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Wed, 17 Nov 2021 18:11:11 +0000 From: "Sahil Malhotra (OSS)" To: Michael Walle , "Sahil Malhotra (OSS)" CC: =?iso-8859-1?Q?Cl=E9ment_Faure?= , Gaurav Jain , Pankaj Gupta , Priyanka Jain , "u-boot@lists.denx.de" , Varun Sethi , Ye Li Subject: RE: [PATCH 1/2] fsl-layerscape: add dtb overlay feature Thread-Topic: [PATCH 1/2] fsl-layerscape: add dtb overlay feature Thread-Index: AQHX296AIK9RIL8SjkaxNUu0RKXmFw== Date: Wed, 17 Nov 2021 18:11:11 +0000 Message-ID: References: <20211117062347.24517-1-sahil.malhotra@oss.nxp.com> <20211117075314.3606691-1-michael@walle.cc> In-Reply-To: <20211117075314.3606691-1-michael@walle.cc> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=oss.nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 9894fb90-4520-4ba6-5998-08d9a9f5a2e8 x-ms-traffictypediagnostic: DBBPR04MB7531: x-ms-exchange-sharedmailbox-routingagent-processed: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:2657; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DB7PR04MB5322.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9894fb90-4520-4ba6-5998-08d9a9f5a2e8 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Nov 2021 18:11:11.3394 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 3XzEeoMmA+PpAMX/VBP7rdLv1Yz44ycfkd4StltlQsIgzZJiASIussrFP6+T5ziTVfV/uDEKFWPztLoHPuIDSQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBBPR04MB7531 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.35 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean Hi Michael, -----Original Message----- From: Michael Walle =20 Sent: Wednesday, November 17, 2021 1:23 PM To: Sahil Malhotra (OSS) Cc: Cl=E9ment Faure ; Gaurav Jain ; Pankaj Gupta ; Priyanka Jain ; Sahil Malhotra ; u-boot@lists.denx.de; Varun = Sethi ; Ye Li ; Michael Walle Subject: Re: [PATCH 1/2] fsl-layerscape: add dtb overlay feature > From: Sahil Malhotra >=20 > This patch enables the DTB overlay feature for LS platforms. > Could you please add some description what this is doing and for what thi= s 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 booti= ng 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 applie= d to dtb which will be passed to uboot for kernel booting. -michael Regards, Sahil Malhotra