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Diffstat (limited to 'Documentation/hwmon/lm90')
| -rw-r--r-- | Documentation/hwmon/lm90 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90 index 08106ad7089c..6a03dd4bcc94 100644 --- a/Documentation/hwmon/lm90 +++ b/Documentation/hwmon/lm90 @@ -173,6 +173,18 @@ The lm90 driver will not update its values more frequently than every other second; reading them more often will do no harm, but will return 'old' values. +SMBus Alert Support +------------------- + +This driver has basic support for SMBus alert. When an alert is received, +the status register is read and the faulty temperature channel is logged. + +The Analog Devices chips (ADM1032 and ADT7461) do not implement the SMBus +alert protocol properly so additional care is needed: the ALERT output is +disabled when an alert is received, and is re-enabled only when the alarm +is gone. Otherwise the chip would block alerts from other chips in the bus +as long as the alarm is active. + PEC Support ----------- |