1 // SPDX-License-Identifier: GPL-2.0-only
3  * drivers/extcon/extcon-adc-jack.c
5  * Analog Jack extcon driver with ADC-based detection capability.
13  * Modified for calling to IIO to get adc by <anish.singh@samsung.com>
24 #include <linux/extcon/extcon-adc-jack.h>
25 #include <linux/extcon-provider.h>
28  * struct adc_jack_data - internal data for adc_jack device driver
31  * @adc_conditions:	list of adc value conditions.
37  * @chan:		iio channel being queried.
51 	struct iio_channel *chan;  member
64 	ret = iio_read_channel_raw(data->chan, &adc_val);  in adc_jack_handler()
66 		dev_err(data->dev, "read channel() error: %d\n", ret);  in adc_jack_handler()
70 	/* Get state from adc value with adc_conditions */  in adc_jack_handler()
71 	for (i = 0; i < data->num_conditions; i++) {  in adc_jack_handler()
72 		def = &data->adc_conditions[i];  in adc_jack_handler()
73 		if (def->min_adc <= adc_val && def->max_adc >= adc_val) {  in adc_jack_handler()
74 			extcon_set_state_sync(data->edev, def->id, true);  in adc_jack_handler()
79 	/* Set the detached state if adc value is not included in the range */  in adc_jack_handler()
80 	for (i = 0; i < data->num_conditions; i++) {  in adc_jack_handler()
81 		def = &data->adc_conditions[i];  in adc_jack_handler()
82 		extcon_set_state_sync(data->edev, def->id, false);  in adc_jack_handler()
91 			   &data->handler, data->handling_delay);  in adc_jack_irq_thread()
98 	struct adc_jack_pdata *pdata = dev_get_platdata(&pdev->dev);  in adc_jack_probe()
101 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in adc_jack_probe()
103 		return -ENOMEM;  in adc_jack_probe()
105 	if (!pdata->cable_names) {  in adc_jack_probe()
106 		dev_err(&pdev->dev, "error: cable_names not defined.\n");  in adc_jack_probe()
107 		return -EINVAL;  in adc_jack_probe()
110 	data->dev = &pdev->dev;  in adc_jack_probe()
111 	data->edev = devm_extcon_dev_allocate(&pdev->dev, pdata->cable_names);  in adc_jack_probe()
112 	if (IS_ERR(data->edev)) {  in adc_jack_probe()
113 		dev_err(&pdev->dev, "failed to allocate extcon device\n");  in adc_jack_probe()
114 		return -ENOMEM;  in adc_jack_probe()
117 	if (!pdata->adc_conditions) {  in adc_jack_probe()
118 		dev_err(&pdev->dev, "error: adc_conditions not defined.\n");  in adc_jack_probe()
119 		return -EINVAL;  in adc_jack_probe()
121 	data->adc_conditions = pdata->adc_conditions;  in adc_jack_probe()
124 	for (i = 0; data->adc_conditions[i].id != EXTCON_NONE; i++);  in adc_jack_probe()
125 	data->num_conditions = i;  in adc_jack_probe()
127 	data->chan = devm_iio_channel_get(&pdev->dev, pdata->consumer_channel);  in adc_jack_probe()
128 	if (IS_ERR(data->chan))  in adc_jack_probe()
129 		return PTR_ERR(data->chan);  in adc_jack_probe()
131 	data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms);  in adc_jack_probe()
132 	data->wakeup_source = pdata->wakeup_source;  in adc_jack_probe()
134 	INIT_DEFERRABLE_WORK(&data->handler, adc_jack_handler);  in adc_jack_probe()
138 	err = devm_extcon_dev_register(&pdev->dev, data->edev);  in adc_jack_probe()
142 	data->irq = platform_get_irq(pdev, 0);  in adc_jack_probe()
143 	if (data->irq < 0)  in adc_jack_probe()
144 		return -ENODEV;  in adc_jack_probe()
146 	err = request_any_context_irq(data->irq, adc_jack_irq_thread,  in adc_jack_probe()
147 			pdata->irq_flags, pdata->name, data);  in adc_jack_probe()
150 		dev_err(&pdev->dev, "error: irq %d\n", data->irq);  in adc_jack_probe()
154 	if (data->wakeup_source)  in adc_jack_probe()
155 		device_init_wakeup(&pdev->dev, 1);  in adc_jack_probe()
157 	adc_jack_handler(&data->handler.work);  in adc_jack_probe()
165 	free_irq(data->irq, data);  in adc_jack_remove()
166 	cancel_work_sync(&data->handler.work);  in adc_jack_remove()
176 	cancel_delayed_work_sync(&data->handler);  in adc_jack_suspend()
177 	if (device_may_wakeup(data->dev))  in adc_jack_suspend()
178 		enable_irq_wake(data->irq);  in adc_jack_suspend()
187 	if (device_may_wakeup(data->dev))  in adc_jack_resume()
188 		disable_irq_wake(data->irq);  in adc_jack_resume()
201 		.name   = "adc-jack",
209 MODULE_DESCRIPTION("ADC Jack extcon driver");