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authorBrian Bian <brian.bian@linux.intel.com>2017-08-09 21:45:40 +0300
committerZhang Rui <rui.zhang@intel.com>2017-08-11 05:51:22 +0300
commit38e44da591303d08b0d965a033e11ade284999d0 (patch)
treeacbe404ac3195ca0ebe892bd925299904b54df97 /drivers/thermal
parent1820142f562444f6f1291872b09fa5b84577c10f (diff)
downloadlinux-38e44da591303d08b0d965a033e11ade284999d0.tar.xz
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>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/int340x_thermal/int3400_thermal.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
index b2ffbed1229e..8ee38f55c7f3 100644
--- a/drivers/thermal/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
@@ -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);