mirror of https://gitee.com/openkylin/linux.git
staging:iio:gyro: adis16130 cleanup, move to abi and bug fixes.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron
Greg Kroah-Hartman
parent
a301d425e6
commit
8e67875141
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@ -1,42 +0,0 @@
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#ifndef SPI_ADIS16130_H_
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#define SPI_ADIS16130_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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#define ADIS16130_MAX_TX 4
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#define ADIS16130_MAX_RX 4
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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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* @indio_dev: industrial I/O device structure
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* @tx: transmit buffer
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* @rx: recieve buffer
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* @buf_lock: mutex to protect tx and rx
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**/
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struct adis16130_state {
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struct spi_device *us;
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struct iio_dev *indio_dev;
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u8 *tx;
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u8 *rx;
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u32 mode; /* 1: 24bits mode 0:16bits mode */
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struct mutex buf_lock;
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};
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#endif /* SPI_ADIS16130_H_ */
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@ -6,9 +6,6 @@
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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@ -23,7 +20,39 @@
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#include "gyro.h"
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#include "../adc/adc.h"
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#include "adis16130.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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* @indio_dev: industrial I/O device structure
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* @mode: 24 bits (1) or 16 bits (0)
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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 iio_dev *indio_dev;
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u32 mode;
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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_write(struct device *dev, u8 reg_addr,
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u8 val)
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@ -33,10 +62,10 @@ static int adis16130_spi_write(struct device *dev, u8 reg_addr,
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struct adis16130_state *st = iio_dev_get_devdata(indio_dev);
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mutex_lock(&st->buf_lock);
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st->tx[0] = reg_addr;
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st->tx[1] = val;
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st->buf[0] = reg_addr;
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st->buf[1] = val;
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ret = spi_write(st->us, st->tx, 2);
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ret = spi_write(st->us, st->buf, 2);
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mutex_unlock(&st->buf_lock);
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return ret;
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@ -51,17 +80,19 @@ static int adis16130_spi_read(struct device *dev, u8 reg_addr,
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mutex_lock(&st->buf_lock);
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st->tx[0] = ADIS16130_CON_RD | reg_addr;
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st->buf[0] = ADIS16130_CON_RD | reg_addr;
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if (st->mode)
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ret = spi_read(st->us, st->rx, 4);
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ret = spi_read(st->us, st->buf, 4);
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else
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ret = spi_read(st->us, st->rx, 3);
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ret = spi_read(st->us, st->buf, 3);
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if (ret == 0) {
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if (st->mode)
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*val = (st->rx[1] << 16) | (st->rx[2] << 8) | st->rx[3];
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*val = (st->buf[1] << 16) |
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(st->buf[2] << 8) |
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st->buf[3];
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else
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*val = (st->rx[1] << 8) | st->rx[2];
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*val = (st->buf[1] << 8) | st->buf[2];
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}
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mutex_unlock(&st->buf_lock);
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@ -69,36 +100,18 @@ static int adis16130_spi_read(struct device *dev, u8 reg_addr,
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return ret;
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}
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static ssize_t adis16130_gyro_read(struct device *dev,
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static ssize_t adis16130_val_read(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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u32 val;
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ssize_t ret;
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/* Take the iio_dev status lock */
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mutex_lock(&indio_dev->mlock);
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ret = adis16130_spi_read(dev, ADIS16130_RATEDATA, &val);
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mutex_unlock(&indio_dev->mlock);
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if (ret == 0)
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return sprintf(buf, "%d\n", val);
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else
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return ret;
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}
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static ssize_t adis16130_temp_read(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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u32 val;
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ssize_t ret;
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/* Take the iio_dev status lock */
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mutex_lock(&indio_dev->mlock);
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ret = adis16130_spi_read(dev, ADIS16130_TEMPDATA, &val);
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ret = adis16130_spi_read(dev, this_attr->address, &val);
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mutex_unlock(&indio_dev->mlock);
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if (ret == 0)
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@ -114,7 +127,10 @@ static ssize_t adis16130_bitsmode_read(struct device *dev,
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct adis16130_state *st = iio_dev_get_devdata(indio_dev);
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return sprintf(buf, "%d\n", st->mode);
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if (st->mode == 1)
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return sprintf(buf, "s24\n");
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else
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return sprintf(buf, "s16\n");
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}
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static ssize_t adis16130_bitsmode_write(struct device *dev,
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@ -123,44 +139,38 @@ static ssize_t adis16130_bitsmode_write(struct device *dev,
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size_t len)
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{
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int ret;
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long val;
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u8 val;
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ret = strict_strtol(buf, 16, &val);
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if (ret)
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goto error_ret;
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ret = adis16130_spi_write(dev, ADIS16130_MODE, !!val);
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if (sysfs_streq(buf, "s16"))
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val = 0;
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else if (sysfs_streq(buf, "s24"))
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val = 1;
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else
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return -EINVAL;
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ret = adis16130_spi_write(dev, ADIS16130_MODE, val);
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error_ret:
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return ret ? ret : len;
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}
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static IIO_DEV_ATTR_TEMP_RAW(adis16130_temp_read);
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static IIO_DEVICE_ATTR(temp_raw, S_IRUGO, adis16130_val_read, NULL,
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ADIS16130_TEMPDATA);
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static IIO_CONST_ATTR(name, "adis16130");
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static IIO_DEV_ATTR_GYRO(adis16130_gyro_read,
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ADIS16130_RATEDATA);
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static IIO_DEV_ATTR_GYRO_Z(adis16130_val_read, ADIS16130_RATEDATA);
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#define IIO_DEV_ATTR_BITS_MODE(_mode, _show, _store, _addr) \
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IIO_DEVICE_ATTR(bits_mode, _mode, _show, _store, _addr)
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static IIO_DEV_ATTR_BITS_MODE(S_IWUSR | S_IRUGO, adis16130_bitsmode_read,
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static IIO_DEVICE_ATTR(gyro_z_type, S_IWUSR | S_IRUGO, adis16130_bitsmode_read,
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adis16130_bitsmode_write,
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ADIS16130_MODE);
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static struct attribute *adis16130_event_attributes[] = {
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NULL
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};
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static struct attribute_group adis16130_event_attribute_group = {
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.attrs = adis16130_event_attributes,
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};
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static IIO_CONST_ATTR(gyro_z_type_available, "s16 s24");
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static struct attribute *adis16130_attributes[] = {
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&iio_dev_attr_temp_raw.dev_attr.attr,
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&iio_const_attr_name.dev_attr.attr,
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&iio_dev_attr_gyro_raw.dev_attr.attr,
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&iio_dev_attr_bits_mode.dev_attr.attr,
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&iio_dev_attr_gyro_z_raw.dev_attr.attr,
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&iio_dev_attr_gyro_z_type.dev_attr.attr,
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&iio_const_attr_gyro_z_type_available.dev_attr.attr,
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NULL
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};
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@ -178,30 +188,16 @@ static int __devinit adis16130_probe(struct spi_device *spi)
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}
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/* this is only used for removal purposes */
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spi_set_drvdata(spi, st);
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/* Allocate the comms buffers */
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st->rx = kzalloc(sizeof(*st->rx)*ADIS16130_MAX_RX, GFP_KERNEL);
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if (st->rx == NULL) {
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ret = -ENOMEM;
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goto error_free_st;
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}
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st->tx = kzalloc(sizeof(*st->tx)*ADIS16130_MAX_TX, GFP_KERNEL);
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if (st->tx == NULL) {
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ret = -ENOMEM;
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goto error_free_rx;
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}
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st->us = spi;
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mutex_init(&st->buf_lock);
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/* setup the industrialio driver allocated elements */
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st->indio_dev = iio_allocate_device();
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if (st->indio_dev == NULL) {
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ret = -ENOMEM;
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goto error_free_tx;
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goto error_free_st;
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}
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st->indio_dev->dev.parent = &spi->dev;
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st->indio_dev->num_interrupt_lines = 1;
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st->indio_dev->event_attrs = &adis16130_event_attribute_group;
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st->indio_dev->attrs = &adis16130_attribute_group;
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st->indio_dev->dev_data = (void *)(st);
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st->indio_dev->driver_module = THIS_MODULE;
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@ -216,10 +212,6 @@ static int __devinit adis16130_probe(struct spi_device *spi)
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error_free_dev:
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iio_free_device(st->indio_dev);
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error_free_tx:
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kfree(st->tx);
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error_free_rx:
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kfree(st->rx);
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error_free_st:
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kfree(st);
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error_ret:
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@ -233,8 +225,6 @@ static int adis16130_remove(struct spi_device *spi)
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struct iio_dev *indio_dev = st->indio_dev;
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iio_device_unregister(indio_dev);
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kfree(st->tx);
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kfree(st->rx);
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kfree(st);
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return 0;
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@ -262,5 +252,5 @@ static __exit void adis16130_exit(void)
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module_exit(adis16130_exit);
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MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
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MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate Sensor driver");
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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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