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authorViresh Kumar <viresh.kumar@linaro.org>2013-08-14 19:38:24 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-31 00:11:08 +0100
commitd4019f0a92ab802f385cc9c8ad3ab7b5449712cb (patch)
treeebd06695585e457ae1bf219653452b111e7508db /drivers/cpufreq/arm_big_little.c
parent7dbf694db6ac7c759599316d50d7050efcbd512a (diff)
downloadleg-kernel-d4019f0a92ab802f385cc9c8ad3ab7b5449712cb.tar.gz
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/arm_big_little.c')
-rw-r--r--drivers/cpufreq/arm_big_little.c24
1 files changed, 5 insertions, 19 deletions
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index 71f1af93b585..5519933813ea 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -192,39 +192,25 @@ bL_cpufreq_set_rate(u32 cpu, u32 old_cluster, u32 new_cluster, u32 rate)
static int bL_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
{
- struct cpufreq_freqs freqs;
u32 cpu = policy->cpu, cur_cluster, new_cluster, actual_cluster;
- int ret = 0;
+ unsigned int freqs_new;
cur_cluster = cpu_to_cluster(cpu);
new_cluster = actual_cluster = per_cpu(physical_cluster, cpu);
- freqs.old = bL_cpufreq_get_rate(cpu);
- freqs.new = freq_table[cur_cluster][index].frequency;
-
- pr_debug("%s: cpu: %d, cluster: %d, oldfreq: %d, target freq: %d, new freq: %d\n",
- __func__, cpu, cur_cluster, freqs.old, freqs.new,
- freqs.new);
+ freqs_new = freq_table[cur_cluster][index].frequency;
if (is_bL_switching_enabled()) {
if ((actual_cluster == A15_CLUSTER) &&
- (freqs.new < clk_big_min)) {
+ (freqs_new < clk_big_min)) {
new_cluster = A7_CLUSTER;
} else if ((actual_cluster == A7_CLUSTER) &&
- (freqs.new > clk_little_max)) {
+ (freqs_new > clk_little_max)) {
new_cluster = A15_CLUSTER;
}
}
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- ret = bL_cpufreq_set_rate(cpu, actual_cluster, new_cluster, freqs.new);
- if (ret)
- freqs.new = freqs.old;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- return ret;
+ return bL_cpufreq_set_rate(cpu, actual_cluster, new_cluster, freqs_new);
}
static inline u32 get_table_count(struct cpufreq_frequency_table *table)