On Wed 2017-08-02 13:57:29, Cédric Le Goater wrote:
> On 08/02/2017 01:33 PM, Pavel Machek wrote:
> > Hi!
> >
> >> The PCA955x family of chips are I2C LED blinkers whose pins not used
> >> to control LEDs can be used as general purpose I/Os (GPIOs).
> >>
> >> The following adds support for device tree and Open Firmware to be
> >> able do define different operation modes for each pin. See bindings
> >> documentation for more details. The pca955x driver is then extended
> >> with a gpio_chip when pins are operating in GPIO mode.
> >>
> >> The driver follows the scheme of the leds-pca9532 driver which behaves
> >> quite similarly.
> >
> > Is there reason not to treat pca955x chip as a GPIO extender, and then
> > use leds-gpio on top?
>
> I would say mostly because there is already a leds-pca955x driver and
> that the primary nature of the chip is being a LED blinker. It also
> supports different blinking rates.
Ok, I guess gpio-led driver can not to blinking, so this makes sense.
Pavel
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