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
64 	struct ec_params_mkbp_info *params = (struct ec_params_mkbp_info *)buf->data;  in cros_ec_mkbp_proximity_query()
66 	u32 *switches = (u32 *)buf->data;  in cros_ec_mkbp_proximity_query()
70 	msg->command = EC_CMD_MKBP_INFO;  in cros_ec_mkbp_proximity_query()
71 	msg->version = 1;  in cros_ec_mkbp_proximity_query()
72 	msg->outsize = sizeof(*params);  in cros_ec_mkbp_proximity_query()
73 	msg->insize = insize;  in cros_ec_mkbp_proximity_query()
75 	params->info_type = EC_MKBP_INFO_CURRENT;  in cros_ec_mkbp_proximity_query()
76 	params->event_type = EC_MKBP_EVENT_SWITCH;  in cros_ec_mkbp_proximity_query()
83 		dev_warn(ec_dev->dev, "wrong result size: %d != %zu\n", ret,  in cros_ec_mkbp_proximity_query()
85 		return -EPROTO;  in cros_ec_mkbp_proximity_query()
97 	struct iio_dev *indio_dev = data->indio_dev;  in cros_ec_mkbp_proximity_push_event()
98 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_push_event()  local
100 	mutex_lock(&data->lock);  in cros_ec_mkbp_proximity_push_event()
101 	if (state != data->last_proximity) {  in cros_ec_mkbp_proximity_push_event()
102 		if (data->enabled) {  in cros_ec_mkbp_proximity_push_event()
103 			timestamp = ktime_to_ns(ec->last_event_time);  in cros_ec_mkbp_proximity_push_event()
112 		data->last_proximity = state;  in cros_ec_mkbp_proximity_push_event()
114 	mutex_unlock(&data->lock);  in cros_ec_mkbp_proximity_push_event()
122 	struct cros_ec_device *ec = _ec;  in cros_ec_mkbp_proximity_notify()  local
123 	u8 event_type = ec->event_data.event_type & EC_MKBP_EVENT_TYPE_MASK;  in cros_ec_mkbp_proximity_notify()
131 		switches = &ec->event_data.data.switches;  in cros_ec_mkbp_proximity_notify()
144 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_read_raw()  local
146 	if (chan->type == IIO_PROXIMITY && mask == IIO_CHAN_INFO_RAW)  in cros_ec_mkbp_proximity_read_raw()
147 		return cros_ec_mkbp_proximity_query(ec, val);  in cros_ec_mkbp_proximity_read_raw()
149 	return -EINVAL;  in cros_ec_mkbp_proximity_read_raw()
159 	return data->enabled;  in cros_ec_mkbp_proximity_read_event_config()
169 	mutex_lock(&data->lock);  in cros_ec_mkbp_proximity_write_event_config()
170 	data->enabled = state;  in cros_ec_mkbp_proximity_write_event_config()
171 	mutex_unlock(&data->lock);  in cros_ec_mkbp_proximity_write_event_config()
185 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_resume()  local
188 	ret = cros_ec_mkbp_proximity_query(ec, &state);  in cros_ec_mkbp_proximity_resume()
204 	struct device *dev = &pdev->dev;  in cros_ec_mkbp_proximity_probe()
205 	struct cros_ec_device *ec = dev_get_drvdata(dev->parent);  in cros_ec_mkbp_proximity_probe()  local
212 		return -ENOMEM;  in cros_ec_mkbp_proximity_probe()
215 	data->ec = ec;  in cros_ec_mkbp_proximity_probe()
216 	data->indio_dev = indio_dev;  in cros_ec_mkbp_proximity_probe()
217 	data->last_proximity = -1; /* Unknown to start */  in cros_ec_mkbp_proximity_probe()
218 	mutex_init(&data->lock);  in cros_ec_mkbp_proximity_probe()
221 	indio_dev->name = dev->driver->name;  in cros_ec_mkbp_proximity_probe()
222 	indio_dev->info = &cros_ec_mkbp_proximity_info;  in cros_ec_mkbp_proximity_probe()
223 	indio_dev->modes = INDIO_DIRECT_MODE;  in cros_ec_mkbp_proximity_probe()
224 	indio_dev->channels = cros_ec_mkbp_proximity_chan_spec;  in cros_ec_mkbp_proximity_probe()
225 	indio_dev->num_channels = ARRAY_SIZE(cros_ec_mkbp_proximity_chan_spec);  in cros_ec_mkbp_proximity_probe()
231 	data->notifier.notifier_call = cros_ec_mkbp_proximity_notify;  in cros_ec_mkbp_proximity_probe()
232 	blocking_notifier_chain_register(&ec->event_notifier, &data->notifier);  in cros_ec_mkbp_proximity_probe()
240 	struct cros_ec_device *ec = data->ec;  in cros_ec_mkbp_proximity_remove()  local
242 	blocking_notifier_chain_unregister(&ec->event_notifier,  in cros_ec_mkbp_proximity_remove()
243 					   &data->notifier);  in cros_ec_mkbp_proximity_remove()
247 	{ .compatible = "google,cros-ec-mkbp-proximity" },
254 		.name = "cros-ec-mkbp-proximity",
264 MODULE_DESCRIPTION("ChromeOS EC MKBP proximity sensor driver");