CVS commit: src/sys/dev/spi

["Radoslaw Kujawa" <rkujawa%netbsd.org@localhost>]

Module Name:    src
Committed By:   rkujawa
Date:           Tue Feb 25 20:09:37 UTC 2014

Modified Files:
        src/sys/dev/spi: files.spi
Added Files:
        src/sys/dev/spi: mcp48x1.c

Log Message:
Add preliminary driver for Microchip MCP48x1 family of DACs.

Needs more testing and an appropriate API for such (non-audio) DACs. For now
one can set the output value using sysctl node. Also sysmon(4) will conveniently
report the voltage on Vout pin of the DAC. Note that this is not an actual
measured voltage, but merely calculated using equation from datasheet. Real
voltage might be different and depend on analog circuitry attached to the DAC.


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/dev/spi/files.spi
cvs rdiff -u -r0 -r1.1 src/sys/dev/spi/mcp48x1.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.