[U-Boot] [PATCHv3] pca953x: support 16-pin devices

[Peter Tyser]

On Thu, 2010-12-09 at 22:11 +1300, Chris Packham wrote:
> 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.
> 
> Signed-off-by: Chris Packham <chris.packham at alliedtelesis.co.nz>

Looks good to me and works as advertised.

Acked-by: Peter Tyser <ptyser at xes-inc.com>
Tested-by: Peter Tyser <ptyser at xes-inc.com>