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Commit 38e44da5 authored by Brian Bian's avatar Brian Bian Committed by Zhang Rui
Browse files

thermal: int3400_thermal: process "thermal table changed" event 



Some BIOS implement ACPI notification code 0x83 to indicate active
relationship table(ART) and/or thermal relationship table(TRT) changes
to INT3400 device. This event needs to be propagated to user space so
that it can be handled by the user space thermal daemon.

Signed-off-by: default avatarBrian Bian <brian.bian@linux.intel.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent 1820142f

drivers/thermal/int340x_thermal/int3400_thermal.c

+41 −0
Original line number Diff line number Diff line
@@ -16,6 +16,8 @@ 
#include <linux/thermal.h>

#include "acpi_thermal_rel.h"



#define INT3400_THERMAL_TABLE_CHANGED 0x83



enum int3400_thermal_uuid {

	INT3400_THERMAL_PASSIVE_1,

	INT3400_THERMAL_ACTIVE,
@@ -185,6 +187,35 @@ static int int3400_thermal_run_osc(acpi_handle handle, 
	return result;

}



static void int3400_notify(acpi_handle handle,

			u32 event,

			void *data)

{

	struct int3400_thermal_priv *priv = data;

	char *thermal_prop[5];



	if (!priv)

		return;



	switch (event) {

	case INT3400_THERMAL_TABLE_CHANGED:

		thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s",

				priv->thermal->type);

		thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d",

				priv->thermal->temperature);

		thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");

		thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d",

				THERMAL_TABLE_CHANGED);

		thermal_prop[4] = NULL;

		kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE,

				thermal_prop);

		break;

	default:

		dev_err(&priv->adev->dev, "Unsupported event [0x%x]\n", event);

		break;

	}

}



static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,

			int *temp)

{
@@ -290,6 +321,12 @@ static int int3400_thermal_probe(struct platform_device *pdev) 
	if (result)

		goto free_zone;



	result = acpi_install_notify_handler(

			priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify,

			(void *)priv);

	if (result)

		goto free_zone;



	return 0;



free_zone:
@@ -306,6 +343,10 @@ static int int3400_thermal_remove(struct platform_device *pdev) 
{

	struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);



	acpi_remove_notify_handler(

			priv->adev->handle, ACPI_DEVICE_NOTIFY,

			int3400_notify);



	if (!priv->rel_misc_dev_res)

		acpi_thermal_rel_misc_device_remove(priv->adev->handle);

include/linux/thermal.h

+1 −0
Original line number Diff line number Diff line
@@ -102,6 +102,7 @@ enum thermal_notify_event { 
	THERMAL_DEVICE_DOWN, /* Thermal device is down */

	THERMAL_DEVICE_UP, /* Thermal device is up after a down event */

	THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */

	THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */

};



struct thermal_zone_device_ops {