1 // SPDX-License-Identifier: GPL-2.0+
3  * extcon-fsa9480.c - Fairchild Semiconductor FSA9480 extcon driver
7  * Loosely based on old fsa9480 misc-device driver.
20 #include <linux/extcon-provider.h>
86  * D- [7:5] / D+ [4:2]
87  * 000: Open all / 001: USB / 010: AUDIO / 011: UART / 100: V_AUDIO
169 	ret = regmap_write(usbsw->regmap, reg, value);  in fsa9480_write_reg()
171 		dev_err(usbsw->dev, "%s: err %d\n", __func__, ret);  in fsa9480_write_reg()
180 	ret = regmap_read(usbsw->regmap, reg, &val);  in fsa9480_read_reg()
182 		dev_err(usbsw->dev, "%s: err %d\n", __func__, ret);  in fsa9480_read_reg()
194 	ret = regmap_bulk_read(usbsw->regmap, FSA9480_REG_INT1, regs, 2);  in fsa9480_read_irq()
196 		dev_err(usbsw->dev, "%s: err %d\n", __func__, ret);  in fsa9480_read_irq()
203 				  u16 mask, bool attached)  in fsa9480_handle_change()  argument
206 		int dev = fls64(mask) - 1;  in fsa9480_handle_change()
210 			int cable = fls64(cables) - 1;  in fsa9480_handle_change()
212 			extcon_set_state_sync(usbsw->edev, cable, attached);  in fsa9480_handle_change()
228 		dev_err(usbsw->dev, "%s: failed to read registers", __func__);  in fsa9480_detect_dev()
233 	dev_info(usbsw->dev, "dev1: 0x%x, dev2: 0x%x\n", val1, val2);  in fsa9480_detect_dev()
236 	fsa9480_handle_change(usbsw, usbsw->cable & ~val, false);  in fsa9480_detect_dev()
238 	/* then handle attached ones */  in fsa9480_detect_dev()
239 	fsa9480_handle_change(usbsw, val & ~usbsw->cable, true);  in fsa9480_detect_dev()
241 	usbsw->cable = val;  in fsa9480_detect_dev()
266 	if (!client->irq) {  in fsa9480_probe()
267 		dev_err(&client->dev, "no interrupt provided\n");  in fsa9480_probe()
268 		return -EINVAL;  in fsa9480_probe()
271 	info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);  in fsa9480_probe()
273 		return -ENOMEM;  in fsa9480_probe()
274 	info->dev = &client->dev;  in fsa9480_probe()
279 	info->edev = devm_extcon_dev_allocate(info->dev,  in fsa9480_probe()
281 	if (IS_ERR(info->edev)) {  in fsa9480_probe()
282 		dev_err(info->dev, "failed to allocate memory for extcon\n");  in fsa9480_probe()
283 		ret = -ENOMEM;  in fsa9480_probe()
287 	ret = devm_extcon_dev_register(info->dev, info->edev);  in fsa9480_probe()
289 		dev_err(info->dev, "failed to register extcon device\n");  in fsa9480_probe()
293 	info->regmap = devm_regmap_init_i2c(client, &fsa9480_regmap_config);  in fsa9480_probe()
294 	if (IS_ERR(info->regmap)) {  in fsa9480_probe()
295 		ret = PTR_ERR(info->regmap);  in fsa9480_probe()
296 		dev_err(info->dev, "failed to allocate register map: %d\n",  in fsa9480_probe()
312 	ret = devm_request_threaded_irq(info->dev, client->irq, NULL,  in fsa9480_probe()
317 		dev_err(info->dev, "failed to request IRQ\n");  in fsa9480_probe()
321 	device_init_wakeup(info->dev, true);  in fsa9480_probe()
332 	if (device_may_wakeup(&client->dev) && client->irq)  in fsa9480_suspend()
333 		enable_irq_wake(client->irq);  in fsa9480_suspend()
342 	if (device_may_wakeup(&client->dev) && client->irq)  in fsa9480_resume()
343 		disable_irq_wake(client->irq);  in fsa9480_resume()