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authorViresh Kumar <viresh.kumar@linaro.org>2013-08-14 18:08:24 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-31 03:11:08 +0400
commitd4019f0a92ab802f385cc9c8ad3ab7b5449712cb (patch)
treeebd06695585e457ae1bf219653452b111e7508db /drivers/cpufreq/speedstep-ich.c
parent7dbf694db6ac7c759599316d50d7050efcbd512a (diff)
downloadlinux-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/speedstep-ich.c')
-rw-r--r--drivers/cpufreq/speedstep-ich.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/cpufreq/speedstep-ich.c b/drivers/cpufreq/speedstep-ich.c
index 707721ebb853..7639b2be2a90 100644
--- a/drivers/cpufreq/speedstep-ich.c
+++ b/drivers/cpufreq/speedstep-ich.c
@@ -258,21 +258,12 @@ static unsigned int speedstep_get(unsigned int cpu)
static int speedstep_target(struct cpufreq_policy *policy, unsigned int index)
{
unsigned int policy_cpu;
- struct cpufreq_freqs freqs;
policy_cpu = cpumask_any_and(policy->cpus, cpu_online_mask);
- freqs.old = speedstep_get(policy_cpu);
- freqs.new = speedstep_freqs[index].frequency;
-
- pr_debug("transiting from %u to %u kHz\n", freqs.old, freqs.new);
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
smp_call_function_single(policy_cpu, _speedstep_set_state, &index,
true);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
return 0;
}