1 // SPDX-License-Identifier: GPL-2.0
3  * drivers/extcon/extcon-tusb320.c - TUSB320 extcon driver
9 #include <linux/extcon-provider.h>
35 	[TUSB320_ATTACHED_STATE_DFP]  = "downstream facing port",
36 	[TUSB320_ATTACHED_STATE_UFP]  = "upstream facing port",
48 	static const char sig[] = { '\0', 'T', 'U', 'S', 'B', '3', '2', '0' };  in tusb320_check_signature()
53 		ret = regmap_read(priv->regmap, sizeof(sig) - 1 - i, &val);  in tusb320_check_signature()
57 			dev_err(priv->dev, "signature mismatch!\n");  in tusb320_check_signature()
58 			return -ENODEV;  in tusb320_check_signature()
71 	if (regmap_read(priv->regmap, TUSB320_REG9, &reg)) {  in tusb320_irq_handler()
72 		dev_err(priv->dev, "error during i2c read!\n");  in tusb320_irq_handler()
83 	dev_dbg(priv->dev, "attached state: %s, polarity: %d\n",  in tusb320_irq_handler()
86 	extcon_set_state(priv->edev, EXTCON_USB,  in tusb320_irq_handler()
88 	extcon_set_state(priv->edev, EXTCON_USB_HOST,  in tusb320_irq_handler()
90 	extcon_set_property(priv->edev, EXTCON_USB,  in tusb320_irq_handler()
93 	extcon_set_property(priv->edev, EXTCON_USB_HOST,  in tusb320_irq_handler()
96 	extcon_sync(priv->edev, EXTCON_USB);  in tusb320_irq_handler()
97 	extcon_sync(priv->edev, EXTCON_USB_HOST);  in tusb320_irq_handler()
99 	regmap_write(priv->regmap, TUSB320_REG9, reg);  in tusb320_irq_handler()
115 	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);  in tusb320_extcon_probe()
117 		return -ENOMEM;  in tusb320_extcon_probe()
118 	priv->dev = &client->dev;  in tusb320_extcon_probe()
120 	priv->regmap = devm_regmap_init_i2c(client, &tusb320_regmap_config);  in tusb320_extcon_probe()
121 	if (IS_ERR(priv->regmap))  in tusb320_extcon_probe()
122 		return PTR_ERR(priv->regmap);  in tusb320_extcon_probe()
128 	priv->edev = devm_extcon_dev_allocate(priv->dev, tusb320_extcon_cable);  in tusb320_extcon_probe()
129 	if (IS_ERR(priv->edev)) {  in tusb320_extcon_probe()
130 		dev_err(priv->dev, "failed to allocate extcon device\n");  in tusb320_extcon_probe()
131 		return PTR_ERR(priv->edev);  in tusb320_extcon_probe()
134 	ret = devm_extcon_dev_register(priv->dev, priv->edev);  in tusb320_extcon_probe()
136 		dev_err(priv->dev, "failed to register extcon device\n");  in tusb320_extcon_probe()
140 	extcon_set_property_capability(priv->edev, EXTCON_USB,  in tusb320_extcon_probe()
142 	extcon_set_property_capability(priv->edev, EXTCON_USB_HOST,  in tusb320_extcon_probe()
146 	tusb320_irq_handler(client->irq, priv);  in tusb320_extcon_probe()
148 	ret = devm_request_threaded_irq(priv->dev, client->irq, NULL,  in tusb320_extcon_probe()
151 					client->name, priv);  in tusb320_extcon_probe()
165 		.name	= "extcon-tusb320",