81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Lubomir Rintel <lkundrak@v3.sk>
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#define HSIC_CTRL 0x08
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#define HSIC_ENABLE BIT(7)
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#define PLL_BYPASS BIT(4)
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static int mmp3_hsic_phy_init(struct phy *phy)
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{
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void __iomem *base = (void __iomem *)phy_get_drvdata(phy);
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u32 hsic_ctrl;
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hsic_ctrl = readl_relaxed(base + HSIC_CTRL);
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hsic_ctrl |= HSIC_ENABLE;
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hsic_ctrl |= PLL_BYPASS;
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writel_relaxed(hsic_ctrl, base + HSIC_CTRL);
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return 0;
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}
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static const struct phy_ops mmp3_hsic_phy_ops = {
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.init = mmp3_hsic_phy_init,
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.owner = THIS_MODULE,
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};
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static const struct of_device_id mmp3_hsic_phy_of_match[] = {
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{ .compatible = "marvell,mmp3-hsic-phy", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, mmp3_hsic_phy_of_match);
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static int mmp3_hsic_phy_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct phy_provider *provider;
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struct resource *resource;
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void __iomem *base;
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struct phy *phy;
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resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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base = devm_ioremap_resource(dev, resource);
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if (IS_ERR(base))
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return PTR_ERR(base);
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phy = devm_phy_create(dev, NULL, &mmp3_hsic_phy_ops);
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if (IS_ERR(phy)) {
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dev_err(dev, "failed to create PHY\n");
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return PTR_ERR(phy);
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}
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phy_set_drvdata(phy, (void *)base);
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provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
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if (IS_ERR(provider)) {
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dev_err(dev, "failed to register PHY provider\n");
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return PTR_ERR(provider);
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}
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return 0;
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}
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static struct platform_driver mmp3_hsic_phy_driver = {
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.probe = mmp3_hsic_phy_probe,
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.driver = {
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.name = "mmp3-hsic-phy",
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.of_match_table = mmp3_hsic_phy_of_match,
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},
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};
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module_platform_driver(mmp3_hsic_phy_driver);
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MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
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MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver");
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MODULE_LICENSE("GPL");
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