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Release 4.7 drivers/iio/gyro/adis16080.c

Directory: drivers/iio/gyro
/*
 * ADIS16080/100 Yaw Rate Gyroscope with SPI driver
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/module.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>


#define ADIS16080_DIN_GYRO   (0 << 10) 
/* Gyroscope output */

#define ADIS16080_DIN_TEMP   (1 << 10) 
/* Temperature output */

#define ADIS16080_DIN_AIN1   (2 << 10)

#define ADIS16080_DIN_AIN2   (3 << 10)

/*
 * 1: Write contents on DIN to control register.
 * 0: No changes to control register.
 */


#define ADIS16080_DIN_WRITE  (1 << 15)


struct adis16080_chip_info {
	
int scale_val;
	
int scale_val2;
};

/**
 * struct adis16080_state - device instance specific data
 * @us:                 actual spi_device to write data
 * @info:               chip specific parameters
 * @buf:                transmit or receive buffer
 **/

struct adis16080_state {
	
struct spi_device		*us;
	
const struct adis16080_chip_info *info;

	
__be16 buf ____cacheline_aligned;
};


static int adis16080_read_sample(struct iio_dev *indio_dev, u16 addr, int *val) { struct adis16080_state *st = iio_priv(indio_dev); int ret; struct spi_transfer t[] = { { .tx_buf = &st->buf, .len = 2, .cs_change = 1, }, { .rx_buf = &st->buf, .len = 2, }, }; st->buf = cpu_to_be16(addr | ADIS16080_DIN_WRITE); ret = spi_sync_transfer(st->us, t, ARRAY_SIZE(t)); if (ret == 0) *val = sign_extend32(be16_to_cpu(st->buf), 11); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
lars-peter clausenlars-peter clausen7157.26%444.44%
barry songbarry song4737.90%111.11%
jonathan cameronjonathan cameron64.84%444.44%
Total124100.00%9100.00%


static int adis16080_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct adis16080_state *st = iio_priv(indio_dev); int ret; switch (mask) { case IIO_CHAN_INFO_RAW: mutex_lock(&indio_dev->mlock); ret = adis16080_read_sample(indio_dev, chan->address, val); mutex_unlock(&indio_dev->mlock); return ret ? ret : IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: switch (chan->type) { case IIO_ANGL_VEL: *val = st->info->scale_val; *val2 = st->info->scale_val2; return IIO_VAL_FRACTIONAL; case IIO_VOLTAGE: /* VREF = 5V, 12 bits */ *val = 5000; *val2 = 12; return IIO_VAL_FRACTIONAL_LOG2; case IIO_TEMP: /* 85 C = 585, 25 C = 0 */ *val = 85000 - 25000; *val2 = 585; return IIO_VAL_FRACTIONAL; default: return -EINVAL; } case IIO_CHAN_INFO_OFFSET: switch (chan->type) { case IIO_VOLTAGE: /* 2.5 V = 0 */ *val = 2048; return IIO_VAL_INT; case IIO_TEMP: /* 85 C = 585, 25 C = 0 */ *val = DIV_ROUND_CLOSEST(25 * 585, 85 - 25); return IIO_VAL_INT; default: return -EINVAL; } default: break; } return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
lars-peter clausenlars-peter clausen15571.43%233.33%
jonathan cameronjonathan cameron3616.59%350.00%
barry songbarry song2611.98%116.67%
Total217100.00%6100.00%

static const struct iio_chan_spec adis16080_channels[] = { { .type = IIO_ANGL_VEL, .modified = 1, .channel2 = IIO_MOD_Z, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), .address = ADIS16080_DIN_GYRO, }, { .type = IIO_VOLTAGE, .indexed = 1, .channel = 0, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), .address = ADIS16080_DIN_AIN1, }, { .type = IIO_VOLTAGE, .indexed = 1, .channel = 1, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), .address = ADIS16080_DIN_AIN2, }, { .type = IIO_TEMP, .indexed = 1, .channel = 0, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), .address = ADIS16080_DIN_TEMP, } }; static const struct iio_info adis16080_info = { .read_raw = &adis16080_read_raw, .driver_module = THIS_MODULE, }; enum { ID_ADIS16080, ID_ADIS16100, }; static const struct adis16080_chip_info adis16080_chip_info[] = { [ID_ADIS16080] = { /* 80 degree = 819, 819 rad = 46925 degree */ .scale_val = 80, .scale_val2 = 46925, }, [ID_ADIS16100] = { /* 300 degree = 1230, 1230 rad = 70474 degree */ .scale_val = 300, .scale_val2 = 70474, }, };
static int adis16080_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); struct adis16080_state *st; struct iio_dev *indio_dev; /* setup the industrialio driver allocated elements */ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); if (!indio_dev) return -ENOMEM; st = iio_priv(indio_dev); /* this is only used for removal purposes */ spi_set_drvdata(spi, indio_dev); /* Allocate the comms buffers */ st->us = spi; st->info = &adis16080_chip_info[id->driver_data]; indio_dev->name = spi->dev.driver->name; indio_dev->channels = adis16080_channels; indio_dev->num_channels = ARRAY_SIZE(adis16080_channels); indio_dev->dev.parent = &spi->dev; indio_dev->info = &adis16080_info; indio_dev->modes = INDIO_DIRECT_MODE; return iio_device_register(indio_dev); }

Contributors

PersonTokensPropCommitsCommitProp
barry songbarry song6543.62%114.29%
jonathan cameronjonathan cameron5134.23%457.14%
lars-peter clausenlars-peter clausen2315.44%114.29%
sachin kamatsachin kamat106.71%114.29%
Total149100.00%7100.00%


static int adis16080_remove(struct spi_device *spi) { iio_device_unregister(spi_get_drvdata(spi)); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
barry songbarry song2090.91%150.00%
jonathan cameronjonathan cameron29.09%150.00%
Total22100.00%2100.00%

static const struct spi_device_id adis16080_ids[] = { { "adis16080", ID_ADIS16080 }, { "adis16100", ID_ADIS16100 }, {}, }; MODULE_DEVICE_TABLE(spi, adis16080_ids); static struct spi_driver adis16080_driver = { .driver = { .name = "adis16080", }, .probe = adis16080_probe, .remove = adis16080_remove, .id_table = adis16080_ids, }; module_spi_driver(adis16080_driver); MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); MODULE_DESCRIPTION("Analog Devices ADIS16080/100 Yaw Rate Gyroscope Driver"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
lars-peter clausenlars-peter clausen36139.54%733.33%
jonathan cameronjonathan cameron29532.31%1152.38%
barry songbarry song24426.73%14.76%
sachin kamatsachin kamat101.10%14.76%
paul gortmakerpaul gortmaker30.33%14.76%
Total913100.00%21100.00%
Directory: drivers/iio/gyro
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