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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0F5CC433EF for ; Sat, 8 Jan 2022 19:51:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232582AbiAHTv4 (ORCPT ); Sat, 8 Jan 2022 14:51:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232473AbiAHTv4 (ORCPT ); Sat, 8 Jan 2022 14:51:56 -0500 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 E9E6BC06173F for ; Sat, 8 Jan 2022 11:51:55 -0800 (PST) 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 1n6Hkl-0002oh-UT; Sat, 08 Jan 2022 20:51:51 +0100 Received: from pengutronix.de (2a03-f580-87bc-d400-6624-65e0-1d16-9a67.ip6.dokom21.de [IPv6:2a03:f580:87bc:d400:6624:65e0:1d16:9a67]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) 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 578946D39A3; Sat, 8 Jan 2022 19:51:49 +0000 (UTC) Date: Sat, 8 Jan 2022 20:51:48 +0100 From: Marc Kleine-Budde To: Dario Binacchi Cc: linux-can@vger.kernel.org Subject: Re: [PATCH v3 7/7] docs: networking: device drivers: can: add flexcan Message-ID: <20220108195148.auem62moegm5rnn7@pengutronix.de> References: <20220107193105.1699523-1-mkl@pengutronix.de> <20220107193105.1699523-8-mkl@pengutronix.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="eev4pt67pr4g6247" 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: linux-can@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org --eev4pt67pr4g6247 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 08.01.2022 14:12:27, Dario Binacchi wrote: > > +On/off RTR frames reception > > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D > > + > > +For most flexcan IP cores the driver supports 2 RX modes: > > + > > +- FIFO > > +- mailbox > > + > > +The older flexcan cores (integrated into the i.MX25, i.MX28, i.MX35 > > +and i.MX53 SOCs) only reception of RTR frames if the controller is > > +configured for RX-FIFO mode. >=20 > only receive RTR frames >=20 > > + > > +The RX FIFO mode uses a hardware FIFO with a depth of 6 CAN frames, > > +while the mailbox mode uses a software FIFO with a depth of up to 62 > > +CAN frames. With the help of the bigger buffer, the mailbox mode > > +performs better under high system load situations. > > + > > +As reception of RTR frames is part of the CAN standard, all flexcan > > +core come up in a mode where RTR reception is possible. >=20 > all flexcan cores Fixed both. Thanks, 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 | --eev4pt67pr4g6247 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEK3kIWJt9yTYMP3ehqclaivrt76kFAmHZ61EACgkQqclaivrt 76loXwgAk5sA69UM4KWOXN64fa4uwlAuoI8LhJXjl5uSOtKUIzkQo/jIxcibF+cX 97c99Y1CNXYmoF7gxpwCFsr+nreRcUZdOHWZyYlmfktg9I+kIYd9pdGgLUtayXin 8yMlYVaQTkvcN2Uz8bfLTTJVuW15xL4PIVEWsXavyMEzgYtSGuOHTKSD0XkeZnRm qwaL5OMLYlHA9ieZS2D8QZ9+Gnd/U1rfq7PVBGkuTcqSPngGfqylSjqHRmMJ3JCx BWV9yT4vzuofWJGgwyyOoDpbaxhnEki+SPsrJOMg4l7XbA4qBksdpYxRvXOCD4ZO XA+F8p84xAbvi42GwrnXxkPBExhtog== =HBiE -----END PGP SIGNATURE----- --eev4pt67pr4g6247--