1 files changed, 90 insertions, 0 deletions

diff --git a/drivers/thermal/int340x_thermal/processor_thermal_device.c b/drivers/thermal/int340x_thermal/processor_thermal_device.c
index 0fe5dbbea968..7c3848da2df0 100644
--- a/drivers/thermal/int340x_thermal/processor_thermal_device.c
+++ b/drivers/thermal/int340x_thermal/processor_thermal_device.c
@@ -18,6 +18,8 @@
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
+#include <linux/thermal.h>
+#include "int340x_thermal_zone.h"
 
 /* Broadwell-U/HSB thermal reporting device */
 #define PCI_DEVICE_ID_PROC_BDW_THERMAL	0x1603
@@ -39,6 +41,7 @@ struct proc_thermal_device {
 	struct device *dev;
 	struct acpi_device *adev;
 	struct power_config power_limits[2];
+	struct int34x_thermal_zone *int340x_zone;
 };
 
 enum proc_thermal_emum_mode_type {
@@ -117,6 +120,72 @@ static struct attribute_group power_limit_attribute_group = {
 	.name = "power_limits"
 };
 
+static int stored_tjmax; /* since it is fixed, we can have local storage */
+
+static int get_tjmax(void)
+{
+	u32 eax, edx;
+	u32 val;
+	int err;
+
+	err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
+	if (err)
+		return err;
+
+	val = (eax >> 16) & 0xff;
+	if (val)
+		return val;
+
+	return -EINVAL;
+}
+
+static int read_temp_msr(unsigned long *temp)
+{
+	int cpu;
+	u32 eax, edx;
+	int err;
+	unsigned long curr_temp_off = 0;
+
+	*temp = 0;
+
+	for_each_online_cpu(cpu) {
+		err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
+					&edx);
+		if (err)
+			goto err_ret;
+		else {
+			if (eax & 0x80000000) {
+				curr_temp_off = (eax >> 16) & 0x7f;
+				if (!*temp || curr_temp_off < *temp)
+					*temp = curr_temp_off;
+			} else {
+				err = -EINVAL;
+				goto err_ret;
+			}
+		}
+	}
+
+	return 0;
+err_ret:
+	return err;
+}
+
+static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
+					 unsigned long *temp)
+{
+	int ret;
+
+	ret = read_temp_msr(temp);
+	if (!ret)
+		*temp = (stored_tjmax - *temp) * 1000;
+
+	return ret;
+}
+
+static struct thermal_zone_device_ops proc_thermal_local_ops = {
+	.get_temp       = proc_thermal_get_zone_temp,
+};
+
 static int proc_thermal_add(struct device *dev,
 			    struct proc_thermal_device **priv)
 {
@@ -126,6 +195,8 @@ static int proc_thermal_add(struct device *dev,
 	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
 	union acpi_object *elements, *ppcc;
 	union acpi_object *p;
+	unsigned long long tmp;
+	struct thermal_zone_device_ops *ops = NULL;
 	int i;
 	int ret;
 
@@ -178,6 +249,24 @@ static int proc_thermal_add(struct device *dev,
 
 	ret = sysfs_create_group(&dev->kobj,
 				 &power_limit_attribute_group);
+	if (ret)
+		goto free_buffer;
+
+	status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
+	if (ACPI_FAILURE(status)) {
+		/* there is no _TMP method, add local method */
+		stored_tjmax = get_tjmax();
+		if (stored_tjmax > 0)
+			ops = &proc_thermal_local_ops;
+	}
+
+	proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
+	if (IS_ERR(proc_priv->int340x_zone)) {
+		sysfs_remove_group(&proc_priv->dev->kobj,
+			   &power_limit_attribute_group);
+		ret = PTR_ERR(proc_priv->int340x_zone);
+	} else
+		ret = 0;
 
 free_buffer:
 	kfree(buf.pointer);
@@ -187,6 +276,7 @@ free_buffer:
 
 void proc_thermal_remove(struct proc_thermal_device *proc_priv)
 {
+	int340x_thermal_zone_remove(proc_priv->int340x_zone);
 	sysfs_remove_group(&proc_priv->dev->kobj,
 			   &power_limit_attribute_group);
 }