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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_factors(const struct mtk_fixed_factor *clks, int num,
53 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_factor *ff = &clks[i];
60
61 clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
62 CLK_SET_RATE_PARENT, ff->mult, ff->div);
63
64 if (IS_ERR(clk)) {
65 pr_err("Failed to register clk %s: %ld\n",
66 ff->name, PTR_ERR(clk));
67 continue;
68 }
69
70 if (clk_data)
71 clk_data->clks[ff->id] = clk;
72 }
73}
74
75int mtk_clk_register_gates(struct device_node *node, const struct mtk_gate *clks,
76 int num, struct clk_onecell_data *clk_data)
77{
78 int i;
79 struct clk *clk;
80 struct regmap *regmap;
81
82 if (!clk_data)
83 return -ENOMEM;
84
85 regmap = syscon_node_to_regmap(node);
86 if (IS_ERR(regmap)) {
87 pr_err("Cannot find regmap for %s: %ld\n", node->full_name,
88 PTR_ERR(regmap));
89 return PTR_ERR(regmap);
90 }
91
92 for (i = 0; i < num; i++) {
93 const struct mtk_gate *gate = &clks[i];
94
95 clk = mtk_clk_register_gate(gate->name, gate->parent_name,
96 regmap,
97 gate->regs->set_ofs,
98 gate->regs->clr_ofs,
99 gate->regs->sta_ofs,
100 gate->shift, gate->ops);
101
102 if (IS_ERR(clk)) {
103 pr_err("Failed to register clk %s: %ld\n",
104 gate->name, PTR_ERR(clk));
105 continue;
106 }
107
108 clk_data->clks[gate->id] = clk;
109 }
110
111 return 0;
112}
113
114struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
115 void __iomem *base, spinlock_t *lock)
116{
117 struct clk *clk;
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;
124 const char *parent;
125 int num_parents;
126 int ret;
127
128 if (mc->mux_shift >= 0) {
129 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
130 if (!mux)
131 return ERR_PTR(-ENOMEM);
132
133 mux->reg = base + mc->mux_reg;
134 mux->mask = BIT(mc->mux_width) - 1;
135 mux->shift = mc->mux_shift;
136 mux->lock = lock;
137
138 mux_hw = &mux->hw;
139 mux_ops = &clk_mux_ops;
140
141 parent_names = mc->parent_names;
142 num_parents = mc->num_parents;
143 } else {
144 parent = mc->parent;
145 parent_names = &parent;
146 num_parents = 1;
147 }
148
149 if (mc->gate_shift >= 0) {
150 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
151 if (!gate) {
152 ret = -ENOMEM;
153 goto err_out;
154 }
155
156 gate->reg = base + mc->gate_reg;
157 gate->bit_idx = mc->gate_shift;
158 gate->flags = CLK_GATE_SET_TO_DISABLE;
159 gate->lock = lock;
160
161 gate_hw = &gate->hw;
162 gate_ops = &clk_gate_ops;
163 }
164
165 if (mc->divider_shift >= 0) {
166 div = kzalloc(sizeof(*div), GFP_KERNEL);
167 if (!div) {
168 ret = -ENOMEM;
169 goto err_out;
170 }
171
172 div->reg = base + mc->divider_reg;
173 div->shift = mc->divider_shift;
174 div->width = mc->divider_width;
175 div->lock = lock;
176
177 div_hw = &div->hw;
178 div_ops = &clk_divider_ops;
179 }
180
181 clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
182 mux_hw, mux_ops,
183 div_hw, div_ops,
184 gate_hw, gate_ops,
185 mc->flags);
186
187 if (IS_ERR(clk)) {
188 kfree(gate);
189 kfree(mux);
190 }
191
192 return clk;
193err_out:
194 kfree(mux);
195
196 return ERR_PTR(ret);
197}
198
199void 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)
202{
203 struct clk *clk;
204 int i;
205
206 for (i = 0; i < num; i++) {
207 const struct mtk_composite *mc = &mcs[i];
208
209 clk = mtk_clk_register_composite(mc, base, lock);
210
211 if (IS_ERR(clk)) {
212 pr_err("Failed to register clk %s: %ld\n",
213 mc->name, PTR_ERR(clk));
214 continue;
215 }
216
217 if (clk_data)
218 clk_data->clks[mc->id] = clk;
219 }
220}
221
