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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>
316 lines
7.6 KiB
C
316 lines
7.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* adjd_s311.c - Support for ADJD-S311-CR999 digital color sensor
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*
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* Copyright (C) 2012 Peter Meerwald <pmeerw@pmeerw.net>
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*
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* driver for ADJD-S311-CR999 digital color sensor (10-bit channels for
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* red, green, blue, clear); 7-bit I2C slave address 0x74
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*
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* limitations: no calibration, no offset mode, no sleep mode
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/bitmap.h>
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#include <linux/err.h>
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#include <linux/irq.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/triggered_buffer.h>
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#define ADJD_S311_DRV_NAME "adjd_s311"
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#define ADJD_S311_CTRL 0x00
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#define ADJD_S311_CONFIG 0x01
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#define ADJD_S311_CAP_RED 0x06
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#define ADJD_S311_CAP_GREEN 0x07
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#define ADJD_S311_CAP_BLUE 0x08
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#define ADJD_S311_CAP_CLEAR 0x09
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#define ADJD_S311_INT_RED 0x0a
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#define ADJD_S311_INT_GREEN 0x0c
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#define ADJD_S311_INT_BLUE 0x0e
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#define ADJD_S311_INT_CLEAR 0x10
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#define ADJD_S311_DATA_RED 0x40
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#define ADJD_S311_DATA_GREEN 0x42
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#define ADJD_S311_DATA_BLUE 0x44
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#define ADJD_S311_DATA_CLEAR 0x46
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#define ADJD_S311_OFFSET_RED 0x48
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#define ADJD_S311_OFFSET_GREEN 0x49
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#define ADJD_S311_OFFSET_BLUE 0x4a
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#define ADJD_S311_OFFSET_CLEAR 0x4b
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#define ADJD_S311_CTRL_GOFS 0x02
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#define ADJD_S311_CTRL_GSSR 0x01
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#define ADJD_S311_CAP_MASK 0x0f
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#define ADJD_S311_INT_MASK 0x0fff
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#define ADJD_S311_DATA_MASK 0x03ff
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struct adjd_s311_data {
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struct i2c_client *client;
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u16 *buffer;
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};
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enum adjd_s311_channel_idx {
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IDX_RED, IDX_GREEN, IDX_BLUE, IDX_CLEAR
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};
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#define ADJD_S311_DATA_REG(chan) (ADJD_S311_DATA_RED + (chan) * 2)
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#define ADJD_S311_INT_REG(chan) (ADJD_S311_INT_RED + (chan) * 2)
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#define ADJD_S311_CAP_REG(chan) (ADJD_S311_CAP_RED + (chan))
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static int adjd_s311_req_data(struct iio_dev *indio_dev)
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{
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struct adjd_s311_data *data = iio_priv(indio_dev);
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int tries = 10;
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int ret = i2c_smbus_write_byte_data(data->client, ADJD_S311_CTRL,
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ADJD_S311_CTRL_GSSR);
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if (ret < 0)
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return ret;
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while (tries--) {
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ret = i2c_smbus_read_byte_data(data->client, ADJD_S311_CTRL);
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if (ret < 0)
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return ret;
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if (!(ret & ADJD_S311_CTRL_GSSR))
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break;
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msleep(20);
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}
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if (tries < 0) {
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dev_err(&data->client->dev,
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"adjd_s311_req_data() failed, data not ready\n");
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return -EIO;
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}
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return 0;
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}
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static int adjd_s311_read_data(struct iio_dev *indio_dev, u8 reg, int *val)
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{
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struct adjd_s311_data *data = iio_priv(indio_dev);
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int ret = adjd_s311_req_data(indio_dev);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_read_word_data(data->client, reg);
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if (ret < 0)
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return ret;
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*val = ret & ADJD_S311_DATA_MASK;
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return 0;
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}
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static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
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{
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struct iio_poll_func *pf = p;
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struct iio_dev *indio_dev = pf->indio_dev;
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struct adjd_s311_data *data = iio_priv(indio_dev);
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s64 time_ns = iio_get_time_ns(indio_dev);
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int i, j = 0;
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int ret = adjd_s311_req_data(indio_dev);
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if (ret < 0)
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goto done;
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for_each_set_bit(i, indio_dev->active_scan_mask,
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indio_dev->masklength) {
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ret = i2c_smbus_read_word_data(data->client,
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ADJD_S311_DATA_REG(i));
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if (ret < 0)
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goto done;
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data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
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}
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iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns);
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done:
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iio_trigger_notify_done(indio_dev->trig);
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return IRQ_HANDLED;
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}
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#define ADJD_S311_CHANNEL(_color, _scan_idx) { \
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.type = IIO_INTENSITY, \
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.modified = 1, \
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.address = (IDX_##_color), \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
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BIT(IIO_CHAN_INFO_HARDWAREGAIN) | \
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BIT(IIO_CHAN_INFO_INT_TIME), \
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.channel2 = (IIO_MOD_LIGHT_##_color), \
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.scan_index = (_scan_idx), \
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.scan_type = { \
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.sign = 'u', \
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.realbits = 10, \
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.storagebits = 16, \
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.endianness = IIO_CPU, \
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}, \
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}
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static const struct iio_chan_spec adjd_s311_channels[] = {
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ADJD_S311_CHANNEL(RED, 0),
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ADJD_S311_CHANNEL(GREEN, 1),
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ADJD_S311_CHANNEL(BLUE, 2),
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ADJD_S311_CHANNEL(CLEAR, 3),
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IIO_CHAN_SOFT_TIMESTAMP(4),
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};
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static int adjd_s311_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 adjd_s311_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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ret = adjd_s311_read_data(indio_dev,
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ADJD_S311_DATA_REG(chan->address), val);
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if (ret < 0)
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return ret;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_HARDWAREGAIN:
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ret = i2c_smbus_read_byte_data(data->client,
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ADJD_S311_CAP_REG(chan->address));
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if (ret < 0)
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return ret;
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*val = ret & ADJD_S311_CAP_MASK;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_INT_TIME:
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ret = i2c_smbus_read_word_data(data->client,
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ADJD_S311_INT_REG(chan->address));
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if (ret < 0)
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return ret;
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*val = 0;
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/*
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* not documented, based on measurement:
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* 4095 LSBs correspond to roughly 4 ms
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*/
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*val2 = ret & ADJD_S311_INT_MASK;
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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 adjd_s311_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 adjd_s311_data *data = iio_priv(indio_dev);
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switch (mask) {
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case IIO_CHAN_INFO_HARDWAREGAIN:
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if (val < 0 || val > ADJD_S311_CAP_MASK)
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return -EINVAL;
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return i2c_smbus_write_byte_data(data->client,
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ADJD_S311_CAP_REG(chan->address), val);
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case IIO_CHAN_INFO_INT_TIME:
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if (val != 0 || val2 < 0 || val2 > ADJD_S311_INT_MASK)
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return -EINVAL;
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return i2c_smbus_write_word_data(data->client,
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ADJD_S311_INT_REG(chan->address), val2);
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}
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return -EINVAL;
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}
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static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
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const unsigned long *scan_mask)
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{
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struct adjd_s311_data *data = iio_priv(indio_dev);
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kfree(data->buffer);
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data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
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if (data->buffer == NULL)
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return -ENOMEM;
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return 0;
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}
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static const struct iio_info adjd_s311_info = {
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.read_raw = adjd_s311_read_raw,
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.write_raw = adjd_s311_write_raw,
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.update_scan_mode = adjd_s311_update_scan_mode,
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};
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static int adjd_s311_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct adjd_s311_data *data;
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struct iio_dev *indio_dev;
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int err;
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indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
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if (indio_dev == NULL)
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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 = &adjd_s311_info;
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indio_dev->name = ADJD_S311_DRV_NAME;
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indio_dev->channels = adjd_s311_channels;
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indio_dev->num_channels = ARRAY_SIZE(adjd_s311_channels);
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indio_dev->modes = INDIO_DIRECT_MODE;
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err = iio_triggered_buffer_setup(indio_dev, NULL,
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adjd_s311_trigger_handler, NULL);
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if (err < 0)
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return err;
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err = iio_device_register(indio_dev);
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if (err)
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goto exit_unreg_buffer;
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dev_info(&client->dev, "ADJD-S311 color sensor registered\n");
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return 0;
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exit_unreg_buffer:
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iio_triggered_buffer_cleanup(indio_dev);
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return err;
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}
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static int adjd_s311_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 adjd_s311_data *data = iio_priv(indio_dev);
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iio_device_unregister(indio_dev);
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iio_triggered_buffer_cleanup(indio_dev);
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kfree(data->buffer);
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return 0;
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}
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static const struct i2c_device_id adjd_s311_id[] = {
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{ "adjd_s311", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adjd_s311_id);
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static struct i2c_driver adjd_s311_driver = {
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.driver = {
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.name = ADJD_S311_DRV_NAME,
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},
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.probe = adjd_s311_probe,
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.remove = adjd_s311_remove,
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.id_table = adjd_s311_id,
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};
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module_i2c_driver(adjd_s311_driver);
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MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
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MODULE_DESCRIPTION("ADJD-S311 color sensor");
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MODULE_LICENSE("GPL");
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