phy/ti/phy-dm816x-usb.c

15 #include <linux/phy/phy.h>
23  * phy as being SR70LX Synopsys USB 2.0 OTG nanoPHY. It also seems at
33  * Finally, the phy on dm814x and am335x is different from dm816x.
36 #define DM816X_USB_CTRL_PHYSLEEP1	BIT(1)	/* Enable the first phy */
37 #define DM816X_USB_CTRL_PHYSLEEP0	BIT(0)	/* Enable the second phy */
48 	struct usb_phy phy;  member
72 static int dm816x_usb_phy_init(struct phy *x)  in dm816x_usb_phy_init()
74 	struct dm816x_usb_phy *phy = phy_get_drvdata(x);  in dm816x_usb_phy_init()  local
77 	if (clk_get_rate(phy->refclk) != 24000000)  in dm816x_usb_phy_init()
78 		dev_warn(phy->dev, "nonstandard phy refclk\n");  in dm816x_usb_phy_init()
81 	regmap_update_bits(phy->syscon, phy->usb_ctrl,  in dm816x_usb_phy_init()
86 	regmap_read(phy->syscon, phy->usb_ctrl, &val);  in dm816x_usb_phy_init()
88 		dev_info(phy->dev,  in dm816x_usb_phy_init()
97 	regmap_read(phy->syscon, phy->usbphy_ctrl, &val);  in dm816x_usb_phy_init()
101 	regmap_write(phy->syscon, phy->usbphy_ctrl, val);  in dm816x_usb_phy_init()
113 	struct dm816x_usb_phy *phy = dev_get_drvdata(dev);  in dm816x_usb_phy_runtime_suspend()  local
117 	mask = BIT(phy->instance);  in dm816x_usb_phy_runtime_suspend()
118 	val = ~BIT(phy->instance);  in dm816x_usb_phy_runtime_suspend()
119 	error = regmap_update_bits(phy->syscon, phy->usb_ctrl,  in dm816x_usb_phy_runtime_suspend()
122 		dev_err(phy->dev, "phy%i failed to power off\n",  in dm816x_usb_phy_runtime_suspend()
123 			phy->instance);  in dm816x_usb_phy_runtime_suspend()
124 	clk_disable(phy->refclk);  in dm816x_usb_phy_runtime_suspend()
131 	struct dm816x_usb_phy *phy = dev_get_drvdata(dev);  in dm816x_usb_phy_runtime_resume()  local
135 	error = clk_enable(phy->refclk);  in dm816x_usb_phy_runtime_resume()
145 	mask = BIT(phy->instance);  in dm816x_usb_phy_runtime_resume()
146 	val = BIT(phy->instance);  in dm816x_usb_phy_runtime_resume()
147 	error = regmap_update_bits(phy->syscon, phy->usb_ctrl,  in dm816x_usb_phy_runtime_resume()
150 		dev_err(phy->dev, "phy%i failed to power on\n",  in dm816x_usb_phy_runtime_resume()
151 			phy->instance);  in dm816x_usb_phy_runtime_resume()
152 		clk_disable(phy->refclk);  in dm816x_usb_phy_runtime_resume()
167 		.compatible = "ti,dm8168-usb-phy",
176 	struct dm816x_usb_phy *phy;  in dm816x_usb_phy_probe()  local
178 	struct phy *generic_phy;  in dm816x_usb_phy_probe()
189 	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);  in dm816x_usb_phy_probe()
190 	if (!phy)  in dm816x_usb_phy_probe()
197 	phy->syscon = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,  in dm816x_usb_phy_probe()
199 	if (IS_ERR(phy->syscon))  in dm816x_usb_phy_probe()
200 		return PTR_ERR(phy->syscon);  in dm816x_usb_phy_probe()
207 	phy->usb_ctrl = 0x20;  in dm816x_usb_phy_probe()
208 	phy->usbphy_ctrl = (res->start & 0xff) + 4;  in dm816x_usb_phy_probe()
209 	if (phy->usbphy_ctrl == 0x2c)  in dm816x_usb_phy_probe()
210 		phy->instance = 1;  in dm816x_usb_phy_probe()
216 	phy->dev = &pdev->dev;  in dm816x_usb_phy_probe()
217 	phy->phy.dev = phy->dev;  in dm816x_usb_phy_probe()
218 	phy->phy.label = "dm8168_usb_phy";  in dm816x_usb_phy_probe()
219 	phy->phy.otg = otg;  in dm816x_usb_phy_probe()
220 	phy->phy.type = USB_PHY_TYPE_USB2;  in dm816x_usb_phy_probe()
223 	otg->usb_phy = &phy->phy;  in dm816x_usb_phy_probe()
225 	platform_set_drvdata(pdev, phy);  in dm816x_usb_phy_probe()
227 	phy->refclk = devm_clk_get(phy->dev, "refclk");  in dm816x_usb_phy_probe()
228 	if (IS_ERR(phy->refclk))  in dm816x_usb_phy_probe()
229 		return PTR_ERR(phy->refclk);  in dm816x_usb_phy_probe()
230 	error = clk_prepare(phy->refclk);  in dm816x_usb_phy_probe()
234 	pm_runtime_enable(phy->dev);  in dm816x_usb_phy_probe()
235 	generic_phy = devm_phy_create(phy->dev, NULL, &ops);  in dm816x_usb_phy_probe()
241 	phy_set_drvdata(generic_phy, phy);  in dm816x_usb_phy_probe()
243 	phy_provider = devm_of_phy_provider_register(phy->dev,  in dm816x_usb_phy_probe()
250 	usb_add_phy_dev(&phy->phy);  in dm816x_usb_phy_probe()
255 	pm_runtime_disable(phy->dev);  in dm816x_usb_phy_probe()
256 	clk_unprepare(phy->refclk);  in dm816x_usb_phy_probe()
262 	struct dm816x_usb_phy *phy = platform_get_drvdata(pdev);  in dm816x_usb_phy_remove()  local
264 	usb_remove_phy(&phy->phy);  in dm816x_usb_phy_remove()
265 	pm_runtime_disable(phy->dev);  in dm816x_usb_phy_remove()
266 	clk_unprepare(phy->refclk);  in dm816x_usb_phy_remove()
273 		.name	= "dm816x-usb-phy",
283 MODULE_DESCRIPTION("dm816x usb phy driver");