Patch "hwmon: (pmbus/ltc2978) Fix temperature reporting" has been added to the 3.4-stable tree

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This is a note to let you know that I've just added the patch titled

    hwmon: (pmbus/ltc2978) Fix temperature reporting

to the 3.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     hwmon-pmbus-ltc2978-fix-temperature-reporting.patch
and it can be found in the queue-3.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 8c958c703ef8804093437959221951eaf0e1e664 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Date: Thu, 21 Feb 2013 10:27:54 -0800
Subject: hwmon: (pmbus/ltc2978) Fix temperature reporting

From: Guenter Roeck <linux@xxxxxxxxxxxx>

commit 8c958c703ef8804093437959221951eaf0e1e664 upstream.

On LTC2978, only READ_TEMPERATURE is supported. It reports
the internal junction temperature. This register is unpaged.

On LTC3880, READ_TEMPERATURE and READ_TEMPERATURE2 are supported.
READ_TEMPERATURE is paged and reports external temperatures.
READ_TEMPERATURE2 is unpaged and reports the internal junction
temperature.

Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Acked-by: Jean Delvare <khali@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/hwmon/pmbus/ltc2978.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -59,7 +59,7 @@ enum chips { ltc2978, ltc3880 };
 struct ltc2978_data {
 	enum chips id;
 	int vin_min, vin_max;
-	int temp_min, temp_max;
+	int temp_min, temp_max[2];
 	int vout_min[8], vout_max[8];
 	int iout_max[2];
 	int temp2_max;
@@ -113,9 +113,10 @@ static int ltc2978_read_word_data_common
 		ret = pmbus_read_word_data(client, page,
 					   LTC2978_MFR_TEMPERATURE_PEAK);
 		if (ret >= 0) {
-			if (lin11_to_val(ret) > lin11_to_val(data->temp_max))
-				data->temp_max = ret;
-			ret = data->temp_max;
+			if (lin11_to_val(ret)
+			    > lin11_to_val(data->temp_max[page]))
+				data->temp_max[page] = ret;
+			ret = data->temp_max[page];
 		}
 		break;
 	case PMBUS_VIRT_RESET_VOUT_HISTORY:
@@ -266,7 +267,7 @@ static int ltc2978_write_word_data(struc
 		break;
 	case PMBUS_VIRT_RESET_TEMP_HISTORY:
 		data->temp_min = 0x7bff;
-		data->temp_max = 0x7c00;
+		data->temp_max[page] = 0x7c00;
 		ret = ltc2978_clear_peaks(client, page, data->id);
 		break;
 	default:
@@ -323,7 +324,8 @@ static int ltc2978_probe(struct i2c_clie
 	data->vin_min = 0x7bff;
 	data->vin_max = 0x7c00;
 	data->temp_min = 0x7bff;
-	data->temp_max = 0x7c00;
+	for (i = 0; i < ARRAY_SIZE(data->temp_max); i++)
+		data->temp_max[i] = 0x7c00;
 	data->temp2_max = 0x7c00;
 
 	switch (data->id) {


Patches currently in stable-queue which might be from linux@xxxxxxxxxxxx are

queue-3.4/hwmon-pmbus-ltc2978-fix-temperature-reporting.patch
queue-3.4/hwmon-lineage-pem-add-missing-terminating-entry-for-pem__attributes.patch
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