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>
26 #define ACPI_ALS_DEVICE_NAME		"acpi-als"
29 ACPI_MODULE_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()
95 		return -EIO;  in acpi_als_read_value()
107 	s32 *buffer = als->evt_buffer;  in acpi_als_notify()
112 	mutex_lock(&als->lock);  in acpi_als_notify()
125 		dev_dbg(&device->dev, "Unhandled ACPI ALS event (%08x)!\n",  in acpi_als_notify()
130 	iio_push_to_buffers_with_timestamp(indio_dev, als->evt_buffer, time_ns);  in acpi_als_notify()
133 	mutex_unlock(&als->lock);  in acpi_als_notify()
145 		return -EINVAL;  in acpi_als_read_raw()
148 	if (chan->type != IIO_LIGHT)  in acpi_als_read_raw()
149 		return -EINVAL;  in acpi_als_read_raw()
170 	indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));  in acpi_als_add()
172 		return -ENOMEM;  in acpi_als_add()
176 	device->driver_data = indio_dev;  in acpi_als_add()
177 	als->device = device;  in acpi_als_add()
178 	mutex_init(&als->lock);  in acpi_als_add()
180 	indio_dev->name = ACPI_ALS_DEVICE_NAME;  in acpi_als_add()
181 	indio_dev->info = &acpi_als_info;  in acpi_als_add()
182 	indio_dev->modes = INDIO_BUFFER_SOFTWARE;  in acpi_als_add()
183 	indio_dev->channels = acpi_als_channels;  in acpi_als_add()
184 	indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);  in acpi_als_add()
186 	buffer = devm_iio_kfifo_allocate(&device->dev);  in acpi_als_add()
188 		return -ENOMEM;  in acpi_als_add()
192 	return devm_iio_device_register(&device->dev, indio_dev);  in acpi_als_add()