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80 lines
1.9 KiB
80 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2020 Lubomir Rintel <[email protected]> |
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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 <[email protected]>"); |
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MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver"); |
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MODULE_LICENSE("GPL");
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