acpi-als.c (94e17d606ec9a4c3af7421b79e4fb235d07861b4) acpi-als.c (17395ce299211a8148ee45d1d71eb740a3fec48d)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ACPI Ambient Light Sensor Driver
4 *
5 * Based on ALS driver:
6 * Copyright (C) 2009 Zhang Rui <rui.zhang@intel.com>
7 *
8 * Rework for IIO subsystem:

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21#include <linux/iio/iio.h>
22#include <linux/iio/buffer.h>
23#include <linux/iio/kfifo_buf.h>
24
25#define ACPI_ALS_CLASS "als"
26#define ACPI_ALS_DEVICE_NAME "acpi-als"
27#define ACPI_ALS_NOTIFY_ILLUMINANCE 0x80
28
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ACPI Ambient Light Sensor Driver
4 *
5 * Based on ALS driver:
6 * Copyright (C) 2009 Zhang Rui <rui.zhang@intel.com>
7 *
8 * Rework for IIO subsystem:

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21#include <linux/iio/iio.h>
22#include <linux/iio/buffer.h>
23#include <linux/iio/kfifo_buf.h>
24
25#define ACPI_ALS_CLASS "als"
26#define ACPI_ALS_DEVICE_NAME "acpi-als"
27#define ACPI_ALS_NOTIFY_ILLUMINANCE 0x80
28
29ACPI_MODULE_NAME("acpi-als");
30
29/*
30 * So far, there's only one channel in here, but the specification for
31 * ACPI0008 says there can be more to what the block can report. Like
32 * chromaticity and such. We are ready for incoming additions!
33 */
34static const struct iio_chan_spec acpi_als_channels[] = {
35 {
36 .type = IIO_LIGHT,

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84{
85 unsigned long long temp_val;
86 acpi_status status;
87
88 status = acpi_evaluate_integer(als->device->handle, prop, NULL,
89 &temp_val);
90
91 if (ACPI_FAILURE(status)) {
31/*
32 * So far, there's only one channel in here, but the specification for
33 * ACPI0008 says there can be more to what the block can report. Like
34 * chromaticity and such. We are ready for incoming additions!
35 */
36static const struct iio_chan_spec acpi_als_channels[] = {
37 {
38 .type = IIO_LIGHT,

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86{
87 unsigned long long temp_val;
88 acpi_status status;
89
90 status = acpi_evaluate_integer(als->device->handle, prop, NULL,
91 &temp_val);
92
93 if (ACPI_FAILURE(status)) {
92 acpi_evaluation_failure_warn(als->device->handle, prop, status);
94 ACPI_EXCEPTION((AE_INFO, status, "Error reading ALS %s", prop));
93 return -EIO;
94 }
95
96 *val = temp_val;
97
98 return 0;
99}
100

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158static const struct iio_info acpi_als_info = {
159 .read_raw = acpi_als_read_raw,
160};
161
162static int acpi_als_add(struct acpi_device *device)
163{
164 struct acpi_als *als;
165 struct iio_dev *indio_dev;
95 return -EIO;
96 }
97
98 *val = temp_val;
99
100 return 0;
101}
102

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160static const struct iio_info acpi_als_info = {
161 .read_raw = acpi_als_read_raw,
162};
163
164static int acpi_als_add(struct acpi_device *device)
165{
166 struct acpi_als *als;
167 struct iio_dev *indio_dev;
166 struct iio_buffer *buffer;
168 int ret;
167
168 indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
169 if (!indio_dev)
170 return -ENOMEM;
171
172 als = iio_priv(indio_dev);
173
174 device->driver_data = indio_dev;
175 als->device = device;
176 mutex_init(&als->lock);
177
178 indio_dev->name = ACPI_ALS_DEVICE_NAME;
179 indio_dev->info = &acpi_als_info;
169
170 indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
171 if (!indio_dev)
172 return -ENOMEM;
173
174 als = iio_priv(indio_dev);
175
176 device->driver_data = indio_dev;
177 als->device = device;
178 mutex_init(&als->lock);
179
180 indio_dev->name = ACPI_ALS_DEVICE_NAME;
181 indio_dev->info = &acpi_als_info;
180 indio_dev->modes = INDIO_BUFFER_SOFTWARE;
181 indio_dev->channels = acpi_als_channels;
182 indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
183
182 indio_dev->channels = acpi_als_channels;
183 indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
184
184 buffer = devm_iio_kfifo_allocate(&device->dev);
185 if (!buffer)
186 return -ENOMEM;
185 ret = devm_iio_kfifo_buffer_setup(&device->dev, indio_dev,
186 INDIO_BUFFER_SOFTWARE, NULL);
187 if (ret)
188 return ret;
187
189
188 iio_device_attach_buffer(indio_dev, buffer);
189
190 return devm_iio_device_register(&device->dev, indio_dev);
191}
192
193static const struct acpi_device_id acpi_als_device_ids[] = {
194 {"ACPI0008", 0},
195 {},
196};
197

--- 19 unchanged lines hidden --- 		190 return devm_iio_device_register(&device->dev, indio_dev);
191}
192
193static const struct acpi_device_id acpi_als_device_ids[] = {
194 {"ACPI0008", 0},
195 {},
196};
197

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