pca953x: support 16-pin devices
authorChris Packham <judge.packham@gmail.com>
Sun, 19 Dec 2010 10:12:13 +0000 (10:12 +0000)
committerHeiko Schocher <hs@denx.de>
Mon, 10 Jan 2011 06:53:00 +0000 (07:53 +0100)
commit5dec49ca2273bcf181071bc1c97a9901b155ebc1
tree2b00e45e8f268dcd9b872525591d8460d434462f
parent89c95f0cd3f8140f3b8a82a22a6a144c148d09c6
pca953x: support 16-pin devices

This adds support for for the PCA9535/PCA9539 family of gpio devices which
have 16 output pins.

To let the driver know which devices are 16-pin it is necessary to define
CONFIG_SYS_I2C_PCA953X_WIDTH in your board config file. This is used to
create an array of {chip, ngpio} tuples that are used to determine the
width of a particular chip. For backwards compatibility it is assumed that
any chip not defined in CONFIG_SYS_I2C_PCA953X_WIDTH has 8 pins.

Acked-by: Peter Tyser <ptyser@xes-inc.com>
Tested-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
README
drivers/gpio/pca953x.c