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cpufreq: distinguish drivers that do asynchronous notifications

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There are few special cases like exynos5440 which doesn't send POSTCHANGE
notification from their ->target() routine and call some kind of bottom halves
for doing this work, work/tasklet/etc.. From which they finally send POSTCHANGE
notification.

Its better if we distinguish them from other cpufreq drivers in some way so that
core can handle them specially. So this patch introduces another flag:
CPUFREQ_ASYNC_NOTIFICATION, which will be set by such drivers.

This also changes exynos5440-cpufreq.c and powernow-k8 in order to set this
flag.

Acked-by: Amit Daniel Kachhap <[email protected]>
Acked-by: Kukjin Kim <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Viresh Kumar 2013-10-29 18:56:06 +05:30 • committed by Rafael J. Wysocki
commit 7dbf694db6
3 changed files with 9 additions and 1 deletions
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2
drivers/cpufreq/exynos5440-cpufreq.c
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@ -312,7 +312,7 @@ static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver exynos_driver = {
.flags = CPUFREQ_STICKY,
.flags = CPUFREQ_STICKY | CPUFREQ_ASYNC_NOTIFICATION,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = exynos_target,
.get = exynos_getspeed,

1
drivers/cpufreq/powernow-k8.c
View file

@ -1204,6 +1204,7 @@ out:
}
static struct cpufreq_driver cpufreq_amd64_driver = {
.flags = CPUFREQ_ASYNC_NOTIFICATION,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = powernowk8_target,
.bios_limit = acpi_processor_get_bios_limit,