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>
diff --git a/drivers/cpufreq/at32ap-cpufreq.c b/drivers/cpufreq/at32ap-cpufreq.c
index 81d0752..856ad80 100644
--- a/drivers/cpufreq/at32ap-cpufreq.c
+++ b/drivers/cpufreq/at32ap-cpufreq.c
@@ -37,27 +37,23 @@
static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
{
- struct cpufreq_freqs freqs;
+ unsigned int old_freq, new_freq;
- freqs.old = at32_get_speed(0);
- freqs.new = freq_table[index].frequency;
+ old_freq = at32_get_speed(0);
+ new_freq = freq_table[index].frequency;
if (!ref_freq) {
- ref_freq = freqs.old;
+ ref_freq = old_freq;
loops_per_jiffy_ref = boot_cpu_data.loops_per_jiffy;
}
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
- if (freqs.old < freqs.new)
+ if (old_freq < new_freq)
boot_cpu_data.loops_per_jiffy = cpufreq_scale(
- loops_per_jiffy_ref, ref_freq, freqs.new);
- clk_set_rate(cpuclk, freqs.new * 1000);
- if (freqs.new < freqs.old)
+ loops_per_jiffy_ref, ref_freq, new_freq);
+ clk_set_rate(cpuclk, new_freq * 1000);
+ if (new_freq < old_freq)
boot_cpu_data.loops_per_jiffy = cpufreq_scale(
- loops_per_jiffy_ref, ref_freq, freqs.new);
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- pr_debug("cpufreq: set frequency %u Hz\n", freqs.new * 1000);
+ loops_per_jiffy_ref, ref_freq, new_freq);
return 0;
}