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/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c
index 11a65be..d02ccd1 100644
--- a/drivers/cpufreq/spear-cpufreq.c
+++ b/drivers/cpufreq/spear-cpufreq.c
@@ -107,12 +107,10 @@
static int spear_cpufreq_target(struct cpufreq_policy *policy,
unsigned int index)
{
- struct cpufreq_freqs freqs;
long newfreq;
struct clk *srcclk;
int ret, mult = 1;
- freqs.old = spear_cpufreq_get(0);
newfreq = spear_cpufreq.freq_tbl[index].frequency * 1000;
if (of_machine_is_compatible("st,spear1340")) {
@@ -145,23 +143,14 @@
return newfreq;
}
- freqs.new = newfreq / 1000;
- freqs.new /= mult;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
if (mult == 2)
ret = spear1340_set_cpu_rate(srcclk, newfreq);
else
ret = clk_set_rate(spear_cpufreq.clk, newfreq);
- /* Get current rate after clk_set_rate, in case of failure */
- if (ret) {
+ if (ret)
pr_err("CPU Freq: cpu clk_set_rate failed: %d\n", ret);
- freqs.new = clk_get_rate(spear_cpufreq.clk) / 1000;
- }
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return ret;
}
