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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2005-04-29 18:40:12 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-29 18:40:12 +0400 |
| commit | 42d4dc3f4e1ec1396371aac89d0dccfdd977191b (patch) | |
| tree | c5b67100cde9769c56f6872a5675d67f0e5f0df5 /include/linux/cpufreq.h | |
| parent | c60c390620e0abb60d4ae8c43583714bda27763f (diff) | |
| download | linux-42d4dc3f4e1ec1396371aac89d0dccfdd977191b.tar.xz | |
[PATCH] Add suspend method to cpufreq core
In order to properly fix some issues with cpufreq vs. sleep on
PowerBooks, I had to add a suspend callback to the pmac_cpufreq driver.
I must force a switch to full speed before sleep and I switch back to
previous speed on resume.
I also added a driver flag to disable the warnings in suspend/resume
since it is expected in this case to have different speed (and I want it
to fixup the jiffies properly).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/cpufreq.h')
| -rw-r--r-- | include/linux/cpufreq.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 910eca35583d..f21af067d015 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -103,6 +103,7 @@ struct cpufreq_policy { #define CPUFREQ_PRECHANGE (0) #define CPUFREQ_POSTCHANGE (1) #define CPUFREQ_RESUMECHANGE (8) +#define CPUFREQ_SUSPENDCHANGE (9) struct cpufreq_freqs { unsigned int cpu; /* cpu nr */ @@ -200,6 +201,7 @@ struct cpufreq_driver { /* optional */ int (*exit) (struct cpufreq_policy *policy); + int (*suspend) (struct cpufreq_policy *policy, u32 state); int (*resume) (struct cpufreq_policy *policy); struct freq_attr **attr; }; @@ -211,7 +213,8 @@ struct cpufreq_driver { #define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel * "constants" aren't affected by * frequency transitions */ - +#define CPUFREQ_PM_NO_WARN 0x04 /* don't warn on suspend/resume speed + * mismatches */ int cpufreq_register_driver(struct cpufreq_driver *driver_data); int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); |