aboutsummaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/cpufreq/cpufreq.c95
1 files changed, 7 insertions, 88 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index fd69086d08d5..2968ed6a9c49 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1250,20 +1250,11 @@ static int cpufreq_suspend(struct sys_device *sysdev, pm_message_t pmsg)
1250{ 1250{
1251 int ret = 0; 1251 int ret = 0;
1252 1252
1253#ifdef __powerpc__
1254 int cpu = sysdev->id; 1253 int cpu = sysdev->id;
1255 unsigned int cur_freq = 0;
1256 struct cpufreq_policy *cpu_policy; 1254 struct cpufreq_policy *cpu_policy;
1257 1255
1258 dprintk("suspending cpu %u\n", cpu); 1256 dprintk("suspending cpu %u\n", cpu);
1259 1257
1260 /*
1261 * This whole bogosity is here because Powerbooks are made of fail.
1262 * No sane platform should need any of the code below to be run.
1263 * (it's entirely the wrong thing to do, as driver->get may
1264 * reenable interrupts on some architectures).
1265 */
1266
1267 if (!cpu_online(cpu)) 1258 if (!cpu_online(cpu))
1268 return 0; 1259 return 0;
1269 1260
@@ -1282,47 +1273,13 @@ static int cpufreq_suspend(struct sys_device *sysdev, pm_message_t pmsg)
1282 1273
1283 if (cpufreq_driver->suspend) { 1274 if (cpufreq_driver->suspend) {
1284 ret = cpufreq_driver->suspend(cpu_policy, pmsg); 1275 ret = cpufreq_driver->suspend(cpu_policy, pmsg);
1285 if (ret) { 1276 if (ret)
1286 printk(KERN_ERR "cpufreq: suspend failed in ->suspend " 1277 printk(KERN_ERR "cpufreq: suspend failed in ->suspend "
1287 "step on CPU %u\n", cpu_policy->cpu); 1278 "step on CPU %u\n", cpu_policy->cpu);
1288 goto out;
1289 }
1290 }
1291
1292 if (cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)
1293 goto out;
1294
1295 if (cpufreq_driver->get)
1296 cur_freq = cpufreq_driver->get(cpu_policy->cpu);
1297
1298 if (!cur_freq || !cpu_policy->cur) {
1299 printk(KERN_ERR "cpufreq: suspend failed to assert current "
1300 "frequency is what timing core thinks it is.\n");
1301 goto out;
1302 }
1303
1304 if (unlikely(cur_freq != cpu_policy->cur)) {
1305 struct cpufreq_freqs freqs;
1306
1307 if (!(cpufreq_driver->flags & CPUFREQ_PM_NO_WARN))
1308 dprintk("Warning: CPU frequency is %u, "
1309 "cpufreq assumed %u kHz.\n",
1310 cur_freq, cpu_policy->cur);
1311
1312 freqs.cpu = cpu;
1313 freqs.old = cpu_policy->cur;
1314 freqs.new = cur_freq;
1315
1316 srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
1317 CPUFREQ_SUSPENDCHANGE, &freqs);
1318 adjust_jiffies(CPUFREQ_SUSPENDCHANGE, &freqs);
1319
1320 cpu_policy->cur = cur_freq;
1321 } 1279 }
1322 1280
1323out: 1281out:
1324 cpufreq_cpu_put(cpu_policy); 1282 cpufreq_cpu_put(cpu_policy);
1325#endif /* __powerpc__ */
1326 return ret; 1283 return ret;
1327} 1284}
1328 1285
@@ -1330,24 +1287,21 @@ out:
1330 * cpufreq_resume - restore proper CPU frequency handling after resume 1287 * cpufreq_resume - restore proper CPU frequency handling after resume
1331 * 1288 *
1332 * 1.) resume CPUfreq hardware support (cpufreq_driver->resume()) 1289 * 1.) resume CPUfreq hardware support (cpufreq_driver->resume())
1333 * 2.) if ->target and !CPUFREQ_CONST_LOOPS: verify we're in sync 1290 * 2.) schedule call cpufreq_update_policy() ASAP as interrupts are
1334 * 3.) schedule call cpufreq_update_policy() ASAP as interrupts are 1291 * restored. It will verify that the current freq is in sync with
1335 * restored. 1292 * what we believe it to be. This is a bit later than when it
1293 * should be, but nonethteless it's better than calling
1294 * cpufreq_driver->get() here which might re-enable interrupts...
1336 */ 1295 */
1337static int cpufreq_resume(struct sys_device *sysdev) 1296static int cpufreq_resume(struct sys_device *sysdev)
1338{ 1297{
1339 int ret = 0; 1298 int ret = 0;
1340 1299
1341#ifdef __powerpc__
1342 int cpu = sysdev->id; 1300 int cpu = sysdev->id;
1343 struct cpufreq_policy *cpu_policy; 1301 struct cpufreq_policy *cpu_policy;
1344 1302
1345 dprintk("resuming cpu %u\n", cpu); 1303 dprintk("resuming cpu %u\n", cpu);
1346 1304
1347 /* As with the ->suspend method, all the code below is
1348 * only necessary because Powerbooks suck.
1349 * See commit 42d4dc3f4e1e for jokes. */
1350
1351 if (!cpu_online(cpu)) 1305 if (!cpu_online(cpu))
1352 return 0; 1306 return 0;
1353 1307
@@ -1373,45 +1327,10 @@ static int cpufreq_resume(struct sys_device *sysdev)
1373 } 1327 }
1374 } 1328 }
1375 1329
1376 if (!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
1377 unsigned int cur_freq = 0;
1378
1379 if (cpufreq_driver->get)
1380 cur_freq = cpufreq_driver->get(cpu_policy->cpu);
1381
1382 if (!cur_freq || !cpu_policy->cur) {
1383 printk(KERN_ERR "cpufreq: resume failed to assert "
1384 "current frequency is what timing core "
1385 "thinks it is.\n");
1386 goto out;
1387 }
1388
1389 if (unlikely(cur_freq != cpu_policy->cur)) {
1390 struct cpufreq_freqs freqs;
1391
1392 if (!(cpufreq_driver->flags & CPUFREQ_PM_NO_WARN))
1393 dprintk("Warning: CPU frequency "
1394 "is %u, cpufreq assumed %u kHz.\n",
1395 cur_freq, cpu_policy->cur);
1396
1397 freqs.cpu = cpu;
1398 freqs.old = cpu_policy->cur;
1399 freqs.new = cur_freq;
1400
1401 srcu_notifier_call_chain(
1402 &cpufreq_transition_notifier_list,
1403 CPUFREQ_RESUMECHANGE, &freqs);
1404 adjust_jiffies(CPUFREQ_RESUMECHANGE, &freqs);
1405
1406 cpu_policy->cur = cur_freq;
1407 }
1408 }
1409
1410out:
1411 schedule_work(&cpu_policy->update); 1330 schedule_work(&cpu_policy->update);
1331
1412fail: 1332fail:
1413 cpufreq_cpu_put(cpu_policy); 1333 cpufreq_cpu_put(cpu_policy);
1414#endif /* __powerpc__ */
1415 return ret; 1334 return ret;
1416} 1335}
1417 1336