linux-kernel - Re: Question on adding a firmware ihex file in the kernel source

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Message-ID: <55D64D94.70408@broadcom.com>
Date:	Thu, 20 Aug 2015 23:58:44 +0200
From:	Arend van Spriel <arend@...adcom.com>
To:	Murali Karicheri <m-karicheri2@...com>,
	<linux-kernel@...r.kernel.org>, <linux-firmware@...nel.org>
Subject: Re: Question on adding a firmware ihex file in the kernel source

On 08/20/2015 11:46 PM, Murali Karicheri wrote:
> All,
>
> Please help me understand the procedure to add a firmware ihex file to
> kernel source tree under firmware/ folder. The README.AddingFirmware
> file explains that file should be added to
> git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git and
> the patch for the same to be send to linux-firmware@...nel.org. And this
> requires it to be in binary form. How does then that end up in the
> firmware/ folder of the Linux source tree as an ihex file? I would like
> to have one of the  firmware statically built into the kernel as it is
> needed to be loaded even before file system is initialized in kernel
> (network driver firmware). Some other firmwares are to be used from the
> filesystem. Both would make use of the request_firmare() interface.
> Please help me understand the procedure.

Your firmware does not need to end up in the firmware/ folder of the 
Linux source tree. That folder is more or less obsolete. If you want 
firmware to be built into the kernel, you have to specify it in Kconfig. 
Look for EXTRA_FIRMWARE. The help text is a good read.

Regards,
Arend

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