1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <dt-bindings/phy/phy-pistachio-usb.h>
38 	unsigned int refclk;  member
59 	ret = clk_prepare_enable(p_phy->phy_clk);  in pistachio_usb_phy_power_on()
61 		dev_err(p_phy->dev, "Failed to enable PHY clock: %d\n", ret);  in pistachio_usb_phy_power_on()
65 	regmap_update_bits(p_phy->cr_top, USB_PHY_STRAP_CONTROL,  in pistachio_usb_phy_power_on()
68 			   p_phy->refclk << USB_PHY_STRAP_CONTROL_REFCLK_SHIFT);  in pistachio_usb_phy_power_on()
70 	rate = clk_get_rate(p_phy->phy_clk);  in pistachio_usb_phy_power_on()
71 	if (p_phy->refclk == REFCLK_XO_CRYSTAL && rate != 12000000) {  in pistachio_usb_phy_power_on()
72 		dev_err(p_phy->dev, "Unsupported rate for XO crystal: %ld\n",  in pistachio_usb_phy_power_on()
74 		ret = -EINVAL;  in pistachio_usb_phy_power_on()
83 		dev_err(p_phy->dev, "Unsupported clock rate: %lu\n", rate);  in pistachio_usb_phy_power_on()
84 		ret = -EINVAL;  in pistachio_usb_phy_power_on()
88 	regmap_update_bits(p_phy->cr_top, USB_PHY_CONTROL1,  in pistachio_usb_phy_power_on()
97 		regmap_read(p_phy->cr_top, USB_PHY_STATUS, &val);  in pistachio_usb_phy_power_on()
99 			dev_err(p_phy->dev, "VBUS fault detected\n");  in pistachio_usb_phy_power_on()
100 			ret = -EIO;  in pistachio_usb_phy_power_on()
109 	dev_err(p_phy->dev, "Timed out waiting for PHY to power on\n");  in pistachio_usb_phy_power_on()
110 	ret = -ETIMEDOUT;  in pistachio_usb_phy_power_on()
113 	clk_disable_unprepare(p_phy->phy_clk);  in pistachio_usb_phy_power_on()
121 	clk_disable_unprepare(p_phy->phy_clk);  in pistachio_usb_phy_power_off()
139 	p_phy = devm_kzalloc(&pdev->dev, sizeof(*p_phy), GFP_KERNEL);  in pistachio_usb_phy_probe()
141 		return -ENOMEM;  in pistachio_usb_phy_probe()
142 	p_phy->dev = &pdev->dev;  in pistachio_usb_phy_probe()
145 	p_phy->cr_top = syscon_regmap_lookup_by_phandle(p_phy->dev->of_node,  in pistachio_usb_phy_probe()
146 							"img,cr-top");  in pistachio_usb_phy_probe()
147 	if (IS_ERR(p_phy->cr_top)) {  in pistachio_usb_phy_probe()
148 		dev_err(p_phy->dev, "Failed to get CR_TOP registers: %ld\n",  in pistachio_usb_phy_probe()
149 			PTR_ERR(p_phy->cr_top));  in pistachio_usb_phy_probe()
150 		return PTR_ERR(p_phy->cr_top);  in pistachio_usb_phy_probe()
153 	p_phy->phy_clk = devm_clk_get(p_phy->dev, "usb_phy");  in pistachio_usb_phy_probe()
154 	if (IS_ERR(p_phy->phy_clk)) {  in pistachio_usb_phy_probe()
155 		dev_err(p_phy->dev, "Failed to get usb_phy clock: %ld\n",  in pistachio_usb_phy_probe()
156 			PTR_ERR(p_phy->phy_clk));  in pistachio_usb_phy_probe()
157 		return PTR_ERR(p_phy->phy_clk);  in pistachio_usb_phy_probe()
160 	ret = of_property_read_u32(p_phy->dev->of_node, "img,refclk",  in pistachio_usb_phy_probe()
161 				   &p_phy->refclk);  in pistachio_usb_phy_probe()
163 		dev_err(p_phy->dev, "No reference clock selector specified\n");  in pistachio_usb_phy_probe()
167 	phy = devm_phy_create(p_phy->dev, NULL, &pistachio_usb_phy_ops);  in pistachio_usb_phy_probe()
169 		dev_err(p_phy->dev, "Failed to create PHY: %ld\n",  in pistachio_usb_phy_probe()
175 	provider = devm_of_phy_provider_register(p_phy->dev,  in pistachio_usb_phy_probe()
178 		dev_err(p_phy->dev, "Failed to register PHY provider: %ld\n",  in pistachio_usb_phy_probe()
187 	{ .compatible = "img,pistachio-usb-phy", },
195 		.name	= "pistachio-usb-phy",