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Diffstat (limited to 'Documentation/hwmon/emc1403')
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diff --git a/Documentation/hwmon/emc1403 b/Documentation/hwmon/emc1403 deleted file mode 100644 index a869b0ef6a9d..000000000000 --- a/Documentation/hwmon/emc1403 +++ /dev/null @@ -1,59 +0,0 @@ -Kernel driver emc1403 -===================== - -Supported chips: - * SMSC / Microchip EMC1402, EMC1412 - Addresses scanned: I2C 0x18, 0x1c, 0x29, 0x4c, 0x4d, 0x5c - Prefix: 'emc1402' - Datasheets: - http://ww1.microchip.com/downloads/en/DeviceDoc/1412.pdf - http://ww1.microchip.com/downloads/en/DeviceDoc/1402.pdf - * SMSC / Microchip EMC1403, EMC1404, EMC1413, EMC1414 - Addresses scanned: I2C 0x18, 0x29, 0x4c, 0x4d - Prefix: 'emc1403', 'emc1404' - Datasheets: - http://ww1.microchip.com/downloads/en/DeviceDoc/1403_1404.pdf - http://ww1.microchip.com/downloads/en/DeviceDoc/1413_1414.pdf - * SMSC / Microchip EMC1422 - Addresses scanned: I2C 0x4c - Prefix: 'emc1422' - Datasheet: - http://ww1.microchip.com/downloads/en/DeviceDoc/1422.pdf - * SMSC / Microchip EMC1423, EMC1424 - Addresses scanned: I2C 0x4c - Prefix: 'emc1423', 'emc1424' - Datasheet: - http://ww1.microchip.com/downloads/en/DeviceDoc/1423_1424.pdf - -Author: - Kalhan Trisal <kalhan.trisal@intel.com - - -Description ------------ - -The Standard Microsystems Corporation (SMSC) / Microchip EMC14xx chips -contain up to four temperature sensors. EMC14x2 support two sensors -(one internal, one external). EMC14x3 support three sensors (one internal, -two external), and EMC14x4 support four sensors (one internal, three -external). - -The chips implement three limits for each sensor: low (tempX_min), high -(tempX_max) and critical (tempX_crit.) The chips also implement an -hysteresis mechanism which applies to all limits. The relative difference -is stored in a single register on the chip, which means that the relative -difference between the limit and its hysteresis is always the same for -all three limits. - -This implementation detail implies the following: -* When setting a limit, its hysteresis will automatically follow, the - difference staying unchanged. For example, if the old critical limit - was 80 degrees C, and the hysteresis was 75 degrees C, and you change - the critical limit to 90 degrees C, then the hysteresis will - automatically change to 85 degrees C. -* The hysteresis values can't be set independently. We decided to make - only temp1_crit_hyst writable, while all other hysteresis attributes - are read-only. Setting temp1_crit_hyst writes the difference between - temp1_crit_hyst and temp1_crit into the chip, and the same relative - hysteresis applies automatically to all other limits. -* The limits should be set before the hysteresis. |