linux-kernel - Re: [RFE PATCH 2/2] rtc, add write functionality to sysfs

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Message-Id: <B22B05C4-B8D2-44B9-971B-37913DE59EF6@towertech.it>
Date:	Sun, 24 Feb 2013 00:11:32 +0100
From:	Alessandro Zummo <a.zummo@...ertech.it>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Prarit Bhargava <prarit@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"x86@...nel.org" <x86@...nel.org>,
	Matt Fleming <matt.fleming@...el.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...ux.intel.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"rtc-linux@...glegroups.com" <rtc-linux@...glegroups.com>
Subject: Re: [RFE PATCH 2/2] rtc, add write functionality to sysfs

On 22/feb/2013, at 22:05, John Stultz <john.stultz@...aro.org> wrote:

> On 02/22/2013 12:55 PM, Prarit Bhargava wrote:
>> 
>> On 02/22/2013 03:43 PM, John Stultz wrote:
>>> On 02/14/2013 09:02 AM, Prarit Bhargava wrote:
>>>> /sys/class/rtc/rtcX/date and /sys/class/rtc/rtcX/time currently have
>>>> read-only access.  This patch introduces write functionality which will
>>>> set the rtc time.
>>>> 
>>>> Usage: echo YYYY-MM-DD > /sys/class/rtc/rtcX/date
>>>>         echo HH:MM:SS > /sys/class/rtc/rtcX/time
>>> Why do we want to add a new interface here?
>> John,
>> 
>> I'm not adding a new interface.  The current date/time interface only handles
>> read and I'm introducing write.
>> 
> 
> Right, but what benefit does that provide?
> (I'm not saying there isn't any, its just not clear from your patch why this is a good thing.)
> 
> Also CC'ing Alessandro for his input.

I'd like to keep the interfaces as simple as possible but I'm open to improvements if there are good use cases.


--
Best regards,
 Alessandro Zummo
    Tower Technologies--
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