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    SubjectRe: [PATCH 2/4] of/gpio: Add support for two-stage registration for the of_gpio_chips
    On Monday 25 January 2010, Anton Vorontsov wrote:
    > With this patch there are two ways to register OF GPIO controllers:
    > 1. Allocating the of_gpio_chip structure and passing the
    >    &of_gc->gc pointer to the gpiochip_add. (Can use container_of
    >    to convert the gpio_chip to the of_gpio_chip.)
    > 2. Allocating and registering the gpio_chip structure separately
    >    from the of_gpio_chip. (Since two allocations are separate,
    >    container_of won't work.)
    > As time goes by we'll kill the first option.

    Why have two options, instead of just the first/simpler one??

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