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| author | Radu Sabau <radu.sabau@analog.com> | 2024-05-31 11:46:44 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2024-06-03 20:26:31 -0700 |
| commit | 5124d9acf3af50bcc6d0958db4fecb3c2f13f8ed (patch) | |
| tree | 7274a80af4a20ab0a17bef9d3b2f80020f36266f /Documentation/hwmon | |
| parent | fcbb583f33af99e260aca2b5893b21ccf1021285 (diff) | |
| download | lwn-5124d9acf3af50bcc6d0958db4fecb3c2f13f8ed.tar.gz lwn-5124d9acf3af50bcc6d0958db4fecb3c2f13f8ed.zip | |
hwmon: (max31827) Add PEC support
Add PEC support using the hwmon core infrastructure.
Signed-off-by: Radu Sabau <radu.sabau@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240531084645.12935-2-radu.sabau@analog.com
[groeck: Adjusted subject; simplified description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/max31827.rst | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/hwmon/max31827.rst b/Documentation/hwmon/max31827.rst index 44ab9dc064cb..9c11a9518c67 100644 --- a/Documentation/hwmon/max31827.rst +++ b/Documentation/hwmon/max31827.rst @@ -131,7 +131,14 @@ The Fault Queue bits select how many consecutive temperature faults must occur before overtemperature or undertemperature faults are indicated in the corresponding status bits. -Notes ------ +PEC Support +----------- + +When reading a register value, the PEC byte is computed and sent by the chip. + +PEC on word data transaction respresents a signifcant increase in bandwitdh +usage (+33% for both write and reads) in normal conditions. -PEC is not implemented. +Since this operation implies there will be an extra delay to each +transaction, PEC can be disabled or enabled through sysfs. +Just write 1 to the "pec" file for enabling PEC and 0 for disabling it. |