10347c692SLubomir Rintel // SPDX-License-Identifier: GPL-2.0+
20347c692SLubomir Rintel /*
30347c692SLubomir Rintel * Copyright (C) 2020 Lubomir Rintel <lkundrak@v3.sk>
40347c692SLubomir Rintel */
50347c692SLubomir Rintel
60347c692SLubomir Rintel #include <linux/delay.h>
70347c692SLubomir Rintel #include <linux/io.h>
8*7559e757SRob Herring #include <linux/mod_devicetable.h>
90347c692SLubomir Rintel #include <linux/module.h>
100347c692SLubomir Rintel #include <linux/phy/phy.h>
110347c692SLubomir Rintel #include <linux/platform_device.h>
120347c692SLubomir Rintel
130347c692SLubomir Rintel #define HSIC_CTRL 0x08
140347c692SLubomir Rintel #define HSIC_ENABLE BIT(7)
150347c692SLubomir Rintel #define PLL_BYPASS BIT(4)
160347c692SLubomir Rintel
mmp3_hsic_phy_init(struct phy * phy)170347c692SLubomir Rintel static int mmp3_hsic_phy_init(struct phy *phy)
180347c692SLubomir Rintel {
190347c692SLubomir Rintel void __iomem *base = (void __iomem *)phy_get_drvdata(phy);
200347c692SLubomir Rintel u32 hsic_ctrl;
210347c692SLubomir Rintel
220347c692SLubomir Rintel hsic_ctrl = readl_relaxed(base + HSIC_CTRL);
230347c692SLubomir Rintel hsic_ctrl |= HSIC_ENABLE;
240347c692SLubomir Rintel hsic_ctrl |= PLL_BYPASS;
250347c692SLubomir Rintel writel_relaxed(hsic_ctrl, base + HSIC_CTRL);
260347c692SLubomir Rintel
270347c692SLubomir Rintel return 0;
280347c692SLubomir Rintel }
290347c692SLubomir Rintel
300347c692SLubomir Rintel static const struct phy_ops mmp3_hsic_phy_ops = {
310347c692SLubomir Rintel .init = mmp3_hsic_phy_init,
320347c692SLubomir Rintel .owner = THIS_MODULE,
330347c692SLubomir Rintel };
340347c692SLubomir Rintel
350347c692SLubomir Rintel static const struct of_device_id mmp3_hsic_phy_of_match[] = {
360347c692SLubomir Rintel { .compatible = "marvell,mmp3-hsic-phy", },
370347c692SLubomir Rintel { },
380347c692SLubomir Rintel };
390347c692SLubomir Rintel MODULE_DEVICE_TABLE(of, mmp3_hsic_phy_of_match);
400347c692SLubomir Rintel
mmp3_hsic_phy_probe(struct platform_device * pdev)410347c692SLubomir Rintel static int mmp3_hsic_phy_probe(struct platform_device *pdev)
420347c692SLubomir Rintel {
430347c692SLubomir Rintel struct device *dev = &pdev->dev;
440347c692SLubomir Rintel struct phy_provider *provider;
450347c692SLubomir Rintel void __iomem *base;
460347c692SLubomir Rintel struct phy *phy;
470347c692SLubomir Rintel
48b53e1979SMinghao Chi base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
49349f9832SHe Ying if (IS_ERR(base))
500347c692SLubomir Rintel return PTR_ERR(base);
510347c692SLubomir Rintel
520347c692SLubomir Rintel phy = devm_phy_create(dev, NULL, &mmp3_hsic_phy_ops);
530347c692SLubomir Rintel if (IS_ERR(phy)) {
540347c692SLubomir Rintel dev_err(dev, "failed to create PHY\n");
550347c692SLubomir Rintel return PTR_ERR(phy);
560347c692SLubomir Rintel }
570347c692SLubomir Rintel
580347c692SLubomir Rintel phy_set_drvdata(phy, (void *)base);
590347c692SLubomir Rintel provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
600347c692SLubomir Rintel if (IS_ERR(provider)) {
610347c692SLubomir Rintel dev_err(dev, "failed to register PHY provider\n");
620347c692SLubomir Rintel return PTR_ERR(provider);
630347c692SLubomir Rintel }
640347c692SLubomir Rintel
650347c692SLubomir Rintel return 0;
660347c692SLubomir Rintel }
670347c692SLubomir Rintel
680347c692SLubomir Rintel static struct platform_driver mmp3_hsic_phy_driver = {
690347c692SLubomir Rintel .probe = mmp3_hsic_phy_probe,
700347c692SLubomir Rintel .driver = {
710347c692SLubomir Rintel .name = "mmp3-hsic-phy",
720347c692SLubomir Rintel .of_match_table = mmp3_hsic_phy_of_match,
730347c692SLubomir Rintel },
740347c692SLubomir Rintel };
750347c692SLubomir Rintel module_platform_driver(mmp3_hsic_phy_driver);
760347c692SLubomir Rintel
770347c692SLubomir Rintel MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
780347c692SLubomir Rintel MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver");
790347c692SLubomir Rintel MODULE_LICENSE("GPL");
80