1*0347c692SLubomir Rintel // SPDX-License-Identifier: GPL-2.0+ 2*0347c692SLubomir Rintel /* 3*0347c692SLubomir Rintel * Copyright (C) 2020 Lubomir Rintel <lkundrak@v3.sk> 4*0347c692SLubomir Rintel */ 5*0347c692SLubomir Rintel 6*0347c692SLubomir Rintel #include <linux/delay.h> 7*0347c692SLubomir Rintel #include <linux/io.h> 8*0347c692SLubomir Rintel #include <linux/module.h> 9*0347c692SLubomir Rintel #include <linux/phy/phy.h> 10*0347c692SLubomir Rintel #include <linux/platform_device.h> 11*0347c692SLubomir Rintel 12*0347c692SLubomir Rintel #define HSIC_CTRL 0x08 13*0347c692SLubomir Rintel #define HSIC_ENABLE BIT(7) 14*0347c692SLubomir Rintel #define PLL_BYPASS BIT(4) 15*0347c692SLubomir Rintel 16*0347c692SLubomir Rintel static int mmp3_hsic_phy_init(struct phy *phy) 17*0347c692SLubomir Rintel { 18*0347c692SLubomir Rintel void __iomem *base = (void __iomem *)phy_get_drvdata(phy); 19*0347c692SLubomir Rintel u32 hsic_ctrl; 20*0347c692SLubomir Rintel 21*0347c692SLubomir Rintel hsic_ctrl = readl_relaxed(base + HSIC_CTRL); 22*0347c692SLubomir Rintel hsic_ctrl |= HSIC_ENABLE; 23*0347c692SLubomir Rintel hsic_ctrl |= PLL_BYPASS; 24*0347c692SLubomir Rintel writel_relaxed(hsic_ctrl, base + HSIC_CTRL); 25*0347c692SLubomir Rintel 26*0347c692SLubomir Rintel return 0; 27*0347c692SLubomir Rintel } 28*0347c692SLubomir Rintel 29*0347c692SLubomir Rintel static const struct phy_ops mmp3_hsic_phy_ops = { 30*0347c692SLubomir Rintel .init = mmp3_hsic_phy_init, 31*0347c692SLubomir Rintel .owner = THIS_MODULE, 32*0347c692SLubomir Rintel }; 33*0347c692SLubomir Rintel 34*0347c692SLubomir Rintel static const struct of_device_id mmp3_hsic_phy_of_match[] = { 35*0347c692SLubomir Rintel { .compatible = "marvell,mmp3-hsic-phy", }, 36*0347c692SLubomir Rintel { }, 37*0347c692SLubomir Rintel }; 38*0347c692SLubomir Rintel MODULE_DEVICE_TABLE(of, mmp3_hsic_phy_of_match); 39*0347c692SLubomir Rintel 40*0347c692SLubomir Rintel static int mmp3_hsic_phy_probe(struct platform_device *pdev) 41*0347c692SLubomir Rintel { 42*0347c692SLubomir Rintel struct device *dev = &pdev->dev; 43*0347c692SLubomir Rintel struct phy_provider *provider; 44*0347c692SLubomir Rintel struct resource *resource; 45*0347c692SLubomir Rintel void __iomem *base; 46*0347c692SLubomir Rintel struct phy *phy; 47*0347c692SLubomir Rintel 48*0347c692SLubomir Rintel resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); 49*0347c692SLubomir Rintel base = devm_ioremap_resource(dev, resource); 50*0347c692SLubomir Rintel if (IS_ERR(base)) { 51*0347c692SLubomir Rintel dev_err(dev, "failed to remap PHY regs\n"); 52*0347c692SLubomir Rintel return PTR_ERR(base); 53*0347c692SLubomir Rintel } 54*0347c692SLubomir Rintel 55*0347c692SLubomir Rintel phy = devm_phy_create(dev, NULL, &mmp3_hsic_phy_ops); 56*0347c692SLubomir Rintel if (IS_ERR(phy)) { 57*0347c692SLubomir Rintel dev_err(dev, "failed to create PHY\n"); 58*0347c692SLubomir Rintel return PTR_ERR(phy); 59*0347c692SLubomir Rintel } 60*0347c692SLubomir Rintel 61*0347c692SLubomir Rintel phy_set_drvdata(phy, (void *)base); 62*0347c692SLubomir Rintel provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); 63*0347c692SLubomir Rintel if (IS_ERR(provider)) { 64*0347c692SLubomir Rintel dev_err(dev, "failed to register PHY provider\n"); 65*0347c692SLubomir Rintel return PTR_ERR(provider); 66*0347c692SLubomir Rintel } 67*0347c692SLubomir Rintel 68*0347c692SLubomir Rintel return 0; 69*0347c692SLubomir Rintel } 70*0347c692SLubomir Rintel 71*0347c692SLubomir Rintel static struct platform_driver mmp3_hsic_phy_driver = { 72*0347c692SLubomir Rintel .probe = mmp3_hsic_phy_probe, 73*0347c692SLubomir Rintel .driver = { 74*0347c692SLubomir Rintel .name = "mmp3-hsic-phy", 75*0347c692SLubomir Rintel .of_match_table = mmp3_hsic_phy_of_match, 76*0347c692SLubomir Rintel }, 77*0347c692SLubomir Rintel }; 78*0347c692SLubomir Rintel module_platform_driver(mmp3_hsic_phy_driver); 79*0347c692SLubomir Rintel 80*0347c692SLubomir Rintel MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>"); 81*0347c692SLubomir Rintel MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver"); 82*0347c692SLubomir Rintel MODULE_LICENSE("GPL"); 83