1 // SPDX-License-Identifier: GPL-2.0-only
3  * PHY driver for NXP LPC18xx/43xx internal USB OTG PHY
13 #include <linux/phy/phy.h>
17 /* USB OTG PHY register offset and bit in CREG */
22 	struct phy *phy;  member
27 static int lpc18xx_usb_otg_phy_init(struct phy *phy)  in lpc18xx_usb_otg_phy_init()  argument
29 	struct lpc18xx_usb_otg_phy *lpc = phy_get_drvdata(phy);  in lpc18xx_usb_otg_phy_init()
32 	/* The PHY must be clocked at 480 MHz */  in lpc18xx_usb_otg_phy_init()
33 	ret = clk_set_rate(lpc->clk, 480000000);  in lpc18xx_usb_otg_phy_init()
37 	return clk_prepare(lpc->clk);  in lpc18xx_usb_otg_phy_init()
40 static int lpc18xx_usb_otg_phy_exit(struct phy *phy)  in lpc18xx_usb_otg_phy_exit()  argument
42 	struct lpc18xx_usb_otg_phy *lpc = phy_get_drvdata(phy);  in lpc18xx_usb_otg_phy_exit()
44 	clk_unprepare(lpc->clk);  in lpc18xx_usb_otg_phy_exit()
49 static int lpc18xx_usb_otg_phy_power_on(struct phy *phy)  in lpc18xx_usb_otg_phy_power_on()  argument
51 	struct lpc18xx_usb_otg_phy *lpc = phy_get_drvdata(phy);  in lpc18xx_usb_otg_phy_power_on()
54 	ret = clk_enable(lpc->clk);  in lpc18xx_usb_otg_phy_power_on()
58 	/* The bit in CREG is cleared to enable the PHY */  in lpc18xx_usb_otg_phy_power_on()
59 	ret = regmap_update_bits(lpc->reg, LPC18XX_CREG_CREG0,  in lpc18xx_usb_otg_phy_power_on()
62 		clk_disable(lpc->clk);  in lpc18xx_usb_otg_phy_power_on()
69 static int lpc18xx_usb_otg_phy_power_off(struct phy *phy)  in lpc18xx_usb_otg_phy_power_off()  argument
71 	struct lpc18xx_usb_otg_phy *lpc = phy_get_drvdata(phy);  in lpc18xx_usb_otg_phy_power_off()
74 	ret = regmap_update_bits(lpc->reg, LPC18XX_CREG_CREG0,  in lpc18xx_usb_otg_phy_power_off()
80 	clk_disable(lpc->clk);  in lpc18xx_usb_otg_phy_power_off()
98 	lpc = devm_kzalloc(&pdev->dev, sizeof(*lpc), GFP_KERNEL);  in lpc18xx_usb_otg_phy_probe()
100 		return -ENOMEM;  in lpc18xx_usb_otg_phy_probe()
102 	lpc->reg = syscon_node_to_regmap(pdev->dev.of_node->parent);  in lpc18xx_usb_otg_phy_probe()
103 	if (IS_ERR(lpc->reg)) {  in lpc18xx_usb_otg_phy_probe()
104 		dev_err(&pdev->dev, "failed to get syscon\n");  in lpc18xx_usb_otg_phy_probe()
105 		return PTR_ERR(lpc->reg);  in lpc18xx_usb_otg_phy_probe()
108 	lpc->clk = devm_clk_get(&pdev->dev, NULL);  in lpc18xx_usb_otg_phy_probe()
109 	if (IS_ERR(lpc->clk)) {  in lpc18xx_usb_otg_phy_probe()
110 		dev_err(&pdev->dev, "failed to get clock\n");  in lpc18xx_usb_otg_phy_probe()
111 		return PTR_ERR(lpc->clk);  in lpc18xx_usb_otg_phy_probe()
114 	lpc->phy = devm_phy_create(&pdev->dev, NULL, &lpc18xx_usb_otg_phy_ops);  in lpc18xx_usb_otg_phy_probe()
115 	if (IS_ERR(lpc->phy)) {  in lpc18xx_usb_otg_phy_probe()
116 		dev_err(&pdev->dev, "failed to create PHY\n");  in lpc18xx_usb_otg_phy_probe()
117 		return PTR_ERR(lpc->phy);  in lpc18xx_usb_otg_phy_probe()
120 	phy_set_drvdata(lpc->phy, lpc);  in lpc18xx_usb_otg_phy_probe()
122 	phy_provider = devm_of_phy_provider_register(&pdev->dev,  in lpc18xx_usb_otg_phy_probe()
129 	{ .compatible = "nxp,lpc1850-usb-otg-phy" },
137 		.name	= "lpc18xx-usb-otg-phy",
144 MODULE_DESCRIPTION("NXP LPC18xx/43xx USB OTG PHY driver");