diff options
author | Francesco VIRLINZI <francesco.virlinzi@st.com> | 2009-03-11 06:39:02 -0400 |
---|---|---|
committer | Paul Mundt <lethal@linux-sh.org> | 2009-03-16 06:46:17 -0400 |
commit | a83c0b739f3ad1887704cfa9f1ee5ee208cf1532 (patch) | |
tree | 213fac95be0a7215a2f381c421b93bc1466e08a2 /arch/sh/mm | |
parent | 039a718ebb37298de87801288673859ac40b6fc4 (diff) |
sh: PMB hibernation support
This implements preliminary suspend/resume support for the PMB.
Signed-off-by: Francesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r-- | arch/sh/mm/pmb.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 84241676265e..b1a714a92b14 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c | |||
@@ -15,6 +15,8 @@ | |||
15 | */ | 15 | */ |
16 | #include <linux/init.h> | 16 | #include <linux/init.h> |
17 | #include <linux/kernel.h> | 17 | #include <linux/kernel.h> |
18 | #include <linux/sysdev.h> | ||
19 | #include <linux/cpu.h> | ||
18 | #include <linux/module.h> | 20 | #include <linux/module.h> |
19 | #include <linux/slab.h> | 21 | #include <linux/slab.h> |
20 | #include <linux/bitops.h> | 22 | #include <linux/bitops.h> |
@@ -402,3 +404,39 @@ static int __init pmb_debugfs_init(void) | |||
402 | return 0; | 404 | return 0; |
403 | } | 405 | } |
404 | postcore_initcall(pmb_debugfs_init); | 406 | postcore_initcall(pmb_debugfs_init); |
407 | |||
408 | #ifdef CONFIG_PM | ||
409 | static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state) | ||
410 | { | ||
411 | static pm_message_t prev_state; | ||
412 | |||
413 | /* Restore the PMB after a resume from hibernation */ | ||
414 | if (state.event == PM_EVENT_ON && | ||
415 | prev_state.event == PM_EVENT_FREEZE) { | ||
416 | struct pmb_entry *pmbe; | ||
417 | spin_lock_irq(&pmb_list_lock); | ||
418 | for (pmbe = pmb_list; pmbe; pmbe = pmbe->next) | ||
419 | set_pmb_entry(pmbe); | ||
420 | spin_unlock_irq(&pmb_list_lock); | ||
421 | } | ||
422 | prev_state = state; | ||
423 | return 0; | ||
424 | } | ||
425 | |||
426 | static int pmb_sysdev_resume(struct sys_device *dev) | ||
427 | { | ||
428 | return pmb_sysdev_suspend(dev, PMSG_ON); | ||
429 | } | ||
430 | |||
431 | static struct sysdev_driver pmb_sysdev_driver = { | ||
432 | .suspend = pmb_sysdev_suspend, | ||
433 | .resume = pmb_sysdev_resume, | ||
434 | }; | ||
435 | |||
436 | static int __init pmb_sysdev_init(void) | ||
437 | { | ||
438 | return sysdev_driver_register(&cpu_sysdev_class, &pmb_sysdev_driver); | ||
439 | } | ||
440 | |||
441 | subsys_initcall(pmb_sysdev_init); | ||
442 | #endif | ||