1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2020 Collabora Ltd.
4 */
5 #include <linux/clk.h>
6 #include <linux/clk-provider.h>
7 #include <linux/init.h>
8 #include <linux/io.h>
9 #include <linux/iopoll.h>
10 #include <linux/mfd/syscon.h>
11 #include <linux/of.h>
12 #include <linux/of_clk.h>
13 #include <linux/platform_device.h>
14 #include <linux/pm_domain.h>
15 #include <linux/regmap.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/soc/mediatek/infracfg.h>
18
19 #include "mt6795-pm-domains.h"
20 #include "mt8167-pm-domains.h"
21 #include "mt8173-pm-domains.h"
22 #include "mt8183-pm-domains.h"
23 #include "mt8186-pm-domains.h"
24 #include "mt8188-pm-domains.h"
25 #include "mt8192-pm-domains.h"
26 #include "mt8195-pm-domains.h"
27
28 #define MTK_POLL_DELAY_US 10
29 #define MTK_POLL_TIMEOUT USEC_PER_SEC
30
31 #define PWR_RST_B_BIT BIT(0)
32 #define PWR_ISO_BIT BIT(1)
33 #define PWR_ON_BIT BIT(2)
34 #define PWR_ON_2ND_BIT BIT(3)
35 #define PWR_CLK_DIS_BIT BIT(4)
36 #define PWR_SRAM_CLKISO_BIT BIT(5)
37 #define PWR_SRAM_ISOINT_B_BIT BIT(6)
38
39 struct scpsys_domain {
40 struct generic_pm_domain genpd;
41 const struct scpsys_domain_data *data;
42 struct scpsys *scpsys;
43 int num_clks;
44 struct clk_bulk_data *clks;
45 int num_subsys_clks;
46 struct clk_bulk_data *subsys_clks;
47 struct regmap *infracfg;
48 struct regmap *smi;
49 struct regulator *supply;
50 };
51
52 struct scpsys {
53 struct device *dev;
54 struct regmap *base;
55 const struct scpsys_soc_data *soc_data;
56 struct genpd_onecell_data pd_data;
57 struct generic_pm_domain *domains[];
58 };
59
60 #define to_scpsys_domain(gpd) container_of(gpd, struct scpsys_domain, genpd)
61
scpsys_domain_is_on(struct scpsys_domain * pd)62 static bool scpsys_domain_is_on(struct scpsys_domain *pd)
63 {
64 struct scpsys *scpsys = pd->scpsys;
65 u32 status, status2;
66
67 regmap_read(scpsys->base, pd->data->pwr_sta_offs, &status);
68 status &= pd->data->sta_mask;
69
70 regmap_read(scpsys->base, pd->data->pwr_sta2nd_offs, &status2);
71 status2 &= pd->data->sta_mask;
72
73 /* A domain is on when both status bits are set. */
74 return status && status2;
75 }
76
scpsys_sram_enable(struct scpsys_domain * pd)77 static int scpsys_sram_enable(struct scpsys_domain *pd)
78 {
79 u32 pdn_ack = pd->data->sram_pdn_ack_bits;
80 struct scpsys *scpsys = pd->scpsys;
81 unsigned int tmp;
82 int ret;
83
84 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, pd->data->sram_pdn_bits);
85
86 /* Either wait until SRAM_PDN_ACK all 1 or 0 */
87 ret = regmap_read_poll_timeout(scpsys->base, pd->data->ctl_offs, tmp,
88 (tmp & pdn_ack) == 0, MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
89 if (ret < 0)
90 return ret;
91
92 if (MTK_SCPD_CAPS(pd, MTK_SCPD_SRAM_ISO)) {
93 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_ISOINT_B_BIT);
94 udelay(1);
95 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_CLKISO_BIT);
96 }
97
98 return 0;
99 }
100
scpsys_sram_disable(struct scpsys_domain * pd)101 static int scpsys_sram_disable(struct scpsys_domain *pd)
102 {
103 u32 pdn_ack = pd->data->sram_pdn_ack_bits;
104 struct scpsys *scpsys = pd->scpsys;
105 unsigned int tmp;
106
107 if (MTK_SCPD_CAPS(pd, MTK_SCPD_SRAM_ISO)) {
108 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_CLKISO_BIT);
109 udelay(1);
110 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_ISOINT_B_BIT);
111 }
112
113 regmap_set_bits(scpsys->base, pd->data->ctl_offs, pd->data->sram_pdn_bits);
114
115 /* Either wait until SRAM_PDN_ACK all 1 or 0 */
116 return regmap_read_poll_timeout(scpsys->base, pd->data->ctl_offs, tmp,
117 (tmp & pdn_ack) == pdn_ack, MTK_POLL_DELAY_US,
118 MTK_POLL_TIMEOUT);
119 }
120
_scpsys_bus_protect_enable(const struct scpsys_bus_prot_data * bpd,struct regmap * regmap)121 static int _scpsys_bus_protect_enable(const struct scpsys_bus_prot_data *bpd, struct regmap *regmap)
122 {
123 int i, ret;
124
125 for (i = 0; i < SPM_MAX_BUS_PROT_DATA; i++) {
126 u32 val, mask = bpd[i].bus_prot_mask;
127
128 if (!mask)
129 break;
130
131 if (bpd[i].bus_prot_reg_update)
132 regmap_set_bits(regmap, bpd[i].bus_prot_set, mask);
133 else
134 regmap_write(regmap, bpd[i].bus_prot_set, mask);
135
136 ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta,
137 val, (val & mask) == mask,
138 MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
139 if (ret)
140 return ret;
141 }
142
143 return 0;
144 }
145
scpsys_bus_protect_enable(struct scpsys_domain * pd)146 static int scpsys_bus_protect_enable(struct scpsys_domain *pd)
147 {
148 int ret;
149
150 ret = _scpsys_bus_protect_enable(pd->data->bp_infracfg, pd->infracfg);
151 if (ret)
152 return ret;
153
154 return _scpsys_bus_protect_enable(pd->data->bp_smi, pd->smi);
155 }
156
_scpsys_bus_protect_disable(const struct scpsys_bus_prot_data * bpd,struct regmap * regmap)157 static int _scpsys_bus_protect_disable(const struct scpsys_bus_prot_data *bpd,
158 struct regmap *regmap)
159 {
160 int i, ret;
161
162 for (i = SPM_MAX_BUS_PROT_DATA - 1; i >= 0; i--) {
163 u32 val, mask = bpd[i].bus_prot_mask;
164
165 if (!mask)
166 continue;
167
168 if (bpd[i].bus_prot_reg_update)
169 regmap_clear_bits(regmap, bpd[i].bus_prot_clr, mask);
170 else
171 regmap_write(regmap, bpd[i].bus_prot_clr, mask);
172
173 if (bpd[i].ignore_clr_ack)
174 continue;
175
176 ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta,
177 val, !(val & mask),
178 MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
179 if (ret)
180 return ret;
181 }
182
183 return 0;
184 }
185
scpsys_bus_protect_disable(struct scpsys_domain * pd)186 static int scpsys_bus_protect_disable(struct scpsys_domain *pd)
187 {
188 int ret;
189
190 ret = _scpsys_bus_protect_disable(pd->data->bp_smi, pd->smi);
191 if (ret)
192 return ret;
193
194 return _scpsys_bus_protect_disable(pd->data->bp_infracfg, pd->infracfg);
195 }
196
scpsys_regulator_enable(struct regulator * supply)197 static int scpsys_regulator_enable(struct regulator *supply)
198 {
199 return supply ? regulator_enable(supply) : 0;
200 }
201
scpsys_regulator_disable(struct regulator * supply)202 static int scpsys_regulator_disable(struct regulator *supply)
203 {
204 return supply ? regulator_disable(supply) : 0;
205 }
206
scpsys_power_on(struct generic_pm_domain * genpd)207 static int scpsys_power_on(struct generic_pm_domain *genpd)
208 {
209 struct scpsys_domain *pd = container_of(genpd, struct scpsys_domain, genpd);
210 struct scpsys *scpsys = pd->scpsys;
211 bool tmp;
212 int ret;
213
214 ret = scpsys_regulator_enable(pd->supply);
215 if (ret)
216 return ret;
217
218 ret = clk_bulk_prepare_enable(pd->num_clks, pd->clks);
219 if (ret)
220 goto err_reg;
221
222 if (pd->data->ext_buck_iso_offs && MTK_SCPD_CAPS(pd, MTK_SCPD_EXT_BUCK_ISO))
223 regmap_clear_bits(scpsys->base, pd->data->ext_buck_iso_offs,
224 pd->data->ext_buck_iso_mask);
225
226 /* subsys power on */
227 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT);
228 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT);
229
230 /* wait until PWR_ACK = 1 */
231 ret = readx_poll_timeout(scpsys_domain_is_on, pd, tmp, tmp, MTK_POLL_DELAY_US,
232 MTK_POLL_TIMEOUT);
233 if (ret < 0)
234 goto err_pwr_ack;
235
236 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_CLK_DIS_BIT);
237 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT);
238 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT);
239
240 ret = clk_bulk_prepare_enable(pd->num_subsys_clks, pd->subsys_clks);
241 if (ret)
242 goto err_pwr_ack;
243
244 ret = scpsys_sram_enable(pd);
245 if (ret < 0)
246 goto err_disable_subsys_clks;
247
248 ret = scpsys_bus_protect_disable(pd);
249 if (ret < 0)
250 goto err_disable_sram;
251
252 return 0;
253
254 err_disable_sram:
255 scpsys_sram_disable(pd);
256 err_disable_subsys_clks:
257 clk_bulk_disable_unprepare(pd->num_subsys_clks, pd->subsys_clks);
258 err_pwr_ack:
259 clk_bulk_disable_unprepare(pd->num_clks, pd->clks);
260 err_reg:
261 scpsys_regulator_disable(pd->supply);
262 return ret;
263 }
264
scpsys_power_off(struct generic_pm_domain * genpd)265 static int scpsys_power_off(struct generic_pm_domain *genpd)
266 {
267 struct scpsys_domain *pd = container_of(genpd, struct scpsys_domain, genpd);
268 struct scpsys *scpsys = pd->scpsys;
269 bool tmp;
270 int ret;
271
272 ret = scpsys_bus_protect_enable(pd);
273 if (ret < 0)
274 return ret;
275
276 ret = scpsys_sram_disable(pd);
277 if (ret < 0)
278 return ret;
279
280 if (pd->data->ext_buck_iso_offs && MTK_SCPD_CAPS(pd, MTK_SCPD_EXT_BUCK_ISO))
281 regmap_set_bits(scpsys->base, pd->data->ext_buck_iso_offs,
282 pd->data->ext_buck_iso_mask);
283
284 clk_bulk_disable_unprepare(pd->num_subsys_clks, pd->subsys_clks);
285
286 /* subsys power off */
287 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT);
288 regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_CLK_DIS_BIT);
289 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT);
290 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT);
291 regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT);
292
293 /* wait until PWR_ACK = 0 */
294 ret = readx_poll_timeout(scpsys_domain_is_on, pd, tmp, !tmp, MTK_POLL_DELAY_US,
295 MTK_POLL_TIMEOUT);
296 if (ret < 0)
297 return ret;
298
299 clk_bulk_disable_unprepare(pd->num_clks, pd->clks);
300
301 scpsys_regulator_disable(pd->supply);
302
303 return 0;
304 }
305
306 static struct
scpsys_add_one_domain(struct scpsys * scpsys,struct device_node * node)307 generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_node *node)
308 {
309 const struct scpsys_domain_data *domain_data;
310 struct scpsys_domain *pd;
311 struct device_node *root_node = scpsys->dev->of_node;
312 struct device_node *smi_node;
313 struct property *prop;
314 const char *clk_name;
315 int i, ret, num_clks;
316 struct clk *clk;
317 int clk_ind = 0;
318 u32 id;
319
320 ret = of_property_read_u32(node, "reg", &id);
321 if (ret) {
322 dev_err(scpsys->dev, "%pOF: failed to retrieve domain id from reg: %d\n",
323 node, ret);
324 return ERR_PTR(-EINVAL);
325 }
326
327 if (id >= scpsys->soc_data->num_domains) {
328 dev_err(scpsys->dev, "%pOF: invalid domain id %d\n", node, id);
329 return ERR_PTR(-EINVAL);
330 }
331
332 domain_data = &scpsys->soc_data->domains_data[id];
333 if (domain_data->sta_mask == 0) {
334 dev_err(scpsys->dev, "%pOF: undefined domain id %d\n", node, id);
335 return ERR_PTR(-EINVAL);
336 }
337
338 pd = devm_kzalloc(scpsys->dev, sizeof(*pd), GFP_KERNEL);
339 if (!pd)
340 return ERR_PTR(-ENOMEM);
341
342 pd->data = domain_data;
343 pd->scpsys = scpsys;
344
345 if (MTK_SCPD_CAPS(pd, MTK_SCPD_DOMAIN_SUPPLY)) {
346 /*
347 * Find regulator in current power domain node.
348 * devm_regulator_get() finds regulator in a node and its child
349 * node, so set of_node to current power domain node then change
350 * back to original node after regulator is found for current
351 * power domain node.
352 */
353 scpsys->dev->of_node = node;
354 pd->supply = devm_regulator_get(scpsys->dev, "domain");
355 scpsys->dev->of_node = root_node;
356 if (IS_ERR(pd->supply)) {
357 dev_err_probe(scpsys->dev, PTR_ERR(pd->supply),
358 "%pOF: failed to get power supply.\n",
359 node);
360 return ERR_CAST(pd->supply);
361 }
362 }
363
364 pd->infracfg = syscon_regmap_lookup_by_phandle_optional(node, "mediatek,infracfg");
365 if (IS_ERR(pd->infracfg))
366 return ERR_CAST(pd->infracfg);
367
368 smi_node = of_parse_phandle(node, "mediatek,smi", 0);
369 if (smi_node) {
370 pd->smi = device_node_to_regmap(smi_node);
371 of_node_put(smi_node);
372 if (IS_ERR(pd->smi))
373 return ERR_CAST(pd->smi);
374 }
375
376 num_clks = of_clk_get_parent_count(node);
377 if (num_clks > 0) {
378 /* Calculate number of subsys_clks */
379 of_property_for_each_string(node, "clock-names", prop, clk_name) {
380 char *subsys;
381
382 subsys = strchr(clk_name, '-');
383 if (subsys)
384 pd->num_subsys_clks++;
385 else
386 pd->num_clks++;
387 }
388
389 pd->clks = devm_kcalloc(scpsys->dev, pd->num_clks, sizeof(*pd->clks), GFP_KERNEL);
390 if (!pd->clks)
391 return ERR_PTR(-ENOMEM);
392
393 pd->subsys_clks = devm_kcalloc(scpsys->dev, pd->num_subsys_clks,
394 sizeof(*pd->subsys_clks), GFP_KERNEL);
395 if (!pd->subsys_clks)
396 return ERR_PTR(-ENOMEM);
397
398 }
399
400 for (i = 0; i < pd->num_clks; i++) {
401 clk = of_clk_get(node, i);
402 if (IS_ERR(clk)) {
403 ret = PTR_ERR(clk);
404 dev_err_probe(scpsys->dev, ret,
405 "%pOF: failed to get clk at index %d\n", node, i);
406 goto err_put_clocks;
407 }
408
409 pd->clks[clk_ind++].clk = clk;
410 }
411
412 for (i = 0; i < pd->num_subsys_clks; i++) {
413 clk = of_clk_get(node, i + clk_ind);
414 if (IS_ERR(clk)) {
415 ret = PTR_ERR(clk);
416 dev_err_probe(scpsys->dev, ret,
417 "%pOF: failed to get clk at index %d\n", node,
418 i + clk_ind);
419 goto err_put_subsys_clocks;
420 }
421
422 pd->subsys_clks[i].clk = clk;
423 }
424
425 /*
426 * Initially turn on all domains to make the domains usable
427 * with !CONFIG_PM and to get the hardware in sync with the
428 * software. The unused domains will be switched off during
429 * late_init time.
430 */
431 if (MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF)) {
432 if (scpsys_domain_is_on(pd))
433 dev_warn(scpsys->dev,
434 "%pOF: A default off power domain has been ON\n", node);
435 } else {
436 ret = scpsys_power_on(&pd->genpd);
437 if (ret < 0) {
438 dev_err(scpsys->dev, "%pOF: failed to power on domain: %d\n", node, ret);
439 goto err_put_subsys_clocks;
440 }
441
442 if (MTK_SCPD_CAPS(pd, MTK_SCPD_ALWAYS_ON))
443 pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
444 }
445
446 if (scpsys->domains[id]) {
447 ret = -EINVAL;
448 dev_err(scpsys->dev,
449 "power domain with id %d already exists, check your device-tree\n", id);
450 goto err_put_subsys_clocks;
451 }
452
453 if (!pd->data->name)
454 pd->genpd.name = node->name;
455 else
456 pd->genpd.name = pd->data->name;
457
458 pd->genpd.power_off = scpsys_power_off;
459 pd->genpd.power_on = scpsys_power_on;
460
461 if (MTK_SCPD_CAPS(pd, MTK_SCPD_ACTIVE_WAKEUP))
462 pd->genpd.flags |= GENPD_FLAG_ACTIVE_WAKEUP;
463
464 if (MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF))
465 pm_genpd_init(&pd->genpd, NULL, true);
466 else
467 pm_genpd_init(&pd->genpd, NULL, false);
468
469 scpsys->domains[id] = &pd->genpd;
470
471 return scpsys->pd_data.domains[id];
472
473 err_put_subsys_clocks:
474 clk_bulk_put(pd->num_subsys_clks, pd->subsys_clks);
475 err_put_clocks:
476 clk_bulk_put(pd->num_clks, pd->clks);
477 return ERR_PTR(ret);
478 }
479
scpsys_add_subdomain(struct scpsys * scpsys,struct device_node * parent)480 static int scpsys_add_subdomain(struct scpsys *scpsys, struct device_node *parent)
481 {
482 struct generic_pm_domain *child_pd, *parent_pd;
483 struct device_node *child;
484 int ret;
485
486 for_each_child_of_node(parent, child) {
487 u32 id;
488
489 ret = of_property_read_u32(parent, "reg", &id);
490 if (ret) {
491 dev_err(scpsys->dev, "%pOF: failed to get parent domain id\n", child);
492 goto err_put_node;
493 }
494
495 if (!scpsys->pd_data.domains[id]) {
496 ret = -EINVAL;
497 dev_err(scpsys->dev, "power domain with id %d does not exist\n", id);
498 goto err_put_node;
499 }
500
501 parent_pd = scpsys->pd_data.domains[id];
502
503 child_pd = scpsys_add_one_domain(scpsys, child);
504 if (IS_ERR(child_pd)) {
505 ret = PTR_ERR(child_pd);
506 dev_err_probe(scpsys->dev, ret, "%pOF: failed to get child domain id\n",
507 child);
508 goto err_put_node;
509 }
510
511 /* recursive call to add all subdomains */
512 ret = scpsys_add_subdomain(scpsys, child);
513 if (ret)
514 goto err_put_node;
515
516 ret = pm_genpd_add_subdomain(parent_pd, child_pd);
517 if (ret) {
518 dev_err(scpsys->dev, "failed to add %s subdomain to parent %s\n",
519 child_pd->name, parent_pd->name);
520 goto err_put_node;
521 } else {
522 dev_dbg(scpsys->dev, "%s add subdomain: %s\n", parent_pd->name,
523 child_pd->name);
524 }
525 }
526
527 return 0;
528
529 err_put_node:
530 of_node_put(child);
531 return ret;
532 }
533
scpsys_remove_one_domain(struct scpsys_domain * pd)534 static void scpsys_remove_one_domain(struct scpsys_domain *pd)
535 {
536 int ret;
537
538 /*
539 * We're in the error cleanup already, so we only complain,
540 * but won't emit another error on top of the original one.
541 */
542 ret = pm_genpd_remove(&pd->genpd);
543 if (ret < 0)
544 dev_err(pd->scpsys->dev,
545 "failed to remove domain '%s' : %d - state may be inconsistent\n",
546 pd->genpd.name, ret);
547 if (scpsys_domain_is_on(pd))
548 scpsys_power_off(&pd->genpd);
549
550 clk_bulk_put(pd->num_clks, pd->clks);
551 clk_bulk_put(pd->num_subsys_clks, pd->subsys_clks);
552 }
553
scpsys_domain_cleanup(struct scpsys * scpsys)554 static void scpsys_domain_cleanup(struct scpsys *scpsys)
555 {
556 struct generic_pm_domain *genpd;
557 struct scpsys_domain *pd;
558 int i;
559
560 for (i = scpsys->pd_data.num_domains - 1; i >= 0; i--) {
561 genpd = scpsys->pd_data.domains[i];
562 if (genpd) {
563 pd = to_scpsys_domain(genpd);
564 scpsys_remove_one_domain(pd);
565 }
566 }
567 }
568
569 static const struct of_device_id scpsys_of_match[] = {
570 {
571 .compatible = "mediatek,mt6795-power-controller",
572 .data = &mt6795_scpsys_data,
573 },
574 {
575 .compatible = "mediatek,mt8167-power-controller",
576 .data = &mt8167_scpsys_data,
577 },
578 {
579 .compatible = "mediatek,mt8173-power-controller",
580 .data = &mt8173_scpsys_data,
581 },
582 {
583 .compatible = "mediatek,mt8183-power-controller",
584 .data = &mt8183_scpsys_data,
585 },
586 {
587 .compatible = "mediatek,mt8186-power-controller",
588 .data = &mt8186_scpsys_data,
589 },
590 {
591 .compatible = "mediatek,mt8188-power-controller",
592 .data = &mt8188_scpsys_data,
593 },
594 {
595 .compatible = "mediatek,mt8192-power-controller",
596 .data = &mt8192_scpsys_data,
597 },
598 {
599 .compatible = "mediatek,mt8195-power-controller",
600 .data = &mt8195_scpsys_data,
601 },
602 { }
603 };
604
scpsys_probe(struct platform_device * pdev)605 static int scpsys_probe(struct platform_device *pdev)
606 {
607 struct device *dev = &pdev->dev;
608 struct device_node *np = dev->of_node;
609 const struct scpsys_soc_data *soc;
610 struct device_node *node;
611 struct device *parent;
612 struct scpsys *scpsys;
613 int ret;
614
615 soc = of_device_get_match_data(&pdev->dev);
616 if (!soc) {
617 dev_err(&pdev->dev, "no power controller data\n");
618 return -EINVAL;
619 }
620
621 scpsys = devm_kzalloc(dev, struct_size(scpsys, domains, soc->num_domains), GFP_KERNEL);
622 if (!scpsys)
623 return -ENOMEM;
624
625 scpsys->dev = dev;
626 scpsys->soc_data = soc;
627
628 scpsys->pd_data.domains = scpsys->domains;
629 scpsys->pd_data.num_domains = soc->num_domains;
630
631 parent = dev->parent;
632 if (!parent) {
633 dev_err(dev, "no parent for syscon devices\n");
634 return -ENODEV;
635 }
636
637 scpsys->base = syscon_node_to_regmap(parent->of_node);
638 if (IS_ERR(scpsys->base)) {
639 dev_err(dev, "no regmap available\n");
640 return PTR_ERR(scpsys->base);
641 }
642
643 ret = -ENODEV;
644 for_each_available_child_of_node(np, node) {
645 struct generic_pm_domain *domain;
646
647 domain = scpsys_add_one_domain(scpsys, node);
648 if (IS_ERR(domain)) {
649 ret = PTR_ERR(domain);
650 of_node_put(node);
651 goto err_cleanup_domains;
652 }
653
654 ret = scpsys_add_subdomain(scpsys, node);
655 if (ret) {
656 of_node_put(node);
657 goto err_cleanup_domains;
658 }
659 }
660
661 if (ret) {
662 dev_dbg(dev, "no power domains present\n");
663 return ret;
664 }
665
666 ret = of_genpd_add_provider_onecell(np, &scpsys->pd_data);
667 if (ret) {
668 dev_err(dev, "failed to add provider: %d\n", ret);
669 goto err_cleanup_domains;
670 }
671
672 return 0;
673
674 err_cleanup_domains:
675 scpsys_domain_cleanup(scpsys);
676 return ret;
677 }
678
679 static struct platform_driver scpsys_pm_domain_driver = {
680 .probe = scpsys_probe,
681 .driver = {
682 .name = "mtk-power-controller",
683 .suppress_bind_attrs = true,
684 .of_match_table = scpsys_of_match,
685 },
686 };
687 builtin_platform_driver(scpsys_pm_domain_driver);
688