linux-kernel - Re: [PATCH] ACPI / GPIO: Pass index to acpi_get_gpiod_by

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Date:	Wed, 29 Oct 2014 16:41:47 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Arnd Bergmann <arnd@...db.de>
CC:	Darren Hart <dvhart@...ux.intel.com>, <linux-acpi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI / GPIO: Pass index to acpi_get_gpiod_by_index()
 when using properties

On 10/29/2014 06:59 AM, Rafael J. Wysocki wrote:
> On Tuesday, October 28, 2014 01:15:27 PM Mika Westerberg wrote:
>> acpi_dev_add_driver_gpios() makes it possible to set up mapping between
>> properties and ACPI GpioIo resources in a driver, so we can take index
>> parameter in acpi_find_gpio() into use with _DSD device properties now.
>>
>> This index can be used to select a GPIO from a property with multiple
>> GPIOs:
>>
>>    Package () {
>>    	"data-gpios",
>>    	Package () {
>>    		\_SB.GPIO, 0, 0, 0,
>>    		\_SB.GPIO, 1, 0, 0,
>>    		\_SB.GPIO, 2, 0, 1,
>>    	}
>>    }
>>
>> In order to retrieve the last GPIO from a driver we can simply do:
>>
>>    desc = devm_gpiod_get_index(dev, "data", 2);
>>
>> and so on.
>>
>> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
>
> Cool. :-)
>
> Any objections anyone?

Looks good to me!

Acked-by: Alexandre Courbot <acourbot@...dia.com>

Since this looks like a bug fix, shouldn't this be squashed into the 
relevant patch of the device-properties set?
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