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<009e01dd1a6b$d9726a80$8c573f80$@gmx.de> <420dbb03-6a39-4ef3-9cb3-da78401fd4ce@lunn.ch> In-Reply-To: <420dbb03-6a39-4ef3-9cb3-da78401fd4ce@lunn.ch> Subject: AW: [PATCH net-next v5 2/8] net: mdio: realtek-rtl9300: Add polling documentation Date: Thu, 23 Jul 2026 21:43:02 +0200 Message-ID: <005601dd1adb$7d1cc3a0$77564ae0$@gmx.de> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQK/Le43oqC7DF9RxGQXBKOvw8+FqAGoVyPIAknS77sCpcYhcQIdcjnstHGp1GA= Content-Language: de X-Provags-ID: V03:K1:Inxb2o4bu7NsbdH4lIuLiezCzItMk19BLe6KEY9o7oBYWiW8018 TYSZ6gqknOW3hx+Jsh8dx6l8GwNTO21aAP7Zua/euE4ILDov73hnLQP9h/ZeFRyVt54aJ4x lx1hu/GSObUf0QkRziGIAR3dU/nAxy8HUBKV9RlpjrVmJrsnyOOi6JByHKqoDvbqgCoNNFX 4fRG0LTzjG0TqL8J+Tn9g== X-Spam-Flag: NO UI-OutboundReport: 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Juli 2026 16:18 > An: Markus Stockhausen > Betreff: Re: [PATCH net-next v5 2/8] net: mdio: realtek-rtl9300: Add polling documentation > .. > Just to be sure. You have a broken cable, so could trigger downshift? I usually tape pin 8 for these kind of tests. RTL838x switch side gives (port 8 aka LAN1): MAC link status: root@OpenWrt:~# devmem 0x1b00a190 0x00010000 So Port 8 =3D 100 Mbit see https://svanheule.net/realtek/maple/register/mac_link_spd_sts MAC force mode for port 8: root@OpenWrt:~# devmem 0x1b00a124 0x00D71EEC So port 8: NWAY_EN=3D1 SPD_SEL=3D3 (aka 1000Mbit) See https://svanheule.net/realtek/maple/register/mac_force_mode_ctrl PHY view root@OpenWrt:~# ethtool lan1 Settings for lan1: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Link partner advertised pause frame use: No Link partner advertised auto-negotiation: Yes Link partner advertised FEC modes: Not reported Speed: 100Mb/s Duplex: Full Port: Twisted Pair PHYAD: 8 Transceiver: external Auto-negotiation: on MDI-X: Unknown Supports Wake-on: d Wake-on: d Link detected: yes Nanopi R5S on other side gives: root@nanopi:~# ethtool eth2 Settings for eth2: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full 2500baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full 2500baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Link partner advertised pause frame use: Symmetric Receive-only Link partner advertised auto-negotiation: Yes Link partner advertised FEC modes: Not reported Speed: 100Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: pumbg Wake-on: d Link detected: yes