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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>
175 lines
4.4 KiB
C
175 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ADIS16130 Digital Output, High Precision Angular Rate Sensor driver
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*
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* Copyright 2010 Analog Devices Inc.
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*/
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#include <linux/mutex.h>
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#include <linux/kernel.h>
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#include <linux/spi/spi.h>
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#include <linux/module.h>
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#include <linux/iio/iio.h>
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#include <asm/unaligned.h>
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#define ADIS16130_CON 0x0
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#define ADIS16130_CON_RD (1 << 6)
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#define ADIS16130_IOP 0x1
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/* 1 = data-ready signal low when unread data on all channels; */
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#define ADIS16130_IOP_ALL_RDY (1 << 3)
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#define ADIS16130_IOP_SYNC (1 << 0) /* 1 = synchronization enabled */
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#define ADIS16130_RATEDATA 0x8 /* Gyroscope output, rate of rotation */
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#define ADIS16130_TEMPDATA 0xA /* Temperature output */
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#define ADIS16130_RATECS 0x28 /* Gyroscope channel setup */
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#define ADIS16130_RATECS_EN (1 << 3) /* 1 = channel enable; */
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#define ADIS16130_TEMPCS 0x2A /* Temperature channel setup */
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#define ADIS16130_TEMPCS_EN (1 << 3)
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#define ADIS16130_RATECONV 0x30
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#define ADIS16130_TEMPCONV 0x32
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#define ADIS16130_MODE 0x38
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#define ADIS16130_MODE_24BIT (1 << 1) /* 1 = 24-bit resolution; */
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/**
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* struct adis16130_state - device instance specific data
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* @us: actual spi_device to write data
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* @buf_lock: mutex to protect tx and rx
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* @buf: unified tx/rx buffer
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**/
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struct adis16130_state {
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struct spi_device *us;
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struct mutex buf_lock;
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u8 buf[4] ____cacheline_aligned;
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};
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static int adis16130_spi_read(struct iio_dev *indio_dev, u8 reg_addr, u32 *val)
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{
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int ret;
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struct adis16130_state *st = iio_priv(indio_dev);
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struct spi_transfer xfer = {
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.tx_buf = st->buf,
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.rx_buf = st->buf,
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.len = 4,
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};
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mutex_lock(&st->buf_lock);
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st->buf[0] = ADIS16130_CON_RD | reg_addr;
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st->buf[1] = st->buf[2] = st->buf[3] = 0;
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ret = spi_sync_transfer(st->us, &xfer, 1);
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if (ret == 0)
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*val = get_unaligned_be24(&st->buf[1]);
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int adis16130_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,
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long mask)
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{
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int ret;
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u32 temp;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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/* Take the iio_dev status lock */
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ret = adis16130_spi_read(indio_dev, chan->address, &temp);
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if (ret)
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return ret;
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*val = temp;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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switch (chan->type) {
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case IIO_ANGL_VEL:
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/* 0 degree = 838860, 250 degree = 14260608 */
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*val = 250;
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*val2 = 336440817; /* RAD_TO_DEGREE(14260608 - 8388608) */
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return IIO_VAL_FRACTIONAL;
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case IIO_TEMP:
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/* 0C = 8036283, 105C = 9516048 */
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*val = 105000;
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*val2 = 9516048 - 8036283;
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return IIO_VAL_FRACTIONAL;
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default:
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return -EINVAL;
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}
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case IIO_CHAN_INFO_OFFSET:
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switch (chan->type) {
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case IIO_ANGL_VEL:
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*val = -8388608;
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return IIO_VAL_INT;
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case IIO_TEMP:
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*val = -8036283;
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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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return -EINVAL;
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}
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static const struct iio_chan_spec adis16130_channels[] = {
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{
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.type = IIO_ANGL_VEL,
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.modified = 1,
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.channel2 = IIO_MOD_Z,
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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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BIT(IIO_CHAN_INFO_OFFSET),
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.address = ADIS16130_RATEDATA,
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}, {
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.type = IIO_TEMP,
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.indexed = 1,
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.channel = 0,
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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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BIT(IIO_CHAN_INFO_OFFSET),
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.address = ADIS16130_TEMPDATA,
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}
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};
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static const struct iio_info adis16130_info = {
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.read_raw = &adis16130_read_raw,
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};
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static int adis16130_probe(struct spi_device *spi)
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{
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struct adis16130_state *st;
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struct iio_dev *indio_dev;
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/* setup the industrialio driver allocated elements */
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indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
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if (!indio_dev)
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return -ENOMEM;
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st = iio_priv(indio_dev);
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/* this is only used for removal purposes */
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spi_set_drvdata(spi, indio_dev);
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st->us = spi;
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mutex_init(&st->buf_lock);
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indio_dev->name = spi->dev.driver->name;
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indio_dev->channels = adis16130_channels;
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indio_dev->num_channels = ARRAY_SIZE(adis16130_channels);
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indio_dev->info = &adis16130_info;
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indio_dev->modes = INDIO_DIRECT_MODE;
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return devm_iio_device_register(&spi->dev, indio_dev);
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}
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static struct spi_driver adis16130_driver = {
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.driver = {
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.name = "adis16130",
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},
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.probe = adis16130_probe,
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};
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module_spi_driver(adis16130_driver);
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MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
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MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("spi:adis16130");
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