Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

Kernel driver lm70

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Supported chip:

  * National Semiconductor LM70

    Datasheet: http://www.national.com/pf/LM/LM70.html

Author:

        Kaiwan N Billimoria 

Description

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This driver implements support for the National Semiconductor LM70

temperature sensor.

The LM70 temperature sensor chip supports a single temperature sensor.

It communicates with a host processor (or microcontroller) via an

SPI/Microwire Bus interface.

Communication with the LM70 is simple: when the temperature is to be sensed,

the driver accesses the LM70 using SPI communication: 16 SCLK cycles

comprise the MOSI/MISO loop. At the end of the transfer, the 11-bit 2's

complement digital temperature (sent via the SIO line), is available in the

driver for interpretation. This driver makes use of the kernel's in-core

SPI support.

Thanks to

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Jean Delvare  for mentoring the hwmon-side driver

development.