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; | |
e69c22b1 KH |
102 | INIT_LIST_HEAD(&pwrdm->voltdm_node); |
103 | voltdm_add_pwrdm(voltdm, pwrdm); | |
048a7034 | 104 | |
e909d62a PW |
105 | list_add(&pwrdm->node, &pwrdm_list); |
106 | ||
107 | /* Initialize the powerdomain's state counter */ | |
cf57aa7c | 108 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
e909d62a PW |
109 | pwrdm->state_counter[i] = 0; |
110 | ||
cde08f81 TG |
111 | pwrdm->ret_logic_off_counter = 0; |
112 | for (i = 0; i < pwrdm->banks; i++) | |
113 | pwrdm->ret_mem_off_counter[i] = 0; | |
114 | ||
e909d62a PW |
115 | pwrdm_wait_transition(pwrdm); |
116 | pwrdm->state = pwrdm_read_pwrst(pwrdm); | |
117 | pwrdm->state_counter[pwrdm->state] = 1; | |
118 | ||
119 | pr_debug("powerdomain: registered %s\n", pwrdm->name); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
cde08f81 TG |
124 | static void _update_logic_membank_counters(struct powerdomain *pwrdm) |
125 | { | |
126 | int i; | |
127 | u8 prev_logic_pwrst, prev_mem_pwrst; | |
128 | ||
129 | prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm); | |
130 | if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) && | |
131 | (prev_logic_pwrst == PWRDM_POWER_OFF)) | |
132 | pwrdm->ret_logic_off_counter++; | |
133 | ||
134 | for (i = 0; i < pwrdm->banks; i++) { | |
135 | prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i); | |
136 | ||
137 | if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) && | |
138 | (prev_mem_pwrst == PWRDM_POWER_OFF)) | |
139 | pwrdm->ret_mem_off_counter[i]++; | |
140 | } | |
141 | } | |
142 | ||
ba20bb12 PDS |
143 | static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag) |
144 | { | |
145 | ||
5e7c58dc | 146 | int prev, state, trace_state = 0; |
ba20bb12 PDS |
147 | |
148 | if (pwrdm == NULL) | |
149 | return -EINVAL; | |
150 | ||
151 | state = pwrdm_read_pwrst(pwrdm); | |
152 | ||
153 | switch (flag) { | |
154 | case PWRDM_STATE_NOW: | |
155 | prev = pwrdm->state; | |
156 | break; | |
157 | case PWRDM_STATE_PREV: | |
158 | prev = pwrdm_read_prev_pwrst(pwrdm); | |
159 | if (pwrdm->state != prev) | |
160 | pwrdm->state_counter[prev]++; | |
cde08f81 TG |
161 | if (prev == PWRDM_POWER_RET) |
162 | _update_logic_membank_counters(pwrdm); | |
5e7c58dc JP |
163 | /* |
164 | * If the power domain did not hit the desired state, | |
165 | * generate a trace event with both the desired and hit states | |
166 | */ | |
167 | if (state != prev) { | |
168 | trace_state = (PWRDM_TRACE_STATES_FLAG | | |
169 | ((state & OMAP_POWERSTATE_MASK) << 8) | | |
170 | ((prev & OMAP_POWERSTATE_MASK) << 0)); | |
171 | trace_power_domain_target(pwrdm->name, trace_state, | |
172 | smp_processor_id()); | |
173 | } | |
ba20bb12 PDS |
174 | break; |
175 | default: | |
176 | return -EINVAL; | |
177 | } | |
178 | ||
179 | if (state != prev) | |
180 | pwrdm->state_counter[state]++; | |
181 | ||
6199ab26 PDS |
182 | pm_dbg_update_time(pwrdm, prev); |
183 | ||
ba20bb12 PDS |
184 | pwrdm->state = state; |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
6199ab26 | 189 | static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
190 | { |
191 | pwrdm_clear_all_prev_pwrst(pwrdm); | |
192 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
193 | return 0; | |
194 | } | |
195 | ||
6199ab26 | 196 | static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) |
ba20bb12 PDS |
197 | { |
198 | _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV); | |
199 | return 0; | |
200 | } | |
201 | ||
ad67ef68 PW |
202 | /* Public functions */ |
203 | ||
204 | /** | |
129c65ee PW |
205 | * pwrdm_register_platform_funcs - register powerdomain implementation fns |
206 | * @po: func pointers for arch specific implementations | |
ad67ef68 | 207 | * |
129c65ee PW |
208 | * Register the list of function pointers used to implement the |
209 | * powerdomain functions on different OMAP SoCs. Should be called | |
210 | * before any other pwrdm_register*() function. Returns -EINVAL if | |
211 | * @po is null, -EEXIST if platform functions have already been | |
212 | * registered, or 0 upon success. | |
ad67ef68 | 213 | */ |
129c65ee PW |
214 | int pwrdm_register_platform_funcs(struct pwrdm_ops *po) |
215 | { | |
216 | if (!po) | |
217 | return -EINVAL; | |
218 | ||
219 | if (arch_pwrdm) | |
220 | return -EEXIST; | |
221 | ||
222 | arch_pwrdm = po; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | /** | |
228 | * pwrdm_register_pwrdms - register SoC powerdomains | |
229 | * @ps: pointer to an array of struct powerdomain to register | |
230 | * | |
231 | * Register the powerdomains available on a particular OMAP SoC. Must | |
232 | * be called after pwrdm_register_platform_funcs(). May be called | |
233 | * multiple times. Returns -EACCES if called before | |
234 | * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is | |
235 | * null; or 0 upon success. | |
236 | */ | |
237 | int pwrdm_register_pwrdms(struct powerdomain **ps) | |
ad67ef68 PW |
238 | { |
239 | struct powerdomain **p = NULL; | |
240 | ||
129c65ee PW |
241 | if (!arch_pwrdm) |
242 | return -EEXIST; | |
3b1e8b21 | 243 | |
129c65ee PW |
244 | if (!ps) |
245 | return -EINVAL; | |
246 | ||
247 | for (p = ps; *p; p++) | |
248 | _pwrdm_register(*p); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | /** | |
254 | * pwrdm_complete_init - set up the powerdomain layer | |
255 | * | |
256 | * Do whatever is necessary to initialize registered powerdomains and | |
257 | * powerdomain code. Currently, this programs the next power state | |
258 | * for each powerdomain to ON. This prevents powerdomains from | |
259 | * unexpectedly losing context or entering high wakeup latency modes | |
260 | * with non-power-management-enabled kernels. Must be called after | |
261 | * pwrdm_register_pwrdms(). Returns -EACCES if called before | |
262 | * pwrdm_register_pwrdms(), or 0 upon success. | |
263 | */ | |
264 | int pwrdm_complete_init(void) | |
265 | { | |
266 | struct powerdomain *temp_p; | |
267 | ||
268 | if (list_empty(&pwrdm_list)) | |
269 | return -EACCES; | |
c956b753 RN |
270 | |
271 | list_for_each_entry(temp_p, &pwrdm_list, node) | |
272 | pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON); | |
129c65ee PW |
273 | |
274 | return 0; | |
ad67ef68 PW |
275 | } |
276 | ||
277 | /** | |
278 | * pwrdm_lookup - look up a powerdomain by name, return a pointer | |
279 | * @name: name of powerdomain | |
280 | * | |
f0271d65 PW |
281 | * Find a registered powerdomain by its name @name. Returns a pointer |
282 | * to the struct powerdomain if found, or NULL otherwise. | |
ad67ef68 PW |
283 | */ |
284 | struct powerdomain *pwrdm_lookup(const char *name) | |
285 | { | |
286 | struct powerdomain *pwrdm; | |
ad67ef68 PW |
287 | |
288 | if (!name) | |
289 | return NULL; | |
290 | ||
ad67ef68 | 291 | pwrdm = _pwrdm_lookup(name); |
ad67ef68 PW |
292 | |
293 | return pwrdm; | |
294 | } | |
295 | ||
296 | /** | |
e909d62a | 297 | * pwrdm_for_each - call function on each registered clockdomain |
ad67ef68 PW |
298 | * @fn: callback function * |
299 | * | |
f0271d65 PW |
300 | * Call the supplied function @fn for each registered powerdomain. |
301 | * The callback function @fn can return anything but 0 to bail out | |
302 | * early from the iterator. Returns the last return value of the | |
303 | * callback function, which should be 0 for success or anything else | |
304 | * to indicate failure; or -EINVAL if the function pointer is null. | |
ad67ef68 | 305 | */ |
e909d62a PW |
306 | int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), |
307 | void *user) | |
ad67ef68 PW |
308 | { |
309 | struct powerdomain *temp_pwrdm; | |
ad67ef68 PW |
310 | int ret = 0; |
311 | ||
312 | if (!fn) | |
313 | return -EINVAL; | |
314 | ||
ad67ef68 | 315 | list_for_each_entry(temp_pwrdm, &pwrdm_list, node) { |
6199ab26 | 316 | ret = (*fn)(temp_pwrdm, user); |
ad67ef68 PW |
317 | if (ret) |
318 | break; | |
319 | } | |
ee894b18 AB |
320 | |
321 | return ret; | |
322 | } | |
323 | ||
8420bb13 PW |
324 | /** |
325 | * pwrdm_add_clkdm - add a clockdomain to a powerdomain | |
326 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
327 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
328 | * | |
f0271d65 | 329 | * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This |
8420bb13 PW |
330 | * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if |
331 | * presented with invalid pointers; -ENOMEM if memory could not be allocated; | |
332 | * or 0 upon success. | |
333 | */ | |
334 | int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
335 | { | |
8420bb13 PW |
336 | int i; |
337 | int ret = -EINVAL; | |
338 | ||
339 | if (!pwrdm || !clkdm) | |
340 | return -EINVAL; | |
341 | ||
342 | pr_debug("powerdomain: associating clockdomain %s with powerdomain " | |
343 | "%s\n", clkdm->name, pwrdm->name); | |
344 | ||
8420bb13 PW |
345 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { |
346 | if (!pwrdm->pwrdm_clkdms[i]) | |
347 | break; | |
348 | #ifdef DEBUG | |
349 | if (pwrdm->pwrdm_clkdms[i] == clkdm) { | |
350 | ret = -EINVAL; | |
351 | goto pac_exit; | |
352 | } | |
353 | #endif | |
354 | } | |
355 | ||
356 | if (i == PWRDM_MAX_CLKDMS) { | |
357 | pr_debug("powerdomain: increase PWRDM_MAX_CLKDMS for " | |
358 | "pwrdm %s clkdm %s\n", pwrdm->name, clkdm->name); | |
359 | WARN_ON(1); | |
360 | ret = -ENOMEM; | |
361 | goto pac_exit; | |
362 | } | |
363 | ||
364 | pwrdm->pwrdm_clkdms[i] = clkdm; | |
365 | ||
366 | ret = 0; | |
367 | ||
368 | pac_exit: | |
8420bb13 PW |
369 | return ret; |
370 | } | |
371 | ||
372 | /** | |
373 | * pwrdm_del_clkdm - remove a clockdomain from a powerdomain | |
374 | * @pwrdm: struct powerdomain * to add the clockdomain to | |
375 | * @clkdm: struct clockdomain * to associate with a powerdomain | |
376 | * | |
f0271d65 PW |
377 | * Dissociate the clockdomain @clkdm from the powerdomain |
378 | * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT | |
379 | * if @clkdm was not associated with the powerdomain, or 0 upon | |
380 | * success. | |
8420bb13 PW |
381 | */ |
382 | int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) | |
383 | { | |
8420bb13 PW |
384 | int ret = -EINVAL; |
385 | int i; | |
386 | ||
387 | if (!pwrdm || !clkdm) | |
388 | return -EINVAL; | |
389 | ||
390 | pr_debug("powerdomain: dissociating clockdomain %s from powerdomain " | |
391 | "%s\n", clkdm->name, pwrdm->name); | |
392 | ||
8420bb13 PW |
393 | for (i = 0; i < PWRDM_MAX_CLKDMS; i++) |
394 | if (pwrdm->pwrdm_clkdms[i] == clkdm) | |
395 | break; | |
396 | ||
397 | if (i == PWRDM_MAX_CLKDMS) { | |
398 | pr_debug("powerdomain: clkdm %s not associated with pwrdm " | |
399 | "%s ?!\n", clkdm->name, pwrdm->name); | |
400 | ret = -ENOENT; | |
401 | goto pdc_exit; | |
402 | } | |
403 | ||
404 | pwrdm->pwrdm_clkdms[i] = NULL; | |
405 | ||
406 | ret = 0; | |
407 | ||
408 | pdc_exit: | |
8420bb13 PW |
409 | return ret; |
410 | } | |
411 | ||
412 | /** | |
413 | * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm | |
414 | * @pwrdm: struct powerdomain * to iterate over | |
415 | * @fn: callback function * | |
416 | * | |
f0271d65 PW |
417 | * Call the supplied function @fn for each clockdomain in the powerdomain |
418 | * @pwrdm. The callback function can return anything but 0 to bail | |
e909d62a PW |
419 | * out early from the iterator. Returns -EINVAL if presented with |
420 | * invalid pointers; or passes along the last return value of the | |
421 | * callback function, which should be 0 for success or anything else | |
422 | * to indicate failure. | |
8420bb13 PW |
423 | */ |
424 | int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, | |
425 | int (*fn)(struct powerdomain *pwrdm, | |
426 | struct clockdomain *clkdm)) | |
427 | { | |
8420bb13 PW |
428 | int ret = 0; |
429 | int i; | |
430 | ||
431 | if (!fn) | |
432 | return -EINVAL; | |
433 | ||
8420bb13 PW |
434 | for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++) |
435 | ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]); | |
436 | ||
8420bb13 PW |
437 | return ret; |
438 | } | |
439 | ||
048a7034 KH |
440 | /** |
441 | * pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in | |
442 | * @pwrdm: struct powerdomain * | |
443 | * | |
444 | * Return a pointer to the struct voltageomain that the specified powerdomain | |
445 | * @pwrdm exists in. | |
446 | */ | |
447 | struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm) | |
448 | { | |
449 | return pwrdm->voltdm.ptr; | |
450 | } | |
451 | ||
ad67ef68 PW |
452 | /** |
453 | * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain | |
454 | * @pwrdm: struct powerdomain * | |
455 | * | |
f0271d65 | 456 | * Return the number of controllable memory banks in powerdomain @pwrdm, |
ad67ef68 PW |
457 | * starting with 1. Returns -EINVAL if the powerdomain pointer is null. |
458 | */ | |
459 | int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm) | |
460 | { | |
461 | if (!pwrdm) | |
462 | return -EINVAL; | |
463 | ||
464 | return pwrdm->banks; | |
465 | } | |
466 | ||
467 | /** | |
468 | * pwrdm_set_next_pwrst - set next powerdomain power state | |
469 | * @pwrdm: struct powerdomain * to set | |
470 | * @pwrst: one of the PWRDM_POWER_* macros | |
471 | * | |
f0271d65 | 472 | * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain |
ad67ef68 PW |
473 | * may not enter this state immediately if the preconditions for this state |
474 | * have not been satisfied. Returns -EINVAL if the powerdomain pointer is | |
475 | * null or if the power state is invalid for the powerdomin, or returns 0 | |
476 | * upon success. | |
477 | */ | |
478 | int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) | |
479 | { | |
f327e07b RN |
480 | int ret = -EINVAL; |
481 | ||
ad67ef68 PW |
482 | if (!pwrdm) |
483 | return -EINVAL; | |
484 | ||
485 | if (!(pwrdm->pwrsts & (1 << pwrst))) | |
486 | return -EINVAL; | |
487 | ||
488 | pr_debug("powerdomain: setting next powerstate for %s to %0x\n", | |
489 | pwrdm->name, pwrst); | |
490 | ||
5e7c58dc JP |
491 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { |
492 | /* Trace the pwrdm desired target state */ | |
493 | trace_power_domain_target(pwrdm->name, pwrst, | |
494 | smp_processor_id()); | |
495 | /* Program the pwrdm desired target state */ | |
f327e07b | 496 | ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); |
5e7c58dc | 497 | } |
ad67ef68 | 498 | |
f327e07b | 499 | return ret; |
ad67ef68 PW |
500 | } |
501 | ||
502 | /** | |
503 | * pwrdm_read_next_pwrst - get next powerdomain power state | |
504 | * @pwrdm: struct powerdomain * to get power state | |
505 | * | |
f0271d65 | 506 | * Return the powerdomain @pwrdm's next power state. Returns -EINVAL |
ad67ef68 PW |
507 | * if the powerdomain pointer is null or returns the next power state |
508 | * upon success. | |
509 | */ | |
510 | int pwrdm_read_next_pwrst(struct powerdomain *pwrdm) | |
511 | { | |
f327e07b RN |
512 | int ret = -EINVAL; |
513 | ||
ad67ef68 PW |
514 | if (!pwrdm) |
515 | return -EINVAL; | |
516 | ||
f327e07b RN |
517 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst) |
518 | ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm); | |
519 | ||
520 | return ret; | |
ad67ef68 PW |
521 | } |
522 | ||
523 | /** | |
524 | * pwrdm_read_pwrst - get current powerdomain power state | |
525 | * @pwrdm: struct powerdomain * to get power state | |
526 | * | |
f0271d65 | 527 | * Return the powerdomain @pwrdm's current power state. Returns -EINVAL |
ad67ef68 PW |
528 | * if the powerdomain pointer is null or returns the current power state |
529 | * upon success. | |
530 | */ | |
531 | int pwrdm_read_pwrst(struct powerdomain *pwrdm) | |
532 | { | |
f327e07b RN |
533 | int ret = -EINVAL; |
534 | ||
ad67ef68 PW |
535 | if (!pwrdm) |
536 | return -EINVAL; | |
537 | ||
f327e07b RN |
538 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst) |
539 | ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm); | |
540 | ||
541 | return ret; | |
ad67ef68 PW |
542 | } |
543 | ||
544 | /** | |
545 | * pwrdm_read_prev_pwrst - get previous powerdomain power state | |
546 | * @pwrdm: struct powerdomain * to get previous power state | |
547 | * | |
f0271d65 | 548 | * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL |
ad67ef68 PW |
549 | * if the powerdomain pointer is null or returns the previous power state |
550 | * upon success. | |
551 | */ | |
552 | int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) | |
553 | { | |
f327e07b RN |
554 | int ret = -EINVAL; |
555 | ||
ad67ef68 PW |
556 | if (!pwrdm) |
557 | return -EINVAL; | |
558 | ||
f327e07b RN |
559 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst) |
560 | ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm); | |
561 | ||
562 | return ret; | |
ad67ef68 PW |
563 | } |
564 | ||
565 | /** | |
566 | * pwrdm_set_logic_retst - set powerdomain logic power state upon retention | |
567 | * @pwrdm: struct powerdomain * to set | |
568 | * @pwrst: one of the PWRDM_POWER_* macros | |
569 | * | |
f0271d65 PW |
570 | * Set the next power state @pwrst that the logic portion of the |
571 | * powerdomain @pwrdm will enter when the powerdomain enters retention. | |
572 | * This will be either RETENTION or OFF, if supported. Returns | |
573 | * -EINVAL if the powerdomain pointer is null or the target power | |
574 | * state is not not supported, or returns 0 upon success. | |
ad67ef68 PW |
575 | */ |
576 | int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) | |
577 | { | |
12627578 | 578 | int ret = -EINVAL; |
2bc4ef71 | 579 | |
ad67ef68 PW |
580 | if (!pwrdm) |
581 | return -EINVAL; | |
582 | ||
583 | if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) | |
584 | return -EINVAL; | |
585 | ||
586 | pr_debug("powerdomain: setting next logic powerstate for %s to %0x\n", | |
587 | pwrdm->name, pwrst); | |
588 | ||
12627578 RN |
589 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst) |
590 | ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst); | |
ad67ef68 | 591 | |
12627578 | 592 | return ret; |
ad67ef68 PW |
593 | } |
594 | ||
595 | /** | |
596 | * pwrdm_set_mem_onst - set memory power state while powerdomain ON | |
597 | * @pwrdm: struct powerdomain * to set | |
598 | * @bank: memory bank number to set (0-3) | |
599 | * @pwrst: one of the PWRDM_POWER_* macros | |
600 | * | |
f0271d65 PW |
601 | * Set the next power state @pwrst that memory bank @bank of the |
602 | * powerdomain @pwrdm will enter when the powerdomain enters the ON | |
603 | * state. @bank will be a number from 0 to 3, and represents different | |
604 | * types of memory, depending on the powerdomain. Returns -EINVAL if | |
605 | * the powerdomain pointer is null or the target power state is not | |
606 | * not supported for this memory bank, -EEXIST if the target memory | |
607 | * bank does not exist or is not controllable, or returns 0 upon | |
608 | * success. | |
ad67ef68 PW |
609 | */ |
610 | int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
611 | { | |
9b7fc907 | 612 | int ret = -EINVAL; |
ad67ef68 PW |
613 | |
614 | if (!pwrdm) | |
615 | return -EINVAL; | |
616 | ||
617 | if (pwrdm->banks < (bank + 1)) | |
618 | return -EEXIST; | |
619 | ||
620 | if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) | |
621 | return -EINVAL; | |
622 | ||
623 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
624 | "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst); | |
625 | ||
9b7fc907 RN |
626 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) |
627 | ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); | |
ad67ef68 | 628 | |
9b7fc907 | 629 | return ret; |
ad67ef68 PW |
630 | } |
631 | ||
632 | /** | |
633 | * pwrdm_set_mem_retst - set memory power state while powerdomain in RET | |
634 | * @pwrdm: struct powerdomain * to set | |
635 | * @bank: memory bank number to set (0-3) | |
636 | * @pwrst: one of the PWRDM_POWER_* macros | |
637 | * | |
f0271d65 PW |
638 | * Set the next power state @pwrst that memory bank @bank of the |
639 | * powerdomain @pwrdm will enter when the powerdomain enters the | |
640 | * RETENTION state. Bank will be a number from 0 to 3, and represents | |
641 | * different types of memory, depending on the powerdomain. @pwrst | |
642 | * will be either RETENTION or OFF, if supported. Returns -EINVAL if | |
643 | * the powerdomain pointer is null or the target power state is not | |
644 | * not supported for this memory bank, -EEXIST if the target memory | |
645 | * bank does not exist or is not controllable, or returns 0 upon | |
646 | * success. | |
ad67ef68 PW |
647 | */ |
648 | int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) | |
649 | { | |
9b7fc907 | 650 | int ret = -EINVAL; |
ad67ef68 PW |
651 | |
652 | if (!pwrdm) | |
653 | return -EINVAL; | |
654 | ||
655 | if (pwrdm->banks < (bank + 1)) | |
656 | return -EEXIST; | |
657 | ||
658 | if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) | |
659 | return -EINVAL; | |
660 | ||
661 | pr_debug("powerdomain: setting next memory powerstate for domain %s " | |
662 | "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst); | |
663 | ||
9b7fc907 RN |
664 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) |
665 | ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); | |
ad67ef68 | 666 | |
9b7fc907 | 667 | return ret; |
ad67ef68 PW |
668 | } |
669 | ||
670 | /** | |
671 | * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state | |
672 | * @pwrdm: struct powerdomain * to get current logic retention power state | |
673 | * | |
f0271d65 PW |
674 | * Return the power state that the logic portion of powerdomain @pwrdm |
675 | * will enter when the powerdomain enters retention. Returns -EINVAL | |
676 | * if the powerdomain pointer is null or returns the logic retention | |
677 | * power state upon success. | |
ad67ef68 PW |
678 | */ |
679 | int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) | |
680 | { | |
12627578 RN |
681 | int ret = -EINVAL; |
682 | ||
ad67ef68 PW |
683 | if (!pwrdm) |
684 | return -EINVAL; | |
685 | ||
12627578 RN |
686 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst) |
687 | ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm); | |
688 | ||
689 | return ret; | |
ad67ef68 PW |
690 | } |
691 | ||
692 | /** | |
693 | * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state | |
694 | * @pwrdm: struct powerdomain * to get previous logic power state | |
695 | * | |
f0271d65 PW |
696 | * Return the powerdomain @pwrdm's previous logic power state. Returns |
697 | * -EINVAL if the powerdomain pointer is null or returns the previous | |
698 | * logic power state upon success. | |
ad67ef68 PW |
699 | */ |
700 | int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) | |
701 | { | |
12627578 RN |
702 | int ret = -EINVAL; |
703 | ||
ad67ef68 PW |
704 | if (!pwrdm) |
705 | return -EINVAL; | |
706 | ||
12627578 RN |
707 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst) |
708 | ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm); | |
709 | ||
710 | return ret; | |
ad67ef68 PW |
711 | } |
712 | ||
1e3d0d2b TG |
713 | /** |
714 | * pwrdm_read_logic_retst - get next powerdomain logic power state | |
715 | * @pwrdm: struct powerdomain * to get next logic power state | |
716 | * | |
717 | * Return the powerdomain pwrdm's logic power state. Returns -EINVAL | |
718 | * if the powerdomain pointer is null or returns the next logic | |
719 | * power state upon success. | |
720 | */ | |
721 | int pwrdm_read_logic_retst(struct powerdomain *pwrdm) | |
722 | { | |
12627578 RN |
723 | int ret = -EINVAL; |
724 | ||
1e3d0d2b TG |
725 | if (!pwrdm) |
726 | return -EINVAL; | |
727 | ||
12627578 RN |
728 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst) |
729 | ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm); | |
730 | ||
731 | return ret; | |
1e3d0d2b TG |
732 | } |
733 | ||
ad67ef68 PW |
734 | /** |
735 | * pwrdm_read_mem_pwrst - get current memory bank power state | |
736 | * @pwrdm: struct powerdomain * to get current memory bank power state | |
737 | * @bank: memory bank number (0-3) | |
738 | * | |
f0271d65 PW |
739 | * Return the powerdomain @pwrdm's current memory power state for bank |
740 | * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
ad67ef68 PW |
741 | * the target memory bank does not exist or is not controllable, or |
742 | * returns the current memory power state upon success. | |
743 | */ | |
744 | int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
745 | { | |
9b7fc907 | 746 | int ret = -EINVAL; |
ad67ef68 PW |
747 | |
748 | if (!pwrdm) | |
9b7fc907 | 749 | return ret; |
ad67ef68 PW |
750 | |
751 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 752 | return ret; |
ad67ef68 | 753 | |
3863c74b TG |
754 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
755 | bank = 1; | |
756 | ||
9b7fc907 RN |
757 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) |
758 | ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 759 | |
9b7fc907 | 760 | return ret; |
ad67ef68 PW |
761 | } |
762 | ||
763 | /** | |
764 | * pwrdm_read_prev_mem_pwrst - get previous memory bank power state | |
765 | * @pwrdm: struct powerdomain * to get previous memory bank power state | |
766 | * @bank: memory bank number (0-3) | |
767 | * | |
f0271d65 PW |
768 | * Return the powerdomain @pwrdm's previous memory power state for |
769 | * bank @bank. Returns -EINVAL if the powerdomain pointer is null, | |
770 | * -EEXIST if the target memory bank does not exist or is not | |
771 | * controllable, or returns the previous memory power state upon | |
772 | * success. | |
ad67ef68 PW |
773 | */ |
774 | int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) | |
775 | { | |
9b7fc907 | 776 | int ret = -EINVAL; |
ad67ef68 PW |
777 | |
778 | if (!pwrdm) | |
9b7fc907 | 779 | return ret; |
ad67ef68 PW |
780 | |
781 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 782 | return ret; |
ad67ef68 | 783 | |
3863c74b TG |
784 | if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) |
785 | bank = 1; | |
786 | ||
9b7fc907 RN |
787 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) |
788 | ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); | |
ad67ef68 | 789 | |
9b7fc907 | 790 | return ret; |
ad67ef68 PW |
791 | } |
792 | ||
1e3d0d2b TG |
793 | /** |
794 | * pwrdm_read_mem_retst - get next memory bank power state | |
795 | * @pwrdm: struct powerdomain * to get mext memory bank power state | |
796 | * @bank: memory bank number (0-3) | |
797 | * | |
798 | * Return the powerdomain pwrdm's next memory power state for bank | |
799 | * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if | |
800 | * the target memory bank does not exist or is not controllable, or | |
801 | * returns the next memory power state upon success. | |
802 | */ | |
803 | int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) | |
804 | { | |
9b7fc907 | 805 | int ret = -EINVAL; |
1e3d0d2b TG |
806 | |
807 | if (!pwrdm) | |
9b7fc907 | 808 | return ret; |
1e3d0d2b TG |
809 | |
810 | if (pwrdm->banks < (bank + 1)) | |
9b7fc907 | 811 | return ret; |
1e3d0d2b | 812 | |
9b7fc907 RN |
813 | if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) |
814 | ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); | |
1e3d0d2b | 815 | |
9b7fc907 | 816 | return ret; |
1e3d0d2b TG |
817 | } |
818 | ||
ad67ef68 PW |
819 | /** |
820 | * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm | |
821 | * @pwrdm: struct powerdomain * to clear | |
822 | * | |
f0271d65 PW |
823 | * Clear the powerdomain's previous power state register @pwrdm. |
824 | * Clears the entire register, including logic and memory bank | |
825 | * previous power states. Returns -EINVAL if the powerdomain pointer | |
826 | * is null, or returns 0 upon success. | |
ad67ef68 PW |
827 | */ |
828 | int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) | |
829 | { | |
9b7fc907 RN |
830 | int ret = -EINVAL; |
831 | ||
ad67ef68 | 832 | if (!pwrdm) |
9b7fc907 | 833 | return ret; |
ad67ef68 PW |
834 | |
835 | /* | |
836 | * XXX should get the powerdomain's current state here; | |
837 | * warn & fail if it is not ON. | |
838 | */ | |
839 | ||
840 | pr_debug("powerdomain: clearing previous power state reg for %s\n", | |
841 | pwrdm->name); | |
842 | ||
9b7fc907 RN |
843 | if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) |
844 | ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); | |
ad67ef68 | 845 | |
9b7fc907 | 846 | return ret; |
ad67ef68 PW |
847 | } |
848 | ||
0b7cbfb5 PW |
849 | /** |
850 | * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm | |
851 | * @pwrdm: struct powerdomain * | |
852 | * | |
853 | * Enable automatic context save-and-restore upon power state change | |
f0271d65 PW |
854 | * for some devices in the powerdomain @pwrdm. Warning: this only |
855 | * affects a subset of devices in a powerdomain; check the TRM | |
856 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
857 | * the powerdomain does not support automatic save-and-restore, or | |
858 | * returns 0 upon success. | |
0b7cbfb5 PW |
859 | */ |
860 | int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) | |
861 | { | |
9b7fc907 RN |
862 | int ret = -EINVAL; |
863 | ||
0b7cbfb5 | 864 | if (!pwrdm) |
9b7fc907 | 865 | return ret; |
0b7cbfb5 PW |
866 | |
867 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 868 | return ret; |
0b7cbfb5 PW |
869 | |
870 | pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", | |
871 | pwrdm->name); | |
872 | ||
9b7fc907 RN |
873 | if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) |
874 | ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 875 | |
9b7fc907 | 876 | return ret; |
0b7cbfb5 PW |
877 | } |
878 | ||
879 | /** | |
880 | * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm | |
881 | * @pwrdm: struct powerdomain * | |
882 | * | |
883 | * Disable automatic context save-and-restore upon power state change | |
f0271d65 PW |
884 | * for some devices in the powerdomain @pwrdm. Warning: this only |
885 | * affects a subset of devices in a powerdomain; check the TRM | |
886 | * closely. Returns -EINVAL if the powerdomain pointer is null or if | |
887 | * the powerdomain does not support automatic save-and-restore, or | |
888 | * returns 0 upon success. | |
0b7cbfb5 PW |
889 | */ |
890 | int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) | |
891 | { | |
9b7fc907 RN |
892 | int ret = -EINVAL; |
893 | ||
0b7cbfb5 | 894 | if (!pwrdm) |
9b7fc907 | 895 | return ret; |
0b7cbfb5 PW |
896 | |
897 | if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) | |
9b7fc907 | 898 | return ret; |
0b7cbfb5 PW |
899 | |
900 | pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", | |
901 | pwrdm->name); | |
902 | ||
9b7fc907 RN |
903 | if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) |
904 | ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); | |
0b7cbfb5 | 905 | |
9b7fc907 | 906 | return ret; |
0b7cbfb5 PW |
907 | } |
908 | ||
909 | /** | |
910 | * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR | |
911 | * @pwrdm: struct powerdomain * | |
912 | * | |
f0271d65 | 913 | * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore |
0b7cbfb5 PW |
914 | * for some devices, or 0 if it does not. |
915 | */ | |
916 | bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) | |
917 | { | |
918 | return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0; | |
919 | } | |
920 | ||
90dbc7b0 RN |
921 | /** |
922 | * pwrdm_set_lowpwrstchange - Request a low power state change | |
923 | * @pwrdm: struct powerdomain * | |
924 | * | |
925 | * Allows a powerdomain to transtion to a lower power sleep state | |
926 | * from an existing sleep state without waking up the powerdomain. | |
927 | * Returns -EINVAL if the powerdomain pointer is null or if the | |
928 | * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0 | |
929 | * upon success. | |
930 | */ | |
931 | int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) | |
932 | { | |
9b7fc907 RN |
933 | int ret = -EINVAL; |
934 | ||
90dbc7b0 RN |
935 | if (!pwrdm) |
936 | return -EINVAL; | |
937 | ||
938 | if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) | |
939 | return -EINVAL; | |
940 | ||
941 | pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n", | |
942 | pwrdm->name); | |
943 | ||
9b7fc907 RN |
944 | if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange) |
945 | ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); | |
90dbc7b0 | 946 | |
9b7fc907 | 947 | return ret; |
90dbc7b0 RN |
948 | } |
949 | ||
ad67ef68 PW |
950 | /** |
951 | * pwrdm_wait_transition - wait for powerdomain power transition to finish | |
952 | * @pwrdm: struct powerdomain * to wait for | |
953 | * | |
f0271d65 | 954 | * If the powerdomain @pwrdm is in the process of a state transition, |
ad67ef68 PW |
955 | * spin until it completes the power transition, or until an iteration |
956 | * bailout value is reached. Returns -EINVAL if the powerdomain | |
957 | * pointer is null, -EAGAIN if the bailout value was reached, or | |
958 | * returns 0 upon success. | |
959 | */ | |
960 | int pwrdm_wait_transition(struct powerdomain *pwrdm) | |
961 | { | |
9b7fc907 | 962 | int ret = -EINVAL; |
ad67ef68 PW |
963 | |
964 | if (!pwrdm) | |
965 | return -EINVAL; | |
966 | ||
9b7fc907 RN |
967 | if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition) |
968 | ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); | |
ad67ef68 | 969 | |
9b7fc907 | 970 | return ret; |
ad67ef68 PW |
971 | } |
972 | ||
ba20bb12 PDS |
973 | int pwrdm_state_switch(struct powerdomain *pwrdm) |
974 | { | |
975 | return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW); | |
976 | } | |
977 | ||
978 | int pwrdm_clkdm_state_switch(struct clockdomain *clkdm) | |
979 | { | |
980 | if (clkdm != NULL && clkdm->pwrdm.ptr != NULL) { | |
981 | pwrdm_wait_transition(clkdm->pwrdm.ptr); | |
982 | return pwrdm_state_switch(clkdm->pwrdm.ptr); | |
983 | } | |
984 | ||
985 | return -EINVAL; | |
986 | } | |
ba20bb12 PDS |
987 | |
988 | int pwrdm_pre_transition(void) | |
989 | { | |
6199ab26 | 990 | pwrdm_for_each(_pwrdm_pre_transition_cb, NULL); |
ba20bb12 PDS |
991 | return 0; |
992 | } | |
993 | ||
994 | int pwrdm_post_transition(void) | |
995 | { | |
6199ab26 | 996 | pwrdm_for_each(_pwrdm_post_transition_cb, NULL); |
ba20bb12 PDS |
997 | return 0; |
998 | } | |
7f595674 KH |
999 | |
1000 | /** | |
1001 | * pwrdm_get_context_loss_count - get powerdomain's context loss count | |
1002 | * @pwrdm: struct powerdomain * to wait for | |
1003 | * | |
1004 | * Context loss count is the sum of powerdomain off-mode counter, the | |
fc013873 | 1005 | * logic off counter and the per-bank memory off counter. Returns negative |
7f595674 KH |
1006 | * (and WARNs) upon error, otherwise, returns the context loss count. |
1007 | */ | |
fc013873 | 1008 | int pwrdm_get_context_loss_count(struct powerdomain *pwrdm) |
7f595674 KH |
1009 | { |
1010 | int i, count; | |
1011 | ||
1012 | if (!pwrdm) { | |
1013 | WARN(1, "powerdomain: %s: pwrdm is null\n", __func__); | |
fc013873 | 1014 | return -ENODEV; |
7f595674 KH |
1015 | } |
1016 | ||
1017 | count = pwrdm->state_counter[PWRDM_POWER_OFF]; | |
1018 | count += pwrdm->ret_logic_off_counter; | |
1019 | ||
1020 | for (i = 0; i < pwrdm->banks; i++) | |
1021 | count += pwrdm->ret_mem_off_counter[i]; | |
1022 | ||
fc013873 TV |
1023 | /* |
1024 | * Context loss count has to be a non-negative value. Clear the sign | |
1025 | * bit to get a value range from 0 to INT_MAX. | |
1026 | */ | |
1027 | count &= INT_MAX; | |
1028 | ||
1029 | pr_debug("powerdomain: %s: context loss count = %d\n", | |
7f595674 KH |
1030 | pwrdm->name, count); |
1031 | ||
1032 | return count; | |
1033 | } | |
694606c4 PW |
1034 | |
1035 | /** | |
1036 | * pwrdm_can_ever_lose_context - can this powerdomain ever lose context? | |
1037 | * @pwrdm: struct powerdomain * | |
1038 | * | |
1039 | * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain | |
1040 | * can lose either memory or logic context or if @pwrdm is invalid, or | |
1041 | * returns 0 otherwise. This function is not concerned with how the | |
1042 | * powerdomain registers are programmed (i.e., to go off or not); it's | |
1043 | * concerned with whether it's ever possible for this powerdomain to | |
1044 | * go off while some other part of the chip is active. This function | |
1045 | * assumes that every powerdomain can go to either ON or INACTIVE. | |
1046 | */ | |
1047 | bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm) | |
1048 | { | |
1049 | int i; | |
1050 | ||
1051 | if (IS_ERR_OR_NULL(pwrdm)) { | |
1052 | pr_debug("powerdomain: %s: invalid powerdomain pointer\n", | |
1053 | __func__); | |
1054 | return 1; | |
1055 | } | |
1056 | ||
1057 | if (pwrdm->pwrsts & PWRSTS_OFF) | |
1058 | return 1; | |
1059 | ||
1060 | if (pwrdm->pwrsts & PWRSTS_RET) { | |
1061 | if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF) | |
1062 | return 1; | |
1063 | ||
1064 | for (i = 0; i < pwrdm->banks; i++) | |
1065 | if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF) | |
1066 | return 1; | |
1067 | } | |
1068 | ||
1069 | for (i = 0; i < pwrdm->banks; i++) | |
1070 | if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF) | |
1071 | return 1; | |
1072 | ||
1073 | return 0; | |
1074 | } |