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