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qcom: core_ctl_helper: Add wrapper for CPU hotplug

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Different kernel version needs to use different kernel APIs for
hotplug. Add wrapper for CPU hotplug so that external module can be
used across different kernel releases.

Use device_online/offline() API for CPU hotplug.

Change-Id: Id21855f4ddc62bc9e9e6b45a856c245fd18d1514
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
This commit is contained in:
Junjie Wu 2015-11-17 11:36:00 -08:00 • committed by David Keitel
parent bcbb9ead97
commit f4c9a4a1f9
2 changed files with 20 additions and 3 deletions
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20
drivers/soc/qcom/core_ctl_helper.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -57,6 +57,22 @@ EXPORT_SYMBOL(core_ctl_find_cpu_device);
int __ref core_ctl_online_core(unsigned int cpu)
{
return cpu_up(cpu);
int ret;
lock_device_hotplug();
ret = device_online(get_cpu_device(cpu));
unlock_device_hotplug();
return ret;
}
EXPORT_SYMBOL(core_ctl_online_core);
int __ref core_ctl_offline_core(unsigned int cpu)
{
int ret;
lock_device_hotplug();
ret = device_offline(get_cpu_device(cpu));
unlock_device_hotplug();
return ret;
}
EXPORT_SYMBOL(core_ctl_offline_core);

3
include/soc/qcom/core_ctl.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -21,5 +21,6 @@ extern struct cpufreq_policy *core_ctl_get_policy(int cpu);
extern void core_ctl_put_policy(struct cpufreq_policy *policy);
extern struct device *core_ctl_find_cpu_device(unsigned cpu);
extern int core_ctl_online_core(unsigned int cpu);
extern int core_ctl_offline_core(unsigned int cpu);
#endif