linux-kernel - Re: [PATCH 3/5] gpio: make gpiochip_get

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Message-ID: <20140722201740.GA11459@roeck-us.net>
Date:	Tue, 22 Jul 2014 13:17:40 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Alexandre Courbot <acourbot@...dia.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	gnurou@...il.com
Subject: Re: [PATCH 3/5] gpio: make gpiochip_get_desc() gpiolib-private

On Tue, Jul 22, 2014 at 04:17:41PM +0900, Alexandre Courbot wrote:
> As GPIO descriptors are not going to remain unique anymore, having this
> function public is not safe. Restrain its use to gpiolib since we have
> no user outside of it.
> 
If I implement a gpio chip driver built as module, and I want to use
gpiochip_request_own_desc(), how am I supposed to get desc ?

I understand that there is still gpio_to_desc(), but I would have thought
that
	desc = gpiochip_get_desc(chip, pin);
would be better than
	desc = gpio_to_desc(chip->base + pin);

Not that it makes much of a difference for me, just asking.

Thanks,
Guenter
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