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1// SPDX-License-Identifier: GPL-2.0-only2// Copyright (C) 2016 Broadcom3 4#include <linux/device.h>5#include <linux/module.h>6#include <linux/of_mdio.h>7#include <linux/mdio.h>8#include <linux/phy.h>9#include <linux/phy/phy.h>10 11#define BLK_ADDR_REG_OFFSET 0x1f12#define PLL_AFE1_100MHZ_BLK 0x210013#define PLL_CLK_AMP_OFFSET 0x0314#define PLL_CLK_AMP_2P05V 0x2b1815 16static int ns2_pci_phy_init(struct phy *p)17{18 struct mdio_device *mdiodev = phy_get_drvdata(p);19 int rc;20 21 /* select the AFE 100MHz block page */22 rc = mdiodev_write(mdiodev, BLK_ADDR_REG_OFFSET, PLL_AFE1_100MHZ_BLK);23 if (rc)24 goto err;25 26 /* set the 100 MHz reference clock amplitude to 2.05 v */27 rc = mdiodev_write(mdiodev, PLL_CLK_AMP_OFFSET, PLL_CLK_AMP_2P05V);28 if (rc)29 goto err;30 31 return 0;32 33err:34 dev_err(&mdiodev->dev, "Error %d writing to phy\n", rc);35 return rc;36}37 38static const struct phy_ops ns2_pci_phy_ops = {39 .init = ns2_pci_phy_init,40 .owner = THIS_MODULE,41};42 43static int ns2_pci_phy_probe(struct mdio_device *mdiodev)44{45 struct device *dev = &mdiodev->dev;46 struct phy_provider *provider;47 struct phy *phy;48 49 phy = devm_phy_create(dev, dev->of_node, &ns2_pci_phy_ops);50 if (IS_ERR(phy)) {51 dev_err(dev, "failed to create Phy\n");52 return PTR_ERR(phy);53 }54 55 phy_set_drvdata(phy, mdiodev);56 57 provider = devm_of_phy_provider_register(&phy->dev,58 of_phy_simple_xlate);59 if (IS_ERR(provider)) {60 dev_err(dev, "failed to register Phy provider\n");61 return PTR_ERR(provider);62 }63 64 dev_info(dev, "%s PHY registered\n", dev_name(dev));65 66 return 0;67}68 69static const struct of_device_id ns2_pci_phy_of_match[] = {70 { .compatible = "brcm,ns2-pcie-phy", },71 { /* sentinel */ },72};73MODULE_DEVICE_TABLE(of, ns2_pci_phy_of_match);74 75static struct mdio_driver ns2_pci_phy_driver = {76 .mdiodrv = {77 .driver = {78 .name = "phy-bcm-ns2-pci",79 .of_match_table = ns2_pci_phy_of_match,80 },81 },82 .probe = ns2_pci_phy_probe,83};84mdio_module_driver(ns2_pci_phy_driver);85 86MODULE_AUTHOR("Broadcom");87MODULE_DESCRIPTION("Broadcom Northstar2 PCI Phy driver");88MODULE_LICENSE("GPL v2");89MODULE_ALIAS("platform:phy-bcm-ns2-pci");90