1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for cros-ec proximity sensor exposed through MKBP switch
27 	struct cros_ec_device *ec;  member
75 	msg->command = EC_CMD_MKBP_INFO;  in cros_ec_mkbp_proximity_query()
76 	msg->version = 1;  in cros_ec_mkbp_proximity_query()
77 	msg->outsize = sizeof(*params);  in cros_ec_mkbp_proximity_query()
78 	msg->insize = insize;  in cros_ec_mkbp_proximity_query()
80 	params->info_type = EC_MKBP_INFO_CURRENT;  in cros_ec_mkbp_proximity_query()
81 	params->event_type = EC_MKBP_EVENT_SWITCH;  in cros_ec_mkbp_proximity_query()
88 		dev_warn(ec_dev->dev, "wrong result size: %d != %zu\n", ret,  in cros_ec_mkbp_proximity_query()
90 		return -EPROTO;  in cros_ec_mkbp_proximity_query()
102 	struct iio_dev *indio_dev = data->indio_dev;  in cros_ec_mkbp_proximity_push_event()
103 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_push_event()  local
105 	mutex_lock(&data->lock);  in cros_ec_mkbp_proximity_push_event()
106 	if (state != data->last_proximity) {  in cros_ec_mkbp_proximity_push_event()
107 		if (data->enabled) {  in cros_ec_mkbp_proximity_push_event()
108 			timestamp = ktime_to_ns(ec->last_event_time);  in cros_ec_mkbp_proximity_push_event()
117 		data->last_proximity = state;  in cros_ec_mkbp_proximity_push_event()
119 	mutex_unlock(&data->lock);  in cros_ec_mkbp_proximity_push_event()
127 	struct cros_ec_device *ec = _ec;  in cros_ec_mkbp_proximity_notify()  local
128 	u8 event_type = ec->event_data.event_type & EC_MKBP_EVENT_TYPE_MASK;  in cros_ec_mkbp_proximity_notify()
136 		switches = &ec->event_data.data.switches;  in cros_ec_mkbp_proximity_notify()
149 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_read_raw()  local
151 	if (chan->type == IIO_PROXIMITY && mask == IIO_CHAN_INFO_RAW)  in cros_ec_mkbp_proximity_read_raw()
152 		return cros_ec_mkbp_proximity_query(ec, val);  in cros_ec_mkbp_proximity_read_raw()
154 	return -EINVAL;  in cros_ec_mkbp_proximity_read_raw()
164 	return data->enabled;  in cros_ec_mkbp_proximity_read_event_config()
174 	mutex_lock(&data->lock);  in cros_ec_mkbp_proximity_write_event_config()
175 	data->enabled = state;  in cros_ec_mkbp_proximity_write_event_config()
176 	mutex_unlock(&data->lock);  in cros_ec_mkbp_proximity_write_event_config()
190 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_resume()  local
193 	ret = cros_ec_mkbp_proximity_query(ec, &state);  in cros_ec_mkbp_proximity_resume()
209 	struct device *dev = &pdev->dev;  in cros_ec_mkbp_proximity_probe()
210 	struct cros_ec_device *ec = dev_get_drvdata(dev->parent);  in cros_ec_mkbp_proximity_probe()  local
217 		return -ENOMEM;  in cros_ec_mkbp_proximity_probe()
220 	data->ec = ec;  in cros_ec_mkbp_proximity_probe()
221 	data->indio_dev = indio_dev;  in cros_ec_mkbp_proximity_probe()
222 	data->last_proximity = -1; /* Unknown to start */  in cros_ec_mkbp_proximity_probe()
223 	mutex_init(&data->lock);  in cros_ec_mkbp_proximity_probe()
226 	indio_dev->name = dev->driver->name;  in cros_ec_mkbp_proximity_probe()
227 	indio_dev->info = &cros_ec_mkbp_proximity_info;  in cros_ec_mkbp_proximity_probe()
228 	indio_dev->modes = INDIO_DIRECT_MODE;  in cros_ec_mkbp_proximity_probe()
229 	indio_dev->channels = cros_ec_mkbp_proximity_chan_spec;  in cros_ec_mkbp_proximity_probe()
230 	indio_dev->num_channels = ARRAY_SIZE(cros_ec_mkbp_proximity_chan_spec);  in cros_ec_mkbp_proximity_probe()
236 	data->notifier.notifier_call = cros_ec_mkbp_proximity_notify;  in cros_ec_mkbp_proximity_probe()
237 	blocking_notifier_chain_register(&ec->event_notifier, &data->notifier);  in cros_ec_mkbp_proximity_probe()
245 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_remove()  local
247 	blocking_notifier_chain_unregister(&ec->event_notifier,  in cros_ec_mkbp_proximity_remove()
248 					   &data->notifier);  in cros_ec_mkbp_proximity_remove()
252 	{ .compatible = "google,cros-ec-mkbp-proximity" },
259 		.name = "cros-ec-mkbp-proximity",
269 MODULE_DESCRIPTION("ChromeOS EC MKBP proximity sensor driver");