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authorMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-04-17 11:46:29 +0200
committerGuenter Roeck <linux@roeck-us.net>2019-04-17 19:37:23 +0200
commit7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7 (patch)
tree9db30159bd32bec125c7d49e80a79bb7c4da0c8e /Documentation/hwmon/emc1403
parentdocs: hwmon: convert remaining files to ReST format (diff)
downloadlinux-7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7.tar.xz
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docs: hwmon: Add an index file and rename docs to *.rst
Now that all files were converted to ReST format, rename them and add an index. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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-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.