1 // SPDX-License-Identifier: GPL-2.0-only
3  * Maxim Integrated MAX3355 USB OTG chip extcon driver
5  * Copyright (C)  2014-2015 Cogent Embedded, Inc.
9 #include <linux/extcon-provider.h>
31 	int id = gpiod_get_value_cansleep(data->id_gpiod);  in max3355_id_irq()
35 		 * ID = 1 means USB HOST cable detached.  in max3355_id_irq()
36 		 * As we don't have event for USB peripheral cable attached,  in max3355_id_irq()
37 		 * we simulate USB peripheral attach here.  in max3355_id_irq()
39 		extcon_set_state_sync(data->edev, EXTCON_USB_HOST, false);  in max3355_id_irq()
40 		extcon_set_state_sync(data->edev, EXTCON_USB, true);  in max3355_id_irq()
43 		 * ID = 0 means USB HOST cable attached.  in max3355_id_irq()
44 		 * As we don't have event for USB peripheral cable detached,  in max3355_id_irq()
45 		 * we simulate USB peripheral detach here.  in max3355_id_irq()
47 		extcon_set_state_sync(data->edev, EXTCON_USB, false);  in max3355_id_irq()
48 		extcon_set_state_sync(data->edev, EXTCON_USB_HOST, true);  in max3355_id_irq()
60 	data = devm_kzalloc(&pdev->dev, sizeof(struct max3355_data),  in max3355_probe()
63 		return -ENOMEM;  in max3355_probe()
65 	gpiod = devm_gpiod_get(&pdev->dev, "id", GPIOD_IN);  in max3355_probe()
67 		dev_err(&pdev->dev, "failed to get ID_OUT GPIO\n");  in max3355_probe()
70 	data->id_gpiod = gpiod;  in max3355_probe()
72 	gpiod = devm_gpiod_get(&pdev->dev, "maxim,shdn", GPIOD_OUT_HIGH);  in max3355_probe()
74 		dev_err(&pdev->dev, "failed to get SHDN# GPIO\n");  in max3355_probe()
77 	data->shdn_gpiod = gpiod;  in max3355_probe()
79 	data->edev = devm_extcon_dev_allocate(&pdev->dev, max3355_cable);  in max3355_probe()
80 	if (IS_ERR(data->edev)) {  in max3355_probe()
81 		dev_err(&pdev->dev, "failed to allocate extcon device\n");  in max3355_probe()
82 		return PTR_ERR(data->edev);  in max3355_probe()
85 	err = devm_extcon_dev_register(&pdev->dev, data->edev);  in max3355_probe()
87 		dev_err(&pdev->dev, "failed to register extcon device\n");  in max3355_probe()
91 	irq = gpiod_to_irq(data->id_gpiod);  in max3355_probe()
93 		dev_err(&pdev->dev, "failed to translate ID_OUT GPIO to IRQ\n");  in max3355_probe()
97 	err = devm_request_threaded_irq(&pdev->dev, irq, NULL, max3355_id_irq,  in max3355_probe()
101 					pdev->name, data);  in max3355_probe()
103 		dev_err(&pdev->dev, "failed to request ID_OUT IRQ\n");  in max3355_probe()
119 	gpiod_set_value_cansleep(data->shdn_gpiod, 0);  in max3355_remove()
132 		.name	= "extcon-max3355",