Hi Michael,
-----Original Message----- From: Michael Walle michael@walle.cc Sent: Wednesday, November 17, 2021 1:23 PM To: Sahil Malhotra (OSS) sahil.malhotra@oss.nxp.com Cc: Clément Faure clement.faure@nxp.com; Gaurav Jain gaurav.jain@nxp.com; Pankaj Gupta pankaj.gupta@nxp.com; Priyanka Jain priyanka.jain@nxp.com; Sahil Malhotra sahil.malhotra@nxp.com; u-boot@lists.denx.de; Varun Sethi V.Sethi@nxp.com; Ye Li ye.li@nxp.com; Michael Walle michael@walle.cc Subject: Re: [PATCH 1/2] fsl-layerscape: add dtb overlay feature
From: Sahil Malhotra sahil.malhotra@nxp.com
This patch enables the DTB overlay feature for LS platforms.
Could you please add some description what this is doing and for what this is intended? To have a "DTB overlay feature", it is enough to just enable CONFIG_OF_LIBFDT_OVERLAY.
I will add some description, and yes for DTB overlay feature, it is enough to enable CONFIG_OF_LIBFDT_OVERLAY but we need to do this step before booting the kernel that's why also have to enable CONFIG_OF_SYSTEM_SETUP.
Apparently you're adding an overlay passed by optee. Doesn't this have to be applied to u-boot's control dtb too?
Yes, we will be applying the overlay passed by optee, yes it will be applied to dtb which will be passed to uboot for kernel booting.
-michael
Regards, Sahil Malhotra