// SPDX-License-Identifier: GPL-2.0-or-later /* * ACPI Ambient Light Sensor Driver * * Based on ALS driver: * Copyright (C) 2009 Zhang Rui <[email protected]> * * Rework for IIO subsystem: * Copyright (C) 2012-2013 Martin Liska <[email protected]> * * Final cleanup and debugging: * Copyright (C) 2013-2014 Marek Vasut <[email protected]> * Copyright (C) 2015 Gabriele Mazzotta <[email protected]> */ #include <linux/module.h> #include <linux/acpi.h> #include <linux/err.h> #include <linux/irq.h> #include <linux/mutex.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/trigger_consumer.h> #define ACPI_ALS_CLASS … #define ACPI_ALS_DEVICE_NAME … #define ACPI_ALS_NOTIFY_ILLUMINANCE … /* * So far, there's only one channel in here, but the specification for * ACPI0008 says there can be more to what the block can report. Like * chromaticity and such. We are ready for incoming additions! */ static const struct iio_chan_spec acpi_als_channels[] = …; /* * The event buffer contains timestamp and all the data from * the ACPI0008 block. There are multiple, but so far we only * support _ALI (illuminance): One channel, padding and timestamp. */ #define ACPI_ALS_EVT_BUFFER_SIZE … struct acpi_als { … }; /* * All types of properties the ACPI0008 block can report. The ALI, ALC, ALT * and ALP can all be handled by acpi_als_read_value() below, while the ALR is * special. * * The _ALR property returns tables that can be used to fine-tune the values * reported by the other props based on the particular hardware type and it's * location (it contains tables for "rainy", "bright inhouse lighting" etc.). * * So far, we support only ALI (illuminance). */ #define ACPI_ALS_ILLUMINANCE … #define ACPI_ALS_CHROMATICITY … #define ACPI_ALS_COLOR_TEMP … #define ACPI_ALS_POLLING … #define ACPI_ALS_TABLES … static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val) { … } static void acpi_als_notify(struct acpi_device *device, u32 event) { … } static int acpi_als_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static const struct iio_info acpi_als_info = …; static irqreturn_t acpi_als_trigger_handler(int irq, void *p) { … } static int acpi_als_add(struct acpi_device *device) { … } static const struct acpi_device_id acpi_als_device_ids[] = …; MODULE_DEVICE_TABLE(acpi, acpi_als_device_ids); static struct acpi_driver acpi_als_driver = …; module_acpi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux