linux-kernel - Re: [PATCH] gpiolib: let gpiochip_add_pin

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Date:	Tue, 20 Nov 2012 10:24:39 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Linus Walleij <linus.walleij@...ricsson.com>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Shiraz Hashim <shiraz.hashim@...com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Stephen Warren <swarren@...dia.com>,
	Anmar Oueja <anmar.oueja@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] gpiolib: let gpiochip_add_pin_range() specify offset

On 11/20/2012 04:45 AM, Linus Walleij wrote:
> From: Linus Walleij <linus.walleij@...aro.org>
> 
> Like with commit 3c739ad0df5eb41cd7adad879eda6aa09879eb76
> it is not always enough to specify all the pins of a gpio_chip
> from offset zero to be added to a pin map range, since the
> mapping from GPIO to pin controller may not be linear at all,
> but need to be broken into a few consecutive sub-ranges or
> 1-pin entries for complicated cases. The ranges may also be
> sparse.
> 
> This alters the signature of the function to accept offsets
> into both the GPIO-chip local pinspace and the pin controller
> local pinspace.

Reviewed-by: Stephen Warren <swarren@...dia.com>

Although perhaps rename the new "offset" parameter to "gpio_base" or
"gpio_offset", just like the existing "pin_base" rather than
pin/base/offset?
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