1 // SPDX-License-Identifier: GPL-2.0-only
5  * STMicroelectronics Generic PHY driver for STiH407 USB2.
19 #include <linux/phy/phy.h>
33 	struct phy *phy;  member
44 	reset_control_deassert(phy_dev->rstc);  in stih407_usb2_pico_ctrl()
46 	return regmap_update_bits(phy_dev->regmap, phy_dev->ctrl,  in stih407_usb2_pico_ctrl()
51 static int stih407_usb2_init_port(struct phy *phy)  in stih407_usb2_init_port()  argument
54 	struct stih407_usb2_picophy *phy_dev = phy_get_drvdata(phy);  in stih407_usb2_init_port()
58 	ret = regmap_update_bits(phy_dev->regmap,  in stih407_usb2_init_port()
59 				 phy_dev->param,  in stih407_usb2_init_port()
65 	return reset_control_deassert(phy_dev->rstport);  in stih407_usb2_init_port()
68 static int stih407_usb2_exit_port(struct phy *phy)  in stih407_usb2_exit_port()  argument
70 	struct stih407_usb2_picophy *phy_dev = phy_get_drvdata(phy);  in stih407_usb2_exit_port()
73 	 * Only port reset is asserted, phy global reset is kept untouched  in stih407_usb2_exit_port()
75 	 * state, assumption is made that power will be cut off on the phy, in  in stih407_usb2_exit_port()
79 	return reset_control_assert(phy_dev->rstport);  in stih407_usb2_exit_port()
91 	struct device *dev = &pdev->dev;  in stih407_usb2_picophy_probe()
92 	struct device_node *np = dev->of_node;  in stih407_usb2_picophy_probe()
94 	struct phy *phy;  in stih407_usb2_picophy_probe()  local
99 		return -ENOMEM;  in stih407_usb2_picophy_probe()
101 	phy_dev->dev = dev;  in stih407_usb2_picophy_probe()
104 	phy_dev->rstc = devm_reset_control_get_shared(dev, "global");  in stih407_usb2_picophy_probe()
105 	if (IS_ERR(phy_dev->rstc)) {  in stih407_usb2_picophy_probe()
107 		return PTR_ERR(phy_dev->rstc);  in stih407_usb2_picophy_probe()
110 	phy_dev->rstport = devm_reset_control_get_exclusive(dev, "port");  in stih407_usb2_picophy_probe()
111 	if (IS_ERR(phy_dev->rstport)) {  in stih407_usb2_picophy_probe()
113 		return PTR_ERR(phy_dev->rstport);  in stih407_usb2_picophy_probe()
116 	/* Reset port by default: only deassert it in phy init */  in stih407_usb2_picophy_probe()
117 	reset_control_assert(phy_dev->rstport);  in stih407_usb2_picophy_probe()
119 	phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");  in stih407_usb2_picophy_probe()
120 	if (IS_ERR(phy_dev->regmap)) {  in stih407_usb2_picophy_probe()
122 		return PTR_ERR(phy_dev->regmap);  in stih407_usb2_picophy_probe()
126 					&phy_dev->param);  in stih407_usb2_picophy_probe()
133 					&phy_dev->ctrl);  in stih407_usb2_picophy_probe()
139 	phy = devm_phy_create(dev, NULL, &stih407_usb2_picophy_data);  in stih407_usb2_picophy_probe()
140 	if (IS_ERR(phy)) {  in stih407_usb2_picophy_probe()
141 		dev_err(dev, "failed to create Display Port PHY\n");  in stih407_usb2_picophy_probe()
142 		return PTR_ERR(phy);  in stih407_usb2_picophy_probe()
145 	phy_dev->phy = phy;  in stih407_usb2_picophy_probe()
146 	phy_set_drvdata(phy, phy_dev);  in stih407_usb2_picophy_probe()
152 	dev_info(dev, "STiH407 USB Generic picoPHY driver probed!");  in stih407_usb2_picophy_probe()
158 	{ .compatible = "st,stih407-usb2-phy" },
167 		   .name = "stih407-usb-genphy",
175 MODULE_DESCRIPTION("STMicroelectronics Generic picoPHY driver for STiH407");