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/sa1110-cpufreq.c b/drivers/cpufreq/sa1110-cpufreq.c
index 55b1818c..2c2b2e6 100644
--- a/drivers/cpufreq/sa1110-cpufreq.c
+++ b/drivers/cpufreq/sa1110-cpufreq.c
@@ -232,15 +232,11 @@
static int sa1110_target(struct cpufreq_policy *policy, unsigned int ppcr)
{
struct sdram_params *sdram = &sdram_params;
- struct cpufreq_freqs freqs;
struct sdram_info sd;
unsigned long flags;
unsigned int unused;
- freqs.old = sa11x0_getspeed(0);
- freqs.new = sa11x0_freq_table[ppcr].frequency;
-
- sdram_calculate_timing(&sd, freqs.new, sdram);
+ sdram_calculate_timing(&sd, sa11x0_freq_table[ppcr].frequency, sdram);
#if 0
/*
@@ -259,8 +255,6 @@
sd.mdcas[2] = 0xaaaaaaaa;
#endif
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
/*
* The clock could be going away for some time. Set the SDRAMs
* to refresh rapidly (every 64 memory clock cycles). To get
@@ -305,9 +299,7 @@
/*
* Now, return the SDRAM refresh back to normal.
*/
- sdram_update_refresh(freqs.new, sdram);
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+ sdram_update_refresh(sa11x0_freq_table[ppcr].frequency, sdram);
return 0;
}