blob: bb30f7063569d1c67a3dbc27c87744742a3b898f [file] [log] [blame]
James Liao9741b1a2015-04-23 10:35:39 +02001/*
2 * Copyright (c) 2014 MediaTek Inc.
3 * Author: James Liao <jamesjj.liao@mediatek.com>
4 *
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.
8 *
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.
13 */
14
15#include <linux/of.h>
16#include <linux/of_address.h>
17#include <linux/err.h>
18#include <linux/io.h>
19#include <linux/slab.h>
20#include <linux/delay.h>
21#include <linux/clkdev.h>
22#include <linux/mfd/syscon.h>
23
24#include "clk-mtk.h"
25#include "clk-gate.h"
26
James Liao928f3bf2016-08-16 15:30:21 +080027struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
James Liao9741b1a2015-04-23 10:35:39 +020028{
29 int i;
30 struct clk_onecell_data *clk_data;
31
32 clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
33 if (!clk_data)
34 return NULL;
35
36 clk_data->clks = kcalloc(clk_num, sizeof(*clk_data->clks), GFP_KERNEL);
37 if (!clk_data->clks)
38 goto err_out;
39
40 clk_data->clk_num = clk_num;
41
42 for (i = 0; i < clk_num; i++)
43 clk_data->clks[i] = ERR_PTR(-ENOENT);
44
45 return clk_data;
46err_out:
47 kfree(clk_data);
48
49 return NULL;
50}
51
James Liao928f3bf2016-08-16 15:30:21 +080052void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
James Liao4fa04382015-07-10 11:39:15 +080053 int num, struct clk_onecell_data *clk_data)
54{
55 int i;
56 struct clk *clk;
57
58 for (i = 0; i < num; i++) {
59 const struct mtk_fixed_clk *rc = &clks[i];
60
Stephen Boyd3d08f152016-03-01 10:59:50 -080061 clk = clk_register_fixed_rate(NULL, rc->name, rc->parent, 0,
62 rc->rate);
James Liao4fa04382015-07-10 11:39:15 +080063
64 if (IS_ERR(clk)) {
65 pr_err("Failed to register clk %s: %ld\n",
66 rc->name, PTR_ERR(clk));
67 continue;
68 }
69
70 if (clk_data)
71 clk_data->clks[rc->id] = clk;
72 }
73}
74
James Liao928f3bf2016-08-16 15:30:21 +080075void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
James Liaoe02940f2015-07-28 15:37:34 +080076 int num, struct clk_onecell_data *clk_data)
James Liao9741b1a2015-04-23 10:35:39 +020077{
78 int i;
79 struct clk *clk;
80
81 for (i = 0; i < num; i++) {
82 const struct mtk_fixed_factor *ff = &clks[i];
83
84 clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
85 CLK_SET_RATE_PARENT, ff->mult, ff->div);
86
87 if (IS_ERR(clk)) {
88 pr_err("Failed to register clk %s: %ld\n",
89 ff->name, PTR_ERR(clk));
90 continue;
91 }
92
93 if (clk_data)
94 clk_data->clks[ff->id] = clk;
95 }
96}
97
James Liao928f3bf2016-08-16 15:30:21 +080098int mtk_clk_register_gates(struct device_node *node,
James Liaoe02940f2015-07-28 15:37:34 +080099 const struct mtk_gate *clks,
James Liao9741b1a2015-04-23 10:35:39 +0200100 int num, struct clk_onecell_data *clk_data)
101{
102 int i;
103 struct clk *clk;
104 struct regmap *regmap;
105
106 if (!clk_data)
107 return -ENOMEM;
108
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,
112 PTR_ERR(regmap));
113 return PTR_ERR(regmap);
114 }
115
116 for (i = 0; i < num; i++) {
117 const struct mtk_gate *gate = &clks[i];
118
119 clk = mtk_clk_register_gate(gate->name, gate->parent_name,
120 regmap,
121 gate->regs->set_ofs,
122 gate->regs->clr_ofs,
123 gate->regs->sta_ofs,
124 gate->shift, gate->ops);
125
126 if (IS_ERR(clk)) {
127 pr_err("Failed to register clk %s: %ld\n",
128 gate->name, PTR_ERR(clk));
129 continue;
130 }
131
132 clk_data->clks[gate->id] = clk;
133 }
134
135 return 0;
136}
137
James Liao928f3bf2016-08-16 15:30:21 +0800138struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
James Liao9741b1a2015-04-23 10:35:39 +0200139 void __iomem *base, spinlock_t *lock)
140{
141 struct clk *clk;
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;
148 const char *parent;
149 int num_parents;
150 int ret;
151
152 if (mc->mux_shift >= 0) {
153 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
154 if (!mux)
155 return ERR_PTR(-ENOMEM);
156
157 mux->reg = base + mc->mux_reg;
158 mux->mask = BIT(mc->mux_width) - 1;
159 mux->shift = mc->mux_shift;
160 mux->lock = lock;
161
162 mux_hw = &mux->hw;
163 mux_ops = &clk_mux_ops;
164
165 parent_names = mc->parent_names;
166 num_parents = mc->num_parents;
167 } else {
168 parent = mc->parent;
169 parent_names = &parent;
170 num_parents = 1;
171 }
172
173 if (mc->gate_shift >= 0) {
174 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
175 if (!gate) {
176 ret = -ENOMEM;
177 goto err_out;
178 }
179
180 gate->reg = base + mc->gate_reg;
181 gate->bit_idx = mc->gate_shift;
182 gate->flags = CLK_GATE_SET_TO_DISABLE;
183 gate->lock = lock;
184
185 gate_hw = &gate->hw;
186 gate_ops = &clk_gate_ops;
187 }
188
189 if (mc->divider_shift >= 0) {
190 div = kzalloc(sizeof(*div), GFP_KERNEL);
191 if (!div) {
192 ret = -ENOMEM;
193 goto err_out;
194 }
195
196 div->reg = base + mc->divider_reg;
197 div->shift = mc->divider_shift;
198 div->width = mc->divider_width;
199 div->lock = lock;
200
201 div_hw = &div->hw;
202 div_ops = &clk_divider_ops;
203 }
204
205 clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
206 mux_hw, mux_ops,
207 div_hw, div_ops,
208 gate_hw, gate_ops,
209 mc->flags);
210
211 if (IS_ERR(clk)) {
James Liao49742592016-01-08 16:15:33 +0800212 ret = PTR_ERR(clk);
213 goto err_out;
James Liao9741b1a2015-04-23 10:35:39 +0200214 }
215
216 return clk;
217err_out:
James Liao49742592016-01-08 16:15:33 +0800218 kfree(div);
219 kfree(gate);
James Liao9741b1a2015-04-23 10:35:39 +0200220 kfree(mux);
221
222 return ERR_PTR(ret);
223}
224
James Liao928f3bf2016-08-16 15:30:21 +0800225void mtk_clk_register_composites(const struct mtk_composite *mcs,
James Liao9741b1a2015-04-23 10:35:39 +0200226 int num, void __iomem *base, spinlock_t *lock,
227 struct clk_onecell_data *clk_data)
228{
229 struct clk *clk;
230 int i;
231
232 for (i = 0; i < num; i++) {
233 const struct mtk_composite *mc = &mcs[i];
234
235 clk = mtk_clk_register_composite(mc, base, lock);
236
237 if (IS_ERR(clk)) {
238 pr_err("Failed to register clk %s: %ld\n",
239 mc->name, PTR_ERR(clk));
240 continue;
241 }
242
243 if (clk_data)
244 clk_data->clks[mc->id] = clk;
245 }
246}