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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; | |
048a7034 | 80 | struct voltagedomain *voltdm; |
e909d62a | 81 | |
a64bb9cd | 82 | if (!pwrdm || !pwrdm->name) |
e909d62a PW |
83 | return -EINVAL; |
84 | ||
a64bb9cd PW |
85 | if (cpu_is_omap44xx() && |
86 | pwrdm->prcm_partition == OMAP4430_INVALID_PRCM_PARTITION) { | |
87 | pr_err("powerdomain: %s: missing OMAP4 PRCM partition ID\n", | |
88 | pwrdm->name); | |
89 | return -EINVAL; | |
90 | } | |
91 | ||
e909d62a PW |
92 | if (_pwrdm_lookup(pwrdm->name)) |
93 | return -EEXIST; | |
94 | ||
048a7034 KH |
95 | voltdm = voltdm_lookup(pwrdm->voltdm.name); |
96 | if (!voltdm) { | |
97 | pr_err("powerdomain: %s: voltagedomain %s does not exist\n", | |
98 | pwrdm->name, pwrdm->voltdm.name); | |
99 | return -EINVAL; | |
100 | } | |
101 | pwrdm->voltdm.ptr = voltdm; | |
102 | ||
e909d62a PW |
103 | list_add(&pwrdm->node, &pwrdm_list); |
104 | ||
105 | /* Initialize the powerdomain's state counter */ | |
cf57aa7c | 106 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
e909d62a PW |
107 | pwrdm->state_counter[i] = 0; |
108 | ||
cde08f81 TG |
109 | pwrdm->ret_logic_off_counter = 0; |
110 | for (i = 0; i < pwrdm->banks; i++) | |
111 | pwrdm->ret_mem_off_counter[i] = 0; | |
112 | ||
e909d62a PW |
113 | pwrdm_wait_transition(pwrdm); |
114 | pwrdm->state = pwrdm_read_pwrst(pwrdm); | |
115 | pwrdm->state_counter[pwrdm->state] = 1; | |
116 | ||
117 | pr_debug("powerdomain: registered %s\n", pwrdm->name); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
cde08f81 TG |
122 | static void _update_logic_membank_counters(struct powerdomain *pwrdm) |
123 | { | |
124 | int i; | |
125 | u8 prev_logic_pwrst, prev_mem_pwrst; | |
126 | ||
127 | prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm); | |
128 | if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) && | |
129 | (prev_logic_pwrst == PWRDM_POWER_OFF)) | |
130 | pwrdm->ret_logic_off_counter++; | |
131 | ||
132 | for (i = 0; i < pwrdm->banks; i++) { | |
133 | prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i); | |
134 | ||
135 | if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) && | |
136 | (prev_mem_pwrst == PWRDM_POWER_OFF)) | |
137 | pwrdm->ret_mem_off_counter[i]++; | |
138 | } | |
139 | } | |
140 | ||
ba20bb12 PDS |
141 | static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) |
142 | { | |
143 | ||
5e7c58dc | 144 | int prev, state, trace_state = 0; |
ba20bb12 PDS |
145 | |
146 | if (pwrdm == NULL) | |
147 | return -EINVAL; | |
148 | ||
149 | state = pwrdm_read_pwrst(pwrdm); | |
150 | ||
151 | switch (flag) { | |
152 | case PWRDM_STATE_NOW: | |
153 | prev = pwrdm->state; | |
154 | break; | |
155 | case PWRDM_STATE_PREV: | |
156 | prev = pwrdm_read_prev_pwrst(pwrdm); | |
157 | if (pwrdm->state != prev) | |
158 | pwrdm->state_counter[prev]++; | |
cde08f81 TG |
159 | if (prev == PWRDM_POWER_RET) |
160 | _update_logic_membank_counters(pwrdm); | |
5e7c58dc JP |
161 | /* |
162 | * If the power domain did not hit the desired state, | |
163 | * generate a trace event with both the desired and hit states | |
164 | */ | |
165 | if (state != prev) { | |
166 | trace_state = (PWRDM_TRACE_STATES_FLAG | | |
167 | ((state & OMAP_POWERSTATE_MASK) << 8) | | |
168 | ((prev & OMAP_POWERSTATE_MASK) << 0)); | |
169 | trace_power_domain_target(pwrdm->name, trace_state, | |
170 | smp_processor_id()); | |
171 | } | |
ba20bb12 PDS |
172 | break; |
173 | default: | |
174 | return -EINVAL; | |
175 | } | |
176 | ||
177 | if (state != prev) | |
178 | pwrdm->state_counter[state]++; | |
179 | ||
6199ab26 PDS |
180 | pm_dbg_update_time(pwrdm, prev); |
181 | ||
ba20bb12 PDS |
182 | pwrdm->state = state; |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
6199ab26 | 187 | static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
188 | { |
189 | pwrdm_clear_all_prev_pwrst(pwrdm); | |
190 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
191 | return 0; | |
192 | } | |
193 | ||
6199ab26 | 194 | static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
195 | { |
196 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV); | |
197 | return 0; | |
198 | } | |
199 | ||
ad67ef68 PW |
200 | /* Public functions */ |
201 | ||
202 | /** | |
129c65ee PW |
203 | * pwrdm_register_platform_funcs - register powerdomain implementation fns |
204 | * @po: func pointers for arch specific implementations | |
ad67ef68 | 205 | * |
129c65ee PW |
206 | * Register the list of function pointers used to implement the |
207 | * powerdomain functions on different OMAP SoCs. Should be called | |
208 | * before any other pwrdm_register*() function. Returns -EINVAL if | |
209 | * @po is null, -EEXIST if platform functions have already been | |
210 | * registered, or 0 upon success. | |
ad67ef68 | 211 | */ |
129c65ee PW |
212 | int pwrdm_register_platform_funcs(struct pwrdm_ops *po) |
213 | { | |
214 | if (!po) | |
215 | return -EINVAL; | |
216 | ||
217 | if (arch_pwrdm) | |
218 | return -EEXIST; | |
219 | ||
220 | arch_pwrdm = po; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | /** | |
226 | * pwrdm_register_pwrdms - register SoC powerdomains | |
227 | * @ps: pointer to an array of struct powerdomain to register | |
228 | * | |
229 | * Register the powerdomains available on a particular OMAP SoC. Must | |
230 | * be called after pwrdm_register_platform_funcs(). May be called | |
231 | * multiple times. Returns -EACCES if called before | |
232 | * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is | |
233 | * null; or 0 upon success. | |
234 | */ | |
235 | int pwrdm_register_pwrdms(struct powerdomain **ps) | |
ad67ef68 PW |
236 | { |
237 | struct powerdomain **p = NULL; | |
238 | ||
129c65ee PW |
239 | if (!arch_pwrdm) |
240 | return -EEXIST; | |
3b1e8b21 | 241 | |
129c65ee PW |
242 | if (!ps) |
243 | return -EINVAL; | |
244 | ||
245 | for (p = ps; *p; p++) | |
246 | _pwrdm_register(*p); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | /** | |
252 | * pwrdm_complete_init - set up the powerdomain layer | |
253 | * | |
254 | * Do whatever is necessary to initialize registered powerdomains and | |
255 | * powerdomain code. Currently, this programs the next power state | |
256 | * for each powerdomain to ON. This prevents powerdomains from | |
257 | * unexpectedly losing context or entering high wakeup latency modes | |
258 | * with non-power-management-enabled kernels. Must be called after | |
259 | * pwrdm_register_pwrdms(). Returns -EACCES if called before | |
260 | * pwrdm_register_pwrdms(), or 0 upon success. | |
261 | */ | |
262 | int pwrdm_complete_init(void) | |
263 | { | |
264 | struct powerdomain *temp_p; | |
265 | ||
266 | if (list_empty(&pwrdm_list)) | |
267 | return -EACCES; | |
c956b753 RN |
268 | |
269 | list_for_each_entry(temp_p, &pwrdm_list, node) | |
270 | pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON); | |
129c65ee PW |
271 | |
272 | return 0; | |
ad67ef68 PW |
273 | } |
274 | ||
275 | /** | |
276 | * pwrdm_lookup - look up a powerdomain by name, return a pointer | |
277 | * @name: name of powerdomain | |
278 | * | |
f0271d65 PW |
279 | * Find a registered powerdomain by its name @name. Returns a pointer |
280 | * to the struct powerdomain if found, or NULL otherwise. | |
ad67ef68 PW |
281 | */ |
282 | struct powerdomain *pwrdm_lookup(const char *name) | |
283 | { | |
284 | struct powerdomain *pwrdm; | |
ad67ef68 PW |
285 | |
286 | if (!name) | |
287 | return NULL; | |
288 | ||
ad67ef68 | 289 | pwrdm = _pwrdm_lookup(name); |
ad67ef68 PW |
290 | |
291 | return pwrdm; | |
292 | } | |
293 | ||
294 | /** | |
e909d62a | 295 | * pwrdm_for_each - call function on each registered clockdomain |
ad67ef68 PW |
296 | * @fn: callback function * |
297 | * | |
f0271d65 PW |
298 | * Call the supplied function @fn for each registered powerdomain. |
299 | * The callback function @fn can return anything but 0 to bail out | |
300 | * early from the iterator. Returns the last return value of the | |
301 | * callback function, which should be 0 for success or anything else | |
302 | * to indicate failure; or -EINVAL if the function pointer is null. | |
ad67ef68 | 303 | */ |
e909d62a PW |
304 | int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), |
305 | void *user) | |
ad67ef68 PW |
306 | { |
307 | struct powerdomain *temp_pwrdm; | |
ad67ef68 PW |
308 | int ret = 0; |
309 | ||
310 | if (!fn) | |
311 | return -EINVAL; | |
312 | ||
ad67ef68 | 313 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
6199ab26 | 314 | ret = (*fn)(temp_pwrdm, user); |
ad67ef68 PW |
315 | if (ret) |
316 | break; | |
317 | } | |
ee894b18 AB |
318 | |
319 | return ret; | |
320 | } | |
321 | ||
8420bb13 PW |
322 | /** |
323 | * pwrdm_add_clkdm - add a clockdomain to a powerdomain | |
324 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
325 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
326 | * | |
f0271d65 | 327 | * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This |
8420bb13 PW |
328 | * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if |
329 | * presented with invalid pointers; -ENOMEM if memory could not be allocated; | |
330 | * or 0 upon success. | |
331 | */ | |
332 | int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
333 | { | |
8420bb13 PW |
334 | int i; |
335 | int ret = -EINVAL; | |
336 | ||
337 | if (!pwrdm || !clkdm) | |
338 | return -EINVAL; | |
339 | ||
340 | pr_debug("powerdomain: associating clockdomain %s with powerdomain " | |
341 | "%s\n", clkdm->name, pwrdm->name); | |
342 | ||
8420bb13 PW |
343 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { |
344 | if (!pwrdm->pwrdm_clkdms[i]) | |
345 | break; | |
346 | #ifdef DEBUG | |
347 | if (pwrdm->pwrdm_clkdms[i] == clkdm) { | |
348 | ret = -EINVAL; | |
349 | goto pac_exit; | |
350 | } | |
351 | #endif | |
352 | } | |
353 | ||
354 | if (i == PWRDM_MAX_CLKDMS) { | |
355 | pr_debug("powerdomain: increase PWRDM_MAX_CLKDMS for " | |
356 | "pwrdm %s clkdm %s\n", pwrdm->name, clkdm->name); | |
357 | WARN_ON(1); | |
358 | ret = -ENOMEM; | |
359 | goto pac_exit; | |
360 | } | |
361 | ||
362 | pwrdm->pwrdm_clkdms[i] = clkdm; | |
363 | ||
364 | ret = 0; | |
365 | ||
366 | pac_exit: | |
8420bb13 PW |
367 | return ret; |
368 | } | |
369 | ||
370 | /** | |
371 | * pwrdm_del_clkdm - remove a clockdomain from a powerdomain | |
372 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
373 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
374 | * | |
f0271d65 PW |
375 | * Dissociate the clockdomain @clkdm from the powerdomain |
376 | * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT | |
377 | * if @clkdm was not associated with the powerdomain, or 0 upon | |
378 | * success. | |
8420bb13 PW |
379 | */ |
380 | int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
381 | { | |
8420bb13 PW |
382 | int ret = -EINVAL; |
383 | int i; | |
384 | ||
385 | if (!pwrdm || !clkdm) | |
386 | return -EINVAL; | |
387 | ||
388 | pr_debug("powerdomain: dissociating clockdomain %s from powerdomain " | |
389 | "%s\n", clkdm->name, pwrdm->name); | |
390 | ||
8420bb13 PW |
391 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) |
392 | if (pwrdm->pwrdm_clkdms[i] == clkdm) | |
393 | break; | |
394 | ||
395 | if (i == PWRDM_MAX_CLKDMS) { | |
396 | pr_debug("powerdomain: clkdm %s not associated with pwrdm " | |
397 | "%s ?!\n", clkdm->name, pwrdm->name); | |
398 | ret = -ENOENT; | |
399 | goto pdc_exit; | |
400 | } | |
401 | ||
402 | pwrdm->pwrdm_clkdms[i] = NULL; | |
403 | ||
404 | ret = 0; | |
405 | ||
406 | pdc_exit: | |
8420bb13 PW |
407 | return ret; |
408 | } | |
409 | ||
410 | /** | |
411 | * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm | |
412 | * @pwrdm: struct powerdomain * to iterate over | |
413 | * @fn: callback function * | |
414 | * | |
f0271d65 PW |
415 | * Call the supplied function @fn for each clockdomain in the powerdomain |
416 | * @pwrdm. The callback function can return anything but 0 to bail | |
e909d62a PW |
417 | * out early from the iterator. Returns -EINVAL if presented with |
418 | * invalid pointers; or passes along the last return value of the | |
419 | * callback function, which should be 0 for success or anything else | |
420 | * to indicate failure. | |
8420bb13 PW |
421 | */ |
422 | int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, | |
423 | int (*fn)(struct powerdomain *pwrdm, | |
424 | struct clockdomain *clkdm)) | |
425 | { | |
8420bb13 PW |
426 | int ret = 0; |
427 | int i; | |
428 | ||
429 | if (!fn) | |
430 | return -EINVAL; | |
431 | ||
8420bb13 PW |
432 | for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++) |
433 | ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]); | |
434 | ||
8420bb13 PW |
435 | return ret; |
436 | } | |
437 | ||
048a7034 KH |
438 | /** |
439 | * pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in | |
440 | * @pwrdm: struct powerdomain * | |
441 | * | |
442 | * Return a pointer to the struct voltageomain that the specified powerdomain | |
443 | * @pwrdm exists in. | |
444 | */ | |
445 | struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm) | |
446 | { | |
447 | return pwrdm->voltdm.ptr; | |
448 | } | |
449 | ||
ad67ef68 PW |
450 | /** |
451 | * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain | |
452 | * @pwrdm: struct powerdomain * | |
453 | * | |
f0271d65 | 454 | * Return the number of controllable memory banks in powerdomain @pwrdm, |
ad67ef68 PW |
455 | * starting with 1. Returns -EINVAL if the powerdomain pointer is null. |
456 | */ | |
457 | int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm) | |
458 | { | |
459 | if (!pwrdm) | |
460 | return -EINVAL; | |
461 | ||
462 | return pwrdm->banks; | |
463 | } | |
464 | ||
465 | /** | |
466 | * pwrdm_set_next_pwrst - set next powerdomain power state | |
467 | * @pwrdm: struct powerdomain * to set | |
468 | * @pwrst: one of the PWRDM_POWER_* macros | |
469 | * | |
f0271d65 | 470 | * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain |
ad67ef68 PW |
471 | * may not enter this state immediately if the preconditions for this state |
472 | * have not been satisfied. Returns -EINVAL if the powerdomain pointer is | |
473 | * null or if the power state is invalid for the powerdomin, or returns 0 | |
474 | * upon success. | |
475 | */ | |
476 | int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) | |
477 | { | |
f327e07b RN |
478 | int ret = -EINVAL; |
479 | ||
ad67ef68 PW |
480 | if (!pwrdm) |
481 | return -EINVAL; | |
482 | ||
483 | if (!(pwrdm->pwrsts & (1 << pwrst))) | |
484 | return -EINVAL; | |
485 | ||
486 | pr_debug("powerdomain: setting next powerstate for %s to %0x\n", | |
487 | pwrdm->name, pwrst); | |
488 | ||
5e7c58dc JP |
489 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { |
490 | /* Trace the pwrdm desired target state */ | |
491 | trace_power_domain_target(pwrdm->name, pwrst, | |
492 | smp_processor_id()); | |
493 | /* Program the pwrdm desired target state */ | |
f327e07b | 494 | ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); |
5e7c58dc | 495 | } |
ad67ef68 | 496 | |
f327e07b | 497 | return ret; |
ad67ef68 PW |
498 | } |
499 | ||
500 | /** | |
501 | * pwrdm_read_next_pwrst - get next powerdomain power state | |
502 | * @pwrdm: struct powerdomain * to get power state | |
503 | * | |
f0271d65 | 504 | * Return the powerdomain @pwrdm's next power state. Returns -EINVAL |
ad67ef68 PW |
505 | * if the powerdomain pointer is null or returns the next power state |
506 | * upon success. | |
507 | */ | |
508 | int pwrdm_read_next_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_next_pwrst) |
516 | ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm); | |
517 | ||
518 | return ret; | |
ad67ef68 PW |
519 | } |
520 | ||
521 | /** | |
522 | * pwrdm_read_pwrst - get current powerdomain power state | |
523 | * @pwrdm: struct powerdomain * to get power state | |
524 | * | |
f0271d65 | 525 | * Return the powerdomain @pwrdm's current power state. Returns -EINVAL |
ad67ef68 PW |
526 | * if the powerdomain pointer is null or returns the current power state |
527 | * upon success. | |
528 | */ | |
529 | int pwrdm_read_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_pwrst) |
537 | ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm); | |
538 | ||
539 | return ret; | |
ad67ef68 PW |
540 | } |
541 | ||
542 | /** | |
543 | * pwrdm_read_prev_pwrst - get previous powerdomain power state | |
544 | * @pwrdm: struct powerdomain * to get previous power state | |
545 | * | |
f0271d65 | 546 | * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL |
ad67ef68 PW |
547 | * if the powerdomain pointer is null or returns the previous power state |
548 | * upon success. | |
549 | */ | |
550 | int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) | |
551 | { | |
f327e07b RN |
552 | int ret = -EINVAL; |
553 | ||
ad67ef68 PW |
554 | if (!pwrdm) |
555 | return -EINVAL; | |
556 | ||
f327e07b RN |
557 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst) |
558 | ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm); | |
559 | ||
560 | return ret; | |
ad67ef68 PW |
561 | } |
562 | ||
563 | /** | |
564 | * pwrdm_set_logic_retst - set powerdomain logic power state upon retention | |
565 | * @pwrdm: struct powerdomain * to set | |
566 | * @pwrst: one of the PWRDM_POWER_* macros | |
567 | * | |
f0271d65 PW |
568 | * Set the next power state @pwrst that the logic portion of the |
569 | * powerdomain @pwrdm will enter when the powerdomain enters retention. | |
570 | * This will be either RETENTION or OFF, if supported. Returns | |
571 | * -EINVAL if the powerdomain pointer is null or the target power | |
572 | * state is not not supported, or returns 0 upon success. | |
ad67ef68 PW |
573 | */ |
574 | int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) | |
575 | { | |
12627578 | 576 | int ret = -EINVAL; |
2bc4ef71 | 577 | |
ad67ef68 PW |
578 | if (!pwrdm) |
579 | return -EINVAL; | |
580 | ||
581 | if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) | |
582 | return -EINVAL; | |
583 | ||
584 | pr_debug("powerdomain: setting next logic powerstate for %s to %0x\n", | |
585 | pwrdm->name, pwrst); | |
586 | ||
12627578 RN |
587 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst) |
588 | ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst); | |
ad67ef68 | 589 | |
12627578 | 590 | return ret; |
ad67ef68 PW |
591 | } |
592 | ||
593 | /** | |
594 | * pwrdm_set_mem_onst - set memory power state while powerdomain ON | |
595 | * @pwrdm: struct powerdomain * to set | |
596 | * @bank: memory bank number to set (0-3) | |
597 | * @pwrst: one of the PWRDM_POWER_* macros | |
598 | * | |
f0271d65 PW |
599 | * Set the next power state @pwrst that memory bank @bank of the |
600 | * powerdomain @pwrdm will enter when the powerdomain enters the ON | |
601 | * state. @bank will be a number from 0 to 3, and represents different | |
602 | * types of memory, depending on the powerdomain. Returns -EINVAL if | |
603 | * the powerdomain pointer is null or the target power state is not | |
604 | * not supported for this memory bank, -EEXIST if the target memory | |
605 | * bank does not exist or is not controllable, or returns 0 upon | |
606 | * success. | |
ad67ef68 PW |
607 | */ |
608 | int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
609 | { | |
9b7fc907 | 610 | int ret = -EINVAL; |
ad67ef68 PW |
611 | |
612 | if (!pwrdm) | |
613 | return -EINVAL; | |
614 | ||
615 | if (pwrdm->banks < (bank + 1)) | |
616 | return -EEXIST; | |
617 | ||
618 | if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) | |
619 | return -EINVAL; | |
620 | ||
621 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
622 | "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst); | |
623 | ||
9b7fc907 RN |
624 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) |
625 | ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); | |
ad67ef68 | 626 | |
9b7fc907 | 627 | return ret; |
ad67ef68 PW |
628 | } |
629 | ||
630 | /** | |
631 | * pwrdm_set_mem_retst - set memory power state while powerdomain in RET | |
632 | * @pwrdm: struct powerdomain * to set | |
633 | * @bank: memory bank number to set (0-3) | |
634 | * @pwrst: one of the PWRDM_POWER_* macros | |
635 | * | |
f0271d65 PW |
636 | * Set the next power state @pwrst that memory bank @bank of the |
637 | * powerdomain @pwrdm will enter when the powerdomain enters the | |
638 | * RETENTION state. Bank will be a number from 0 to 3, and represents | |
639 | * different types of memory, depending on the powerdomain. @pwrst | |
640 | * will be either RETENTION or OFF, if supported. Returns -EINVAL if | |
641 | * the powerdomain pointer is null or the target power state is not | |
642 | * not supported for this memory bank, -EEXIST if the target memory | |
643 | * bank does not exist or is not controllable, or returns 0 upon | |
644 | * success. | |
ad67ef68 PW |
645 | */ |
646 | int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
647 | { | |
9b7fc907 | 648 | int ret = -EINVAL; |
ad67ef68 PW |
649 | |
650 | if (!pwrdm) | |
651 | return -EINVAL; | |
652 | ||
653 | if (pwrdm->banks < (bank + 1)) | |
654 | return -EEXIST; | |
655 | ||
656 | if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) | |
657 | return -EINVAL; | |
658 | ||
659 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
660 | "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst); | |
661 | ||
9b7fc907 RN |
662 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) |
663 | ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); | |
ad67ef68 | 664 | |
9b7fc907 | 665 | return ret; |
ad67ef68 PW |
666 | } |
667 | ||
668 | /** | |
669 | * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state | |
670 | * @pwrdm: struct powerdomain * to get current logic retention power state | |
671 | * | |
f0271d65 PW |
672 | * Return the power state that the logic portion of powerdomain @pwrdm |
673 | * will enter when the powerdomain enters retention. Returns -EINVAL | |
674 | * if the powerdomain pointer is null or returns the logic retention | |
675 | * power state upon success. | |
ad67ef68 PW |
676 | */ |
677 | int pwrdm_read_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_logic_pwrst) |
685 | ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm); | |
686 | ||
687 | return ret; | |
ad67ef68 PW |
688 | } |
689 | ||
690 | /** | |
691 | * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state | |
692 | * @pwrdm: struct powerdomain * to get previous logic power state | |
693 | * | |
f0271d65 PW |
694 | * Return the powerdomain @pwrdm's previous logic power state. Returns |
695 | * -EINVAL if the powerdomain pointer is null or returns the previous | |
696 | * logic power state upon success. | |
ad67ef68 PW |
697 | */ |
698 | int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) | |
699 | { | |
12627578 RN |
700 | int ret = -EINVAL; |
701 | ||
ad67ef68 PW |
702 | if (!pwrdm) |
703 | return -EINVAL; | |
704 | ||
12627578 RN |
705 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst) |
706 | ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm); | |
707 | ||
708 | return ret; | |
ad67ef68 PW |
709 | } |
710 | ||
1e3d0d2b TG |
711 | /** |
712 | * pwrdm_read_logic_retst - get next powerdomain logic power state | |
713 | * @pwrdm: struct powerdomain * to get next logic power state | |
714 | * | |
715 | * Return the powerdomain pwrdm's logic power state. Returns -EINVAL | |
716 | * if the powerdomain pointer is null or returns the next logic | |
717 | * power state upon success. | |
718 | */ | |
719 | int pwrdm_read_logic_retst(struct powerdomain *pwrdm) | |
720 | { | |
12627578 RN |
721 | int ret = -EINVAL; |
722 | ||
1e3d0d2b TG |
723 | if (!pwrdm) |
724 | return -EINVAL; | |
725 | ||
12627578 RN |
726 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst) |
727 | ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm); | |
728 | ||
729 | return ret; | |
1e3d0d2b TG |
730 | } |
731 | ||
ad67ef68 PW |
732 | /** |
733 | * pwrdm_read_mem_pwrst - get current memory bank power state | |
734 | * @pwrdm: struct powerdomain * to get current memory bank power state | |
735 | * @bank: memory bank number (0-3) | |
736 | * | |
f0271d65 PW |
737 | * Return the powerdomain @pwrdm's current memory power state for bank |
738 | * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
ad67ef68 PW |
739 | * the target memory bank does not exist or is not controllable, or |
740 | * returns the current memory power state upon success. | |
741 | */ | |
742 | int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
743 | { | |
9b7fc907 | 744 | int ret = -EINVAL; |
ad67ef68 PW |
745 | |
746 | if (!pwrdm) | |
9b7fc907 | 747 | return ret; |
ad67ef68 PW |
748 | |
749 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 750 | return ret; |
ad67ef68 | 751 | |
3863c74b TG |
752 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
753 | bank = 1; | |
754 | ||
9b7fc907 RN |
755 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) |
756 | ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 757 | |
9b7fc907 | 758 | return ret; |
ad67ef68 PW |
759 | } |
760 | ||
761 | /** | |
762 | * pwrdm_read_prev_mem_pwrst - get previous memory bank power state | |
763 | * @pwrdm: struct powerdomain * to get previous memory bank power state | |
764 | * @bank: memory bank number (0-3) | |
765 | * | |
f0271d65 PW |
766 | * Return the powerdomain @pwrdm's previous memory power state for |
767 | * bank @bank. Returns -EINVAL if the powerdomain pointer is null, | |
768 | * -EEXIST if the target memory bank does not exist or is not | |
769 | * controllable, or returns the previous memory power state upon | |
770 | * success. | |
ad67ef68 PW |
771 | */ |
772 | int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
773 | { | |
9b7fc907 | 774 | int ret = -EINVAL; |
ad67ef68 PW |
775 | |
776 | if (!pwrdm) | |
9b7fc907 | 777 | return ret; |
ad67ef68 PW |
778 | |
779 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 780 | return ret; |
ad67ef68 | 781 | |
3863c74b TG |
782 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
783 | bank = 1; | |
784 | ||
9b7fc907 RN |
785 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) |
786 | ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 787 | |
9b7fc907 | 788 | return ret; |
ad67ef68 PW |
789 | } |
790 | ||
1e3d0d2b TG |
791 | /** |
792 | * pwrdm_read_mem_retst - get next memory bank power state | |
793 | * @pwrdm: struct powerdomain * to get mext memory bank power state | |
794 | * @bank: memory bank number (0-3) | |
795 | * | |
796 | * Return the powerdomain pwrdm's next memory power state for bank | |
797 | * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
798 | * the target memory bank does not exist or is not controllable, or | |
799 | * returns the next memory power state upon success. | |
800 | */ | |
801 | int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) | |
802 | { | |
9b7fc907 | 803 | int ret = -EINVAL; |
1e3d0d2b TG |
804 | |
805 | if (!pwrdm) | |
9b7fc907 | 806 | return ret; |
1e3d0d2b TG |
807 | |
808 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 809 | return ret; |
1e3d0d2b | 810 | |
9b7fc907 RN |
811 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) |
812 | ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); | |
1e3d0d2b | 813 | |
9b7fc907 | 814 | return ret; |
1e3d0d2b TG |
815 | } |
816 | ||
ad67ef68 PW |
817 | /** |
818 | * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm | |
819 | * @pwrdm: struct powerdomain * to clear | |
820 | * | |
f0271d65 PW |
821 | * Clear the powerdomain's previous power state register @pwrdm. |
822 | * Clears the entire register, including logic and memory bank | |
823 | * previous power states. Returns -EINVAL if the powerdomain pointer | |
824 | * is null, or returns 0 upon success. | |
ad67ef68 PW |
825 | */ |
826 | int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) | |
827 | { | |
9b7fc907 RN |
828 | int ret = -EINVAL; |
829 | ||
ad67ef68 | 830 | if (!pwrdm) |
9b7fc907 | 831 | return ret; |
ad67ef68 PW |
832 | |
833 | /* | |
834 | * XXX should get the powerdomain's current state here; | |
835 | * warn & fail if it is not ON. | |
836 | */ | |
837 | ||
838 | pr_debug("powerdomain: clearing previous power state reg for %s\n", | |
839 | pwrdm->name); | |
840 | ||
9b7fc907 RN |
841 | if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) |
842 | ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); | |
ad67ef68 | 843 | |
9b7fc907 | 844 | return ret; |
ad67ef68 PW |
845 | } |
846 | ||
0b7cbfb5 PW |
847 | /** |
848 | * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm | |
849 | * @pwrdm: struct powerdomain * | |
850 | * | |
851 | * Enable automatic context save-and-restore upon power state change | |
f0271d65 PW |
852 | * for some devices in the powerdomain @pwrdm. Warning: this only |
853 | * affects a subset of devices in a powerdomain; check the TRM | |
854 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
855 | * the powerdomain does not support automatic save-and-restore, or | |
856 | * returns 0 upon success. | |
0b7cbfb5 PW |
857 | */ |
858 | int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) | |
859 | { | |
9b7fc907 RN |
860 | int ret = -EINVAL; |
861 | ||
0b7cbfb5 | 862 | if (!pwrdm) |
9b7fc907 | 863 | return ret; |
0b7cbfb5 PW |
864 | |
865 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 866 | return ret; |
0b7cbfb5 PW |
867 | |
868 | pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", | |
869 | pwrdm->name); | |
870 | ||
9b7fc907 RN |
871 | if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) |
872 | ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 873 | |
9b7fc907 | 874 | return ret; |
0b7cbfb5 PW |
875 | } |
876 | ||
877 | /** | |
878 | * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm | |
879 | * @pwrdm: struct powerdomain * | |
880 | * | |
881 | * Disable automatic context save-and-restore upon power state change | |
f0271d65 PW |
882 | * for some devices in the powerdomain @pwrdm. Warning: this only |
883 | * affects a subset of devices in a powerdomain; check the TRM | |
884 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
885 | * the powerdomain does not support automatic save-and-restore, or | |
886 | * returns 0 upon success. | |
0b7cbfb5 PW |
887 | */ |
888 | int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) | |
889 | { | |
9b7fc907 RN |
890 | int ret = -EINVAL; |
891 | ||
0b7cbfb5 | 892 | if (!pwrdm) |
9b7fc907 | 893 | return ret; |
0b7cbfb5 PW |
894 | |
895 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 896 | return ret; |
0b7cbfb5 PW |
897 | |
898 | pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", | |
899 | pwrdm->name); | |
900 | ||
9b7fc907 RN |
901 | if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) |
902 | ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 903 | |
9b7fc907 | 904 | return ret; |
0b7cbfb5 PW |
905 | } |
906 | ||
907 | /** | |
908 | * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR | |
909 | * @pwrdm: struct powerdomain * | |
910 | * | |
f0271d65 | 911 | * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore |
0b7cbfb5 PW |
912 | * for some devices, or 0 if it does not. |
913 | */ | |
914 | bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) | |
915 | { | |
916 | return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0; | |
917 | } | |
918 | ||
90dbc7b0 RN |
919 | /** |
920 | * pwrdm_set_lowpwrstchange - Request a low power state change | |
921 | * @pwrdm: struct powerdomain * | |
922 | * | |
923 | * Allows a powerdomain to transtion to a lower power sleep state | |
924 | * from an existing sleep state without waking up the powerdomain. | |
925 | * Returns -EINVAL if the powerdomain pointer is null or if the | |
926 | * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0 | |
927 | * upon success. | |
928 | */ | |
929 | int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) | |
930 | { | |
9b7fc907 RN |
931 | int ret = -EINVAL; |
932 | ||
90dbc7b0 RN |
933 | if (!pwrdm) |
934 | return -EINVAL; | |
935 | ||
936 | if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) | |
937 | return -EINVAL; | |
938 | ||
939 | pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n", | |
940 | pwrdm->name); | |
941 | ||
9b7fc907 RN |
942 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange) |
943 | ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); | |
90dbc7b0 | 944 | |
9b7fc907 | 945 | return ret; |
90dbc7b0 RN |
946 | } |
947 | ||
ad67ef68 PW |
948 | /** |
949 | * pwrdm_wait_transition - wait for powerdomain power transition to finish | |
950 | * @pwrdm: struct powerdomain * to wait for | |
951 | * | |
f0271d65 | 952 | * If the powerdomain @pwrdm is in the process of a state transition, |
ad67ef68 PW |
953 | * spin until it completes the power transition, or until an iteration |
954 | * bailout value is reached. Returns -EINVAL if the powerdomain | |
955 | * pointer is null, -EAGAIN if the bailout value was reached, or | |
956 | * returns 0 upon success. | |
957 | */ | |
958 | int pwrdm_wait_transition(struct powerdomain *pwrdm) | |
959 | { | |
9b7fc907 | 960 | int ret = -EINVAL; |
ad67ef68 PW |
961 | |
962 | if (!pwrdm) | |
963 | return -EINVAL; | |
964 | ||
9b7fc907 RN |
965 | if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition) |
966 | ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); | |
ad67ef68 | 967 | |
9b7fc907 | 968 | return ret; |
ad67ef68 PW |
969 | } |
970 | ||
ba20bb12 PDS |
971 | int pwrdm_state_switch(struct powerdomain *pwrdm) |
972 | { | |
973 | return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
974 | } | |
975 | ||
976 | int pwrdm_clkdm_state_switch(struct clockdomain *clkdm) | |
977 | { | |
978 | if (clkdm != NULL && clkdm->pwrdm.ptr != NULL) { | |
979 | pwrdm_wait_transition(clkdm->pwrdm.ptr); | |
980 | return pwrdm_state_switch(clkdm->pwrdm.ptr); | |
981 | } | |
982 | ||
983 | return -EINVAL; | |
984 | } | |
ba20bb12 PDS |
985 | |
986 | int pwrdm_pre_transition(void) | |
987 | { | |
6199ab26 | 988 | pwrdm_for_each(_pwrdm_pre_transition_cb, NULL); |
ba20bb12 PDS |
989 | return 0; |
990 | } | |
991 | ||
992 | int pwrdm_post_transition(void) | |
993 | { | |
6199ab26 | 994 | pwrdm_for_each(_pwrdm_post_transition_cb, NULL); |
ba20bb12 PDS |
995 | return 0; |
996 | } | |
7f595674 KH |
997 | |
998 | /** | |
999 | * pwrdm_get_context_loss_count - get powerdomain's context loss count | |
1000 | * @pwrdm: struct powerdomain * to wait for | |
1001 | * | |
1002 | * Context loss count is the sum of powerdomain off-mode counter, the | |
1003 | * logic off counter and the per-bank memory off counter. Returns 0 | |
1004 | * (and WARNs) upon error, otherwise, returns the context loss count. | |
1005 | */ | |
1006 | u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm) | |
1007 | { | |
1008 | int i, count; | |
1009 | ||
1010 | if (!pwrdm) { | |
1011 | WARN(1, "powerdomain: %s: pwrdm is null\n", __func__); | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | count = pwrdm->state_counter[PWRDM_POWER_OFF]; | |
1016 | count += pwrdm->ret_logic_off_counter; | |
1017 | ||
1018 | for (i = 0; i < pwrdm->banks; i++) | |
1019 | count += pwrdm->ret_mem_off_counter[i]; | |
1020 | ||
1021 | pr_debug("powerdomain: %s: context loss count = %u\n", | |
1022 | pwrdm->name, count); | |
1023 | ||
1024 | return count; | |
1025 | } | |
694606c4 PW |
1026 | |
1027 | /** | |
1028 | * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? | |
1029 | * @pwrdm: struct powerdomain * | |
1030 | * | |
1031 | * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain | |
1032 | * can lose either memory or logic context or if @pwrdm is invalid, or | |
1033 | * returns 0 otherwise. This function is not concerned with how the | |
1034 | * powerdomain registers are programmed (i.e., to go off or not); it's | |
1035 | * concerned with whether it's ever possible for this powerdomain to | |
1036 | * go off while some other part of the chip is active. This function | |
1037 | * assumes that every powerdomain can go to either ON or INACTIVE. | |
1038 | */ | |
1039 | bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) | |
1040 | { | |
1041 | int i; | |
1042 | ||
1043 | if (IS_ERR_OR_NULL(pwrdm)) { | |
1044 | pr_debug("powerdomain: %s: invalid powerdomain pointer\n", | |
1045 | __func__); | |
1046 | return 1; | |
1047 | } | |
1048 | ||
1049 | if (pwrdm->pwrsts & PWRSTS_OFF) | |
1050 | return 1; | |
1051 | ||
1052 | if (pwrdm->pwrsts & PWRSTS_RET) { | |
1053 | if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) | |
1054 | return 1; | |
1055 | ||
1056 | for (i = 0; i < pwrdm->banks; i++) | |
1057 | if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) | |
1058 | return 1; | |
1059 | } | |
1060 | ||
1061 | for (i = 0; i < pwrdm->banks; i++) | |
1062 | if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) | |
1063 | return 1; | |
1064 | ||
1065 | return 0; | |
1066 | } |