linux-kernel - Re: Using firmware interface to write configuration blob to MMR space

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Message-ID: <55DDCDCC.2070600@ti.com>
Date:	Wed, 26 Aug 2015 10:31:40 -0400
From:	Murali Karicheri <m-karicheri2@...com>
To:	Ben Hutchings <ben@...adent.org.uk>, <linux-firmware@...nel.org>
CC:	"Kwok, WingMan" <w-kwok2@...com>, <linux-kernel@...r.kernel.org>
Subject: Re: Using firmware interface to write configuration blob to MMR space

On 08/25/2015 06:57 PM, Ben Hutchings wrote:
> On Tue, 2015-08-25 at 16:12 -0400, Murali Karicheri wrote:
>> On 08/25/2015 02:52 PM, Murali Karicheri wrote:
>>> All,
>>>
>>> One of our SoC integrates a hardware block from a hardware vendor. The
>>> vendor has provided a configuration blob that is used to customize the
>>> hardware block for a specific application. This configuration blob is to
>>> be written to the MMR space to customize the hardware. The vendor is not
>>> willing to provide details of the registers. So I am wondering if I
>>> could use the firmware API (request_firmware) to copy the blob to the
>>> kernel space so that driver could write these values to the MMR space.
>>> Is this an acceptable way of using the firmware interface? My research
>>> so far doesn't see the interface used this way and looking for your
>>> expert opinion.
>
> I think this would be an entirely reasonable use of request_firmware().
>
> Ben.
>
Ben,

Thanks for your quick response. Ok, we will use request_firmware() in 
this case.

Thanks
-- 
Murali Karicheri
Linux Kernel, Keystone
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