From patchwork Wed Aug 24 10:40:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= X-Patchwork-Id: 12953247 X-Patchwork-Delegate: kuba@kernel.org 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 DD8F3C32796 for ; Wed, 24 Aug 2022 10:44:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236998AbiHXKou (ORCPT ); Wed, 24 Aug 2022 06:44:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236956AbiHXKog (ORCPT ); Wed, 24 Aug 2022 06:44:36 -0400 Received: from sender4-op-o14.zoho.com (sender4-op-o14.zoho.com [136.143.188.14]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92DA282FAD; Wed, 24 Aug 2022 03:44:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1661337841; cv=none; d=zohomail.com; s=zohoarc; b=DGFoXwrSpv+yWpxI5j0y8hE5AkUjtKoMW+7hWOF0FIyThNe93/+I+OJ5bWw/RiKIvgzmlVmsMfve569aTt+VGbmiCaol6VkKyrUSy0I7fvmqftwKzc1zKU9zWNCSX0rjf0QqG5eknnVHXENJne7HuvfloKD0c6xJVBVoCGS2A1w= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1661337841; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=cPLqf0aeTGu1FRkQmqhlJeNc1VRyE6MSbUv3PkNrmos=; b=Rd6sS4uLNCiI61NKW93ZBs+pguQj+iK9NrWQBaxbcrAZZs3PlOkizUbJmq7BXgEvjFtNrXdJNo4kTsCYO/DSH4M0+Pf7hBKnsZ7StDz6GNhlBgOJFzkLsIIkKtlINwnFGoF1NkjMgnTDLZgdFGMtLTP1CtFymaEV+kyHS1pN7SM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=arinc9.com; spf=pass smtp.mailfrom=arinc.unal@arinc9.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1661337841; s=zmail; d=arinc9.com; i=arinc.unal@arinc9.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-Id:Message-Id:In-Reply-To:References:MIME-Version:Content-Type:Content-Transfer-Encoding:Reply-To; bh=cPLqf0aeTGu1FRkQmqhlJeNc1VRyE6MSbUv3PkNrmos=; b=RxpK93jozgkgCv0QAS28ERzBObDK9gYdsWcbKiZYkzRYWzet0ti917LzNq2xf5B8 0ioH1d2tQeOMFaAjWLb+vxEuIIcVrh22QE3Q+w4ROXnnoN0lEVnHec0g9r39OAPGJmT sR4WppFERQ0bW0rAZxrLcxH2opMo5GFCd/lVRgFI= Received: from arinc9-PC.lan (37.120.152.236 [37.120.152.236]) by mx.zohomail.com with SMTPS id 1661337840616440.98601086738756; Wed, 24 Aug 2022 03:44:00 -0700 (PDT) From: =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Matthias Brugger , Sean Wang , Landen Chao , DENG Qingfang , Frank Wunderlich , Luiz Angelo Daros de Luca , Sander Vanheule , Daniel Golle , erkin.bozoglu@xeront.com, Sergio Paracuellos Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= , Krzysztof Kozlowski Subject: [PATCH v5 7/7] dt-bindings: net: dsa: mediatek,mt7530: update binding description Date: Wed, 24 Aug 2022 13:40:40 +0300 Message-Id: <20220824104040.17527-8-arinc.unal@arinc9.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220824104040.17527-1-arinc.unal@arinc9.com> References: <20220824104040.17527-1-arinc.unal@arinc9.com> MIME-Version: 1.0 X-ZohoMailClient: External Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Update the description of the binding. - Describe the switches, which SoCs they are in, or if they are standalone. - Explain the various ways of configuring MT7530's port 5. - Remove phy-mode = "rgmii-txid" from description. Same code path is followed for delayed rgmii and rgmii phy-mode on mtk_eth_soc.c. Signed-off-by: Arınç ÜNAL Acked-by: Krzysztof Kozlowski --- .../bindings/net/dsa/mediatek,mt7530.yaml | 97 ++++++++++++------- 1 file changed, 62 insertions(+), 35 deletions(-) diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml index 6d7228687d36..d45af810ea13 100644 --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml @@ -13,41 +13,68 @@ maintainers: - Sean Wang description: | - Port 5 of mt7530 and mt7621 switch is muxed between: - 1. GMAC5: GMAC5 can interface with another external MAC or PHY. - 2. PHY of port 0 or port 4: PHY interfaces with an external MAC like 2nd GMAC - of the SOC. Used in many setups where port 0/4 becomes the WAN port. - Note: On a MT7621 SOC with integrated switch: 2nd GMAC can only connected to - GMAC5 when the gpios for RGMII2 (GPIO 22-33) are not used and not - connected to external component! - - Port 5 modes/configurations: - 1. Port 5 is disabled and isolated: An external phy can interface to the 2nd - GMAC of the SOC. - In the case of a build-in MT7530 switch, port 5 shares the RGMII bus with 2nd - GMAC and an optional external phy. Mind the GPIO/pinctl settings of the SOC! - 2. Port 5 is muxed to PHY of port 0/4: Port 0/4 interfaces with 2nd GMAC. - It is a simple MAC to PHY interface, port 5 needs to be setup for xMII mode - and RGMII delay. - 3. Port 5 is muxed to GMAC5 and can interface to an external phy. - Port 5 becomes an extra switch port. - Only works on platform where external phy TX<->RX lines are swapped. - Like in the Ubiquiti ER-X-SFP. - 4. Port 5 is muxed to GMAC5 and interfaces with the 2nd GAMC as 2nd CPU port. - Currently a 2nd CPU port is not supported by DSA code. - - Depending on how the external PHY is wired: - 1. normal: The PHY can only connect to 2nd GMAC but not to the switch - 2. swapped: RGMII TX, RX are swapped; external phy interface with the switch as - a ethernet port. But can't interface to the 2nd GMAC. - - Based on the DT the port 5 mode is configured. - - Driver tries to lookup the phy-handle of the 2nd GMAC of the master device. - When phy-handle matches PHY of port 0 or 4 then port 5 set-up as mode 2. - phy-mode must be set, see also example 2 below! - * mt7621: phy-mode = "rgmii-txid"; - * mt7623: phy-mode = "rgmii"; + There are two versions of MT7530, standalone and in a multi-chip module. + + MT7530 is a part of the multi-chip module in MT7620AN, MT7620DA, MT7620DAN, + MT7620NN, MT7621AT, MT7621DAT, MT7621ST and MT7623AI SoCs. + + MT7530 in MT7620AN, MT7620DA, MT7620DAN and MT7620NN SoCs has got 10/100 PHYs + and the switch registers are directly mapped into SoC's memory map rather than + using MDIO. The DSA driver currently doesn't support this. + + There is only the standalone version of MT7531. + + Port 5 on MT7530 has got various ways of configuration. + + For standalone MT7530: + + - Port 5 can be used as a CPU port. + + - PHY 0 or 4 of the switch can be muxed to connect to the gmac of the SoC + which port 5 is wired to. Usually used for connecting the wan port + directly to the CPU to achieve 2 Gbps routing in total. + + The driver looks up the reg on the ethernet-phy node which the phy-handle + property refers to on the gmac node to mux the specified phy. + + The driver requires the gmac of the SoC to have "mediatek,eth-mac" as the + compatible string and the reg must be 1. So, for now, only gmac1 of an + MediaTek SoC can benefit this. Banana Pi BPI-R2 suits this. + Check out example 5 for a similar configuration. + + - Port 5 can be wired to an external phy. Port 5 becomes a DSA slave. + Check out example 7 for a similar configuration. + + For multi-chip module MT7530: + + - Port 5 can be used as a CPU port. + + - PHY 0 or 4 of the switch can be muxed to connect to gmac1 of the SoC. + Usually used for connecting the wan port directly to the CPU to achieve 2 + Gbps routing in total. + + The driver looks up the reg on the ethernet-phy node which the phy-handle + property refers to on the gmac node to mux the specified phy. + + For the MT7621 SoCs, rgmii2 group must be claimed with rgmii2 function. + Check out example 5. + + - In case of an external phy wired to gmac1 of the SoC, port 5 must not be + enabled. + + In case of muxing PHY 0 or 4, the external phy must not be enabled. + + For the MT7621 SoCs, rgmii2 group must be claimed with rgmii2 function. + Check out example 6. + + - Port 5 can be muxed to an external phy. Port 5 becomes a DSA slave. + The external phy must be wired TX to TX to gmac1 of the SoC for this to + work. Ubiquiti EdgeRouter X SFP is wired this way. + + Muxing PHY 0 or 4 won't work when the external phy is connected TX to TX. + + For the MT7621 SoCs, rgmii2 group must be claimed with gpio function. + Check out example 7. properties: compatible: