arm_big_little cpufreq driver is only used for ARM bigLITTLE platforms and hence
must be dependent on CONFIG_BIG_LITTLE.
This was highlighted by Russell earlier when he reported this issue:
drivers/built-in.o: In function `bL_cpufreq_set_rate':
powercap_sys.c:(.text+0x5ed9a0): undefined reference to `bL_switch_request_cb'
Reported-by: Russell King <linux(a)arm.linux.org.uk>
Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org>
---
drivers/cpufreq/Kconfig.arm | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 456ba5e..3275e9c 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -4,7 +4,7 @@
config ARM_BIG_LITTLE_CPUFREQ
tristate "Generic ARM big LITTLE CPUfreq driver"
- depends on ARM && ARM_CPU_TOPOLOGY && HAVE_CLK
+ depends on ARM && BIG_LITTLE && ARM_CPU_TOPOLOGY && HAVE_CLK
select PM_OPP
help
This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
--
1.7.12.rc2.18.g61b472e
This introduces another routine cpufreq_notify_post_transition() which can be
used to send POSTCHANGE notification for new freq with or without both
{PRE|POST}CHANGE notifications for last freq. This is useful at multiple places,
specially for sending transition failure notifications.
Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org>
---
V1->V2:
- Not required to push it for 3.13 anymore and can go in 3.14.
- Rebased over following patchset as there were conflicts in unicore2 driver if
following patchset is applied first (which should be the case):
https://lkml.org/lkml/2013/10/30/553 (create cpufreq_generic_get() routine)
drivers/cpufreq/cpufreq.c | 14 ++++++++++++++
include/linux/cpufreq.h | 2 ++
2 files changed, 16 insertions(+)
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 5e27def..3b877d4 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -338,6 +338,20 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_notify_transition);
+/* Do post notifications when there are chances that transition has failed */
+void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
+ struct cpufreq_freqs *freqs, int transition_failed)
+{
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+ if (!transition_failed)
+ return;
+
+ swap(freqs->old, freqs->new);
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+}
+EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition);
+
/*********************************************************************
* SYSFS INTERFACE *
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 276e646..b26bfab 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -316,6 +316,8 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
void cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs, unsigned int state);
+void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
+ struct cpufreq_freqs *freqs, int transition_failed);
#else /* CONFIG_CPU_FREQ */
static inline int cpufreq_register_notifier(struct notifier_block *nb,
--
1.7.12.rc2.18.g61b472e