![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>
173 lines
4.1 KiB
C
173 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* tpl0102.c - Support for Texas Instruments digital potentiometers
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*
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* Copyright (C) 2016, 2018
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* Author: Matt Ranostay <matt.ranostay@konsulko.com>
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*
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* TODO: enable/disable hi-z output control
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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/regmap.h>
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#include <linux/iio/iio.h>
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struct tpl0102_cfg {
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int wipers;
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int avail[3];
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int kohms;
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};
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enum tpl0102_type {
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CAT5140_503,
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CAT5140_104,
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TPL0102_104,
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TPL0401_103,
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};
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static const struct tpl0102_cfg tpl0102_cfg[] = {
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/* on-semiconductor parts */
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[CAT5140_503] = { .wipers = 1, .avail = { 0, 1, 255 }, .kohms = 50, },
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[CAT5140_104] = { .wipers = 1, .avail = { 0, 1, 255 }, .kohms = 100, },
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/* ti parts */
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[TPL0102_104] = { .wipers = 2, .avail = { 0, 1, 255 }, .kohms = 100 },
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[TPL0401_103] = { .wipers = 1, .avail = { 0, 1, 127 }, .kohms = 10, },
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};
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struct tpl0102_data {
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struct regmap *regmap;
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const struct tpl0102_cfg *cfg;
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};
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static const struct regmap_config tpl0102_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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#define TPL0102_CHANNEL(ch) { \
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.type = IIO_RESISTANCE, \
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.indexed = 1, \
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.output = 1, \
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.channel = (ch), \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
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.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW), \
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}
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static const struct iio_chan_spec tpl0102_channels[] = {
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TPL0102_CHANNEL(0),
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TPL0102_CHANNEL(1),
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};
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static int tpl0102_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 tpl0102_data *data = iio_priv(indio_dev);
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switch (mask) {
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case IIO_CHAN_INFO_RAW: {
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int ret = regmap_read(data->regmap, chan->channel, val);
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return ret ? ret : IIO_VAL_INT;
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}
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case IIO_CHAN_INFO_SCALE:
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*val = 1000 * data->cfg->kohms;
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*val2 = data->cfg->avail[2] + 1;
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return IIO_VAL_FRACTIONAL;
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}
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return -EINVAL;
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}
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static int tpl0102_read_avail(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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const int **vals, int *type, int *length,
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long mask)
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{
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struct tpl0102_data *data = iio_priv(indio_dev);
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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*length = ARRAY_SIZE(data->cfg->avail);
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*vals = data->cfg->avail;
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*type = IIO_VAL_INT;
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return IIO_AVAIL_RANGE;
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}
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return -EINVAL;
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}
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static int tpl0102_write_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 tpl0102_data *data = iio_priv(indio_dev);
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if (mask != IIO_CHAN_INFO_RAW)
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return -EINVAL;
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if (val > data->cfg->avail[2] || val < 0)
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return -EINVAL;
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return regmap_write(data->regmap, chan->channel, val);
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}
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static const struct iio_info tpl0102_info = {
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.read_raw = tpl0102_read_raw,
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.read_avail = tpl0102_read_avail,
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.write_raw = tpl0102_write_raw,
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};
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static int tpl0102_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev = &client->dev;
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struct tpl0102_data *data;
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struct iio_dev *indio_dev;
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indio_dev = devm_iio_device_alloc(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->cfg = &tpl0102_cfg[id->driver_data];
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data->regmap = devm_regmap_init_i2c(client, &tpl0102_regmap_config);
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if (IS_ERR(data->regmap)) {
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dev_err(dev, "regmap initialization failed\n");
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return PTR_ERR(data->regmap);
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}
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indio_dev->info = &tpl0102_info;
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indio_dev->channels = tpl0102_channels;
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indio_dev->num_channels = data->cfg->wipers;
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indio_dev->name = client->name;
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return devm_iio_device_register(dev, indio_dev);
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}
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static const struct i2c_device_id tpl0102_id[] = {
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{ "cat5140-503", CAT5140_503 },
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{ "cat5140-104", CAT5140_104 },
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{ "tpl0102-104", TPL0102_104 },
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{ "tpl0401-103", TPL0401_103 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, tpl0102_id);
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static struct i2c_driver tpl0102_driver = {
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.driver = {
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.name = "tpl0102",
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},
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.probe = tpl0102_probe,
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.id_table = tpl0102_id,
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};
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module_i2c_driver(tpl0102_driver);
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MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
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MODULE_DESCRIPTION("TPL0102 digital potentiometer");
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MODULE_LICENSE("GPL");
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