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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 95976C48BE5 for ; Wed, 16 Jun 2021 19:33:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6857360FF1 for ; Wed, 16 Jun 2021 19:33:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232851AbhFPTfY (ORCPT ); Wed, 16 Jun 2021 15:35:24 -0400 Received: from vps0.lunn.ch ([185.16.172.187]:41128 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231202AbhFPTfX (ORCPT ); Wed, 16 Jun 2021 15:35:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Disposition:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:From:Sender:Reply-To:Subject: Date:Message-ID:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Content-Disposition:In-Reply-To:References; bh=B6ZGTUD6NsGZsGjjROclmcpOgiH6NhjYtXWhNJYTkbE=; b=QPZQQr2XubOmMa8kdNrJ2g03Fk c1tpYiyI3kJqik4ho4L0iWog+kjlzAZCsGQfVRFocACDbUNdsu59uFLXGOBoGlDO5D75974f1bTcK E9ETSVvQyRDG1uux/RhrkMXhxC6m13wpBcUsyjdzGWfEg4h+74oAULJ/z+ges+l6V9dA=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1ltbHm-009ljo-67; Wed, 16 Jun 2021 21:33:14 +0200 Date: Wed, 16 Jun 2021 21:33:14 +0200 From: Andrew Lunn To: Marcin Wojtas Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org, linux@armlinux.org.uk, jaz@semihalf.com, gjb@semihalf.com, upstream@semihalf.com, Samer.El-Haj-Mahmoud@arm.com, jon@solid-run.com, tn@semihalf.com, rjw@rjwysocki.net, lenb@kernel.org Subject: Re: [net-next: PATCH v2 2/7] net: mdiobus: Introduce fwnode_mdbiobus_register() Message-ID: References: <20210616190759.2832033-1-mw@semihalf.com> <20210616190759.2832033-3-mw@semihalf.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210616190759.2832033-3-mw@semihalf.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 16, 2021 at 09:07:54PM +0200, Marcin Wojtas wrote: > This patch introduces a new helper function that > wraps acpi_/of_ mdiobus_register() and allows its > usage via common fwnode_ interface. > > Fall back to raw mdiobus_register() in case CONFIG_FWNODE_MDIO > is not enabled, in order to satisfy compatibility > in all future user drivers. > Signed-off-by: Marcin Wojtas > --- > include/linux/fwnode_mdio.h | 12 +++++++++++ > drivers/net/mdio/fwnode_mdio.c | 22 ++++++++++++++++++++ > 2 files changed, 34 insertions(+) > > diff --git a/include/linux/fwnode_mdio.h b/include/linux/fwnode_mdio.h > index faf603c48c86..13d4ae8fee0a 100644 > --- a/include/linux/fwnode_mdio.h > +++ b/include/linux/fwnode_mdio.h > @@ -16,6 +16,7 @@ int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, > int fwnode_mdiobus_register_phy(struct mii_bus *bus, > struct fwnode_handle *child, u32 addr); > > +int fwnode_mdiobus_register(struct mii_bus *bus, struct fwnode_handle *fwnode); > #else /* CONFIG_FWNODE_MDIO */ > int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, > struct phy_device *phy, > @@ -30,6 +31,17 @@ static inline int fwnode_mdiobus_register_phy(struct mii_bus *bus, > { > return -EINVAL; > } > + > +static inline int fwnode_mdiobus_register(struct mii_bus *bus, > + struct fwnode_handle *fwnode) > +{ > + /* > + * Fall back to mdiobus_register() function to register a bus. > + * This way, we don't have to keep compat bits around in drivers. > + */ > + > + return mdiobus_register(mdio); > +} I'm not sure this fallback is correct. Any driver which decides to use fwmode is going to select it. If it is not selected, you want a link time error, or a compiler time error to tell you, you are missing FWNODE_MDIO. Calling mdiobus_register() is unlikely to work, or the driver would of done that directly. Andrew