1
2
3
4
5
6
7
8
9
10
11
12
13
14#include <linux/export.h>
15#include <linux/module.h>
16#include <linux/regmap.h>
17#include <linux/platform_device.h>
18#include <linux/clk-provider.h>
19#include <linux/reset-controller.h>
20#include <linux/of.h>
21
22#include "common.h"
23#include "clk-rcg.h"
24#include "clk-regmap.h"
25#include "reset.h"
26#include "gdsc.h"
27
28struct qcom_cc {
29 struct qcom_reset_controller reset;
30 struct clk_onecell_data data;
31 struct clk *clks[];
32};
33
34const
35struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, unsigned long rate)
36{
37 if (!f)
38 return NULL;
39
40 for (; f->freq; f++)
41 if (rate <= f->freq)
42 return f;
43
44
45 return f - 1;
46}
47EXPORT_SYMBOL_GPL(qcom_find_freq);
48
49int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map, u8 src)
50{
51 int i, num_parents = clk_hw_get_num_parents(hw);
52
53 for (i = 0; i < num_parents; i++)
54 if (src == map[i].src)
55 return i;
56
57 return -ENOENT;
58}
59EXPORT_SYMBOL_GPL(qcom_find_src_index);
60
61struct regmap *
62qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
63{
64 void __iomem *base;
65 struct resource *res;
66 struct device *dev = &pdev->dev;
67
68 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
69 base = devm_ioremap_resource(dev, res);
70 if (IS_ERR(base))
71 return ERR_CAST(base);
72
73 return devm_regmap_init_mmio(dev, base, desc->config);
74}
75EXPORT_SYMBOL_GPL(qcom_cc_map);
76
77static void qcom_cc_del_clk_provider(void *data)
78{
79 of_clk_del_provider(data);
80}
81
82static void qcom_cc_reset_unregister(void *data)
83{
84 reset_controller_unregister(data);
85}
86
87static void qcom_cc_gdsc_unregister(void *data)
88{
89 gdsc_unregister(data);
90}
91
92
93
94
95
96
97static int _qcom_cc_register_board_clk(struct device *dev, const char *path,
98 const char *name, unsigned long rate,
99 bool add_factor)
100{
101 struct device_node *node = NULL;
102 struct device_node *clocks_node;
103 struct clk_fixed_factor *factor;
104 struct clk_fixed_rate *fixed;
105 struct clk *clk;
106 struct clk_init_data init_data = { };
107
108 clocks_node = of_find_node_by_path("/clocks");
109 if (clocks_node)
110 node = of_find_node_by_name(clocks_node, path);
111 of_node_put(clocks_node);
112
113 if (!node) {
114 fixed = devm_kzalloc(dev, sizeof(*fixed), GFP_KERNEL);
115 if (!fixed)
116 return -EINVAL;
117
118 fixed->fixed_rate = rate;
119 fixed->hw.init = &init_data;
120
121 init_data.name = path;
122 init_data.ops = &clk_fixed_rate_ops;
123
124 clk = devm_clk_register(dev, &fixed->hw);
125 if (IS_ERR(clk))
126 return PTR_ERR(clk);
127 }
128 of_node_put(node);
129
130 if (add_factor) {
131 factor = devm_kzalloc(dev, sizeof(*factor), GFP_KERNEL);
132 if (!factor)
133 return -EINVAL;
134
135 factor->mult = factor->div = 1;
136 factor->hw.init = &init_data;
137
138 init_data.name = name;
139 init_data.parent_names = &path;
140 init_data.num_parents = 1;
141 init_data.flags = 0;
142 init_data.ops = &clk_fixed_factor_ops;
143
144 clk = devm_clk_register(dev, &factor->hw);
145 if (IS_ERR(clk))
146 return PTR_ERR(clk);
147 }
148
149 return 0;
150}
151
152int qcom_cc_register_board_clk(struct device *dev, const char *path,
153 const char *name, unsigned long rate)
154{
155 bool add_factor = true;
156 struct device_node *node;
157
158
159 if (IS_ENABLED(CONFIG_QCOM_RPMCC)) {
160 node = of_find_compatible_node(NULL, NULL, "qcom,rpmcc");
161 if (of_device_is_available(node))
162 add_factor = false;
163 of_node_put(node);
164 }
165
166 return _qcom_cc_register_board_clk(dev, path, name, rate, add_factor);
167}
168EXPORT_SYMBOL_GPL(qcom_cc_register_board_clk);
169
170int qcom_cc_register_sleep_clk(struct device *dev)
171{
172 return _qcom_cc_register_board_clk(dev, "sleep_clk", "sleep_clk_src",
173 32768, true);
174}
175EXPORT_SYMBOL_GPL(qcom_cc_register_sleep_clk);
176
177int qcom_cc_really_probe(struct platform_device *pdev,
178 const struct qcom_cc_desc *desc, struct regmap *regmap)
179{
180 int i, ret;
181 struct device *dev = &pdev->dev;
182 struct clk *clk;
183 struct clk_onecell_data *data;
184 struct clk **clks;
185 struct qcom_reset_controller *reset;
186 struct qcom_cc *cc;
187 struct gdsc_desc *scd;
188 size_t num_clks = desc->num_clks;
189 struct clk_regmap **rclks = desc->clks;
190
191 cc = devm_kzalloc(dev, sizeof(*cc) + sizeof(*clks) * num_clks,
192 GFP_KERNEL);
193 if (!cc)
194 return -ENOMEM;
195
196 clks = cc->clks;
197 data = &cc->data;
198 data->clks = clks;
199 data->clk_num = num_clks;
200
201 for (i = 0; i < num_clks; i++) {
202 if (!rclks[i]) {
203 clks[i] = ERR_PTR(-ENOENT);
204 continue;
205 }
206 clk = devm_clk_register_regmap(dev, rclks[i]);
207 if (IS_ERR(clk))
208 return PTR_ERR(clk);
209 clks[i] = clk;
210 }
211
212 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
213 if (ret)
214 return ret;
215
216 ret = devm_add_action_or_reset(dev, qcom_cc_del_clk_provider,
217 pdev->dev.of_node);
218
219 if (ret)
220 return ret;
221
222 reset = &cc->reset;
223 reset->rcdev.of_node = dev->of_node;
224 reset->rcdev.ops = &qcom_reset_ops;
225 reset->rcdev.owner = dev->driver->owner;
226 reset->rcdev.nr_resets = desc->num_resets;
227 reset->regmap = regmap;
228 reset->reset_map = desc->resets;
229
230 ret = reset_controller_register(&reset->rcdev);
231 if (ret)
232 return ret;
233
234 ret = devm_add_action_or_reset(dev, qcom_cc_reset_unregister,
235 &reset->rcdev);
236
237 if (ret)
238 return ret;
239
240 if (desc->gdscs && desc->num_gdscs) {
241 scd = devm_kzalloc(dev, sizeof(*scd), GFP_KERNEL);
242 if (!scd)
243 return -ENOMEM;
244 scd->dev = dev;
245 scd->scs = desc->gdscs;
246 scd->num = desc->num_gdscs;
247 ret = gdsc_register(scd, &reset->rcdev, regmap);
248 if (ret)
249 return ret;
250 ret = devm_add_action_or_reset(dev, qcom_cc_gdsc_unregister,
251 scd);
252 if (ret)
253 return ret;
254 }
255
256 return 0;
257}
258EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
259
260int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
261{
262 struct regmap *regmap;
263
264 regmap = qcom_cc_map(pdev, desc);
265 if (IS_ERR(regmap))
266 return PTR_ERR(regmap);
267
268 return qcom_cc_really_probe(pdev, desc, regmap);
269}
270EXPORT_SYMBOL_GPL(qcom_cc_probe);
271
272MODULE_LICENSE("GPL v2");
273
