Messages in this thread |  | | | From | David Brownell <> | | Subject | Re: [PATCH 2/4] of/gpio: Add support for two-stage registration for the of_gpio_chips | | Date | Mon, 25 Jan 2010 22:36:15 -0800 |
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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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