Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * ACPI Ambient Light Sensor Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Based on ALS driver:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2009 Zhang Rui <rui.zhang@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Rework for IIO subsystem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Copyright (C) 2012-2013 Martin Liska <marxin.liska@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * Final cleanup and debugging:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Copyright (C) 2013-2014 Marek Vasut <marex@denx.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Copyright (C) 2015 Gabriele Mazzotta <gabriele.mzt@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/iio/buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/iio/kfifo_buf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define ACPI_ALS_CLASS			"als"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define ACPI_ALS_DEVICE_NAME		"acpi-als"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define ACPI_ALS_NOTIFY_ILLUMINANCE	0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) ACPI_MODULE_NAME("acpi-als");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * So far, there's only one channel in here, but the specification for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  * ACPI0008 says there can be more to what the block can report. Like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * chromaticity and such. We are ready for incoming additions!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static const struct iio_chan_spec acpi_als_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		.type		= IIO_LIGHT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		.scan_type	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 			.sign		= 's',
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 			.realbits	= 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 			.storagebits	= 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		/* _RAW is here for backward ABI compatibility */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		.info_mask_separate	= BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 					  BIT(IIO_CHAN_INFO_PROCESSED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  * The event buffer contains timestamp and all the data from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  * the ACPI0008 block. There are multiple, but so far we only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  * support _ALI (illuminance). Once someone adds new channels
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * to acpi_als_channels[], the evt_buffer below will grow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * automatically.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define ACPI_ALS_EVT_NR_SOURCES		ARRAY_SIZE(acpi_als_channels)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define ACPI_ALS_EVT_BUFFER_SIZE		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	(sizeof(s64) + (ACPI_ALS_EVT_NR_SOURCES * sizeof(s32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) struct acpi_als {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct acpi_device	*device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	struct mutex		lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	s32			evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * All types of properties the ACPI0008 block can report. The ALI, ALC, ALT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  * and ALP can all be handled by acpi_als_read_value() below, while the ALR is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  * special.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * The _ALR property returns tables that can be used to fine-tune the values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  * reported by the other props based on the particular hardware type and it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  * location (it contains tables for "rainy", "bright inhouse lighting" etc.).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * So far, we support only ALI (illuminance).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #define ACPI_ALS_ILLUMINANCE	"_ALI"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #define ACPI_ALS_CHROMATICITY	"_ALC"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define ACPI_ALS_COLOR_TEMP	"_ALT"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #define ACPI_ALS_POLLING	"_ALP"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #define ACPI_ALS_TABLES		"_ALR"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	unsigned long long temp_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	status = acpi_evaluate_integer(als->device->handle, prop, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 				       &temp_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		ACPI_EXCEPTION((AE_INFO, status, "Error reading ALS %s", prop));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	*val = temp_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static void acpi_als_notify(struct acpi_device *device, u32 event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct iio_dev *indio_dev = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct acpi_als *als = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	s32 *buffer = als->evt_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	s64 time_ns = iio_get_time_ns(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	s32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	mutex_lock(&als->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	memset(buffer, 0, ACPI_ALS_EVT_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	case ACPI_ALS_NOTIFY_ILLUMINANCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		*buffer++ = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		/* Unhandled event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		dev_dbg(&device->dev, "Unhandled ACPI ALS event (%08x)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	iio_push_to_buffers_with_timestamp(indio_dev, als->evt_buffer, time_ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	mutex_unlock(&als->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static int acpi_als_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			     struct iio_chan_spec const *chan, int *val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			     int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	struct acpi_als *als = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	s32 temp_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if ((mask != IIO_CHAN_INFO_PROCESSED) && (mask != IIO_CHAN_INFO_RAW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	/* we support only illumination (_ALI) so far. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (chan->type != IIO_LIGHT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	*val = temp_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static const struct iio_info acpi_als_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	.read_raw		= acpi_als_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int acpi_als_add(struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	struct acpi_als *als;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	struct iio_buffer *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	als = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	device->driver_data = indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	als->device = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	mutex_init(&als->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	indio_dev->name = ACPI_ALS_DEVICE_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	indio_dev->info = &acpi_als_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	indio_dev->modes = INDIO_BUFFER_SOFTWARE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	indio_dev->channels = acpi_als_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	buffer = devm_iio_kfifo_allocate(&device->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	iio_device_attach_buffer(indio_dev, buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return devm_iio_device_register(&device->dev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static const struct acpi_device_id acpi_als_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	{"ACPI0008", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) MODULE_DEVICE_TABLE(acpi, acpi_als_device_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static struct acpi_driver acpi_als_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	.name	= "acpi_als",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	.class	= ACPI_ALS_CLASS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	.ids	= acpi_als_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	.ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		.add	= acpi_als_add,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		.notify	= acpi_als_notify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) module_acpi_driver(acpi_als_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) MODULE_AUTHOR("Martin Liska <marxin.liska@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) MODULE_DESCRIPTION("ACPI Ambient Light Sensor Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) MODULE_LICENSE("GPL");