Merge tag 'hwmon-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:

 - Add driver for Intersil ISL68137 PWM Controller

 - Add driver for Lochnagar 2

 - Add driver for Infineon IR38064 Voltage Regulator

 - Add support for TMP75B to lm75 driver

 - Convert documentation to ReST format

 - Use request_muxed_region for Super-IO accesses in several drivers

 - Add 'samples' attribute to ABI, and start using it

 - Add support for custom sysfs attributes to pmbus drivers (used in
   ISL68137 driver)

 - Introduce HWMON_CHANNEL_INFO macro

 - Automated changes:
      - Use permission specific [SENSOR_][DEVICE_]ATTR variants
      - Fix build warnings due to unused of_device_id structures
      - Use HWMON_CHANNEL_INFO macro

 - Various minor improvements and fixes

* tag 'hwmon-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (125 commits)
  hwmon: (lm75) Add support for TMP75B
  dt-bindings: hwmon: Add tmp75b to lm75.txt
  hwmon: (s3c) Use dev_get_drvdata()
  hwmon: (max6650) Drop call to thermal_cdev_update
  docs: hwmon: remove the extension from .rst files
  docs: hwmon: convert three docs to ReST format
  hwmon: (max6650) add thermal cooling device capability
  hwmon: (ina3221) Add voltage conversion time settings
  hwmon: (ina3221) Do not read-back to cache reg_config
  docs: hwmon: Add an index file and rename docs to *.rst
  docs: hwmon: convert remaining files to ReST format
  docs: hwmon: misc files: convert to ReST format
  docs: hwmon: pmbus files: convert to ReST format
  docs: hwmon: k8temp, w83793: convert to ReST format
  docs: hwmon: da9052, da9055: convert to ReST format
  docs: hwmon: wm831x, wm8350: convert to ReST format
  docs: hwmon: dme1737, vt1211: convert to ReST format
  docs: hwmon: ads1015: convert to ReST format
  docs: hwmon: asc7621: convert to ReST format
  docs: hwmon: ibmpowernv: convert to ReST format
  ...

1 files changed, 80 insertions, 0 deletions

diff --git a/Documentation/hwmon/emc1403.rst b/Documentation/hwmon/emc1403.rst
new file mode 100644
index 000000000000..3a4913b63ef3
--- /dev/null
+++ b/Documentation/hwmon/emc1403.rst
@@ -0,0 +1,80 @@
+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.