5 * National Semiconductor LM70
6 Datasheet: http://www.national.com/pf/LM/LM70.html
9 Kaiwan N Billimoria <kaiwan@designergraphix.com>
14 This driver implements support for the National Semiconductor LM70
17 The LM70 temperature sensor chip supports a single temperature sensor.
18 It communicates with a host processor (or microcontroller) via an
19 SPI/Microwire Bus interface.
21 Communication with the LM70 is simple: when the temperature is to be sensed,
22 the driver accesses the LM70 using SPI communication: 16 SCLK cycles
23 comprise the MOSI/MISO loop. At the end of the transfer, the 11-bit 2's
24 complement digital temperature (sent via the SIO line), is available in the
25 driver for interpretation. This driver makes use of the kernel's in-core
28 As a real (in-tree) example of this "SPI protocol driver" interfacing
29 with a "SPI master controller driver", see drivers/spi/spi_lm70llp.c
30 and its associated documentation.
34 Jean Delvare <khali@linux-fr.org> for mentoring the hwmon-side driver