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Commit c0dcdc75 authored by Bryan Huntsman's avatar Bryan Huntsman Committed by Junjie Wu
Browse files

qcom: core_ctl: Add support functions for core control 



Add support functions for core control driver. Also introduce
Kconfig for enabling core control.

Change-Id: Ic127b6ed7d9450338883b13d9c42abfe49ff8b35
Signed-off-by: default avatarBryan Huntsman <bryanh@codeaurora.org>
parent 2048a632

drivers/soc/qcom/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -541,4 +541,12 @@ config ICNSS 
	  control messages to FW over QMI channel. It is also responsible for

	  handling WLAN PD restart notifications.



config MSM_CORE_CTL_HELPER

	tristate "Core control helper functions for dynamically hotplug CPUs"

	help

	  Provide helper functions for core control driver. Core control

	  driver dynamically hotplugs CPUs from kernel based on current

	  system load and state. It also supports limiting min and

	  max online CPUs from userspace.



endif # ARCH_MSM

drivers/soc/qcom/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -56,6 +56,8 @@ obj-$(CONFIG_MSM_TZ_SMMU) += msm_tz_smmu.o 
obj-$(CONFIG_MSM_PIL)   +=      peripheral-loader.o

obj-$(CONFIG_MSM_PIL_SSR_GENERIC) += subsys-pil-tz.o

obj-$(CONFIG_MSM_PIL_MSS_QDSP6V5) += pil-q6v5.o pil-msa.o pil-q6v5-mss.o

obj-$(CONFIG_MSM_CORE_CTL_HELPER) += core_ctl_helper.o



ifdef CONFIG_MSM_SUBSYSTEM_RESTART

	obj-y += subsystem_notif.o

	obj-y += subsystem_restart.o

drivers/soc/qcom/core_ctl_helper.c

0 → 100644
+62 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2014, 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

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/cpu.h>

#include <linux/cpufreq.h>

#include <linux/ktime.h>

#include <linux/hrtimer.h>

#include <linux/module.h>

#include <linux/init.h>

#include <soc/qcom/core_ctl.h>



void core_ctl_block_hotplug(void)

{

	get_online_cpus();

}

EXPORT_SYMBOL(core_ctl_block_hotplug);



void core_ctl_unblock_hotplug(void)

{

	put_online_cpus();

}

EXPORT_SYMBOL(core_ctl_unblock_hotplug);



s64 core_ctl_get_time(void)

{

	return ktime_to_ms(ktime_get());

}

EXPORT_SYMBOL(core_ctl_get_time);



struct cpufreq_policy *core_ctl_get_policy(int cpu)

{

	return cpufreq_cpu_get(cpu);

}

EXPORT_SYMBOL(core_ctl_get_policy);



void core_ctl_put_policy(struct cpufreq_policy *policy)

{

	cpufreq_cpu_put(policy);

}

EXPORT_SYMBOL(core_ctl_put_policy);



struct device *core_ctl_find_cpu_device(unsigned cpu)

{

	return get_cpu_device(cpu);

}

EXPORT_SYMBOL(core_ctl_find_cpu_device);



int __ref core_ctl_online_core(unsigned int cpu)

{

	return cpu_up(cpu);

}

EXPORT_SYMBOL(core_ctl_online_core);

include/soc/qcom/core_ctl.h

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2014, 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

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#ifndef __SOC_QCOM_CORE_CTL_H

#define __SOC_QCOM_CORE_CTL_H



extern void core_ctl_block_hotplug(void);

extern void core_ctl_unblock_hotplug(void);

extern s64 core_ctl_get_time(void);

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);



#endif