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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BC944C25B75 for ; Mon, 3 Jun 2024 13:42:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bwRQ3UD9mIXgFNzYBUG7zCm7/pI8yNGRifxwqoY7RQw=; b=bKRNnvnlHJzPTH GLNVJuYEZ+ASPYtwFkLGbMauWyrlB5mIuL7Mye8RSKHviHdFiQAP638/j6BFOFTxpLHDmyskaWgdv SA1agfHODFJaN3vN2+YiNBt2tUUyK2FtrSpAs8/LaSeDX77uW8Whg1yX5stL7gNLxYVbv8opoctrz i6rSMFTRrwr9lVkYGtTwM9cUmlNOWOuey7hR/285WalRV4y0lr9/dE89J2yLEn5Uw0Y2RR4PdYwB5 gAy0oboaaAZ6nwJHvzD5En1hxoGUPDHkqlv1BGimK+1xj6PNDw1TaVtB/DLamuZZlKDYjbiBX50Sw Bxj65a0SK9z43AJLZTDw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sE7wo-0000000GxEy-0UO6; Mon, 03 Jun 2024 13:42:02 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sE7wk-0000000GxBr-0Vmm; Mon, 03 Jun 2024 13:41:59 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=M5ah77INyaKh5P58D9AxRt+KkH3818+oFIrbjxKeZn4=; b=HQNIuOPpNyUPOdCjHpx4IOa0dA 1d1T3e6XNFKcNIxNLB1yd+IcAdrHeeja7KY6gJQ8l7EnkmT8TkcE9fRwvoZiKrE4UuKeIbXS+p1Pz hIqFe9H/0nX7W2GCfUdm2Kj8nfTTCEL5bkiwai7t1IBmiyMRVfN4c/Gn+p+NAp6YMPrzOhP5Pm4/3 yte5ny25yih4EIAs2voq8DE2Gft6jYXx5j1s90s5LHVA0s4t0yptm2gA2ZiR883rRPOuUzK6K6qE5 iDr0MVNU3OSf0zG9M9/YIIIHxz6Y/jDLlcpKPwEgFuEAlfHJ8ylbsk5n9oMsIIBzwYU5aAvNZ/6Wn GlQqp5Wg==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:52728) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sE7wW-0002oi-0I; Mon, 03 Jun 2024 14:41:44 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1sE7wW-0000UV-T1; Mon, 03 Jun 2024 14:41:44 +0100 Date: Mon, 3 Jun 2024 14:41:44 +0100 From: "Russell King (Oracle)" To: Daniel Golle Cc: Sky Huang , Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Qingfang Deng , Matthias Brugger , AngeloGioacchino Del Regno , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Steven Liu Subject: Re: [PATCH net-next v6 5/5] net: phy: add driver for built-in 2.5G ethernet PHY on MT7988 Message-ID: References: <20240603121834.27433-1-SkyLake.Huang@mediatek.com> <20240603121834.27433-6-SkyLake.Huang@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240603_064158_187714_1C52062C X-CRM114-Status: GOOD ( 21.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jun 03, 2024 at 02:31:46PM +0100, Daniel Golle wrote: > On Mon, Jun 03, 2024 at 02:25:01PM +0100, Russell King (Oracle) wrote: > > On Mon, Jun 03, 2024 at 08:18:34PM +0800, Sky Huang wrote: > > > Add support for internal 2.5Gphy on MT7988. This driver will load > > > necessary firmware, add appropriate time delay and figure out LED. > > > Also, certain control registers will be set to fix link-up issues. > > > > Based on our previous discussion, it may be worth checking in the > > .config_init() method whether phydev->interface is one of the > > PHY interface modes that this PHY supports. As I understand from one > > of your previous emails, the possibilities are XGMII, USXGMII or > > INTERNAL. Thus: > > > > > +static int mt798x_2p5ge_phy_config_init(struct phy_device *phydev) > > > +{ > > > + struct pinctrl *pinctrl; > > > + int ret; > > > > /* Check that the PHY interface type is compatible */ > > if (phydev->interface != PHY_INTERFACE_MODE_INTERNAL && > > phydev->interface != PHY_INTERFACE_MODE_XGMII && > > phydev->interface != PHY_INTERFACE_MODE_USXGMII) > > return -ENODEV; > > The PHY is built-into the SoC, and as such the connection type should > always be "internal". The PHY does not exist as dedicated IC, only > as built-in part of the MT7988 SoC. That's not how it was described to me by Sky. If what you say is correct, then the implementation of mt798x_2p5ge_phy_get_rate_matching() which checks for interface modes other than INTERNAL is not correct. Also it means that config_init() should not permit anything but INTERNAL. Thanks. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel