// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Microchip Technology #include <linux/kernel.h> #include <linux/module.h> #include <linux/mii.h> #include <linux/phy.h> /* Interrupt Source Register */ #define LAN87XX_INTERRUPT_SOURCE (0x18) /* Interrupt Mask Register */ #define LAN87XX_INTERRUPT_MASK (0x19) #define LAN87XX_MASK_LINK_UP (0x0004) #define LAN87XX_MASK_LINK_DOWN (0x0002) #define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>" #define DRIVER_DESC "Microchip LAN87XX T1 PHY driver" static int lan87xx_phy_config_intr(struct phy_device *phydev) { int rc, val = 0; if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { /* unmask all source and clear them before enable */ rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0x7FFF); rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE); val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN; } rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val); return rc < 0 ? rc : 0; } static int lan87xx_phy_ack_interrupt(struct phy_device *phydev) { int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE); return rc < 0 ? rc : 0; } static struct phy_driver microchip_t1_phy_driver[] = { { .phy_id = 0x0007c150, .phy_id_mask = 0xfffffff0, .name = "Microchip LAN87xx T1", .features = PHY_BASIC_T1_FEATURES, .config_aneg = genphy_config_aneg, .ack_interrupt = lan87xx_phy_ack_interrupt, .config_intr = lan87xx_phy_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, } }; module_phy_driver(microchip_t1_phy_driver); static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = { { 0x0007c150, 0xfffffff0 }, { } }; MODULE_DEVICE_TABLE(mdio, microchip_t1_tbl); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL");