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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>
213 lines
4.9 KiB
C
213 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* veml6070.c - Support for Vishay VEML6070 UV A light sensor
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*
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* Copyright 2016 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
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*
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* IIO driver for VEML6070 (7-bit I2C slave addresses 0x38 and 0x39)
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*
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* TODO: integration time, ACK signal
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#define VEML6070_DRV_NAME "veml6070"
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#define VEML6070_ADDR_CONFIG_DATA_MSB 0x38 /* read: MSB data, write: config */
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#define VEML6070_ADDR_DATA_LSB 0x39 /* LSB data */
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#define VEML6070_COMMAND_ACK BIT(5) /* raise interrupt when over threshold */
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#define VEML6070_COMMAND_IT GENMASK(3, 2) /* bit mask integration time */
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#define VEML6070_COMMAND_RSRVD BIT(1) /* reserved, set to 1 */
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#define VEML6070_COMMAND_SD BIT(0) /* shutdown mode when set */
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#define VEML6070_IT_10 0x04 /* integration time 1x */
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struct veml6070_data {
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struct i2c_client *client1;
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struct i2c_client *client2;
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u8 config;
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struct mutex lock;
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};
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static int veml6070_read(struct veml6070_data *data)
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{
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int ret;
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u8 msb, lsb;
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mutex_lock(&data->lock);
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/* disable shutdown */
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ret = i2c_smbus_write_byte(data->client1,
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data->config & ~VEML6070_COMMAND_SD);
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if (ret < 0)
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goto out;
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msleep(125 + 10); /* measurement takes up to 125 ms for IT 1x */
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ret = i2c_smbus_read_byte(data->client2); /* read MSB, address 0x39 */
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if (ret < 0)
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goto out;
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msb = ret;
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ret = i2c_smbus_read_byte(data->client1); /* read LSB, address 0x38 */
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if (ret < 0)
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goto out;
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lsb = ret;
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/* shutdown again */
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ret = i2c_smbus_write_byte(data->client1, data->config);
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if (ret < 0)
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goto out;
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ret = (msb << 8) | lsb;
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out:
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mutex_unlock(&data->lock);
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return ret;
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}
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static const struct iio_chan_spec veml6070_channels[] = {
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{
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.type = IIO_INTENSITY,
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.modified = 1,
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.channel2 = IIO_MOD_LIGHT_UV,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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},
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{
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.type = IIO_UVINDEX,
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.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
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}
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};
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static int veml6070_to_uv_index(unsigned val)
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{
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/*
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* conversion of raw UV intensity values to UV index depends on
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* integration time (IT) and value of the resistor connected to
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* the RSET pin (default: 270 KOhm)
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*/
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unsigned uvi[11] = {
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187, 373, 560, /* low */
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746, 933, 1120, /* moderate */
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1308, 1494, /* high */
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1681, 1868, 2054}; /* very high */
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int i;
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for (i = 0; i < ARRAY_SIZE(uvi); i++)
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if (val <= uvi[i])
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return i;
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return 11; /* extreme */
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}
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static int veml6070_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask)
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{
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struct veml6070_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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case IIO_CHAN_INFO_PROCESSED:
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ret = veml6070_read(data);
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if (ret < 0)
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return ret;
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if (mask == IIO_CHAN_INFO_PROCESSED)
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*val = veml6070_to_uv_index(ret);
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else
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*val = ret;
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return IIO_VAL_INT;
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default:
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return -EINVAL;
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}
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}
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static const struct iio_info veml6070_info = {
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.read_raw = veml6070_read_raw,
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};
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static int veml6070_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct veml6070_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->client1 = client;
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mutex_init(&data->lock);
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indio_dev->info = &veml6070_info;
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indio_dev->channels = veml6070_channels;
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indio_dev->num_channels = ARRAY_SIZE(veml6070_channels);
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indio_dev->name = VEML6070_DRV_NAME;
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indio_dev->modes = INDIO_DIRECT_MODE;
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data->client2 = i2c_new_dummy_device(client->adapter, VEML6070_ADDR_DATA_LSB);
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if (IS_ERR(data->client2)) {
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dev_err(&client->dev, "i2c device for second chip address failed\n");
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return PTR_ERR(data->client2);
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}
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data->config = VEML6070_IT_10 | VEML6070_COMMAND_RSRVD |
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VEML6070_COMMAND_SD;
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ret = i2c_smbus_write_byte(data->client1, data->config);
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if (ret < 0)
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goto fail;
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ret = iio_device_register(indio_dev);
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if (ret < 0)
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goto fail;
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return ret;
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fail:
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i2c_unregister_device(data->client2);
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return ret;
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}
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static int veml6070_remove(struct i2c_client *client)
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{
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struct iio_dev *indio_dev = i2c_get_clientdata(client);
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struct veml6070_data *data = iio_priv(indio_dev);
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iio_device_unregister(indio_dev);
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i2c_unregister_device(data->client2);
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return 0;
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}
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static const struct i2c_device_id veml6070_id[] = {
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{ "veml6070", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, veml6070_id);
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static struct i2c_driver veml6070_driver = {
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.driver = {
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.name = VEML6070_DRV_NAME,
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},
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.probe = veml6070_probe,
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.remove = veml6070_remove,
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.id_table = veml6070_id,
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};
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module_i2c_driver(veml6070_driver);
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MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
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MODULE_DESCRIPTION("Vishay VEML6070 UV A light sensor driver");
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MODULE_LICENSE("GPL");
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