linux-kernel - Re: [PATCH 1/3] Documentation: dt: keystone: provide SoC specific compatible flags

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Date:	Wed, 30 Sep 2015 10:31:48 -0400
From:	Murali Karicheri <m-karicheri2@...com>
To:	Nishanth Menon <nm@...com>,
	santosh shilimkar <santosh.shilimkar@...cle.com>,
	Santosh Shilimkar <ssantosh@...nel.org>
CC:	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/3] Documentation: dt: keystone: provide SoC specific
 compatible flags

On 09/25/2015 12:01 PM, Nishanth Menon wrote:
> On 09/25/2015 10:18 AM, santosh shilimkar wrote:
>> On 9/25/2015 7:50 AM, Nishanth Menon wrote:
> [...]
>>> But, how about userspace
>>> needing to know which SoC they are on, without needing to depend on
>>> board->soc mapping? How do we help resolve that?
Believe it or not, user space tools that are custom to a specific SoC 
would require such knowledge. So I agree on this front that a SoC 
specific compatibility is cool to have. I think that should have been 
clear in the commit description.

My Acked-By: Murali Karicheri <m-karicheri2@...com>

>>>
>> Why the user space should care about exact SOC ?
>
> examples vary - trivial one is: debug tools like omapconf[1] or testing
> tools like opentest[2] need some standard way to ensure Linux kernel is
> functional - trusting the least set of parameters is usually what we
> would prefer. while building a generic distro such as debian or yocto,
> one prefers NOT to need to do a package build per SoC/perboard - that
> never scales. instead, you'd like the same application run on different
> systems dynamically.
>
>
> [1] https://github.com/omapconf/omapconf
> [2] http://arago-project.org/wiki/index.php/Opentest
>


-- 
Murali Karicheri
Linux Kernel, Keystone
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