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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-04-29 07:40:12 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-29 07:40:12 -0700
commit42d4dc3f4e1ec1396371aac89d0dccfdd977191b (patch)
treec5b67100cde9769c56f6872a5675d67f0e5f0df5 /include/linux/cpufreq.h
parentc60c390620e0abb60d4ae8c43583714bda27763f (diff)
[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.h5
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);