1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018, The Linux Foundation. All rights reserved.*/
3
4 #include <linux/err.h>
5 #include <linux/init.h>
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/mutex.h>
9 #include <linux/pm_domain.h>
10 #include <linux/slab.h>
11 #include <linux/of.h>
12 #include <linux/of_device.h>
13 #include <linux/platform_device.h>
14 #include <linux/pm_opp.h>
15 #include <soc/qcom/cmd-db.h>
16 #include <soc/qcom/rpmh.h>
17 #include <dt-bindings/power/qcom-rpmpd.h>
18
19 #define domain_to_rpmhpd(domain) container_of(domain, struct rpmhpd, pd)
20
21 #define RPMH_ARC_MAX_LEVELS 16
22
23 /**
24 * struct rpmhpd - top level RPMh power domain resource data structure
25 * @dev: rpmh power domain controller device
26 * @pd: generic_pm_domain corrresponding to the power domain
27 * @parent: generic_pm_domain corrresponding to the parent's power domain
28 * @peer: A peer power domain in case Active only Voting is
29 * supported
30 * @active_only: True if it represents an Active only peer
31 * @corner: current corner
32 * @active_corner: current active corner
33 * @enable_corner: lowest non-zero corner
34 * @level: An array of level (vlvl) to corner (hlvl) mappings
35 * derived from cmd-db
36 * @level_count: Number of levels supported by the power domain. max
37 * being 16 (0 - 15)
38 * @enabled: true if the power domain is enabled
39 * @res_name: Resource name used for cmd-db lookup
40 * @addr: Resource address as looped up using resource name from
41 * cmd-db
42 */
43 struct rpmhpd {
44 struct device *dev;
45 struct generic_pm_domain pd;
46 struct generic_pm_domain *parent;
47 struct rpmhpd *peer;
48 const bool active_only;
49 unsigned int corner;
50 unsigned int active_corner;
51 unsigned int enable_corner;
52 u32 level[RPMH_ARC_MAX_LEVELS];
53 size_t level_count;
54 bool enabled;
55 const char *res_name;
56 u32 addr;
57 };
58
59 struct rpmhpd_desc {
60 struct rpmhpd **rpmhpds;
61 size_t num_pds;
62 };
63
64 static DEFINE_MUTEX(rpmhpd_lock);
65
66 /* RPMH powerdomains */
67
68 static struct rpmhpd cx_ao;
69 static struct rpmhpd mx;
70 static struct rpmhpd mx_ao;
71 static struct rpmhpd cx = {
72 .pd = { .name = "cx", },
73 .peer = &cx_ao,
74 .res_name = "cx.lvl",
75 };
76
77 static struct rpmhpd cx_ao = {
78 .pd = { .name = "cx_ao", },
79 .active_only = true,
80 .peer = &cx,
81 .res_name = "cx.lvl",
82 };
83
84 static struct rpmhpd cx_ao_w_mx_parent;
85 static struct rpmhpd cx_w_mx_parent = {
86 .pd = { .name = "cx", },
87 .peer = &cx_ao_w_mx_parent,
88 .parent = &mx.pd,
89 .res_name = "cx.lvl",
90 };
91
92 static struct rpmhpd cx_ao_w_mx_parent = {
93 .pd = { .name = "cx_ao", },
94 .active_only = true,
95 .peer = &cx_w_mx_parent,
96 .parent = &mx_ao.pd,
97 .res_name = "cx.lvl",
98 };
99
100 static struct rpmhpd ebi = {
101 .pd = { .name = "ebi", },
102 .res_name = "ebi.lvl",
103 };
104
105 static struct rpmhpd gfx = {
106 .pd = { .name = "gfx", },
107 .res_name = "gfx.lvl",
108 };
109
110 static struct rpmhpd lcx = {
111 .pd = { .name = "lcx", },
112 .res_name = "lcx.lvl",
113 };
114
115 static struct rpmhpd lmx = {
116 .pd = { .name = "lmx", },
117 .res_name = "lmx.lvl",
118 };
119
120 static struct rpmhpd mmcx_ao;
121 static struct rpmhpd mmcx = {
122 .pd = { .name = "mmcx", },
123 .peer = &mmcx_ao,
124 .res_name = "mmcx.lvl",
125 };
126
127 static struct rpmhpd mmcx_ao = {
128 .pd = { .name = "mmcx_ao", },
129 .active_only = true,
130 .peer = &mmcx,
131 .res_name = "mmcx.lvl",
132 };
133
134 static struct rpmhpd mmcx_ao_w_cx_parent;
135 static struct rpmhpd mmcx_w_cx_parent = {
136 .pd = { .name = "mmcx", },
137 .peer = &mmcx_ao_w_cx_parent,
138 .parent = &cx.pd,
139 .res_name = "mmcx.lvl",
140 };
141
142 static struct rpmhpd mmcx_ao_w_cx_parent = {
143 .pd = { .name = "mmcx_ao", },
144 .active_only = true,
145 .peer = &mmcx_w_cx_parent,
146 .parent = &cx_ao.pd,
147 .res_name = "mmcx.lvl",
148 };
149
150 static struct rpmhpd mss = {
151 .pd = { .name = "mss", },
152 .res_name = "mss.lvl",
153 };
154
155 static struct rpmhpd mx_ao;
156 static struct rpmhpd mx = {
157 .pd = { .name = "mx", },
158 .peer = &mx_ao,
159 .res_name = "mx.lvl",
160 };
161
162 static struct rpmhpd mx_ao = {
163 .pd = { .name = "mx_ao", },
164 .active_only = true,
165 .peer = &mx,
166 .res_name = "mx.lvl",
167 };
168
169 static struct rpmhpd mxc_ao;
170 static struct rpmhpd mxc = {
171 .pd = { .name = "mxc", },
172 .peer = &mxc_ao,
173 .res_name = "mxc.lvl",
174 };
175
176 static struct rpmhpd mxc_ao = {
177 .pd = { .name = "mxc_ao", },
178 .active_only = true,
179 .peer = &mxc,
180 .res_name = "mxc.lvl",
181 };
182
183 static struct rpmhpd nsp = {
184 .pd = { .name = "nsp", },
185 .res_name = "nsp.lvl",
186 };
187
188 static struct rpmhpd qphy = {
189 .pd = { .name = "qphy", },
190 .res_name = "qphy.lvl",
191 };
192
193 /* SA8540P RPMH powerdomains */
194 static struct rpmhpd *sa8540p_rpmhpds[] = {
195 [SC8280XP_CX] = &cx,
196 [SC8280XP_CX_AO] = &cx_ao,
197 [SC8280XP_EBI] = &ebi,
198 [SC8280XP_GFX] = &gfx,
199 [SC8280XP_LCX] = &lcx,
200 [SC8280XP_LMX] = &lmx,
201 [SC8280XP_MMCX] = &mmcx,
202 [SC8280XP_MMCX_AO] = &mmcx_ao,
203 [SC8280XP_MX] = &mx,
204 [SC8280XP_MX_AO] = &mx_ao,
205 [SC8280XP_NSP] = &nsp,
206 };
207
208 static const struct rpmhpd_desc sa8540p_desc = {
209 .rpmhpds = sa8540p_rpmhpds,
210 .num_pds = ARRAY_SIZE(sa8540p_rpmhpds),
211 };
212
213 /* SDM845 RPMH powerdomains */
214 static struct rpmhpd *sdm845_rpmhpds[] = {
215 [SDM845_CX] = &cx_w_mx_parent,
216 [SDM845_CX_AO] = &cx_ao_w_mx_parent,
217 [SDM845_EBI] = &ebi,
218 [SDM845_GFX] = &gfx,
219 [SDM845_LCX] = &lcx,
220 [SDM845_LMX] = &lmx,
221 [SDM845_MSS] = &mss,
222 [SDM845_MX] = &mx,
223 [SDM845_MX_AO] = &mx_ao,
224 };
225
226 static const struct rpmhpd_desc sdm845_desc = {
227 .rpmhpds = sdm845_rpmhpds,
228 .num_pds = ARRAY_SIZE(sdm845_rpmhpds),
229 };
230
231 /* SDX55 RPMH powerdomains */
232 static struct rpmhpd *sdx55_rpmhpds[] = {
233 [SDX55_CX] = &cx_w_mx_parent,
234 [SDX55_MSS] = &mss,
235 [SDX55_MX] = &mx,
236 };
237
238 static const struct rpmhpd_desc sdx55_desc = {
239 .rpmhpds = sdx55_rpmhpds,
240 .num_pds = ARRAY_SIZE(sdx55_rpmhpds),
241 };
242
243 /* SDX65 RPMH powerdomains */
244 static struct rpmhpd *sdx65_rpmhpds[] = {
245 [SDX65_CX] = &cx_w_mx_parent,
246 [SDX65_CX_AO] = &cx_ao_w_mx_parent,
247 [SDX65_MSS] = &mss,
248 [SDX65_MX] = &mx,
249 [SDX65_MX_AO] = &mx_ao,
250 [SDX65_MXC] = &mxc,
251 };
252
253 static const struct rpmhpd_desc sdx65_desc = {
254 .rpmhpds = sdx65_rpmhpds,
255 .num_pds = ARRAY_SIZE(sdx65_rpmhpds),
256 };
257
258 /* SM6350 RPMH powerdomains */
259 static struct rpmhpd *sm6350_rpmhpds[] = {
260 [SM6350_CX] = &cx_w_mx_parent,
261 [SM6350_GFX] = &gfx,
262 [SM6350_LCX] = &lcx,
263 [SM6350_LMX] = &lmx,
264 [SM6350_MSS] = &mss,
265 [SM6350_MX] = &mx,
266 };
267
268 static const struct rpmhpd_desc sm6350_desc = {
269 .rpmhpds = sm6350_rpmhpds,
270 .num_pds = ARRAY_SIZE(sm6350_rpmhpds),
271 };
272
273 /* SM8150 RPMH powerdomains */
274 static struct rpmhpd *sm8150_rpmhpds[] = {
275 [SM8150_CX] = &cx_w_mx_parent,
276 [SM8150_CX_AO] = &cx_ao_w_mx_parent,
277 [SM8150_EBI] = &ebi,
278 [SM8150_GFX] = &gfx,
279 [SM8150_LCX] = &lcx,
280 [SM8150_LMX] = &lmx,
281 [SM8150_MMCX] = &mmcx,
282 [SM8150_MMCX_AO] = &mmcx_ao,
283 [SM8150_MSS] = &mss,
284 [SM8150_MX] = &mx,
285 [SM8150_MX_AO] = &mx_ao,
286 };
287
288 static const struct rpmhpd_desc sm8150_desc = {
289 .rpmhpds = sm8150_rpmhpds,
290 .num_pds = ARRAY_SIZE(sm8150_rpmhpds),
291 };
292
293 /* SM8250 RPMH powerdomains */
294 static struct rpmhpd *sm8250_rpmhpds[] = {
295 [SM8250_CX] = &cx_w_mx_parent,
296 [SM8250_CX_AO] = &cx_ao_w_mx_parent,
297 [SM8250_EBI] = &ebi,
298 [SM8250_GFX] = &gfx,
299 [SM8250_LCX] = &lcx,
300 [SM8250_LMX] = &lmx,
301 [SM8250_MMCX] = &mmcx,
302 [SM8250_MMCX_AO] = &mmcx_ao,
303 [SM8250_MX] = &mx,
304 [SM8250_MX_AO] = &mx_ao,
305 };
306
307 static const struct rpmhpd_desc sm8250_desc = {
308 .rpmhpds = sm8250_rpmhpds,
309 .num_pds = ARRAY_SIZE(sm8250_rpmhpds),
310 };
311
312 /* SM8350 Power domains */
313 static struct rpmhpd *sm8350_rpmhpds[] = {
314 [SM8350_CX] = &cx_w_mx_parent,
315 [SM8350_CX_AO] = &cx_ao_w_mx_parent,
316 [SM8350_EBI] = &ebi,
317 [SM8350_GFX] = &gfx,
318 [SM8350_LCX] = &lcx,
319 [SM8350_LMX] = &lmx,
320 [SM8350_MMCX] = &mmcx,
321 [SM8350_MMCX_AO] = &mmcx_ao,
322 [SM8350_MSS] = &mss,
323 [SM8350_MX] = &mx,
324 [SM8350_MX_AO] = &mx_ao,
325 [SM8350_MXC] = &mxc,
326 [SM8350_MXC_AO] = &mxc_ao,
327 };
328
329 static const struct rpmhpd_desc sm8350_desc = {
330 .rpmhpds = sm8350_rpmhpds,
331 .num_pds = ARRAY_SIZE(sm8350_rpmhpds),
332 };
333
334 /* SM8450 RPMH powerdomains */
335 static struct rpmhpd *sm8450_rpmhpds[] = {
336 [SM8450_CX] = &cx,
337 [SM8450_CX_AO] = &cx_ao,
338 [SM8450_EBI] = &ebi,
339 [SM8450_GFX] = &gfx,
340 [SM8450_LCX] = &lcx,
341 [SM8450_LMX] = &lmx,
342 [SM8450_MMCX] = &mmcx_w_cx_parent,
343 [SM8450_MMCX_AO] = &mmcx_ao_w_cx_parent,
344 [SM8450_MSS] = &mss,
345 [SM8450_MX] = &mx,
346 [SM8450_MX_AO] = &mx_ao,
347 [SM8450_MXC] = &mxc,
348 [SM8450_MXC_AO] = &mxc_ao,
349 };
350
351 static const struct rpmhpd_desc sm8450_desc = {
352 .rpmhpds = sm8450_rpmhpds,
353 .num_pds = ARRAY_SIZE(sm8450_rpmhpds),
354 };
355
356 /* SC7180 RPMH powerdomains */
357 static struct rpmhpd *sc7180_rpmhpds[] = {
358 [SC7180_CX] = &cx_w_mx_parent,
359 [SC7180_CX_AO] = &cx_ao_w_mx_parent,
360 [SC7180_GFX] = &gfx,
361 [SC7180_LCX] = &lcx,
362 [SC7180_LMX] = &lmx,
363 [SC7180_MSS] = &mss,
364 [SC7180_MX] = &mx,
365 [SC7180_MX_AO] = &mx_ao,
366 };
367
368 static const struct rpmhpd_desc sc7180_desc = {
369 .rpmhpds = sc7180_rpmhpds,
370 .num_pds = ARRAY_SIZE(sc7180_rpmhpds),
371 };
372
373 /* SC7280 RPMH powerdomains */
374 static struct rpmhpd *sc7280_rpmhpds[] = {
375 [SC7280_CX] = &cx,
376 [SC7280_CX_AO] = &cx_ao,
377 [SC7280_EBI] = &ebi,
378 [SC7280_GFX] = &gfx,
379 [SC7280_LCX] = &lcx,
380 [SC7280_LMX] = &lmx,
381 [SC7280_MSS] = &mss,
382 [SC7280_MX] = &mx,
383 [SC7280_MX_AO] = &mx_ao,
384 };
385
386 static const struct rpmhpd_desc sc7280_desc = {
387 .rpmhpds = sc7280_rpmhpds,
388 .num_pds = ARRAY_SIZE(sc7280_rpmhpds),
389 };
390
391 /* SC8180x RPMH powerdomains */
392 static struct rpmhpd *sc8180x_rpmhpds[] = {
393 [SC8180X_CX] = &cx_w_mx_parent,
394 [SC8180X_CX_AO] = &cx_ao_w_mx_parent,
395 [SC8180X_EBI] = &ebi,
396 [SC8180X_GFX] = &gfx,
397 [SC8180X_LCX] = &lcx,
398 [SC8180X_LMX] = &lmx,
399 [SC8180X_MMCX] = &mmcx,
400 [SC8180X_MMCX_AO] = &mmcx_ao,
401 [SC8180X_MSS] = &mss,
402 [SC8180X_MX] = &mx,
403 [SC8180X_MX_AO] = &mx_ao,
404 };
405
406 static const struct rpmhpd_desc sc8180x_desc = {
407 .rpmhpds = sc8180x_rpmhpds,
408 .num_pds = ARRAY_SIZE(sc8180x_rpmhpds),
409 };
410
411 /* SC8280xp RPMH powerdomains */
412 static struct rpmhpd *sc8280xp_rpmhpds[] = {
413 [SC8280XP_CX] = &cx,
414 [SC8280XP_CX_AO] = &cx_ao,
415 [SC8280XP_EBI] = &ebi,
416 [SC8280XP_GFX] = &gfx,
417 [SC8280XP_LCX] = &lcx,
418 [SC8280XP_LMX] = &lmx,
419 [SC8280XP_MMCX] = &mmcx,
420 [SC8280XP_MMCX_AO] = &mmcx_ao,
421 [SC8280XP_MX] = &mx,
422 [SC8280XP_MX_AO] = &mx_ao,
423 [SC8280XP_NSP] = &nsp,
424 [SC8280XP_QPHY] = &qphy,
425 };
426
427 static const struct rpmhpd_desc sc8280xp_desc = {
428 .rpmhpds = sc8280xp_rpmhpds,
429 .num_pds = ARRAY_SIZE(sc8280xp_rpmhpds),
430 };
431
432 static const struct of_device_id rpmhpd_match_table[] = {
433 { .compatible = "qcom,sa8540p-rpmhpd", .data = &sa8540p_desc },
434 { .compatible = "qcom,sc7180-rpmhpd", .data = &sc7180_desc },
435 { .compatible = "qcom,sc7280-rpmhpd", .data = &sc7280_desc },
436 { .compatible = "qcom,sc8180x-rpmhpd", .data = &sc8180x_desc },
437 { .compatible = "qcom,sc8280xp-rpmhpd", .data = &sc8280xp_desc },
438 { .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc },
439 { .compatible = "qcom,sdx55-rpmhpd", .data = &sdx55_desc},
440 { .compatible = "qcom,sdx65-rpmhpd", .data = &sdx65_desc},
441 { .compatible = "qcom,sm6350-rpmhpd", .data = &sm6350_desc },
442 { .compatible = "qcom,sm8150-rpmhpd", .data = &sm8150_desc },
443 { .compatible = "qcom,sm8250-rpmhpd", .data = &sm8250_desc },
444 { .compatible = "qcom,sm8350-rpmhpd", .data = &sm8350_desc },
445 { .compatible = "qcom,sm8450-rpmhpd", .data = &sm8450_desc },
446 { }
447 };
448 MODULE_DEVICE_TABLE(of, rpmhpd_match_table);
449
rpmhpd_send_corner(struct rpmhpd * pd,int state,unsigned int corner,bool sync)450 static int rpmhpd_send_corner(struct rpmhpd *pd, int state,
451 unsigned int corner, bool sync)
452 {
453 struct tcs_cmd cmd = {
454 .addr = pd->addr,
455 .data = corner,
456 };
457
458 /*
459 * Wait for an ack only when we are increasing the
460 * perf state of the power domain
461 */
462 if (sync)
463 return rpmh_write(pd->dev, state, &cmd, 1);
464 else
465 return rpmh_write_async(pd->dev, state, &cmd, 1);
466 }
467
to_active_sleep(struct rpmhpd * pd,unsigned int corner,unsigned int * active,unsigned int * sleep)468 static void to_active_sleep(struct rpmhpd *pd, unsigned int corner,
469 unsigned int *active, unsigned int *sleep)
470 {
471 *active = corner;
472
473 if (pd->active_only)
474 *sleep = 0;
475 else
476 *sleep = *active;
477 }
478
479 /*
480 * This function is used to aggregate the votes across the active only
481 * resources and its peers. The aggregated votes are sent to RPMh as
482 * ACTIVE_ONLY votes (which take effect immediately), as WAKE_ONLY votes
483 * (applied by RPMh on system wakeup) and as SLEEP votes (applied by RPMh
484 * on system sleep).
485 * We send ACTIVE_ONLY votes for resources without any peers. For others,
486 * which have an active only peer, all 3 votes are sent.
487 */
rpmhpd_aggregate_corner(struct rpmhpd * pd,unsigned int corner)488 static int rpmhpd_aggregate_corner(struct rpmhpd *pd, unsigned int corner)
489 {
490 int ret;
491 struct rpmhpd *peer = pd->peer;
492 unsigned int active_corner, sleep_corner;
493 unsigned int this_active_corner = 0, this_sleep_corner = 0;
494 unsigned int peer_active_corner = 0, peer_sleep_corner = 0;
495
496 to_active_sleep(pd, corner, &this_active_corner, &this_sleep_corner);
497
498 if (peer && peer->enabled)
499 to_active_sleep(peer, peer->corner, &peer_active_corner,
500 &peer_sleep_corner);
501
502 active_corner = max(this_active_corner, peer_active_corner);
503
504 ret = rpmhpd_send_corner(pd, RPMH_ACTIVE_ONLY_STATE, active_corner,
505 active_corner > pd->active_corner);
506 if (ret)
507 return ret;
508
509 pd->active_corner = active_corner;
510
511 if (peer) {
512 peer->active_corner = active_corner;
513
514 ret = rpmhpd_send_corner(pd, RPMH_WAKE_ONLY_STATE,
515 active_corner, false);
516 if (ret)
517 return ret;
518
519 sleep_corner = max(this_sleep_corner, peer_sleep_corner);
520
521 return rpmhpd_send_corner(pd, RPMH_SLEEP_STATE, sleep_corner,
522 false);
523 }
524
525 return ret;
526 }
527
rpmhpd_power_on(struct generic_pm_domain * domain)528 static int rpmhpd_power_on(struct generic_pm_domain *domain)
529 {
530 struct rpmhpd *pd = domain_to_rpmhpd(domain);
531 unsigned int corner;
532 int ret;
533
534 mutex_lock(&rpmhpd_lock);
535
536 corner = max(pd->corner, pd->enable_corner);
537 ret = rpmhpd_aggregate_corner(pd, corner);
538 if (!ret)
539 pd->enabled = true;
540
541 mutex_unlock(&rpmhpd_lock);
542
543 return ret;
544 }
545
rpmhpd_power_off(struct generic_pm_domain * domain)546 static int rpmhpd_power_off(struct generic_pm_domain *domain)
547 {
548 struct rpmhpd *pd = domain_to_rpmhpd(domain);
549 int ret;
550
551 mutex_lock(&rpmhpd_lock);
552
553 ret = rpmhpd_aggregate_corner(pd, 0);
554 if (!ret)
555 pd->enabled = false;
556
557 mutex_unlock(&rpmhpd_lock);
558
559 return ret;
560 }
561
rpmhpd_set_performance_state(struct generic_pm_domain * domain,unsigned int level)562 static int rpmhpd_set_performance_state(struct generic_pm_domain *domain,
563 unsigned int level)
564 {
565 struct rpmhpd *pd = domain_to_rpmhpd(domain);
566 int ret = 0, i;
567
568 mutex_lock(&rpmhpd_lock);
569
570 for (i = 0; i < pd->level_count; i++)
571 if (level <= pd->level[i])
572 break;
573
574 /*
575 * If the level requested is more than that supported by the
576 * max corner, just set it to max anyway.
577 */
578 if (i == pd->level_count)
579 i--;
580
581 if (pd->enabled) {
582 /* Ensure that the domain isn't turn off */
583 if (i < pd->enable_corner)
584 i = pd->enable_corner;
585
586 ret = rpmhpd_aggregate_corner(pd, i);
587 if (ret)
588 goto out;
589 }
590
591 pd->corner = i;
592 out:
593 mutex_unlock(&rpmhpd_lock);
594
595 return ret;
596 }
597
rpmhpd_get_performance_state(struct generic_pm_domain * genpd,struct dev_pm_opp * opp)598 static unsigned int rpmhpd_get_performance_state(struct generic_pm_domain *genpd,
599 struct dev_pm_opp *opp)
600 {
601 return dev_pm_opp_get_level(opp);
602 }
603
rpmhpd_update_level_mapping(struct rpmhpd * rpmhpd)604 static int rpmhpd_update_level_mapping(struct rpmhpd *rpmhpd)
605 {
606 int i;
607 const u16 *buf;
608
609 buf = cmd_db_read_aux_data(rpmhpd->res_name, &rpmhpd->level_count);
610 if (IS_ERR(buf))
611 return PTR_ERR(buf);
612
613 /* 2 bytes used for each command DB aux data entry */
614 rpmhpd->level_count >>= 1;
615
616 if (rpmhpd->level_count > RPMH_ARC_MAX_LEVELS)
617 return -EINVAL;
618
619 for (i = 0; i < rpmhpd->level_count; i++) {
620 rpmhpd->level[i] = buf[i];
621
622 /* Remember the first corner with non-zero level */
623 if (!rpmhpd->level[rpmhpd->enable_corner] && rpmhpd->level[i])
624 rpmhpd->enable_corner = i;
625
626 /*
627 * The AUX data may be zero padded. These 0 valued entries at
628 * the end of the map must be ignored.
629 */
630 if (i > 0 && rpmhpd->level[i] == 0) {
631 rpmhpd->level_count = i;
632 break;
633 }
634 pr_debug("%s: ARC hlvl=%2d --> vlvl=%4u\n", rpmhpd->res_name, i,
635 rpmhpd->level[i]);
636 }
637
638 return 0;
639 }
640
rpmhpd_probe(struct platform_device * pdev)641 static int rpmhpd_probe(struct platform_device *pdev)
642 {
643 int i, ret;
644 size_t num_pds;
645 struct device *dev = &pdev->dev;
646 struct genpd_onecell_data *data;
647 struct rpmhpd **rpmhpds;
648 const struct rpmhpd_desc *desc;
649
650 desc = of_device_get_match_data(dev);
651 if (!desc)
652 return -EINVAL;
653
654 rpmhpds = desc->rpmhpds;
655 num_pds = desc->num_pds;
656
657 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
658 if (!data)
659 return -ENOMEM;
660
661 data->domains = devm_kcalloc(dev, num_pds, sizeof(*data->domains),
662 GFP_KERNEL);
663 if (!data->domains)
664 return -ENOMEM;
665
666 data->num_domains = num_pds;
667
668 for (i = 0; i < num_pds; i++) {
669 if (!rpmhpds[i])
670 continue;
671
672 rpmhpds[i]->dev = dev;
673 rpmhpds[i]->addr = cmd_db_read_addr(rpmhpds[i]->res_name);
674 if (!rpmhpds[i]->addr) {
675 dev_err(dev, "Could not find RPMh address for resource %s\n",
676 rpmhpds[i]->res_name);
677 return -ENODEV;
678 }
679
680 ret = cmd_db_read_slave_id(rpmhpds[i]->res_name);
681 if (ret != CMD_DB_HW_ARC) {
682 dev_err(dev, "RPMh slave ID mismatch\n");
683 return -EINVAL;
684 }
685
686 ret = rpmhpd_update_level_mapping(rpmhpds[i]);
687 if (ret)
688 return ret;
689
690 rpmhpds[i]->pd.power_off = rpmhpd_power_off;
691 rpmhpds[i]->pd.power_on = rpmhpd_power_on;
692 rpmhpds[i]->pd.set_performance_state = rpmhpd_set_performance_state;
693 rpmhpds[i]->pd.opp_to_performance_state = rpmhpd_get_performance_state;
694 pm_genpd_init(&rpmhpds[i]->pd, NULL, true);
695
696 data->domains[i] = &rpmhpds[i]->pd;
697 }
698
699 /* Add subdomains */
700 for (i = 0; i < num_pds; i++) {
701 if (!rpmhpds[i])
702 continue;
703 if (rpmhpds[i]->parent)
704 pm_genpd_add_subdomain(rpmhpds[i]->parent,
705 &rpmhpds[i]->pd);
706 }
707
708 return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
709 }
710
711 static struct platform_driver rpmhpd_driver = {
712 .driver = {
713 .name = "qcom-rpmhpd",
714 .of_match_table = rpmhpd_match_table,
715 .suppress_bind_attrs = true,
716 },
717 .probe = rpmhpd_probe,
718 };
719
rpmhpd_init(void)720 static int __init rpmhpd_init(void)
721 {
722 return platform_driver_register(&rpmhpd_driver);
723 }
724 core_initcall(rpmhpd_init);
725
726 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. RPMh Power Domain Driver");
727 MODULE_LICENSE("GPL v2");
728