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_fixed_clks(const struct mtk_fixed_clk *clks,
53 int num, struct clk_onecell_data *clk_data)
58 for (i = 0; i < num; i++) {
59 const struct mtk_fixed_clk *rc = &clks[i];
61 clk = clk_register_fixed_rate(NULL, rc->name, rc->parent, 0,
65 pr_err("Failed to register clk %s: %ld\n",
66 rc->name, PTR_ERR(clk));
71 clk_data->clks[rc->id] = clk;
75 void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
76 int num, struct clk_onecell_data *clk_data)
81 for (i = 0; i < num; i++) {
82 const struct mtk_fixed_factor *ff = &clks[i];
84 clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
85 CLK_SET_RATE_PARENT, ff->mult, ff->div);
88 pr_err("Failed to register clk %s: %ld\n",
89 ff->name, PTR_ERR(clk));
94 clk_data->clks[ff->id] = clk;
98 int mtk_clk_register_gates(struct device_node *node,
99 const struct mtk_gate *clks,
100 int num, struct clk_onecell_data *clk_data)
104 struct regmap *regmap;
109 regmap = syscon_node_to_regmap(node);
110 if (IS_ERR(regmap)) {
111 pr_err("Cannot find regmap for %s: %ld\n", node->full_name,
113 return PTR_ERR(regmap);
116 for (i = 0; i < num; i++) {
117 const struct mtk_gate *gate = &clks[i];
119 clk = mtk_clk_register_gate(gate->name, gate->parent_name,
124 gate->shift, gate->ops);
127 pr_err("Failed to register clk %s: %ld\n",
128 gate->name, PTR_ERR(clk));
132 clk_data->clks[gate->id] = clk;
138 struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
139 void __iomem *base, spinlock_t *lock)
142 struct clk_mux *mux = NULL;
143 struct clk_gate *gate = NULL;
144 struct clk_divider *div = NULL;
145 struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
146 const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
147 const char * const *parent_names;
152 if (mc->mux_shift >= 0) {
153 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
155 return ERR_PTR(-ENOMEM);
157 mux->reg = base + mc->mux_reg;
158 mux->mask = BIT(mc->mux_width) - 1;
159 mux->shift = mc->mux_shift;
163 mux_ops = &clk_mux_ops;
165 parent_names = mc->parent_names;
166 num_parents = mc->num_parents;
169 parent_names = &parent;
173 if (mc->gate_shift >= 0) {
174 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
180 gate->reg = base + mc->gate_reg;
181 gate->bit_idx = mc->gate_shift;
182 gate->flags = CLK_GATE_SET_TO_DISABLE;
186 gate_ops = &clk_gate_ops;
189 if (mc->divider_shift >= 0) {
190 div = kzalloc(sizeof(*div), GFP_KERNEL);
196 div->reg = base + mc->divider_reg;
197 div->shift = mc->divider_shift;
198 div->width = mc->divider_width;
202 div_ops = &clk_divider_ops;
205 clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
225 void mtk_clk_register_composites(const struct mtk_composite *mcs,
226 int num, void __iomem *base, spinlock_t *lock,
227 struct clk_onecell_data *clk_data)
232 for (i = 0; i < num; i++) {
233 const struct mtk_composite *mc = &mcs[i];
235 clk = mtk_clk_register_composite(mc, base, lock);
238 pr_err("Failed to register clk %s: %ld\n",
239 mc->name, PTR_ERR(clk));
244 clk_data->clks[mc->id] = clk;