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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Stefan Eichenberger , , Subject: [PATCH net] net: phy: c45: select 10BASE-T1L type when forcing 10 Mbit/s Date: Wed, 4 Nov 2026 17:25:33 +0200 Message-ID: <20261104152534.1425241-1-iustin.stolniceanu@analog.com> X-Mailer: git-send-email 2.43.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: IcP6hChgEBx0t-zL9X7e0FFHY_2Pjj0V X-Proofpoint-GUID: IcP6hChgEBx0t-zL9X7e0FFHY_2Pjj0V X-Authority-Analysis: v=2.4 cv=Y7RtIReN c=1 sm=1 tr=0 ts=6aeb4e7f cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=OmVn7CZJonkx5R5zMQLL:22 a=gAnH3GRIAAAA:8 a=xprKiDpmGtg8Dz3ZEOAA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYxMTA0MDA2MSBTYWx0ZWRfX+AcHj6froNue EEkyD8nY2CxFGIRohMjvRBx1HjTrJlAV3xoTHM2P/GVzhbbmdKJ1jznQnrWhbASX7aXC/t67jbX lUOs1vwQsGwWJ5vCk5W+guQZk6qz0ZXANGNLrzalH+UxH4pnpoLy X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTA0MDA2MSBTYWx0ZWRfX/N6CBG5GOonw 24MH2c/TLiDLAUDoG34eiYBHJp0YajbH3qU/xLqCwo7SNtxy5IiPS5MGc6lu7wJDEVF5H0lTI/x 7V5cPE365SvEKxrGVTNvjzAXctTR7hBRZpQO1PrzO7m6k58rva37dQcvxT0roSRuXi/gSDyHs3L rmGQACyoplmoyG/8MFmrTRxDsyJSPfsKJKIRoxP0nTWcgWNh1R6NTp6xgufEhjO6NqYhU+JF5Oz Dv0oWe+myCKj8v2WYInfmpGICyeUfgGj4SmSNWPKwWOY6uEwOTWuVwItd41VjWQLs7wK815Ib+/ rJ8Ue7UKsHaUucnpwwK5SiX8mGCyHm2Gxww4wmlWBtc60Ngj6RE3q6xpMBS4Yu3J5xFzDjAzOsa RbuYvdxh0cFZEGrLkqReCslC/OmQc+Jcdo9m781P9SIzvm2w+EYvkXrjPFMVW+SZ2JaN2DzDvyN r14QbFK0FYkAHiUvz5g== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-04_04,2026-11-03_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 suspectscore=0 lowpriorityscore=0 clxscore=1011 spamscore=0 bulkscore=0 adultscore=0 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611040061 Since 25108a834e14, genphy_c45_pma_setup_forced() writes the type selection field of the BASE-T1 PMA/PMD control register (1.2100) on every forced setup, using 0 for anything other than 1000 Mbit/s. 0 is 100BASE-T1, which a 10BASE-T1L PHY like the ADIN1100 does not support, so the forced link never comes up. Select 10BASE-T1L for SPEED_10 when the PHY reports 10baseT1L_Full support. Tested on EVAL-ADIN1110EBZ (ADIN1110 with internal ADIN1100 PHY). After ethtool -s ethX autoneg off speed 10 master-slave forced-master 1.2100 reads 0xc002, it was 0xc000 before. Fixes: 25108a834e14 ("net: phy: c45: add support for 1000BASE-T1 forced setup") Signed-off-by: Iustin Stolniceanu --- drivers/net/phy/phy-c45.c | 4 ++++ include/uapi/linux/mdio.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c index 870920311f9a..8671deda81c9 100644 --- a/drivers/net/phy/phy-c45.c +++ b/drivers/net/phy/phy-c45.c @@ -182,6 +182,10 @@ int genphy_c45_pma_setup_forced(struct phy_device *phydev) bt1_ctrl = 0; if (phydev->speed == SPEED_1000) bt1_ctrl = MDIO_PMA_PMD_BT1_CTRL_STRAP_B1000; + else if (phydev->speed == SPEED_10 && + linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, + phydev->supported)) + bt1_ctrl = MDIO_PMA_PMD_BT1_CTRL_STRAP_B10L; ret = phy_modify_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_PMD_BT1_CTRL, MDIO_PMA_PMD_BT1_CTRL_STRAP, bt1_ctrl); diff --git a/include/uapi/linux/mdio.h b/include/uapi/linux/mdio.h index 06f4bc3c20c7..f46529451cc8 100644 --- a/include/uapi/linux/mdio.h +++ b/include/uapi/linux/mdio.h @@ -419,6 +419,7 @@ /* BASE-T1 PMA/PMD control register */ #define MDIO_PMA_PMD_BT1_CTRL_STRAP 0x000F /* Type selection (Strap) */ #define MDIO_PMA_PMD_BT1_CTRL_STRAP_B1000 0x0001 /* Select 1000BASE-T1 */ +#define MDIO_PMA_PMD_BT1_CTRL_STRAP_B10L 0x0002 /* Select 10BASE-T1L */ #define MDIO_PMA_PMD_BT1_CTRL_CFG_MST 0x4000 /* MASTER-SLAVE config value */ /* 1000BASE-T1 PCS control register */ -- 2.43.0