Commit | Line | Data |
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ad67ef68 PW |
1 | /* |
2 | * OMAP powerdomain control | |
3 | * | |
129c65ee | 4 | * Copyright (C) 2007-2008, 2011 Texas Instruments, Inc. |
694606c4 | 5 | * Copyright (C) 2007-2011 Nokia Corporation |
ad67ef68 PW |
6 | * |
7 | * Written by Paul Walmsley | |
3a759f09 | 8 | * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com> |
4788da26 | 9 | * State counting code by Tero Kristo <tero.kristo@nokia.com> |
3a759f09 | 10 | * |
ad67ef68 PW |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
33903eb5 | 15 | #undef DEBUG |
ad67ef68 PW |
16 | |
17 | #include <linux/kernel.h> | |
ad67ef68 | 18 | #include <linux/types.h> |
ad67ef68 PW |
19 | #include <linux/list.h> |
20 | #include <linux/errno.h> | |
9b7fc907 | 21 | #include <linux/string.h> |
5e7c58dc JP |
22 | #include <trace/events/power.h> |
23 | ||
59fb659b | 24 | #include "cm2xxx_3xxx.h" |
a64bb9cd | 25 | #include "prcm44xx.h" |
59fb659b PW |
26 | #include "cm44xx.h" |
27 | #include "prm2xxx_3xxx.h" | |
d198b514 | 28 | #include "prm44xx.h" |
ad67ef68 | 29 | |
5e7c58dc | 30 | #include <asm/cpu.h> |
ce491cf8 | 31 | #include <plat/cpu.h> |
72e06d08 | 32 | #include "powerdomain.h" |
1540f214 | 33 | #include "clockdomain.h" |
55ed9694 | 34 | #include <plat/prcm.h> |
ad67ef68 | 35 | |
6199ab26 PDS |
36 | #include "pm.h" |
37 | ||
5e7c58dc JP |
38 | #define PWRDM_TRACE_STATES_FLAG (1<<31) |
39 | ||
ba20bb12 PDS |
40 | enum { |
41 | PWRDM_STATE_NOW = 0, | |
42 | PWRDM_STATE_PREV, | |
43 | }; | |
44 | ||
3a759f09 | 45 | |
ad67ef68 PW |
46 | /* pwrdm_list contains all registered struct powerdomains */ |
47 | static LIST_HEAD(pwrdm_list); | |
48 | ||
3b1e8b21 RN |
49 | static struct pwrdm_ops *arch_pwrdm; |
50 | ||
ad67ef68 PW |
51 | /* Private functions */ |
52 | ||
ad67ef68 PW |
53 | static struct powerdomain *_pwrdm_lookup(const char *name) |
54 | { | |
55 | struct powerdomain *pwrdm, *temp_pwrdm; | |
56 | ||
57 | pwrdm = NULL; | |
58 | ||
59 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { | |
60 | if (!strcmp(name, temp_pwrdm->name)) { | |
61 | pwrdm = temp_pwrdm; | |
62 | break; | |
63 | } | |
64 | } | |
65 | ||
66 | return pwrdm; | |
67 | } | |
68 | ||
e909d62a PW |
69 | /** |
70 | * _pwrdm_register - register a powerdomain | |
71 | * @pwrdm: struct powerdomain * to register | |
72 | * | |
73 | * Adds a powerdomain to the internal powerdomain list. Returns | |
74 | * -EINVAL if given a null pointer, -EEXIST if a powerdomain is | |
75 | * already registered by the provided name, or 0 upon success. | |
76 | */ | |
77 | static int _pwrdm_register(struct powerdomain *pwrdm) | |
78 | { | |
79 | int i; | |
80 | ||
a64bb9cd | 81 | if (!pwrdm || !pwrdm->name) |
e909d62a PW |
82 | return -EINVAL; |
83 | ||
a64bb9cd PW |
84 | if (cpu_is_omap44xx() && |
85 | pwrdm->prcm_partition == OMAP4430_INVALID_PRCM_PARTITION) { | |
86 | pr_err("powerdomain: %s: missing OMAP4 PRCM partition ID\n", | |
87 | pwrdm->name); | |
88 | return -EINVAL; | |
89 | } | |
90 | ||
e909d62a PW |
91 | if (_pwrdm_lookup(pwrdm->name)) |
92 | return -EEXIST; | |
93 | ||
94 | list_add(&pwrdm->node, &pwrdm_list); | |
95 | ||
96 | /* Initialize the powerdomain's state counter */ | |
cf57aa7c | 97 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
e909d62a PW |
98 | pwrdm->state_counter[i] = 0; |
99 | ||
cde08f81 TG |
100 | pwrdm->ret_logic_off_counter = 0; |
101 | for (i = 0; i < pwrdm->banks; i++) | |
102 | pwrdm->ret_mem_off_counter[i] = 0; | |
103 | ||
e909d62a PW |
104 | pwrdm_wait_transition(pwrdm); |
105 | pwrdm->state = pwrdm_read_pwrst(pwrdm); | |
106 | pwrdm->state_counter[pwrdm->state] = 1; | |
107 | ||
108 | pr_debug("powerdomain: registered %s\n", pwrdm->name); | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
cde08f81 TG |
113 | static void _update_logic_membank_counters(struct powerdomain *pwrdm) |
114 | { | |
115 | int i; | |
116 | u8 prev_logic_pwrst, prev_mem_pwrst; | |
117 | ||
118 | prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm); | |
119 | if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) && | |
120 | (prev_logic_pwrst == PWRDM_POWER_OFF)) | |
121 | pwrdm->ret_logic_off_counter++; | |
122 | ||
123 | for (i = 0; i < pwrdm->banks; i++) { | |
124 | prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i); | |
125 | ||
126 | if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) && | |
127 | (prev_mem_pwrst == PWRDM_POWER_OFF)) | |
128 | pwrdm->ret_mem_off_counter[i]++; | |
129 | } | |
130 | } | |
131 | ||
ba20bb12 PDS |
132 | static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) |
133 | { | |
134 | ||
5e7c58dc | 135 | int prev, state, trace_state = 0; |
ba20bb12 PDS |
136 | |
137 | if (pwrdm == NULL) | |
138 | return -EINVAL; | |
139 | ||
140 | state = pwrdm_read_pwrst(pwrdm); | |
141 | ||
142 | switch (flag) { | |
143 | case PWRDM_STATE_NOW: | |
144 | prev = pwrdm->state; | |
145 | break; | |
146 | case PWRDM_STATE_PREV: | |
147 | prev = pwrdm_read_prev_pwrst(pwrdm); | |
148 | if (pwrdm->state != prev) | |
149 | pwrdm->state_counter[prev]++; | |
cde08f81 TG |
150 | if (prev == PWRDM_POWER_RET) |
151 | _update_logic_membank_counters(pwrdm); | |
5e7c58dc JP |
152 | /* |
153 | * If the power domain did not hit the desired state, | |
154 | * generate a trace event with both the desired and hit states | |
155 | */ | |
156 | if (state != prev) { | |
157 | trace_state = (PWRDM_TRACE_STATES_FLAG | | |
158 | ((state & OMAP_POWERSTATE_MASK) << 8) | | |
159 | ((prev & OMAP_POWERSTATE_MASK) << 0)); | |
160 | trace_power_domain_target(pwrdm->name, trace_state, | |
161 | smp_processor_id()); | |
162 | } | |
ba20bb12 PDS |
163 | break; |
164 | default: | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
168 | if (state != prev) | |
169 | pwrdm->state_counter[state]++; | |
170 | ||
6199ab26 PDS |
171 | pm_dbg_update_time(pwrdm, prev); |
172 | ||
ba20bb12 PDS |
173 | pwrdm->state = state; |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
6199ab26 | 178 | static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
179 | { |
180 | pwrdm_clear_all_prev_pwrst(pwrdm); | |
181 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
182 | return 0; | |
183 | } | |
184 | ||
6199ab26 | 185 | static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
186 | { |
187 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV); | |
188 | return 0; | |
189 | } | |
190 | ||
ad67ef68 PW |
191 | /* Public functions */ |
192 | ||
193 | /** | |
129c65ee PW |
194 | * pwrdm_register_platform_funcs - register powerdomain implementation fns |
195 | * @po: func pointers for arch specific implementations | |
ad67ef68 | 196 | * |
129c65ee PW |
197 | * Register the list of function pointers used to implement the |
198 | * powerdomain functions on different OMAP SoCs. Should be called | |
199 | * before any other pwrdm_register*() function. Returns -EINVAL if | |
200 | * @po is null, -EEXIST if platform functions have already been | |
201 | * registered, or 0 upon success. | |
ad67ef68 | 202 | */ |
129c65ee PW |
203 | int pwrdm_register_platform_funcs(struct pwrdm_ops *po) |
204 | { | |
205 | if (!po) | |
206 | return -EINVAL; | |
207 | ||
208 | if (arch_pwrdm) | |
209 | return -EEXIST; | |
210 | ||
211 | arch_pwrdm = po; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | /** | |
217 | * pwrdm_register_pwrdms - register SoC powerdomains | |
218 | * @ps: pointer to an array of struct powerdomain to register | |
219 | * | |
220 | * Register the powerdomains available on a particular OMAP SoC. Must | |
221 | * be called after pwrdm_register_platform_funcs(). May be called | |
222 | * multiple times. Returns -EACCES if called before | |
223 | * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is | |
224 | * null; or 0 upon success. | |
225 | */ | |
226 | int pwrdm_register_pwrdms(struct powerdomain **ps) | |
ad67ef68 PW |
227 | { |
228 | struct powerdomain **p = NULL; | |
229 | ||
129c65ee PW |
230 | if (!arch_pwrdm) |
231 | return -EEXIST; | |
3b1e8b21 | 232 | |
129c65ee PW |
233 | if (!ps) |
234 | return -EINVAL; | |
235 | ||
236 | for (p = ps; *p; p++) | |
237 | _pwrdm_register(*p); | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | /** | |
243 | * pwrdm_complete_init - set up the powerdomain layer | |
244 | * | |
245 | * Do whatever is necessary to initialize registered powerdomains and | |
246 | * powerdomain code. Currently, this programs the next power state | |
247 | * for each powerdomain to ON. This prevents powerdomains from | |
248 | * unexpectedly losing context or entering high wakeup latency modes | |
249 | * with non-power-management-enabled kernels. Must be called after | |
250 | * pwrdm_register_pwrdms(). Returns -EACCES if called before | |
251 | * pwrdm_register_pwrdms(), or 0 upon success. | |
252 | */ | |
253 | int pwrdm_complete_init(void) | |
254 | { | |
255 | struct powerdomain *temp_p; | |
256 | ||
257 | if (list_empty(&pwrdm_list)) | |
258 | return -EACCES; | |
c956b753 RN |
259 | |
260 | list_for_each_entry(temp_p, &pwrdm_list, node) | |
261 | pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON); | |
129c65ee PW |
262 | |
263 | return 0; | |
ad67ef68 PW |
264 | } |
265 | ||
266 | /** | |
267 | * pwrdm_lookup - look up a powerdomain by name, return a pointer | |
268 | * @name: name of powerdomain | |
269 | * | |
f0271d65 PW |
270 | * Find a registered powerdomain by its name @name. Returns a pointer |
271 | * to the struct powerdomain if found, or NULL otherwise. | |
ad67ef68 PW |
272 | */ |
273 | struct powerdomain *pwrdm_lookup(const char *name) | |
274 | { | |
275 | struct powerdomain *pwrdm; | |
ad67ef68 PW |
276 | |
277 | if (!name) | |
278 | return NULL; | |
279 | ||
ad67ef68 | 280 | pwrdm = _pwrdm_lookup(name); |
ad67ef68 PW |
281 | |
282 | return pwrdm; | |
283 | } | |
284 | ||
285 | /** | |
e909d62a | 286 | * pwrdm_for_each - call function on each registered clockdomain |
ad67ef68 PW |
287 | * @fn: callback function * |
288 | * | |
f0271d65 PW |
289 | * Call the supplied function @fn for each registered powerdomain. |
290 | * The callback function @fn can return anything but 0 to bail out | |
291 | * early from the iterator. Returns the last return value of the | |
292 | * callback function, which should be 0 for success or anything else | |
293 | * to indicate failure; or -EINVAL if the function pointer is null. | |
ad67ef68 | 294 | */ |
e909d62a PW |
295 | int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), |
296 | void *user) | |
ad67ef68 PW |
297 | { |
298 | struct powerdomain *temp_pwrdm; | |
ad67ef68 PW |
299 | int ret = 0; |
300 | ||
301 | if (!fn) | |
302 | return -EINVAL; | |
303 | ||
ad67ef68 | 304 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
6199ab26 | 305 | ret = (*fn)(temp_pwrdm, user); |
ad67ef68 PW |
306 | if (ret) |
307 | break; | |
308 | } | |
ee894b18 AB |
309 | |
310 | return ret; | |
311 | } | |
312 | ||
8420bb13 PW |
313 | /** |
314 | * pwrdm_add_clkdm - add a clockdomain to a powerdomain | |
315 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
316 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
317 | * | |
f0271d65 | 318 | * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This |
8420bb13 PW |
319 | * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if |
320 | * presented with invalid pointers; -ENOMEM if memory could not be allocated; | |
321 | * or 0 upon success. | |
322 | */ | |
323 | int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
324 | { | |
8420bb13 PW |
325 | int i; |
326 | int ret = -EINVAL; | |
327 | ||
328 | if (!pwrdm || !clkdm) | |
329 | return -EINVAL; | |
330 | ||
331 | pr_debug("powerdomain: associating clockdomain %s with powerdomain " | |
332 | "%s\n", clkdm->name, pwrdm->name); | |
333 | ||
8420bb13 PW |
334 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { |
335 | if (!pwrdm->pwrdm_clkdms[i]) | |
336 | break; | |
337 | #ifdef DEBUG | |
338 | if (pwrdm->pwrdm_clkdms[i] == clkdm) { | |
339 | ret = -EINVAL; | |
340 | goto pac_exit; | |
341 | } | |
342 | #endif | |
343 | } | |
344 | ||
345 | if (i == PWRDM_MAX_CLKDMS) { | |
346 | pr_debug("powerdomain: increase PWRDM_MAX_CLKDMS for " | |
347 | "pwrdm %s clkdm %s\n", pwrdm->name, clkdm->name); | |
348 | WARN_ON(1); | |
349 | ret = -ENOMEM; | |
350 | goto pac_exit; | |
351 | } | |
352 | ||
353 | pwrdm->pwrdm_clkdms[i] = clkdm; | |
354 | ||
355 | ret = 0; | |
356 | ||
357 | pac_exit: | |
8420bb13 PW |
358 | return ret; |
359 | } | |
360 | ||
361 | /** | |
362 | * pwrdm_del_clkdm - remove a clockdomain from a powerdomain | |
363 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
364 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
365 | * | |
f0271d65 PW |
366 | * Dissociate the clockdomain @clkdm from the powerdomain |
367 | * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT | |
368 | * if @clkdm was not associated with the powerdomain, or 0 upon | |
369 | * success. | |
8420bb13 PW |
370 | */ |
371 | int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
372 | { | |
8420bb13 PW |
373 | int ret = -EINVAL; |
374 | int i; | |
375 | ||
376 | if (!pwrdm || !clkdm) | |
377 | return -EINVAL; | |
378 | ||
379 | pr_debug("powerdomain: dissociating clockdomain %s from powerdomain " | |
380 | "%s\n", clkdm->name, pwrdm->name); | |
381 | ||
8420bb13 PW |
382 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) |
383 | if (pwrdm->pwrdm_clkdms[i] == clkdm) | |
384 | break; | |
385 | ||
386 | if (i == PWRDM_MAX_CLKDMS) { | |
387 | pr_debug("powerdomain: clkdm %s not associated with pwrdm " | |
388 | "%s ?!\n", clkdm->name, pwrdm->name); | |
389 | ret = -ENOENT; | |
390 | goto pdc_exit; | |
391 | } | |
392 | ||
393 | pwrdm->pwrdm_clkdms[i] = NULL; | |
394 | ||
395 | ret = 0; | |
396 | ||
397 | pdc_exit: | |
8420bb13 PW |
398 | return ret; |
399 | } | |
400 | ||
401 | /** | |
402 | * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm | |
403 | * @pwrdm: struct powerdomain * to iterate over | |
404 | * @fn: callback function * | |
405 | * | |
f0271d65 PW |
406 | * Call the supplied function @fn for each clockdomain in the powerdomain |
407 | * @pwrdm. The callback function can return anything but 0 to bail | |
e909d62a PW |
408 | * out early from the iterator. Returns -EINVAL if presented with |
409 | * invalid pointers; or passes along the last return value of the | |
410 | * callback function, which should be 0 for success or anything else | |
411 | * to indicate failure. | |
8420bb13 PW |
412 | */ |
413 | int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, | |
414 | int (*fn)(struct powerdomain *pwrdm, | |
415 | struct clockdomain *clkdm)) | |
416 | { | |
8420bb13 PW |
417 | int ret = 0; |
418 | int i; | |
419 | ||
420 | if (!fn) | |
421 | return -EINVAL; | |
422 | ||
8420bb13 PW |
423 | for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++) |
424 | ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]); | |
425 | ||
8420bb13 PW |
426 | return ret; |
427 | } | |
428 | ||
ad67ef68 PW |
429 | /** |
430 | * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain | |
431 | * @pwrdm: struct powerdomain * | |
432 | * | |
f0271d65 | 433 | * Return the number of controllable memory banks in powerdomain @pwrdm, |
ad67ef68 PW |
434 | * starting with 1. Returns -EINVAL if the powerdomain pointer is null. |
435 | */ | |
436 | int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm) | |
437 | { | |
438 | if (!pwrdm) | |
439 | return -EINVAL; | |
440 | ||
441 | return pwrdm->banks; | |
442 | } | |
443 | ||
444 | /** | |
445 | * pwrdm_set_next_pwrst - set next powerdomain power state | |
446 | * @pwrdm: struct powerdomain * to set | |
447 | * @pwrst: one of the PWRDM_POWER_* macros | |
448 | * | |
f0271d65 | 449 | * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain |
ad67ef68 PW |
450 | * may not enter this state immediately if the preconditions for this state |
451 | * have not been satisfied. Returns -EINVAL if the powerdomain pointer is | |
452 | * null or if the power state is invalid for the powerdomin, or returns 0 | |
453 | * upon success. | |
454 | */ | |
455 | int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) | |
456 | { | |
f327e07b RN |
457 | int ret = -EINVAL; |
458 | ||
ad67ef68 PW |
459 | if (!pwrdm) |
460 | return -EINVAL; | |
461 | ||
462 | if (!(pwrdm->pwrsts & (1 << pwrst))) | |
463 | return -EINVAL; | |
464 | ||
465 | pr_debug("powerdomain: setting next powerstate for %s to %0x\n", | |
466 | pwrdm->name, pwrst); | |
467 | ||
5e7c58dc JP |
468 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { |
469 | /* Trace the pwrdm desired target state */ | |
470 | trace_power_domain_target(pwrdm->name, pwrst, | |
471 | smp_processor_id()); | |
472 | /* Program the pwrdm desired target state */ | |
f327e07b | 473 | ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); |
5e7c58dc | 474 | } |
ad67ef68 | 475 | |
f327e07b | 476 | return ret; |
ad67ef68 PW |
477 | } |
478 | ||
479 | /** | |
480 | * pwrdm_read_next_pwrst - get next powerdomain power state | |
481 | * @pwrdm: struct powerdomain * to get power state | |
482 | * | |
f0271d65 | 483 | * Return the powerdomain @pwrdm's next power state. Returns -EINVAL |
ad67ef68 PW |
484 | * if the powerdomain pointer is null or returns the next power state |
485 | * upon success. | |
486 | */ | |
487 | int pwrdm_read_next_pwrst(struct powerdomain *pwrdm) | |
488 | { | |
f327e07b RN |
489 | int ret = -EINVAL; |
490 | ||
ad67ef68 PW |
491 | if (!pwrdm) |
492 | return -EINVAL; | |
493 | ||
f327e07b RN |
494 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst) |
495 | ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm); | |
496 | ||
497 | return ret; | |
ad67ef68 PW |
498 | } |
499 | ||
500 | /** | |
501 | * pwrdm_read_pwrst - get current powerdomain power state | |
502 | * @pwrdm: struct powerdomain * to get power state | |
503 | * | |
f0271d65 | 504 | * Return the powerdomain @pwrdm's current power state. Returns -EINVAL |
ad67ef68 PW |
505 | * if the powerdomain pointer is null or returns the current power state |
506 | * upon success. | |
507 | */ | |
508 | int pwrdm_read_pwrst(struct powerdomain *pwrdm) | |
509 | { | |
f327e07b RN |
510 | int ret = -EINVAL; |
511 | ||
ad67ef68 PW |
512 | if (!pwrdm) |
513 | return -EINVAL; | |
514 | ||
f327e07b RN |
515 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst) |
516 | ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm); | |
517 | ||
518 | return ret; | |
ad67ef68 PW |
519 | } |
520 | ||
521 | /** | |
522 | * pwrdm_read_prev_pwrst - get previous powerdomain power state | |
523 | * @pwrdm: struct powerdomain * to get previous power state | |
524 | * | |
f0271d65 | 525 | * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL |
ad67ef68 PW |
526 | * if the powerdomain pointer is null or returns the previous power state |
527 | * upon success. | |
528 | */ | |
529 | int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) | |
530 | { | |
f327e07b RN |
531 | int ret = -EINVAL; |
532 | ||
ad67ef68 PW |
533 | if (!pwrdm) |
534 | return -EINVAL; | |
535 | ||
f327e07b RN |
536 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst) |
537 | ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm); | |
538 | ||
539 | return ret; | |
ad67ef68 PW |
540 | } |
541 | ||
542 | /** | |
543 | * pwrdm_set_logic_retst - set powerdomain logic power state upon retention | |
544 | * @pwrdm: struct powerdomain * to set | |
545 | * @pwrst: one of the PWRDM_POWER_* macros | |
546 | * | |
f0271d65 PW |
547 | * Set the next power state @pwrst that the logic portion of the |
548 | * powerdomain @pwrdm will enter when the powerdomain enters retention. | |
549 | * This will be either RETENTION or OFF, if supported. Returns | |
550 | * -EINVAL if the powerdomain pointer is null or the target power | |
551 | * state is not not supported, or returns 0 upon success. | |
ad67ef68 PW |
552 | */ |
553 | int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) | |
554 | { | |
12627578 | 555 | int ret = -EINVAL; |
2bc4ef71 | 556 | |
ad67ef68 PW |
557 | if (!pwrdm) |
558 | return -EINVAL; | |
559 | ||
560 | if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) | |
561 | return -EINVAL; | |
562 | ||
563 | pr_debug("powerdomain: setting next logic powerstate for %s to %0x\n", | |
564 | pwrdm->name, pwrst); | |
565 | ||
12627578 RN |
566 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst) |
567 | ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst); | |
ad67ef68 | 568 | |
12627578 | 569 | return ret; |
ad67ef68 PW |
570 | } |
571 | ||
572 | /** | |
573 | * pwrdm_set_mem_onst - set memory power state while powerdomain ON | |
574 | * @pwrdm: struct powerdomain * to set | |
575 | * @bank: memory bank number to set (0-3) | |
576 | * @pwrst: one of the PWRDM_POWER_* macros | |
577 | * | |
f0271d65 PW |
578 | * Set the next power state @pwrst that memory bank @bank of the |
579 | * powerdomain @pwrdm will enter when the powerdomain enters the ON | |
580 | * state. @bank will be a number from 0 to 3, and represents different | |
581 | * types of memory, depending on the powerdomain. Returns -EINVAL if | |
582 | * the powerdomain pointer is null or the target power state is not | |
583 | * not supported for this memory bank, -EEXIST if the target memory | |
584 | * bank does not exist or is not controllable, or returns 0 upon | |
585 | * success. | |
ad67ef68 PW |
586 | */ |
587 | int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
588 | { | |
9b7fc907 | 589 | int ret = -EINVAL; |
ad67ef68 PW |
590 | |
591 | if (!pwrdm) | |
592 | return -EINVAL; | |
593 | ||
594 | if (pwrdm->banks < (bank + 1)) | |
595 | return -EEXIST; | |
596 | ||
597 | if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) | |
598 | return -EINVAL; | |
599 | ||
600 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
601 | "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst); | |
602 | ||
9b7fc907 RN |
603 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) |
604 | ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); | |
ad67ef68 | 605 | |
9b7fc907 | 606 | return ret; |
ad67ef68 PW |
607 | } |
608 | ||
609 | /** | |
610 | * pwrdm_set_mem_retst - set memory power state while powerdomain in RET | |
611 | * @pwrdm: struct powerdomain * to set | |
612 | * @bank: memory bank number to set (0-3) | |
613 | * @pwrst: one of the PWRDM_POWER_* macros | |
614 | * | |
f0271d65 PW |
615 | * Set the next power state @pwrst that memory bank @bank of the |
616 | * powerdomain @pwrdm will enter when the powerdomain enters the | |
617 | * RETENTION state. Bank will be a number from 0 to 3, and represents | |
618 | * different types of memory, depending on the powerdomain. @pwrst | |
619 | * will be either RETENTION or OFF, if supported. Returns -EINVAL if | |
620 | * the powerdomain pointer is null or the target power state is not | |
621 | * not supported for this memory bank, -EEXIST if the target memory | |
622 | * bank does not exist or is not controllable, or returns 0 upon | |
623 | * success. | |
ad67ef68 PW |
624 | */ |
625 | int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
626 | { | |
9b7fc907 | 627 | int ret = -EINVAL; |
ad67ef68 PW |
628 | |
629 | if (!pwrdm) | |
630 | return -EINVAL; | |
631 | ||
632 | if (pwrdm->banks < (bank + 1)) | |
633 | return -EEXIST; | |
634 | ||
635 | if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) | |
636 | return -EINVAL; | |
637 | ||
638 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
639 | "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst); | |
640 | ||
9b7fc907 RN |
641 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) |
642 | ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); | |
ad67ef68 | 643 | |
9b7fc907 | 644 | return ret; |
ad67ef68 PW |
645 | } |
646 | ||
647 | /** | |
648 | * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state | |
649 | * @pwrdm: struct powerdomain * to get current logic retention power state | |
650 | * | |
f0271d65 PW |
651 | * Return the power state that the logic portion of powerdomain @pwrdm |
652 | * will enter when the powerdomain enters retention. Returns -EINVAL | |
653 | * if the powerdomain pointer is null or returns the logic retention | |
654 | * power state upon success. | |
ad67ef68 PW |
655 | */ |
656 | int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) | |
657 | { | |
12627578 RN |
658 | int ret = -EINVAL; |
659 | ||
ad67ef68 PW |
660 | if (!pwrdm) |
661 | return -EINVAL; | |
662 | ||
12627578 RN |
663 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst) |
664 | ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm); | |
665 | ||
666 | return ret; | |
ad67ef68 PW |
667 | } |
668 | ||
669 | /** | |
670 | * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state | |
671 | * @pwrdm: struct powerdomain * to get previous logic power state | |
672 | * | |
f0271d65 PW |
673 | * Return the powerdomain @pwrdm's previous logic power state. Returns |
674 | * -EINVAL if the powerdomain pointer is null or returns the previous | |
675 | * logic power state upon success. | |
ad67ef68 PW |
676 | */ |
677 | int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) | |
678 | { | |
12627578 RN |
679 | int ret = -EINVAL; |
680 | ||
ad67ef68 PW |
681 | if (!pwrdm) |
682 | return -EINVAL; | |
683 | ||
12627578 RN |
684 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst) |
685 | ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm); | |
686 | ||
687 | return ret; | |
ad67ef68 PW |
688 | } |
689 | ||
1e3d0d2b TG |
690 | /** |
691 | * pwrdm_read_logic_retst - get next powerdomain logic power state | |
692 | * @pwrdm: struct powerdomain * to get next logic power state | |
693 | * | |
694 | * Return the powerdomain pwrdm's logic power state. Returns -EINVAL | |
695 | * if the powerdomain pointer is null or returns the next logic | |
696 | * power state upon success. | |
697 | */ | |
698 | int pwrdm_read_logic_retst(struct powerdomain *pwrdm) | |
699 | { | |
12627578 RN |
700 | int ret = -EINVAL; |
701 | ||
1e3d0d2b TG |
702 | if (!pwrdm) |
703 | return -EINVAL; | |
704 | ||
12627578 RN |
705 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst) |
706 | ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm); | |
707 | ||
708 | return ret; | |
1e3d0d2b TG |
709 | } |
710 | ||
ad67ef68 PW |
711 | /** |
712 | * pwrdm_read_mem_pwrst - get current memory bank power state | |
713 | * @pwrdm: struct powerdomain * to get current memory bank power state | |
714 | * @bank: memory bank number (0-3) | |
715 | * | |
f0271d65 PW |
716 | * Return the powerdomain @pwrdm's current memory power state for bank |
717 | * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
ad67ef68 PW |
718 | * the target memory bank does not exist or is not controllable, or |
719 | * returns the current memory power state upon success. | |
720 | */ | |
721 | int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
722 | { | |
9b7fc907 | 723 | int ret = -EINVAL; |
ad67ef68 PW |
724 | |
725 | if (!pwrdm) | |
9b7fc907 | 726 | return ret; |
ad67ef68 PW |
727 | |
728 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 729 | return ret; |
ad67ef68 | 730 | |
3863c74b TG |
731 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
732 | bank = 1; | |
733 | ||
9b7fc907 RN |
734 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) |
735 | ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 736 | |
9b7fc907 | 737 | return ret; |
ad67ef68 PW |
738 | } |
739 | ||
740 | /** | |
741 | * pwrdm_read_prev_mem_pwrst - get previous memory bank power state | |
742 | * @pwrdm: struct powerdomain * to get previous memory bank power state | |
743 | * @bank: memory bank number (0-3) | |
744 | * | |
f0271d65 PW |
745 | * Return the powerdomain @pwrdm's previous memory power state for |
746 | * bank @bank. Returns -EINVAL if the powerdomain pointer is null, | |
747 | * -EEXIST if the target memory bank does not exist or is not | |
748 | * controllable, or returns the previous memory power state upon | |
749 | * success. | |
ad67ef68 PW |
750 | */ |
751 | int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
752 | { | |
9b7fc907 | 753 | int ret = -EINVAL; |
ad67ef68 PW |
754 | |
755 | if (!pwrdm) | |
9b7fc907 | 756 | return ret; |
ad67ef68 PW |
757 | |
758 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 759 | return ret; |
ad67ef68 | 760 | |
3863c74b TG |
761 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
762 | bank = 1; | |
763 | ||
9b7fc907 RN |
764 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) |
765 | ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 766 | |
9b7fc907 | 767 | return ret; |
ad67ef68 PW |
768 | } |
769 | ||
1e3d0d2b TG |
770 | /** |
771 | * pwrdm_read_mem_retst - get next memory bank power state | |
772 | * @pwrdm: struct powerdomain * to get mext memory bank power state | |
773 | * @bank: memory bank number (0-3) | |
774 | * | |
775 | * Return the powerdomain pwrdm's next memory power state for bank | |
776 | * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
777 | * the target memory bank does not exist or is not controllable, or | |
778 | * returns the next memory power state upon success. | |
779 | */ | |
780 | int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) | |
781 | { | |
9b7fc907 | 782 | int ret = -EINVAL; |
1e3d0d2b TG |
783 | |
784 | if (!pwrdm) | |
9b7fc907 | 785 | return ret; |
1e3d0d2b TG |
786 | |
787 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 788 | return ret; |
1e3d0d2b | 789 | |
9b7fc907 RN |
790 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) |
791 | ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); | |
1e3d0d2b | 792 | |
9b7fc907 | 793 | return ret; |
1e3d0d2b TG |
794 | } |
795 | ||
ad67ef68 PW |
796 | /** |
797 | * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm | |
798 | * @pwrdm: struct powerdomain * to clear | |
799 | * | |
f0271d65 PW |
800 | * Clear the powerdomain's previous power state register @pwrdm. |
801 | * Clears the entire register, including logic and memory bank | |
802 | * previous power states. Returns -EINVAL if the powerdomain pointer | |
803 | * is null, or returns 0 upon success. | |
ad67ef68 PW |
804 | */ |
805 | int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) | |
806 | { | |
9b7fc907 RN |
807 | int ret = -EINVAL; |
808 | ||
ad67ef68 | 809 | if (!pwrdm) |
9b7fc907 | 810 | return ret; |
ad67ef68 PW |
811 | |
812 | /* | |
813 | * XXX should get the powerdomain's current state here; | |
814 | * warn & fail if it is not ON. | |
815 | */ | |
816 | ||
817 | pr_debug("powerdomain: clearing previous power state reg for %s\n", | |
818 | pwrdm->name); | |
819 | ||
9b7fc907 RN |
820 | if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) |
821 | ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); | |
ad67ef68 | 822 | |
9b7fc907 | 823 | return ret; |
ad67ef68 PW |
824 | } |
825 | ||
0b7cbfb5 PW |
826 | /** |
827 | * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm | |
828 | * @pwrdm: struct powerdomain * | |
829 | * | |
830 | * Enable automatic context save-and-restore upon power state change | |
f0271d65 PW |
831 | * for some devices in the powerdomain @pwrdm. Warning: this only |
832 | * affects a subset of devices in a powerdomain; check the TRM | |
833 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
834 | * the powerdomain does not support automatic save-and-restore, or | |
835 | * returns 0 upon success. | |
0b7cbfb5 PW |
836 | */ |
837 | int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) | |
838 | { | |
9b7fc907 RN |
839 | int ret = -EINVAL; |
840 | ||
0b7cbfb5 | 841 | if (!pwrdm) |
9b7fc907 | 842 | return ret; |
0b7cbfb5 PW |
843 | |
844 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 845 | return ret; |
0b7cbfb5 PW |
846 | |
847 | pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", | |
848 | pwrdm->name); | |
849 | ||
9b7fc907 RN |
850 | if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) |
851 | ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 852 | |
9b7fc907 | 853 | return ret; |
0b7cbfb5 PW |
854 | } |
855 | ||
856 | /** | |
857 | * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm | |
858 | * @pwrdm: struct powerdomain * | |
859 | * | |
860 | * Disable automatic context save-and-restore upon power state change | |
f0271d65 PW |
861 | * for some devices in the powerdomain @pwrdm. Warning: this only |
862 | * affects a subset of devices in a powerdomain; check the TRM | |
863 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
864 | * the powerdomain does not support automatic save-and-restore, or | |
865 | * returns 0 upon success. | |
0b7cbfb5 PW |
866 | */ |
867 | int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) | |
868 | { | |
9b7fc907 RN |
869 | int ret = -EINVAL; |
870 | ||
0b7cbfb5 | 871 | if (!pwrdm) |
9b7fc907 | 872 | return ret; |
0b7cbfb5 PW |
873 | |
874 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 875 | return ret; |
0b7cbfb5 PW |
876 | |
877 | pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", | |
878 | pwrdm->name); | |
879 | ||
9b7fc907 RN |
880 | if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) |
881 | ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 882 | |
9b7fc907 | 883 | return ret; |
0b7cbfb5 PW |
884 | } |
885 | ||
886 | /** | |
887 | * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR | |
888 | * @pwrdm: struct powerdomain * | |
889 | * | |
f0271d65 | 890 | * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore |
0b7cbfb5 PW |
891 | * for some devices, or 0 if it does not. |
892 | */ | |
893 | bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) | |
894 | { | |
895 | return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0; | |
896 | } | |
897 | ||
90dbc7b0 RN |
898 | /** |
899 | * pwrdm_set_lowpwrstchange - Request a low power state change | |
900 | * @pwrdm: struct powerdomain * | |
901 | * | |
902 | * Allows a powerdomain to transtion to a lower power sleep state | |
903 | * from an existing sleep state without waking up the powerdomain. | |
904 | * Returns -EINVAL if the powerdomain pointer is null or if the | |
905 | * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0 | |
906 | * upon success. | |
907 | */ | |
908 | int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) | |
909 | { | |
9b7fc907 RN |
910 | int ret = -EINVAL; |
911 | ||
90dbc7b0 RN |
912 | if (!pwrdm) |
913 | return -EINVAL; | |
914 | ||
915 | if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) | |
916 | return -EINVAL; | |
917 | ||
918 | pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n", | |
919 | pwrdm->name); | |
920 | ||
9b7fc907 RN |
921 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange) |
922 | ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); | |
90dbc7b0 | 923 | |
9b7fc907 | 924 | return ret; |
90dbc7b0 RN |
925 | } |
926 | ||
ad67ef68 PW |
927 | /** |
928 | * pwrdm_wait_transition - wait for powerdomain power transition to finish | |
929 | * @pwrdm: struct powerdomain * to wait for | |
930 | * | |
f0271d65 | 931 | * If the powerdomain @pwrdm is in the process of a state transition, |
ad67ef68 PW |
932 | * spin until it completes the power transition, or until an iteration |
933 | * bailout value is reached. Returns -EINVAL if the powerdomain | |
934 | * pointer is null, -EAGAIN if the bailout value was reached, or | |
935 | * returns 0 upon success. | |
936 | */ | |
937 | int pwrdm_wait_transition(struct powerdomain *pwrdm) | |
938 | { | |
9b7fc907 | 939 | int ret = -EINVAL; |
ad67ef68 PW |
940 | |
941 | if (!pwrdm) | |
942 | return -EINVAL; | |
943 | ||
9b7fc907 RN |
944 | if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition) |
945 | ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); | |
ad67ef68 | 946 | |
9b7fc907 | 947 | return ret; |
ad67ef68 PW |
948 | } |
949 | ||
ba20bb12 PDS |
950 | int pwrdm_state_switch(struct powerdomain *pwrdm) |
951 | { | |
952 | return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
953 | } | |
954 | ||
955 | int pwrdm_clkdm_state_switch(struct clockdomain *clkdm) | |
956 | { | |
957 | if (clkdm != NULL && clkdm->pwrdm.ptr != NULL) { | |
958 | pwrdm_wait_transition(clkdm->pwrdm.ptr); | |
959 | return pwrdm_state_switch(clkdm->pwrdm.ptr); | |
960 | } | |
961 | ||
962 | return -EINVAL; | |
963 | } | |
ba20bb12 PDS |
964 | |
965 | int pwrdm_pre_transition(void) | |
966 | { | |
6199ab26 | 967 | pwrdm_for_each(_pwrdm_pre_transition_cb, NULL); |
ba20bb12 PDS |
968 | return 0; |
969 | } | |
970 | ||
971 | int pwrdm_post_transition(void) | |
972 | { | |
6199ab26 | 973 | pwrdm_for_each(_pwrdm_post_transition_cb, NULL); |
ba20bb12 PDS |
974 | return 0; |
975 | } | |
7f595674 KH |
976 | |
977 | /** | |
978 | * pwrdm_get_context_loss_count - get powerdomain's context loss count | |
979 | * @pwrdm: struct powerdomain * to wait for | |
980 | * | |
981 | * Context loss count is the sum of powerdomain off-mode counter, the | |
982 | * logic off counter and the per-bank memory off counter. Returns 0 | |
983 | * (and WARNs) upon error, otherwise, returns the context loss count. | |
984 | */ | |
985 | u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm) | |
986 | { | |
987 | int i, count; | |
988 | ||
989 | if (!pwrdm) { | |
990 | WARN(1, "powerdomain: %s: pwrdm is null\n", __func__); | |
991 | return 0; | |
992 | } | |
993 | ||
994 | count = pwrdm->state_counter[PWRDM_POWER_OFF]; | |
995 | count += pwrdm->ret_logic_off_counter; | |
996 | ||
997 | for (i = 0; i < pwrdm->banks; i++) | |
998 | count += pwrdm->ret_mem_off_counter[i]; | |
999 | ||
1000 | pr_debug("powerdomain: %s: context loss count = %u\n", | |
1001 | pwrdm->name, count); | |
1002 | ||
1003 | return count; | |
1004 | } | |
694606c4 PW |
1005 | |
1006 | /** | |
1007 | * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? | |
1008 | * @pwrdm: struct powerdomain * | |
1009 | * | |
1010 | * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain | |
1011 | * can lose either memory or logic context or if @pwrdm is invalid, or | |
1012 | * returns 0 otherwise. This function is not concerned with how the | |
1013 | * powerdomain registers are programmed (i.e., to go off or not); it's | |
1014 | * concerned with whether it's ever possible for this powerdomain to | |
1015 | * go off while some other part of the chip is active. This function | |
1016 | * assumes that every powerdomain can go to either ON or INACTIVE. | |
1017 | */ | |
1018 | bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) | |
1019 | { | |
1020 | int i; | |
1021 | ||
1022 | if (IS_ERR_OR_NULL(pwrdm)) { | |
1023 | pr_debug("powerdomain: %s: invalid powerdomain pointer\n", | |
1024 | __func__); | |
1025 | return 1; | |
1026 | } | |
1027 | ||
1028 | if (pwrdm->pwrsts & PWRSTS_OFF) | |
1029 | return 1; | |
1030 | ||
1031 | if (pwrdm->pwrsts & PWRSTS_RET) { | |
1032 | if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) | |
1033 | return 1; | |
1034 | ||
1035 | for (i = 0; i < pwrdm->banks; i++) | |
1036 | if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) | |
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | for (i = 0; i < pwrdm->banks; i++) | |
1041 | if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) | |
1042 | return 1; | |
1043 | ||
1044 | return 0; | |
1045 | } |