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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
27struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
28{
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
52void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
53 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
61 if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[rc->id]))
62 continue;
63
64 clk = clk_register_fixed_rate(NULL, rc->name, rc->parent, 0,
65 rc->rate);
66
67 if (IS_ERR(clk)) {
68 pr_err("Failed to register clk %s: %ld\n",
69 rc->name, PTR_ERR(clk));
70 continue;
71 }
72
73 if (clk_data)
74 clk_data->clks[rc->id] = clk;
75 }
76}
77
78void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
79 int num, struct clk_onecell_data *clk_data)
80{
81 int i;
82 struct clk *clk;
83
84 for (i = 0; i < num; i++) {
85 const struct mtk_fixed_factor *ff = &clks[i];
86
87 if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[ff->id]))
88 continue;
89
90 clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
91 CLK_SET_RATE_PARENT, ff->mult, ff->div);
92
93 if (IS_ERR(clk)) {
94 pr_err("Failed to register clk %s: %ld\n",
95 ff->name, PTR_ERR(clk));
96 continue;
97 }
98
99 if (clk_data)
100 clk_data->clks[ff->id] = clk;
101 }
102}
103
104int mtk_clk_register_gates(struct device_node *node,
105 const struct mtk_gate *clks,
106 int num, struct clk_onecell_data *clk_data)
107{
108 int i;
109 struct clk *clk;
110 struct regmap *regmap;
111
112 if (!clk_data)
113 return -ENOMEM;
114
115 regmap = syscon_node_to_regmap(node);
116 if (IS_ERR(regmap)) {
117 pr_err("Cannot find regmap for %pOF: %ld\n", node,
118 PTR_ERR(regmap));
119 return PTR_ERR(regmap);
120 }
121
122 for (i = 0; i < num; i++) {
123 const struct mtk_gate *gate = &clks[i];
124
125 if (!IS_ERR_OR_NULL(clk_data->clks[gate->id]))
126 continue;
127
128 clk = mtk_clk_register_gate(gate->name, gate->parent_name,
129 regmap,
130 gate->regs->set_ofs,
131 gate->regs->clr_ofs,
132 gate->regs->sta_ofs,
133 gate->shift, gate->ops);
134
135 if (IS_ERR(clk)) {
136 pr_err("Failed to register clk %s: %ld\n",
137 gate->name, PTR_ERR(clk));
138 continue;
139 }
140
141 clk_data->clks[gate->id] = clk;
142 }
143
144 return 0;
145}
146
147struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
148 void __iomem *base, spinlock_t *lock)
149{
150 struct clk *clk;
151 struct clk_mux *mux = NULL;
152 struct clk_gate *gate = NULL;
153 struct clk_divider *div = NULL;
154 struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
155 const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
156 const char * const *parent_names;
157 const char *parent;
158 int num_parents;
159 int ret;
160
161 if (mc->mux_shift >= 0) {
162 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
163 if (!mux)
164 return ERR_PTR(-ENOMEM);
165
166 mux->reg = base + mc->mux_reg;
167 mux->mask = BIT(mc->mux_width) - 1;
168 mux->shift = mc->mux_shift;
169 mux->lock = lock;
170
171 mux_hw = &mux->hw;
172 mux_ops = &clk_mux_ops;
173
174 parent_names = mc->parent_names;
175 num_parents = mc->num_parents;
176 } else {
177 parent = mc->parent;
178 parent_names = &parent;
179 num_parents = 1;
180 }
181
182 if (mc->gate_shift >= 0) {
183 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
184 if (!gate) {
185 ret = -ENOMEM;
186 goto err_out;
187 }
188
189 gate->reg = base + mc->gate_reg;
190 gate->bit_idx = mc->gate_shift;
191 gate->flags = CLK_GATE_SET_TO_DISABLE;
192 gate->lock = lock;
193
194 gate_hw = &gate->hw;
195 gate_ops = &clk_gate_ops;
196 }
197
198 if (mc->divider_shift >= 0) {
199 div = kzalloc(sizeof(*div), GFP_KERNEL);
200 if (!div) {
201 ret = -ENOMEM;
202 goto err_out;
203 }
204
205 div->reg = base + mc->divider_reg;
206 div->shift = mc->divider_shift;
207 div->width = mc->divider_width;
208 div->lock = lock;
209
210 div_hw = &div->hw;
211 div_ops = &clk_divider_ops;
212 }
213
214 clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
215 mux_hw, mux_ops,
216 div_hw, div_ops,
217 gate_hw, gate_ops,
218 mc->flags);
219
220 if (IS_ERR(clk)) {
221 ret = PTR_ERR(clk);
222 goto err_out;
223 }
224
225 return clk;
226err_out:
227 kfree(div);
228 kfree(gate);
229 kfree(mux);
230
231 return ERR_PTR(ret);
232}
233
234void mtk_clk_register_composites(const struct mtk_composite *mcs,
235 int num, void __iomem *base, spinlock_t *lock,
236 struct clk_onecell_data *clk_data)
237{
238 struct clk *clk;
239 int i;
240
241 for (i = 0; i < num; i++) {
242 const struct mtk_composite *mc = &mcs[i];
243
244 if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[mc->id]))
245 continue;
246
247 clk = mtk_clk_register_composite(mc, base, lock);
248
249 if (IS_ERR(clk)) {
250 pr_err("Failed to register clk %s: %ld\n",
251 mc->name, PTR_ERR(clk));
252 continue;
253 }
254
255 if (clk_data)
256 clk_data->clks[mc->id] = clk;
257 }
258}
259
260void mtk_clk_register_dividers(const struct mtk_clk_divider *mcds,
261 int num, void __iomem *base, spinlock_t *lock,
262 struct clk_onecell_data *clk_data)
263{
264 struct clk *clk;
265 int i;
266
267 for (i = 0; i < num; i++) {
268 const struct mtk_clk_divider *mcd = &mcds[i];
269
270 if (clk_data && !IS_ERR_OR_NULL(clk_data->clks[mcd->id]))
271 continue;
272
273 clk = clk_register_divider(NULL, mcd->name, mcd->parent_name,
274 mcd->flags, base + mcd->div_reg, mcd->div_shift,
275 mcd->div_width, mcd->clk_divider_flags, lock);
276
277 if (IS_ERR(clk)) {
278 pr_err("Failed to register clk %s: %ld\n",
279 mcd->name, PTR_ERR(clk));
280 continue;
281 }
282
283 if (clk_data)
284 clk_data->clks[mcd->id] = clk;
285 }
286}
287
