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diff --git a/Documentation/hwmon/ntc_thermistor b/Documentation/hwmon/ntc_thermistor deleted file mode 100644 index 8b9ff23edc32..000000000000 --- a/Documentation/hwmon/ntc_thermistor +++ /dev/null @@ -1,100 +0,0 @@ -Kernel driver ntc_thermistor -================= - -Supported thermistors from Murata: -* Murata NTC Thermistors NCP15WB473, NCP18WB473, NCP21WB473, NCP03WB473, - NCP15WL333, NCP03WF104, NCP15XH103 - Prefixes: 'ncp15wb473', 'ncp18wb473', 'ncp21wb473', 'ncp03wb473', - 'ncp15wl333', 'ncp03wf104', 'ncp15xh103' - Datasheet: Publicly available at Murata - -Supported thermistors from EPCOS: -* EPCOS NTC Thermistors B57330V2103 - Prefixes: b57330v2103 - Datasheet: Publicly available at EPCOS - -Other NTC thermistors can be supported simply by adding compensation -tables; e.g., NCP15WL333 support is added by the table ncpXXwl333. - -Authors: - MyungJoo Ham <myungjoo.ham@samsung.com> - -Description ------------ - -The NTC (Negative Temperature Coefficient) thermistor is a simple thermistor -that requires users to provide the resistance and lookup the corresponding -compensation table to get the temperature input. - -The NTC driver provides lookup tables with a linear approximation function -and four circuit models with an option not to use any of the four models. - -The four circuit models provided are: - - $: resister, [TH]: the thermistor - - 1. connect = NTC_CONNECTED_POSITIVE, pullup_ohm > 0 - - [pullup_uV] - | | - [TH] $ (pullup_ohm) - | | - +----+-----------------------[read_uV] - | - $ (pulldown_ohm) - | - --- (ground) - - 2. connect = NTC_CONNECTED_POSITIVE, pullup_ohm = 0 (not-connected) - - [pullup_uV] - | - [TH] - | - +----------------------------[read_uV] - | - $ (pulldown_ohm) - | - --- (ground) - - 3. connect = NTC_CONNECTED_GROUND, pulldown_ohm > 0 - - [pullup_uV] - | - $ (pullup_ohm) - | - +----+-----------------------[read_uV] - | | - [TH] $ (pulldown_ohm) - | | - -------- (ground) - - 4. connect = NTC_CONNECTED_GROUND, pulldown_ohm = 0 (not-connected) - - [pullup_uV] - | - $ (pullup_ohm) - | - +----------------------------[read_uV] - | - [TH] - | - --- (ground) - -When one of the four circuit models is used, read_uV, pullup_uV, pullup_ohm, -pulldown_ohm, and connect should be provided. When none of the four models -are suitable or the user can get the resistance directly, the user should -provide read_ohm and _not_ provide the others. - -Sysfs Interface ---------------- -name the mandatory global attribute, the thermistor name. - -temp1_type always 4 (thermistor) - RO - -temp1_input measure the temperature and provide the measured value. - (reading this file initiates the reading procedure.) - RO - -Note that each NTC thermistor has only _one_ thermistor; thus, only temp1 exists. |