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Commit 57157d1c authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
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staging:iio:meter:ade7754: allocate state with iio_dev and buffers in state. 



Signed-off-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Acked-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent bfccd4fb

drivers/staging/iio/meter/ade7754.c

+29 −51
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ static int ade7754_spi_write_reg_8(struct device *dev, 
{

	int ret;

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);

	struct ade7754_state *st = iio_priv(indio_dev);



	mutex_lock(&st->buf_lock);

	st->tx[0] = ADE7754_WRITE_REG(reg_address);
@@ -47,7 +47,7 @@ static int ade7754_spi_write_reg_16(struct device *dev, 
{

	int ret;

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);

	struct ade7754_state *st = iio_priv(indio_dev);



	mutex_lock(&st->buf_lock);

	st->tx[0] = ADE7754_WRITE_REG(reg_address);
@@ -64,7 +64,7 @@ static int ade7754_spi_read_reg_8(struct device *dev, 
		u8 *val)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);

	struct ade7754_state *st = iio_priv(indio_dev);

	int ret;



	ret = spi_w8r8(st->us, ADE7754_READ_REG(reg_address));
@@ -83,7 +83,7 @@ static int ade7754_spi_read_reg_16(struct device *dev, 
		u16 *val)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);

	struct ade7754_state *st = iio_priv(indio_dev);

	int ret;



	ret = spi_w8r16(st->us, ADE7754_READ_REG(reg_address));
@@ -105,7 +105,7 @@ static int ade7754_spi_read_reg_24(struct device *dev, 
{

	struct spi_message msg;

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);

	struct ade7754_state *st = iio_priv(indio_dev);

	int ret;

	struct spi_transfer xfers[] = {

		{
@@ -388,10 +388,11 @@ static int ade7754_stop_device(struct device *dev) 
	return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);

}



static int ade7754_initial_setup(struct ade7754_state *st)

static int ade7754_initial_setup(struct iio_dev *indio_dev)

{

	int ret;

	struct device *dev = &st->indio_dev->dev;

	struct ade7754_state *st = iio_priv(indio_dev);

	struct device *dev = &indio_dev->dev;



	/* use low spi speed for init */

	st->us->mode = SPI_MODE_3;
@@ -436,7 +437,7 @@ static ssize_t ade7754_write_frequency(struct device *dev, 
		size_t len)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7754_state *st = iio_dev_get_devdata(indio_dev);

	struct ade7754_state *st = iio_priv(indio_dev);

	unsigned long val;

	int ret;

	u8 reg, t;
@@ -535,62 +536,44 @@ static const struct iio_info ade7754_info = { 
static int __devinit ade7754_probe(struct spi_device *spi)

{

	int ret, regdone = 0;

	struct ade7754_state *st = kzalloc(sizeof *st, GFP_KERNEL);

	if (!st) {

	struct ade7754_state *st;

	struct iio_dev *indio_dev;



	/* setup the industrialio driver allocated elements */

	indio_dev = iio_allocate_device(sizeof(*st));

	if (indio_dev == NULL) {

		ret = -ENOMEM;

		goto error_ret;

	}

	/* this is only used for removal purposes */

	spi_set_drvdata(spi, st);

	spi_set_drvdata(spi, indio_dev);



	/* Allocate the comms buffers */

	st->rx = kzalloc(sizeof(*st->rx)*ADE7754_MAX_RX, GFP_KERNEL);

	if (st->rx == NULL) {

		ret = -ENOMEM;

		goto error_free_st;

	}

	st->tx = kzalloc(sizeof(*st->tx)*ADE7754_MAX_TX, GFP_KERNEL);

	if (st->tx == NULL) {

		ret = -ENOMEM;

		goto error_free_rx;

	}

	st = iio_priv(indio_dev);

	st->us = spi;

	mutex_init(&st->buf_lock);

	/* setup the industrialio driver allocated elements */

	st->indio_dev = iio_allocate_device(0);

	if (st->indio_dev == NULL) {

		ret = -ENOMEM;

		goto error_free_tx;

	}



	st->indio_dev->name = spi->dev.driver->name;

	st->indio_dev->dev.parent = &spi->dev;

	st->indio_dev->info = &ade7754_info;

	st->indio_dev->dev_data = (void *)(st);

	st->indio_dev->modes = INDIO_DIRECT_MODE;

	indio_dev->name = spi->dev.driver->name;

	indio_dev->dev.parent = &spi->dev;

	indio_dev->info = &ade7754_info;

	indio_dev->modes = INDIO_DIRECT_MODE;



	ret = iio_device_register(st->indio_dev);

	ret = iio_device_register(indio_dev);

	if (ret)

		goto error_free_dev;

	regdone = 1;



	/* Get the device into a sane initial state */

	ret = ade7754_initial_setup(st);

	ret = ade7754_initial_setup(indio_dev);

	if (ret)

		goto error_free_dev;

	return 0;



error_free_dev:

	if (regdone)

		iio_device_unregister(st->indio_dev);

		iio_device_unregister(indio_dev);

	else

		iio_free_device(st->indio_dev);

error_free_tx:

	kfree(st->tx);

error_free_rx:

	kfree(st->rx);

error_free_st:

	kfree(st);

		iio_free_device(indio_dev);



error_ret:

	return ret;

}
@@ -599,22 +582,17 @@ error_ret: 
static int ade7754_remove(struct spi_device *spi)

{

	int ret;

	struct ade7754_state *st = spi_get_drvdata(spi);

	struct iio_dev *indio_dev = st->indio_dev;

	struct iio_dev *indio_dev = spi_get_drvdata(spi);



	ret = ade7754_stop_device(&(indio_dev->dev));

	if (ret)

		goto err_ret;



	iio_device_unregister(indio_dev);

	kfree(st->tx);

	kfree(st->rx);

	kfree(st);



	return 0;



err_ret:

	return ret;



}



static struct spi_driver ade7754_driver = {

drivers/staging/iio/meter/ade7754.h

+5 −7
Original line number Diff line number Diff line
@@ -78,17 +78,15 @@ 
/**

 * struct ade7754_state - device instance specific data

 * @us:			actual spi_device

 * @indio_dev:		industrial I/O device structure

 * @buf_lock:		mutex to protect tx and rx

 * @tx:			transmit buffer

 * @rx:			receive buffer

 * @buf_lock:		mutex to protect tx and rx

 **/

struct ade7754_state {

	struct spi_device	*us;

	struct iio_dev			*indio_dev;

	u8				*tx;

	u8				*rx;

	struct mutex		buf_lock;

	u8			tx[ADE7754_MAX_TX] ____cacheline_aligned;

	u8			rx[ADE7754_MAX_RX];

};



#endif