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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: Brian Bian <brian.bian@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Brian Bian 2017-08-09 11:45:40 -07:00 committed by Zhang Rui
parent 1820142f56
commit 38e44da591
2 changed files with 42 additions and 0 deletions
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41
drivers/thermal/int340x_thermal/int3400_thermal.c
View File

@ -16,6 +16,8 @@
#include <linux/thermal.h> #include <linux/thermal.h>
#include "acpi_thermal_rel.h" #include "acpi_thermal_rel.h"
#define INT3400_THERMAL_TABLE_CHANGED 0x83
enum int3400_thermal_uuid { enum int3400_thermal_uuid {
INT3400_THERMAL_PASSIVE_1, INT3400_THERMAL_PASSIVE_1,
INT3400_THERMAL_ACTIVE, INT3400_THERMAL_ACTIVE,
@ -185,6 +187,35 @@ static int int3400_thermal_run_osc(acpi_handle handle,
return result; 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, static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
int *temp) int *temp)
{ {
@ -290,6 +321,12 @@ static int int3400_thermal_probe(struct platform_device *pdev)
if (result) if (result)
goto free_zone; 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; return 0;
free_zone: free_zone:
@ -306,6 +343,10 @@ static int int3400_thermal_remove(struct platform_device *pdev)
{ {
struct int3400_thermal_priv *priv = platform_get_drvdata(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) if (!priv->rel_misc_dev_res)
acpi_thermal_rel_misc_device_remove(priv->adev->handle); acpi_thermal_rel_misc_device_remove(priv->adev->handle);

1
include/linux/thermal.h
View File

@ -102,6 +102,7 @@ enum thermal_notify_event {
THERMAL_DEVICE_DOWN, /* Thermal device is down */ THERMAL_DEVICE_DOWN, /* Thermal device is down */
THERMAL_DEVICE_UP, /* Thermal device is up after a down event */ THERMAL_DEVICE_UP, /* Thermal device is up after a down event */
THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */ THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */
THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */
}; };
struct thermal_zone_device_ops { struct thermal_zone_device_ops {