[PATCH] ARM: pxa: remove devicetree boards from pxa_defconfig

[robert.jarzmik@free.fr (Robert Jarzmik)]

Robert Jarzmik <robert.jarzmik@free.fr> writes:

> If both legacy and device-tree machines are mixed in the same defconfig,
> the legacy boards don't boot up anymore with gpio request deferral
> errors.
>
> This is seen when attempting to run akita, borzoi, spitz, terrier, or
> tosa in qemu with pxa_defconfig.
>
> The real reason behind is that gpio handling for pxa in its current
> state cannot be built for _both_ a devicetree machine (ie. pxa-dt.c) and
> a non devicetree machine (ie. corgi, tosa, ...).
>
> This is turn is because for devicetree a pinctrl is enforced for the
> machine, and a pinctrl driver is required. If it's not available,
> pxa_gpio_request() fails on pinctrl_request_gpio() and returns
> -EPROBE_DEFER.  It was introduced by commit f806dac5938b
> ("ARM: pxa: activate pinctrl for device-tree machines").
>
> Now the true chicken and egg problem is than machine files,
> ie. arch/arm/mach-pxa/xxx.c are using gpio before the drivers are
> probed, in the init_machine() function, and that's why pinctrl/gpio for
> legacy machine files is a bit difficult.
>
> As for now, to keep the compilation coverage and testing of legacy
> machines, this patch removes the 2 devicetree machines from
> pxa_defconfig.
>
> Reported-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
> Tested-by: Guenter Roeck <linux@roeck-us.net>
Applied to pxa/for-next, with a huge delay.

Cheers.

--
Robert