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    SubjectRe: [PATCH 3/4] of/gpio: Implement GPIOLIB notifier hooks
    On Tue, Feb 09, 2010 at 10:13:11AM -0700, Grant Likely wrote:
    > > +static int __init of_gpio_notifier_init(void)
    > > +{
    > > +       return blocking_notifier_chain_register(&gpio_notifier, &of_gpio_nb);
    > > +}
    > > +arch_initcall(of_gpio_notifier_init);
    > Another concern; if any gpio chips get registered before this
    > arch_initcall (not sure if it is possible or not), then those chips
    > won't get registered with the of gpio infrastructure.

    Technically, it is possible, but registering usual GPIO controllers
    in arch_initcall feels not quite right approach in the first place
    (and, btw, it won't work most of the time, because even early drivers
    do not register itself earlier than subsys_initcall).

    And arch gpio controllers (like QE GPIO) are usually device-less,
    and they use of_mm_gpiochip_add(), so we fully control them.

    Plus I don't see any reason why we couldn't move
    of_gpio_notifier_init() into, say, postcore_initcall, if we ever
    need it.


    Anton Vorontsov
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