Re: [PATCH] gpio: change member .dev to .parent

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Nov 04, 2015 at 10:31:15AM +0100, Linus Walleij wrote:
> The name .dev in a struct is normally reserved for a struct device
> that is let us say a superclass to the thing described by the struct.
> struct gpio_chip stands out by confusingly using a struct device *dev
> to point to the parent device (such as a platform_device) that
> represents the hardware. As we want to give gpio_chip:s real devices,
> this is not working. We need to rename this member to parent.
> 
> This was done by two coccinelle scripts, I guess it is possible to
> combine them into one, but I don't know such stuff. They look like
> this:
> 
> @@
> struct gpio_chip *var;
> @@
> -var->dev
> +var->parent
> 
> and:
> 
> @@
> struct gpio_chip var;
> @@
> -var.dev
> +var.parent
> 
> This patch hits all over the place, but I *strongly* prefer this
> solution to any piecemal approaches that just exercise patch
> mechanics all over the place. It mainly hits drivers/gpio and
> drivers/pinctrl which is my own backyard anyway.
> 
> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
> Cc: Rafał Miłecki <zajec5@gmail.com>
> Cc: Jiri Kosina <jikos@kernel.org>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: Richard Purdie <rpurdie@rpsys.net>
> Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Alek Du <alek.du@intel.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jaroslav Kysela <perex@perex.cz>
> Cc: Takashi Iwai <tiwai@suse.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Other subsystem maintainers: please ACK this. I want to merge this
> big patch in the beginning of -rc1. I can create an immutable branch
> or tag if you think it will cause you problems, so you can pull it
> in.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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