1 // SPDX-License-Identifier: GPL-2.0-or-later
9  * Copyright (C) 2012-2013 Martin Liska <marxin.liska@gmail.com>
12  * Copyright (C) 2013-2014 Marek Vasut <marex@denx.de>
29 #define ACPI_ALS_DEVICE_NAME		"acpi-als"
73  * The _ALR property returns tables that can be used to fine-tune the values
90 	status = acpi_evaluate_integer(als->device->handle, prop, NULL,  in acpi_als_read_value()
94 		acpi_evaluation_failure_warn(als->device->handle, prop, status);  in acpi_als_read_value()
95 		return -EIO;  in acpi_als_read_value()
111 			iio_trigger_poll_nested(als->trig);  in acpi_als_notify()
115 			dev_dbg(&device->dev,  in acpi_als_notify()
131 		return -EINVAL;  in acpi_als_read_raw()
134 	if (chan->type != IIO_LIGHT)  in acpi_als_read_raw()
135 		return -EINVAL;  in acpi_als_read_raw()
153 	struct iio_dev *indio_dev = pf->indio_dev;  in acpi_als_trigger_handler()
155 	s32 *buffer = als->evt_buffer;  in acpi_als_trigger_handler()
159 	mutex_lock(&als->lock);  in acpi_als_trigger_handler()
174 	if (!pf->timestamp)  in acpi_als_trigger_handler()
175 		pf->timestamp = iio_get_time_ns(indio_dev);  in acpi_als_trigger_handler()
177 	iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp);  in acpi_als_trigger_handler()
179 	mutex_unlock(&als->lock);  in acpi_als_trigger_handler()
180 	iio_trigger_notify_done(indio_dev->trig);  in acpi_als_trigger_handler()
187 	struct device *dev = &device->dev;  in acpi_als_add()
194 		return -ENOMEM;  in acpi_als_add()
198 	device->driver_data = indio_dev;  in acpi_als_add()
199 	als->device = device;  in acpi_als_add()
200 	mutex_init(&als->lock);  in acpi_als_add()
202 	indio_dev->name = ACPI_ALS_DEVICE_NAME;  in acpi_als_add()
203 	indio_dev->info = &acpi_als_info;  in acpi_als_add()
204 	indio_dev->channels = acpi_als_channels;  in acpi_als_add()
205 	indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);  in acpi_als_add()
207 	als->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,  in acpi_als_add()
209 	if (!als->trig)  in acpi_als_add()
210 		return -ENOMEM;  in acpi_als_add()
212 	ret = devm_iio_trigger_register(dev, als->trig);  in acpi_als_add()
219 	indio_dev->trig = iio_trigger_get(als->trig);  in acpi_als_add()