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Commit b874e742 authored by Ram Chandrasekar's avatar Ram Chandrasekar
Browse files

drivers: qti-virtual-sensor: Add virtual sensors for QTI chipsets 



Virtual sensors are required to define thermal zones to monitor GPU
and CPU Cluster temperatures, which has more than one sensors.

Add a Virtual sensor helper API for QTI chipset drivers to register
virtual thermal zones to estimate the max of all the CPU cluster and
GPU temperatures.

Change-Id: Ifa3a2f93be3128843704e9b6720edef3c6b3155b
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
parent 2f2b7464

drivers/thermal/qcom/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -30,3 +30,13 @@ config QTI_THERMAL_LIMITS_DCVS 
	  each cluster can be used to perform quick thermal mitigations by

	  tracking temperatures of the CPUs and taking thermal action in the

	  hardware without s/w intervention.



config QTI_VIRTUAL_SENSOR

	bool "QTI Virtual Sensor driver"

	depends on THERMAL_OF

	help

	  This driver has the information about the virtual sensors used by

	  QTI chipset's and registers the virtual sensors to a thermal zone.

	  The virtual sensor information includes the underlying thermal

	  sensors to query for temperature and the aggregation logic to

	  determine the virtual sensor temperature.

drivers/thermal/qcom/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -2,3 +2,4 @@ obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o 
qcom_tsens-y			+= tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-8996.o

obj-$(CONFIG_MSM_BCL_PERIPHERAL_CTL) += bcl_peripheral.o

obj-$(CONFIG_QTI_THERMAL_LIMITS_DCVS) += msm_lmh_dcvs.o

obj-$(CONFIG_QTI_VIRTUAL_SENSOR) += qti_virtual_sensor.o

drivers/thermal/qcom/qti_virtual_sensor.c

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+70 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2017, 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/thermal.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <linux/err.h>

#include <linux/platform_device.h>



#include "qti_virtual_sensor.h"



static const struct virtual_sensor_data qti_virtual_sensors[] = {

	{

		.virt_zone_name = "gpu-virt-max-step",

		.num_sensors = 2,

		.sensor_names = {"gpu0-usr",

				"gpu1-usr"},

		.logic = VIRT_MAXIMUM,

	},

	{

		.virt_zone_name = "silver-virt-max-usr",

		.num_sensors = 4,

		.sensor_names = {"cpu0-silver-usr",

				"cpu1-silver-usr",

				"cpu2-silver-usr",

				"cpu3-silver-usr"},

		.logic = VIRT_MAXIMUM,

	},

	{

		.virt_zone_name = "gold-virt-max-usr",

		.num_sensors = 4,

		.sensor_names = {"cpu0-gold-usr",

				"cpu1-gold-usr",

				"cpu2-gold-usr",

				"cpu3-gold-usr"},

		.logic = VIRT_MAXIMUM,

	},

};



int qti_virtual_sensor_register(struct device *dev)

{

	int sens_ct = 0;

	static int idx;

	struct thermal_zone_device *tz;



	sens_ct = ARRAY_SIZE(qti_virtual_sensors);

	for (; idx < sens_ct; idx++) {

		tz = devm_thermal_of_virtual_sensor_register(dev,

				&qti_virtual_sensors[idx]);

		if (IS_ERR(tz))

			dev_dbg(dev, "sensor:%d register error:%ld\n",

					idx, PTR_ERR(tz));

		else

			dev_dbg(dev, "sensor:%d registered\n", idx);

	}



	return 0;

}

EXPORT_SYMBOL(qti_virtual_sensor_register);

drivers/thermal/qcom/qti_virtual_sensor.h

0 → 100644
+29 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2017, 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 __QTI_VIRT_SENS_H__

#define __QTI_VIRT_SENS_H__



#ifdef CONFIG_QTI_VIRTUAL_SENSOR



int qti_virtual_sensor_register(struct device *dev);



#else



static inline int qti_virtual_sensor_register(struct device *dev)

{

	return -ENODEV;

}



#endif /* CONFIG_QTI_VIRTUAL_SENSOR */



#endif /* __QTI_VIRT_SENS_H__ */