1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright 2021 NXP Semiconductors 3 */ 4 #include <linux/pcs/pcs-xpcs.h> 5 #include "pcs-xpcs.h" 6 7 /* In NXP SJA1105, the PCS is integrated with a PMA that has the TX lane 8 * polarity inverted by default (PLUS is MINUS, MINUS is PLUS). To obtain 9 * normal non-inverted behavior, the TX lane polarity must be inverted in the 10 * PCS, via the DIGITAL_CONTROL_2 register. 11 */ 12 int nxp_sja1105_sgmii_pma_config(struct dw_xpcs *xpcs) 13 { 14 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL2, 15 DW_VR_MII_DIG_CTRL2_TX_POL_INV); 16 } 17