1 // SPDX-License-Identifier: GPL-2.0
13 #include <linux/phy/phy.h>
17 /* USB PHY Miscellaneous Control Register */
19 #define PHY0POR			BIT(0)  /* PHY Power-On Reset Control Bit */
20 #define PHY0SUSPEND			BIT(1)  /* PHY Suspend; 0: suspend, 1: operaion */
21 #define PHY0COMN			BIT(2)  /* PHY Common Block Power-Down Control */
22 #define PHY0DEVCKSTB			BIT(10) /* PHY 60 MHz UTMI clock stable bit */
30 static int ma35_usb_phy_power_on(struct phy *phy)  in ma35_usb_phy_power_on()  argument
32 	struct ma35_usb_phy *p_phy = phy_get_drvdata(phy);  in ma35_usb_phy_power_on()
36 	ret = clk_prepare_enable(p_phy->clk);  in ma35_usb_phy_power_on()
38 		dev_err(p_phy->dev, "Failed to enable PHY clock: %d\n", ret);  in ma35_usb_phy_power_on()
42 	regmap_read(p_phy->sysreg, MA35_SYS_REG_USBPMISCR, &val);  in ma35_usb_phy_power_on()
46 		 * make sure USB PHY 60 MHz UTMI Interface Clock ready  in ma35_usb_phy_power_on()
48 		ret = regmap_read_poll_timeout(p_phy->sysreg, MA35_SYS_REG_USBPMISCR, val,  in ma35_usb_phy_power_on()
58 	regmap_update_bits(p_phy->sysreg, MA35_SYS_REG_USBPMISCR, 0x7, (PHY0POR | PHY0SUSPEND));  in ma35_usb_phy_power_on()
62 	regmap_update_bits(p_phy->sysreg, MA35_SYS_REG_USBPMISCR, 0x7, PHY0SUSPEND);  in ma35_usb_phy_power_on()
64 	/* make sure USB PHY 60 MHz UTMI Interface Clock ready */  in ma35_usb_phy_power_on()
65 	ret = regmap_read_poll_timeout(p_phy->sysreg, MA35_SYS_REG_USBPMISCR, val,  in ma35_usb_phy_power_on()
67 	if (ret == -ETIMEDOUT) {  in ma35_usb_phy_power_on()
68 		dev_err(p_phy->dev, "Check PHY clock, Timeout: %d\n", ret);  in ma35_usb_phy_power_on()
69 		clk_disable_unprepare(p_phy->clk);  in ma35_usb_phy_power_on()
76 static int ma35_usb_phy_power_off(struct phy *phy)  in ma35_usb_phy_power_off()  argument
78 	struct ma35_usb_phy *p_phy = phy_get_drvdata(phy);  in ma35_usb_phy_power_off()
80 	clk_disable_unprepare(p_phy->clk);  in ma35_usb_phy_power_off()
94 	struct phy *phy;  in ma35_usb_phy_probe()  local
96 	p_phy = devm_kzalloc(&pdev->dev, sizeof(*p_phy), GFP_KERNEL);  in ma35_usb_phy_probe()
98 		return -ENOMEM;  in ma35_usb_phy_probe()
100 	p_phy->dev = &pdev->dev;  in ma35_usb_phy_probe()
103 	p_phy->sysreg = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "nuvoton,sys");  in ma35_usb_phy_probe()
104 	if (IS_ERR(p_phy->sysreg))  in ma35_usb_phy_probe()
105 		return dev_err_probe(&pdev->dev, PTR_ERR(p_phy->sysreg),  in ma35_usb_phy_probe()
108 	p_phy->clk = of_clk_get(pdev->dev.of_node, 0);  in ma35_usb_phy_probe()
109 	if (IS_ERR(p_phy->clk))  in ma35_usb_phy_probe()
110 		return dev_err_probe(&pdev->dev, PTR_ERR(p_phy->clk),  in ma35_usb_phy_probe()
113 	phy = devm_phy_create(&pdev->dev, NULL, &ma35_usb_phy_ops);  in ma35_usb_phy_probe()
114 	if (IS_ERR(phy))  in ma35_usb_phy_probe()
115 		return dev_err_probe(&pdev->dev, PTR_ERR(phy), "Failed to create PHY\n");  in ma35_usb_phy_probe()
117 	phy_set_drvdata(phy, p_phy);  in ma35_usb_phy_probe()
119 	provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);  in ma35_usb_phy_probe()
121 		return dev_err_probe(&pdev->dev, PTR_ERR(provider),  in ma35_usb_phy_probe()
122 				     "Failed to register PHY provider\n");  in ma35_usb_phy_probe()
127 	{ .compatible = "nuvoton,ma35d1-usb2-phy", },
135 		.name	= "ma35d1-usb2-phy",
141 MODULE_DESCRIPTION("Nuvoton ma35d1 USB2.0 PHY driver");
142 MODULE_AUTHOR("Hui-Ping Chen <hpchen0nvt@gmail.com>");