From: Zhang, Rui <rui.zhang@intel.com>
Date: Wed, 27 Feb 2008 23:51:30 +0000 (+0800)
Subject: ACPI: thermal: show temperature in millidegree Celsius
X-Git-Tag: v2.6.25-rc6~19^2~3^2
X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=5e012760dfd5ec24c41b9eab9e654a88360bb026

ACPI: thermal: show temperature in millidegree Celsius

as now required by the generic thermal I/F

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 8d4b79b4f933..c4e00ac8ea85 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -879,6 +879,8 @@ static void acpi_thermal_check(void *data)
 }
 
 /* sys I/F for generic thermal sysfs support */
+#define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
+
 static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
 {
 	struct acpi_thermal *tz = thermal->devdata;
@@ -886,7 +888,7 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
 	if (!tz)
 		return -EINVAL;
 
-	return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(tz->temperature));
+	return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature));
 }
 
 static const char enabled[] = "kernel";
@@ -980,21 +982,21 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
 
 	if (tz->trips.critical.flags.valid) {
 		if (!trip)
-			return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+			return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
 				tz->trips.critical.temperature));
 		trip--;
 	}
 
 	if (tz->trips.hot.flags.valid) {
 		if (!trip)
-			return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+			return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
 					tz->trips.hot.temperature));
 		trip--;
 	}
 
 	if (tz->trips.passive.flags.valid) {
 		if (!trip)
-			return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+			return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
 					tz->trips.passive.temperature));
 		trip--;
 	}
@@ -1002,7 +1004,7 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
 		tz->trips.active[i].flags.valid; i++) {
 		if (!trip)
-			return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+			return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
 					tz->trips.active[i].temperature));
 		trip--;
 	}