[i2c] [RFC PATCH 3/8] Add PCA9536 4 bit I2C GPIO extender support to the pca9539 GPIO driver

[David Brownell]

On Thursday 31 January 2008, Guennadi Liakhovetski wrote:
> 
> > > > This should IMO list the '38 (8-bit) and '37 (4-bit) parts too.
> > > > Same register layout as the '36 (4-bit).  Otherwise the "x" seems
> > > > misleading...
> > > 
> > > Ok, I don't want to look through all datasheets ATM, so, I'll just trust 
> > > you, ok?
> > 
> > OK by me.  The NXP website makes them easy enough to find, but
> > it's another one of those sites that tries to be too clever by
> > overusing JavaScript.
> 
> I'm actually adding 9534 (8-bit) and 9535 (16-bit) too atm, if you don't 
> mind:-)

Do they have the same register interfaces?  I looked at them a long
time ago, and don't recall.  If they have the same interface, then
more power to you!