GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / soc / actions / owl-sps.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Actions Semi Owl Smart Power System (SPS)
4  *
5  * Copyright 2012 Actions Semi Inc.
6  * Author: Actions Semi, Inc.
7  *
8  * Copyright (c) 2017 Andreas Färber
9  */
10
11 #include <linux/of_address.h>
12 #include <linux/of_platform.h>
13 #include <linux/pm_domain.h>
14 #include <linux/soc/actions/owl-sps.h>
15 #include <dt-bindings/power/owl-s500-powergate.h>
16 #include <dt-bindings/power/owl-s700-powergate.h>
17 #include <dt-bindings/power/owl-s900-powergate.h>
18
19 struct owl_sps_domain_info {
20         const char *name;
21         int pwr_bit;
22         int ack_bit;
23         unsigned int genpd_flags;
24 };
25
26 struct owl_sps_info {
27         unsigned num_domains;
28         const struct owl_sps_domain_info *domains;
29 };
30
31 struct owl_sps {
32         struct device *dev;
33         const struct owl_sps_info *info;
34         void __iomem *base;
35         struct genpd_onecell_data genpd_data;
36         struct generic_pm_domain *domains[];
37 };
38
39 #define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd)
40
41 struct owl_sps_domain {
42         struct generic_pm_domain genpd;
43         const struct owl_sps_domain_info *info;
44         struct owl_sps *sps;
45 };
46
47 static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
48 {
49         u32 pwr_mask, ack_mask;
50
51         ack_mask = BIT(pd->info->ack_bit);
52         pwr_mask = BIT(pd->info->pwr_bit);
53
54         return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);
55 }
56
57 static int owl_sps_power_on(struct generic_pm_domain *domain)
58 {
59         struct owl_sps_domain *pd = to_owl_pd(domain);
60
61         dev_dbg(pd->sps->dev, "%s power on", pd->info->name);
62
63         return owl_sps_set_power(pd, true);
64 }
65
66 static int owl_sps_power_off(struct generic_pm_domain *domain)
67 {
68         struct owl_sps_domain *pd = to_owl_pd(domain);
69
70         dev_dbg(pd->sps->dev, "%s power off", pd->info->name);
71
72         return owl_sps_set_power(pd, false);
73 }
74
75 static int owl_sps_init_domain(struct owl_sps *sps, int index)
76 {
77         struct owl_sps_domain *pd;
78
79         pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);
80         if (!pd)
81                 return -ENOMEM;
82
83         pd->info = &sps->info->domains[index];
84         pd->sps = sps;
85
86         pd->genpd.name = pd->info->name;
87         pd->genpd.power_on = owl_sps_power_on;
88         pd->genpd.power_off = owl_sps_power_off;
89         pd->genpd.flags = pd->info->genpd_flags;
90         pm_genpd_init(&pd->genpd, NULL, false);
91
92         sps->genpd_data.domains[index] = &pd->genpd;
93
94         return 0;
95 }
96
97 static int owl_sps_probe(struct platform_device *pdev)
98 {
99         const struct of_device_id *match;
100         const struct owl_sps_info *sps_info;
101         struct owl_sps *sps;
102         int i, ret;
103
104         if (!pdev->dev.of_node) {
105                 dev_err(&pdev->dev, "no device node\n");
106                 return -ENODEV;
107         }
108
109         match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
110         if (!match || !match->data) {
111                 dev_err(&pdev->dev, "unknown compatible or missing data\n");
112                 return -EINVAL;
113         }
114
115         sps_info = match->data;
116
117         sps = devm_kzalloc(&pdev->dev,
118                            struct_size(sps, domains, sps_info->num_domains),
119                            GFP_KERNEL);
120         if (!sps)
121                 return -ENOMEM;
122
123         sps->base = of_io_request_and_map(pdev->dev.of_node, 0, "owl-sps");
124         if (IS_ERR(sps->base)) {
125                 dev_err(&pdev->dev, "failed to map sps registers\n");
126                 return PTR_ERR(sps->base);
127         }
128
129         sps->dev = &pdev->dev;
130         sps->info = sps_info;
131         sps->genpd_data.domains = sps->domains;
132         sps->genpd_data.num_domains = sps_info->num_domains;
133
134         for (i = 0; i < sps_info->num_domains; i++) {
135                 ret = owl_sps_init_domain(sps, i);
136                 if (ret)
137                         return ret;
138         }
139
140         ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data);
141         if (ret) {
142                 dev_err(&pdev->dev, "failed to add provider (%d)", ret);
143                 return ret;
144         }
145
146         return 0;
147 }
148
149 static const struct owl_sps_domain_info s500_sps_domains[] = {
150         [S500_PD_VDE] = {
151                 .name = "VDE",
152                 .pwr_bit = 0,
153                 .ack_bit = 16,
154         },
155         [S500_PD_VCE_SI] = {
156                 .name = "VCE_SI",
157                 .pwr_bit = 1,
158                 .ack_bit = 17,
159         },
160         [S500_PD_USB2_1] = {
161                 .name = "USB2_1",
162                 .pwr_bit = 2,
163                 .ack_bit = 18,
164         },
165         [S500_PD_CPU2] = {
166                 .name = "CPU2",
167                 .pwr_bit = 5,
168                 .ack_bit = 21,
169                 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
170         },
171         [S500_PD_CPU3] = {
172                 .name = "CPU3",
173                 .pwr_bit = 6,
174                 .ack_bit = 22,
175                 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
176         },
177         [S500_PD_DMA] = {
178                 .name = "DMA",
179                 .pwr_bit = 8,
180                 .ack_bit = 12,
181         },
182         [S500_PD_DS] = {
183                 .name = "DS",
184                 .pwr_bit = 9,
185                 .ack_bit = 13,
186         },
187         [S500_PD_USB3] = {
188                 .name = "USB3",
189                 .pwr_bit = 10,
190                 .ack_bit = 14,
191         },
192         [S500_PD_USB2_0] = {
193                 .name = "USB2_0",
194                 .pwr_bit = 11,
195                 .ack_bit = 15,
196         },
197 };
198
199 static const struct owl_sps_info s500_sps_info = {
200         .num_domains = ARRAY_SIZE(s500_sps_domains),
201         .domains = s500_sps_domains,
202 };
203
204 static const struct owl_sps_domain_info s700_sps_domains[] = {
205         [S700_PD_VDE] = {
206                 .name = "VDE",
207                 .pwr_bit = 0,
208         },
209         [S700_PD_VCE_SI] = {
210                 .name = "VCE_SI",
211                 .pwr_bit = 1,
212         },
213         [S700_PD_USB2_1] = {
214                 .name = "USB2_1",
215                 .pwr_bit = 2,
216         },
217         [S700_PD_HDE] = {
218                 .name = "HDE",
219                 .pwr_bit = 7,
220         },
221         [S700_PD_DMA] = {
222                 .name = "DMA",
223                 .pwr_bit = 8,
224         },
225         [S700_PD_DS] = {
226                 .name = "DS",
227                 .pwr_bit = 9,
228         },
229         [S700_PD_USB3] = {
230                 .name = "USB3",
231                 .pwr_bit = 10,
232         },
233         [S700_PD_USB2_0] = {
234                 .name = "USB2_0",
235                 .pwr_bit = 11,
236         },
237 };
238
239 static const struct owl_sps_info s700_sps_info = {
240         .num_domains = ARRAY_SIZE(s700_sps_domains),
241         .domains = s700_sps_domains,
242 };
243
244 static const struct owl_sps_domain_info s900_sps_domains[] = {
245         [S900_PD_GPU_B] = {
246                 .name = "GPU_B",
247                 .pwr_bit = 3,
248         },
249         [S900_PD_VCE] = {
250                 .name = "VCE",
251                 .pwr_bit = 4,
252         },
253         [S900_PD_SENSOR] = {
254                 .name = "SENSOR",
255                 .pwr_bit = 5,
256         },
257         [S900_PD_VDE] = {
258                 .name = "VDE",
259                 .pwr_bit = 6,
260         },
261         [S900_PD_HDE] = {
262                 .name = "HDE",
263                 .pwr_bit = 7,
264         },
265         [S900_PD_USB3] = {
266                 .name = "USB3",
267                 .pwr_bit = 8,
268         },
269         [S900_PD_DDR0] = {
270                 .name = "DDR0",
271                 .pwr_bit = 9,
272         },
273         [S900_PD_DDR1] = {
274                 .name = "DDR1",
275                 .pwr_bit = 10,
276         },
277         [S900_PD_DE] = {
278                 .name = "DE",
279                 .pwr_bit = 13,
280         },
281         [S900_PD_NAND] = {
282                 .name = "NAND",
283                 .pwr_bit = 14,
284         },
285         [S900_PD_USB2_H0] = {
286                 .name = "USB2_H0",
287                 .pwr_bit = 15,
288         },
289         [S900_PD_USB2_H1] = {
290                 .name = "USB2_H1",
291                 .pwr_bit = 16,
292         },
293 };
294
295 static const struct owl_sps_info s900_sps_info = {
296         .num_domains = ARRAY_SIZE(s900_sps_domains),
297         .domains = s900_sps_domains,
298 };
299
300 static const struct of_device_id owl_sps_of_matches[] = {
301         { .compatible = "actions,s500-sps", .data = &s500_sps_info },
302         { .compatible = "actions,s700-sps", .data = &s700_sps_info },
303         { .compatible = "actions,s900-sps", .data = &s900_sps_info },
304         { }
305 };
306
307 static struct platform_driver owl_sps_platform_driver = {
308         .probe = owl_sps_probe,
309         .driver = {
310                 .name = "owl-sps",
311                 .of_match_table = owl_sps_of_matches,
312                 .suppress_bind_attrs = true,
313         },
314 };
315
316 static int __init owl_sps_init(void)
317 {
318         return platform_driver_register(&owl_sps_platform_driver);
319 }
320 postcore_initcall(owl_sps_init);