Re: [PATCH 5.11 12/31] gpiolib: Read "gpio-line-names" from a firmware node

[Greg Kroah-Hartman]

On Fri, Mar 19, 2021 at 01:27:23PM +0100, Marek Vasut wrote:
> On 3/19/21 1:19 PM, Greg Kroah-Hartman wrote:
> > From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> > 
> > [ Upstream commit b41ba2ec54a70908067034f139aa23d0dd2985ce ]
> > 
> > On STM32MP1, the GPIO banks are subnodes of pin-controller@50002000,
> > see arch/arm/boot/dts/stm32mp151.dtsi. The driver for
> > pin-controller@50002000 is in drivers/pinctrl/stm32/pinctrl-stm32.c
> > and iterates over all of its DT subnodes when registering each GPIO
> > bank gpiochip. Each gpiochip has:
> > 
> >    - gpio_chip.parent = dev,
> >      where dev is the device node of the pin controller
> >    - gpio_chip.of_node = np,
> >      which is the OF node of the GPIO bank
> > 
> > Therefore, dev_fwnode(chip->parent) != of_fwnode_handle(chip.of_node),
> > i.e. pin-controller@50002000 != pin-controller@50002000/gpio@5000*000.
> > 
> > The original code behaved correctly, as it extracted the "gpio-line-names"
> > from of_fwnode_handle(chip.of_node) = pin-controller@50002000/gpio@5000*000.
> > 
> > To achieve the same behaviour, read property from the firmware node.
> 
> I think we agreed to drop this one for now before, see
> [PATCH 5.10 081/290] gpiolib: Read "gpio-line-names" from a firmware node
> Message-ID: <YFIo3A14Fb4Hty4O@xxxxxxxxx>

Sorry, now dropped.  Again.

greg k-h