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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-08-14 18:08:24 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-31 03:11:08 +0400 |
| commit | d4019f0a92ab802f385cc9c8ad3ab7b5449712cb (patch) | |
| tree | ebd06695585e457ae1bf219653452b111e7508db /drivers/cpufreq/ppc_cbe_cpufreq.c | |
| parent | 7dbf694db6ac7c759599316d50d7050efcbd512a (diff) | |
| download | linux-d4019f0a92ab802f385cc9c8ad3ab7b5449712cb.tar.xz | |
cpufreq: move freq change notifications to cpufreq core
Most of the drivers do following in their ->target_index() routines:
struct cpufreq_freqs freqs;
freqs.old = old freq...
freqs.new = new freq...
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
/* Change rate here */
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
This is replicated over all cpufreq drivers today and there doesn't exists a
good enough reason why this shouldn't be moved to cpufreq core instead.
There are few special cases though, like exynos5440, which doesn't do everything
on the call to ->target_index() routine and call some kind of bottom halves for
doing this work, work/tasklet/etc..
They may continue doing notification from their own code as flag:
CPUFREQ_ASYNC_NOTIFICATION is already set for them.
All drivers are also modified in this patch to avoid breaking 'git bisect', as
double notification would happen otherwise.
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Russell King <linux@arm.linux.org.uk>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/ppc_cbe_cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/ppc_cbe_cpufreq.c | 19 |
1 files changed, 1 insertions, 18 deletions
diff --git a/drivers/cpufreq/ppc_cbe_cpufreq.c b/drivers/cpufreq/ppc_cbe_cpufreq.c index 52f707d5f458..e42ca9c31cea 100644 --- a/drivers/cpufreq/ppc_cbe_cpufreq.c +++ b/drivers/cpufreq/ppc_cbe_cpufreq.c @@ -30,9 +30,6 @@ #include "ppc_cbe_cpufreq.h" -static DEFINE_MUTEX(cbe_switch_mutex); - - /* the CBE supports an 8 step frequency scaling */ static struct cpufreq_frequency_table cbe_freqs[] = { {1, 0}, @@ -131,27 +128,13 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) static int cbe_cpufreq_target(struct cpufreq_policy *policy, unsigned int cbe_pmode_new) { - int rc; - struct cpufreq_freqs freqs; - - freqs.old = policy->cur; - freqs.new = cbe_freqs[cbe_pmode_new].frequency; - - mutex_lock(&cbe_switch_mutex); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - pr_debug("setting frequency for cpu %d to %d kHz, " \ "1/%d of max frequency\n", policy->cpu, cbe_freqs[cbe_pmode_new].frequency, cbe_freqs[cbe_pmode_new].driver_data); - rc = set_pmode(policy->cpu, cbe_pmode_new); - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - mutex_unlock(&cbe_switch_mutex); - - return rc; + return set_pmode(policy->cpu, cbe_pmode_new); } static struct cpufreq_driver cbe_cpufreq_driver = { |