1 // SPDX-License-Identifier: GPL-2.0-only
3  * phy-bcm-kona-usb2.c - Broadcom Kona USB2 Phy Driver
15 #include <linux/phy/phy.h>
34 static void bcm_kona_usb_phy_power(struct bcm_kona_usb *phy, int on)  in bcm_kona_usb_phy_power()  argument
38 	val = readl(phy->regs + OTGCTL);  in bcm_kona_usb_phy_power()
40 		/* Configure and power PHY */  in bcm_kona_usb_phy_power()
47 	writel(val, phy->regs + OTGCTL);  in bcm_kona_usb_phy_power()
50 static int bcm_kona_usb_phy_init(struct phy *gphy)  in bcm_kona_usb_phy_init()
52 	struct bcm_kona_usb *phy = phy_get_drvdata(gphy);  in bcm_kona_usb_phy_init()  local
55 	/* Soft reset PHY */  in bcm_kona_usb_phy_init()
56 	val = readl(phy->regs + P1CTL);  in bcm_kona_usb_phy_init()
59 	writel(val, phy->regs + P1CTL);  in bcm_kona_usb_phy_init()
60 	writel(val & ~P1CTL_SOFT_RESET, phy->regs + P1CTL);  in bcm_kona_usb_phy_init()
63 	writel(val | P1CTL_SOFT_RESET, phy->regs + P1CTL);  in bcm_kona_usb_phy_init()
68 static int bcm_kona_usb_phy_power_on(struct phy *gphy)  in bcm_kona_usb_phy_power_on()
70 	struct bcm_kona_usb *phy = phy_get_drvdata(gphy);  in bcm_kona_usb_phy_power_on()  local
72 	bcm_kona_usb_phy_power(phy, 1);  in bcm_kona_usb_phy_power_on()
77 static int bcm_kona_usb_phy_power_off(struct phy *gphy)  in bcm_kona_usb_phy_power_off()
79 	struct bcm_kona_usb *phy = phy_get_drvdata(gphy);  in bcm_kona_usb_phy_power_off()  local
81 	bcm_kona_usb_phy_power(phy, 0);  in bcm_kona_usb_phy_power_off()
95 	struct device *dev = &pdev->dev;  in bcm_kona_usb2_probe()
96 	struct bcm_kona_usb *phy;  in bcm_kona_usb2_probe()  local
98 	struct phy *gphy;  in bcm_kona_usb2_probe()
101 	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);  in bcm_kona_usb2_probe()
102 	if (!phy)  in bcm_kona_usb2_probe()
103 		return -ENOMEM;  in bcm_kona_usb2_probe()
106 	phy->regs = devm_ioremap_resource(&pdev->dev, res);  in bcm_kona_usb2_probe()
107 	if (IS_ERR(phy->regs))  in bcm_kona_usb2_probe()
108 		return PTR_ERR(phy->regs);  in bcm_kona_usb2_probe()
110 	platform_set_drvdata(pdev, phy);  in bcm_kona_usb2_probe()
116 	/* The Kona PHY supports an 8-bit wide UTMI interface */  in bcm_kona_usb2_probe()
119 	phy_set_drvdata(gphy, phy);  in bcm_kona_usb2_probe()
128 	{ .compatible = "brcm,kona-usb2-phy" },
137 		.name	= "bcm-kona-usb2",
144 MODULE_ALIAS("platform:bcm-kona-usb2");
146 MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver");