This is a note to let you know that I've just added the patch titled
hwmon: (pmbus) Improve fan detection
to the 2.6.39-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-improve-fan-detection.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 81ae68142a0483b3791cba99eab268859858f508 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <[email protected]>
Date: Thu, 30 Jun 2011 06:54:05 -0700
Subject: hwmon: (pmbus) Improve fan detection
From: Guenter Roeck <[email protected]>
commit 81ae68142a0483b3791cba99eab268859858f508 upstream.
Some PMBus devices return no error when reading fan speed registers, but don't
really support fans. Strengthen fan detection by also checking if fan
configuration registers exist.
Signed-off-by: Guenter Roeck <[email protected]>
Reviewed-by: Robert Coulson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/hwmon/pmbus.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/hwmon/pmbus.c
+++ b/drivers/hwmon/pmbus.c
@@ -47,12 +47,14 @@ static void pmbus_find_sensor_groups(str
if (info->func[0]
&& pmbus_check_byte_register(client, 0, PMBUS_STATUS_INPUT))
info->func[0] |= PMBUS_HAVE_STATUS_INPUT;
- if (pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_1)) {
+ if (pmbus_check_byte_register(client, 0, PMBUS_FAN_CONFIG_12) &&
+ pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_1)) {
info->func[0] |= PMBUS_HAVE_FAN12;
if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_12))
info->func[0] |= PMBUS_HAVE_STATUS_FAN12;
}
- if (pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_3)) {
+ if (pmbus_check_byte_register(client, 0, PMBUS_FAN_CONFIG_34) &&
+ pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_3)) {
info->func[0] |= PMBUS_HAVE_FAN34;
if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_34))
info->func[0] |= PMBUS_HAVE_STATUS_FAN34;
Patches currently in stable-queue which might be from
[email protected] are
queue-2.6.39/hwmon-pmbus-improve-fan-detection.patch
queue-2.6.39/hwmon-pmbus-use-long-variables-for-register-to-data.patch
queue-2.6.39/hwmon-lm95241-fix-chip-detection-code.patch
queue-2.6.39/hwmon-pmbus-improve-auto-detection-of-temperature-status.patch
queue-2.6.39/hwmon-pmbus-drop-check-for-pmbus-revision-register-in.patch
queue-2.6.39/hwmon-pmbus-auto-detect-temp2-and-temp3.patch
queue-2.6.39/hwmon-lm95241-fix-negative-temperature-results.patch
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