RE: [net-next,PATCH] enetc: Set eMDIO MDC rate to 2.5 MHz only on i.MX95
flat view
From: Wei Fang <wei.fang@nxp.com>
Date: 2026-10-08 03:24:38
Also in:
imx, lkml
static const struct pci_device_id enetc_pci_mdio_id_table[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_MDIO_DEV_ID) },
- { PCI_DEVICE(NETC_EMDIO_VEN_ID, NETC_EMDIO_DEV_ID) },
+ { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_MDIO_DEV_ID), 0, 0,
258 },
+ { PCI_DEVICE(NETC_EMDIO_VEN_ID, NETC_EMDIO_DEV_ID), 0, 0, 66 },
{ 0, } /* End of table. */
};No, please do not add the divisor to the driver_data. All NETC v4 devices use the same vendor ID and device ID, but their system clock may be different. So the divisor is different as well. In addition to EMDIO, the ENETC port and NETC switch port also support virtual MDIO, which uses their own MDIO registers to access the external PHY. Therefore, the modifications go far beyond this. If you don't mind, I can add a patch set to address this issue later. You can simply revert the commit 587acb86d646 "enetc: Increase eMDIO MDC rate to 2.5 MHz".
quoted hunk ↗ jump to hunk
MODULE_DEVICE_TABLE(pci, enetc_pci_mdio_id_table);diff --git a/include/linux/fsl/enetc_mdio.h b/include/linux/fsl/enetc_mdio.h index 623ccfcbf39c3..7dfd65622c95d 100644 --- a/include/linux/fsl/enetc_mdio.h +++ b/include/linux/fsl/enetc_mdio.h@@ -33,6 +33,7 @@ struct enetc_hw; struct enetc_mdio_priv { struct enetc_hw *hw; int mdio_base; + int mdc_div; }; #if IS_REACHABLE(CONFIG_FSL_ENETC_MDIO) --2.53.0