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Mon, 5 Nov 2018 13:57:01 -0500 Received: from metis.ext.pengutronix.de ([85.220.165.71]:33895 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726125AbeKES5A (ORCPT ); Mon, 5 Nov 2018 13:57:00 -0500 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 (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gJbKb-00010q-Qr; Mon, 05 Nov 2018 10:38:01 +0100 Received: from [IPv6:2001:67c:670:202:c591:f55c:bb67:31f5] (unknown [IPv6:2001:67c:670:202:c591:f55c:bb67:31f5]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (Client CN "mkl@blackshift.org", Issuer "StartCom Class 1 Client CA" (not verified)) (Authenticated sender: mkl@blackshift.org) by smtp.blackshift.org (Postfix) with ESMTPSA id 81BCF384E90; Mon, 5 Nov 2018 09:37:59 +0000 (UTC) To: Faiz Abbas , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-can@vger.kernel.org Cc: wg@grandegger.com, robh+dt@kernel.org, mark.rutland@arm.com, kishon@ti.com References: <20181102192616.28291-1-faiz_abbas@ti.com> <20181102192616.28291-2-faiz_abbas@ti.com> <5e1a0b67-510a-5512-d477-0b363e4733fe@pengutronix.de> From: Marc Kleine-Budde Openpgp: preference=signencrypt Autocrypt: addr=mkl@pengutronix.de; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="6AARXZWAuJ8EhVUM6hntMrHvTaIVOZrPu" 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-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --6AARXZWAuJ8EhVUM6hntMrHvTaIVOZrPu Content-Type: multipart/mixed; boundary="a6ssr4tU7M1AjNaXKpOf9FyUhJjakeWFP"; protected-headers="v1" From: Marc Kleine-Budde To: Faiz Abbas , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-can@vger.kernel.org Cc: wg@grandegger.com, robh+dt@kernel.org, mark.rutland@arm.com, kishon@ti.com Message-ID: <0c0885c4-f5ae-a29c-7176-f67fe546cfd8@pengutronix.de> Subject: Re: [PATCH 1/6] phy: Add max_bitrate attribute & phy_get_max_bitrate() References: <20181102192616.28291-1-faiz_abbas@ti.com> <20181102192616.28291-2-faiz_abbas@ti.com> <5e1a0b67-510a-5512-d477-0b363e4733fe@pengutronix.de> In-Reply-To: --a6ssr4tU7M1AjNaXKpOf9FyUhJjakeWFP Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: quoted-printable On 11/05/2018 07:27 AM, Faiz Abbas wrote: > I remove the transceiver child node binding documentation in patch 5/6.= >=20 > The existing implementation is pretty limiting as it just has a child > node with no associated device. What if a transceiver requires its own > configurations before it can start sending/receiving messages (for > example, my usecase requires it to pull the standby line low)? >=20 > I think that can be solved by implementing the transceiver as a phy and= > exposing a generic get_max_bitrate API. That way, the transceiver devic= e > can do all its startup configuration in the phy probe function. >=20 > In any case, do suggest if you have a better idea on how to implement > pull gpio low requirement. As long as we don't have any proper transceiver/phy driver, that does more than swtich on/off a GPIO, please add a "xceiver" regulator to your driver. Look for: > devm_regulator_get(&pdev->dev, "xceiver"); in the flexcan driver. Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de | --a6ssr4tU7M1AjNaXKpOf9FyUhJjakeWFP-- --6AARXZWAuJ8EhVUM6hntMrHvTaIVOZrPu Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEENrCndlB/VnAEWuH5k9IU1zQoZfEFAlvgD3QACgkQk9IU1zQo ZfFSzwf+ORdSazr3ZdB5Ij/Ju2/oA2lKRHQoR/eKydjg7k/xtO4pHcV/91BB3OAf iJLYQ06kq5uO98L9qnzcArdEi6xG7JEH4sSQwBMdIksMEw29nsXhPgmB/oXoLQr9 /x/U8gbQSjw6MmY0EOLD1qG7lVM6vFPTbo12VpcPQ3rkvoi4PGxG9Ef92lMe+GvX VT3vEWXHgub0B6kirdKVuJzta+p8HmK9qPz8FRBfttq7umIr99jFDiQvf1FoixAP okGrmB+0IiousOMtPKAhI4O/YRizXaeWgJzp5ZAqM7R2/2THLRFy3qyt3CLPdGag jPtqKS8D2rvQ4NUCzcm7idxIjKThnQ== =tWLD -----END PGP SIGNATURE----- --6AARXZWAuJ8EhVUM6hntMrHvTaIVOZrPu--