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![Alexandru Ardelean](/assets/img/avatar_default.png)
This patch applies the semantic patch: @@ expression I, P, SP; @@ I = devm_iio_device_alloc(P, SP); ... - I->dev.parent = P; It updates 302 files and does 307 deletions. This semantic patch also removes some comments like '/* Establish that the iio_dev is a child of the i2c device */' But this is is only done in case where the block is left empty. The patch does not seem to cover all cases. It looks like in some cases a different variable is used in some cases to assign the parent, but it points to the same reference. In other cases, the block covered by ... may be just too big to be covered by the semantic patch. However, this looks pretty good as well, as it does cover a big bulk of the drivers that should remove the parent assignment. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
241 lines
5.7 KiB
C
241 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AL3010 - Dyna Image Ambient Light Sensor
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*
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* Copyright (c) 2014, Intel Corporation.
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* Copyright (c) 2016, Dyna-Image Corp.
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* Copyright (c) 2020, David Heidelberg, Michał Mirosław, Dmitry Osipenko
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*
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* IIO driver for AL3010 (7-bit I2C slave address 0x1C).
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*
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* TODO: interrupt support, thresholds
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* When the driver will get support for interrupt handling, then interrupt
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* will need to be disabled before turning sensor OFF in order to avoid
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* potential races with the interrupt handling.
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*/
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#include <linux/bitfield.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#define AL3010_DRV_NAME "al3010"
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#define AL3010_REG_SYSTEM 0x00
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#define AL3010_REG_DATA_LOW 0x0c
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#define AL3010_REG_CONFIG 0x10
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#define AL3010_CONFIG_DISABLE 0x00
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#define AL3010_CONFIG_ENABLE 0x01
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#define AL3010_GAIN_MASK GENMASK(6,4)
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#define AL3010_SCALE_AVAILABLE "1.1872 0.2968 0.0742 0.018"
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enum al3xxxx_range {
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AL3XXX_RANGE_1, /* 77806 lx */
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AL3XXX_RANGE_2, /* 19542 lx */
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AL3XXX_RANGE_3, /* 4863 lx */
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AL3XXX_RANGE_4 /* 1216 lx */
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};
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static const int al3010_scales[][2] = {
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{0, 1187200}, {0, 296800}, {0, 74200}, {0, 18600}
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};
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struct al3010_data {
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struct i2c_client *client;
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};
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static const struct iio_chan_spec al3010_channels[] = {
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{
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.type = IIO_LIGHT,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE),
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}
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};
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static IIO_CONST_ATTR(in_illuminance_scale_available, AL3010_SCALE_AVAILABLE);
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static struct attribute *al3010_attributes[] = {
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&iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
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NULL,
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};
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static const struct attribute_group al3010_attribute_group = {
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.attrs = al3010_attributes,
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};
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static int al3010_set_pwr(struct i2c_client *client, bool pwr)
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{
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u8 val = pwr ? AL3010_CONFIG_ENABLE : AL3010_CONFIG_DISABLE;
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return i2c_smbus_write_byte_data(client, AL3010_REG_SYSTEM, val);
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}
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static void al3010_set_pwr_off(void *_data)
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{
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struct al3010_data *data = _data;
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al3010_set_pwr(data->client, false);
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}
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static int al3010_init(struct al3010_data *data)
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{
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int ret;
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ret = al3010_set_pwr(data->client, true);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_CONFIG,
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FIELD_PREP(AL3010_GAIN_MASK,
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AL3XXX_RANGE_3));
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if (ret < 0)
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return ret;
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return 0;
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}
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static int al3010_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val,
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int *val2, long mask)
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{
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struct al3010_data *data = iio_priv(indio_dev);
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int ret;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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/*
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* ALS ADC value is stored in two adjacent registers:
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* - low byte of output is stored at AL3010_REG_DATA_LOW
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* - high byte of output is stored at AL3010_REG_DATA_LOW + 1
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*/
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ret = i2c_smbus_read_word_data(data->client,
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AL3010_REG_DATA_LOW);
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if (ret < 0)
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return ret;
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*val = ret;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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ret = i2c_smbus_read_byte_data(data->client,
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AL3010_REG_CONFIG);
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if (ret < 0)
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return ret;
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ret = FIELD_GET(AL3010_GAIN_MASK, ret);
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*val = al3010_scales[ret][0];
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*val2 = al3010_scales[ret][1];
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return IIO_VAL_INT_PLUS_MICRO;
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}
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return -EINVAL;
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}
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static int al3010_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int val,
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int val2, long mask)
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{
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struct al3010_data *data = iio_priv(indio_dev);
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int i;
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switch (mask) {
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case IIO_CHAN_INFO_SCALE:
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for (i = 0; i < ARRAY_SIZE(al3010_scales); i++) {
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if (val != al3010_scales[i][0] ||
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val2 != al3010_scales[i][1])
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continue;
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return i2c_smbus_write_byte_data(data->client,
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AL3010_REG_CONFIG,
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FIELD_PREP(AL3010_GAIN_MASK, i));
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}
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break;
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}
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return -EINVAL;
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}
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static const struct iio_info al3010_info = {
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.read_raw = al3010_read_raw,
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.write_raw = al3010_write_raw,
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.attrs = &al3010_attribute_group,
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};
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static int al3010_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct al3010_data *data;
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struct iio_dev *indio_dev;
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int ret;
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indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
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if (!indio_dev)
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return -ENOMEM;
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data = iio_priv(indio_dev);
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i2c_set_clientdata(client, indio_dev);
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data->client = client;
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indio_dev->info = &al3010_info;
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indio_dev->name = AL3010_DRV_NAME;
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indio_dev->channels = al3010_channels;
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indio_dev->num_channels = ARRAY_SIZE(al3010_channels);
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indio_dev->modes = INDIO_DIRECT_MODE;
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ret = al3010_init(data);
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if (ret < 0) {
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dev_err(&client->dev, "al3010 chip init failed\n");
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return ret;
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}
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ret = devm_add_action_or_reset(&client->dev,
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al3010_set_pwr_off,
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data);
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if (ret < 0)
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return ret;
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return devm_iio_device_register(&client->dev, indio_dev);
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}
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static int __maybe_unused al3010_suspend(struct device *dev)
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{
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return al3010_set_pwr(to_i2c_client(dev), false);
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}
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static int __maybe_unused al3010_resume(struct device *dev)
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{
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return al3010_set_pwr(to_i2c_client(dev), true);
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}
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static SIMPLE_DEV_PM_OPS(al3010_pm_ops, al3010_suspend, al3010_resume);
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static const struct i2c_device_id al3010_id[] = {
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{"al3010", },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, al3010_id);
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static const struct of_device_id al3010_of_match[] = {
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{ .compatible = "dynaimage,al3010", },
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{},
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};
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MODULE_DEVICE_TABLE(of, al3010_of_match);
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static struct i2c_driver al3010_driver = {
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.driver = {
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.name = AL3010_DRV_NAME,
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.of_match_table = al3010_of_match,
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.pm = &al3010_pm_ops,
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},
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.probe = al3010_probe,
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.id_table = al3010_id,
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};
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module_i2c_driver(al3010_driver);
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MODULE_AUTHOR("Daniel Baluta <daniel.baluta@nxp.com>");
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MODULE_AUTHOR("David Heidelberg <david@ixit.cz>");
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MODULE_DESCRIPTION("AL3010 Ambient Light Sensor driver");
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MODULE_LICENSE("GPL v2");
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