CVS commit: [thorpej-i2c-spi-conf] src/sys/dev/spi

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Wed May 19 12:35:28 UTC 2021

Modified Files:
        src/sys/dev/spi [thorpej-i2c-spi-conf]: mcp23s17.c

Log Message:
The MCP23S17 can multiplex multiple chips on the same chip select.
This driver has traditionally used cf_flags (from the kernel config
file) to get the chip address.

For direct configuration, we need to consult the platform device tree.
Add support for this, and implement for the Device Tree bindings for
this device (consulting the "microchip,spi-present-mask" property).

XXX The "microchip,spi-present-mask" property can encode for multiple
chips at the same device tree node; we do not currently support this
in the driver.


To generate a diff of this commit:
cvs rdiff -u -r1.2.2.2 -r1.2.2.3 src/sys/dev/spi/mcp23s17.c

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