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OpenCloudOS-Kernel/Documentation/devicetree/bindings/hwmon/ntc_thermistor.txt

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hwmon: (ntc_thermistor) Add DT with IIO support to NTC thermistor driver This patch adds DT support to NTC driver to parse the platform data. Also adds the support to work as an iio device client. During the probe ntc driver gets the respective channels of ADC and uses iio_raw_read calls to get the ADC converted value. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> [Guenter Roeck: fixed Kconfig dependencies; use ERR_CAST] Tested-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-13 12:08:20 +08:00
NTC Thermistor hwmon sensors
-------------------------------
Requires node properties:
- "compatible" value : one of
hwmon: (ntc_thermistor) Support B57330V2103 from EPCOS This patch adds support for the ntc thermistor B57330V2103 from EPCOS. Signed-off-by: Johannes Pointner <johannes.pointner@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-07-01 14:05:52 +08:00
"epcos,b57330v2103"
hwmon: (ntc_thermistor) Use the manufacturer name properly Murata Manufacturing Co., Ltd is the vendor for NTC (Negative Temperature coefficient) based Thermistors. But, the driver extensively uses "NTC" as the vendor name. This patch corrects the vendor name also updates the compatibility strings according to the vendor-prefix.txt Note: Drivers continue to support the previous compatible strings but further addition of these compatible strings in device tree is deprecated. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-06-25 14:29:31 +08:00
"murata,ncp15wb473"
"murata,ncp18wb473"
"murata,ncp21wb473"
"murata,ncp03wb473"
"murata,ncp15wl333"
/* Usage of vendor name "ntc" is deprecated */
<DEPRECATED> "ntc,ncp15wb473"
<DEPRECATED> "ntc,ncp18wb473"
<DEPRECATED> "ntc,ncp21wb473"
<DEPRECATED> "ntc,ncp03wb473"
<DEPRECATED> "ntc,ncp15wl333"
hwmon: (ntc_thermistor) Add DT with IIO support to NTC thermistor driver This patch adds DT support to NTC driver to parse the platform data. Also adds the support to work as an iio device client. During the probe ntc driver gets the respective channels of ADC and uses iio_raw_read calls to get the ADC converted value. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> [Guenter Roeck: fixed Kconfig dependencies; use ERR_CAST] Tested-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-13 12:08:20 +08:00
- "pullup-uv" Pull up voltage in micro volts
- "pullup-ohm" Pull up resistor value in ohms
- "pulldown-ohm" Pull down resistor value in ohms
- "connected-positive" Always ON, If not specified.
Status change is possible.
- "io-channels" Channel node of ADC to be used for
conversion.
hwmon: (ntc_thermistor) Add ntc thermistor to thermal subsystem as a sensor. To get more comprehensive and integrated thermal management, it adds ntc thermistor to thermal framework as a thermal sensor. It's governed thermal susbsystem only if it is described in DT node. Otherwise, it just notifies temperature to userspace via sysfs as it used to be. Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-09-17 13:54:37 +08:00
Optional node properties:
- "#thermal-sensor-cells" Used to expose itself to thermal fw.
hwmon: (ntc_thermistor) Add DT with IIO support to NTC thermistor driver This patch adds DT support to NTC driver to parse the platform data. Also adds the support to work as an iio device client. During the probe ntc driver gets the respective channels of ADC and uses iio_raw_read calls to get the ADC converted value. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> [Guenter Roeck: fixed Kconfig dependencies; use ERR_CAST] Tested-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-13 12:08:20 +08:00
Read more about iio bindings at
Documentation/devicetree/bindings/iio/iio-bindings.txt
Example:
ncp15wb473@0 {
hwmon: (ntc_thermistor) Use the manufacturer name properly Murata Manufacturing Co., Ltd is the vendor for NTC (Negative Temperature coefficient) based Thermistors. But, the driver extensively uses "NTC" as the vendor name. This patch corrects the vendor name also updates the compatibility strings according to the vendor-prefix.txt Note: Drivers continue to support the previous compatible strings but further addition of these compatible strings in device tree is deprecated. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-06-25 14:29:31 +08:00
compatible = "murata,ncp15wb473";
hwmon: (ntc_thermistor) Add DT with IIO support to NTC thermistor driver This patch adds DT support to NTC driver to parse the platform data. Also adds the support to work as an iio device client. During the probe ntc driver gets the respective channels of ADC and uses iio_raw_read calls to get the ADC converted value. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> [Guenter Roeck: fixed Kconfig dependencies; use ERR_CAST] Tested-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-13 12:08:20 +08:00
pullup-uv = <1800000>;
pullup-ohm = <47000>;
pulldown-ohm = <0>;
io-channels = <&adc 3>;
};