From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F8B2C07E95 for ; Fri, 16 Jul 2021 07:03:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1CA47613E3 for ; Fri, 16 Jul 2021 07:03:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235110AbhGPHGg (ORCPT ); Fri, 16 Jul 2021 03:06:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235006AbhGPHGf (ORCPT ); Fri, 16 Jul 2021 03:06:35 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25D51C06175F for ; Fri, 16 Jul 2021 00:03:41 -0700 (PDT) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m4Hsk-0004iG-5F; Fri, 16 Jul 2021 09:03:34 +0200 Received: from pengutronix.de (unknown [IPv6:2a03:f580:87bc:d400:df95:c0e5:d620:3bac]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: mkl-all@blackshift.org) by smtp.blackshift.org (Postfix) with ESMTPSA id 84FE4650776; Fri, 16 Jul 2021 07:03:32 +0000 (UTC) Date: Fri, 16 Jul 2021 09:03:31 +0200 From: Marc Kleine-Budde To: Joakim Zhang Cc: Fabio Estevam , Rob Herring , Shawn Guo , Sascha Hauer , Sascha Hauer , dl-linux-imx , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Aisheng Dong Subject: Re: [PATCH] arm64: dts: imx8mp: remove fallback compatible string for FlexCAN Message-ID: <20210716070331.tqkqmxl6jqz2mxnj@pengutronix.de> References: <20210715114953.24393-1-qiangqing.zhang@nxp.com> <20210715121516.pjhbjhf6htds6n65@pengutronix.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="5ccb4n3zhmp4w52e" Content-Disposition: inline In-Reply-To: X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: devicetree@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org --5ccb4n3zhmp4w52e Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 16.07.2021 02:03:44, Joakim Zhang wrote: >>> "With "fsl,imx6q-flexcan" compatible string, i.MX8MP FlexCAN would >>> not work" >> >> Why? > I could explain more if I remember correctly, i.MX8MP with ECC added > and default is enabled, without FLEXCAN_QUIRK_DISABLE_MECR quirk, > FlexCAN doesn't work, it will put device in freeze mode. However, as > Mac described, i.MX6Q doesn't need it. The bits that are used in the FLEXCAN_QUIRK_DISABLE_MECR are marked as reserved on the imx6's flexcan IP core. Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | --5ccb4n3zhmp4w52e Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEK3kIWJt9yTYMP3ehqclaivrt76kFAmDxLz8ACgkQqclaivrt 76mNDQf+M0GyyDRyIavcEXKQdyqWcThvoV1bgiGFCqD8BWfEmQ+12C5P3UxLbm9g JwZRcQkgqQsTwZsrqLL35APMsc3TbM5oWbts8JpPzwq0dxM+H6t+oAvFe/pEZHJZ INjftbf2DBMeyKhxxn2KI8bH9/qsU4UtJvAcLtqUeRQO0RJmTBxfYbJedD8wniVT R2/BqPb6EyRFurmI7Kqcc81dYjP3Kzen4PC1HlcaB8+h2nsFbhM6t0GkC502P3bA kR0JN50pZ46QO2uSOsKMG9dPjezwwrYRCQMMo0eOb/odr7DtHL2a1+6L2tGAaqau 7Qpl6q/8JUJglLg+u4H4eg53yeLqpA== =wQ8R -----END PGP SIGNATURE----- --5ccb4n3zhmp4w52e--