parent_names;
142 num_parents = mc->num_parents;
145 parent_names = &parent;
149 if (mc->gate_shift >= 0) {
150 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
156 gate->reg = base + mc->gate_reg;
157 gate->bit_idx = mc->gate_shift;
158 gate->flags = CLK_GATE_SET_TO_DISABLE;
162 gate_ops = &clk_gate_ops;
165 if (mc->divider_shift >= 0) {
166 div = kzalloc(sizeof(*div), GFP_KERNEL);
172 div->reg = base + mc->divider_reg;
173 div->shift = mc->divider_shift;
174 div->width = mc->divider_width;
178 div_ops = &clk_divider_ops;
181 clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
199 void mtk_clk_register_composites(const struct mtk_composite *mcs,
200 int num, void __iomem *base, spinlock_t *lock,
201 struct clk_onecell_data *clk_data)
206 for (i = 0; i < num; i++) {
207 const struct mtk_composite *mc = &mcs[i];
209 clk = mtk_clk_register_composite(mc, base, lock);
212 pr_err("Failed to register clk %s: %ld\n",
213 mc->name, PTR_ERR(clk));
218 clk_data->clks[mc->id] = clk;