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Commit 3859faca authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
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staging:iio:meter remove stubs from ade7759. 



General cleanup and use of standard functions to simplfy some spi reads
as well.

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 5a0326d9

drivers/staging/iio/meter/ade7759.c

+30 −135
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ 
#include "meter.h"

#include "ade7759.h"



int ade7759_spi_write_reg_8(struct device *dev,

static int ade7759_spi_write_reg_8(struct device *dev,

		u8 reg_address,

		u8 val)

{
@@ -46,25 +46,14 @@ static int ade7759_spi_write_reg_16(struct device *dev, 
		u16 value)

{

	int ret;

	struct spi_message msg;

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);

	struct spi_transfer xfers[] = {

		{

			.tx_buf = st->tx,

			.bits_per_word = 8,

			.len = 3,

		}

	};



	mutex_lock(&st->buf_lock);

	st->tx[0] = ADE7759_WRITE_REG(reg_address);

	st->tx[1] = (value >> 8) & 0xFF;

	st->tx[2] = value & 0xFF;



	spi_message_init(&msg);

	spi_message_add_tail(xfers, &msg);

	ret = spi_sync(st->us, &msg);

	ret = spi_write(st->us, st->tx, 3);

	mutex_unlock(&st->buf_lock);



	return ret;
@@ -74,73 +63,40 @@ static int ade7759_spi_read_reg_8(struct device *dev, 
		u8 reg_address,

		u8 *val)

{

	struct spi_message msg;

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);

	int ret;

	struct spi_transfer xfers[] = {

		{

			.tx_buf = st->tx,

			.rx_buf = st->rx,

			.bits_per_word = 8,

			.len = 2,

		},

	};



	mutex_lock(&st->buf_lock);

	st->tx[0] = ADE7759_READ_REG(reg_address);

	st->tx[1] = 0;



	spi_message_init(&msg);

	spi_message_add_tail(xfers, &msg);

	ret = spi_sync(st->us, &msg);

	if (ret) {

	ret = spi_w8r8(st->us, ADE7759_READ_REG(reg_address));

	if (ret < 0) {

		dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X",

				reg_address);

		goto error_ret;

		return ret;

	}

	*val = st->rx[1];

	*val = ret;



error_ret:

	mutex_unlock(&st->buf_lock);

	return ret;

	return 0;

}



static int ade7759_spi_read_reg_16(struct device *dev,

		u8 reg_address,

		u16 *val)

{

	struct spi_message msg;

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ade7759_state *st = iio_dev_get_devdata(indio_dev);

	int ret;

	struct spi_transfer xfers[] = {

		{

			.tx_buf = st->tx,

			.rx_buf = st->rx,

			.bits_per_word = 8,

			.len = 3,

		},

	};



	mutex_lock(&st->buf_lock);

	st->tx[0] = ADE7759_READ_REG(reg_address);

	st->tx[1] = 0;

	st->tx[2] = 0;



	spi_message_init(&msg);

	spi_message_add_tail(xfers, &msg);

	ret = spi_sync(st->us, &msg);

	if (ret) {

	ret = spi_w8r16(st->us, ADE7759_READ_REG(reg_address));

	if (ret < 0) {

		dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",

			reg_address);

		goto error_ret;

		return ret;

	}

	*val = (st->rx[1] << 8) | st->rx[2];



error_ret:

	mutex_unlock(&st->buf_lock);

	return ret;

	*val = ret;

	*val = be16_to_cpup(val);



	return 0;

}



static int ade7759_spi_read_reg_40(struct device *dev,
@@ -354,27 +310,22 @@ static int ade7759_set_irq(struct device *dev, bool enable) 
		irqen &= ~(1 << 3);



	ret = ade7759_spi_write_reg_8(dev, ADE7759_IRQEN, irqen);

	if (ret)

		goto error_ret;



error_ret:

	return ret;

}



/* Power down the device */

int ade7759_stop_device(struct device *dev)

static int ade7759_stop_device(struct device *dev)

{

	int ret;

	u16 val;



	ade7759_spi_read_reg_16(dev,

			ADE7759_MODE,

			&val);

	val |= 1 << 4;  /* AD converters can be turned off */

	ret = ade7759_spi_write_reg_16(dev,

			ADE7759_MODE,

			val);



	return ret;

	return ade7759_spi_write_reg_16(dev, ADE7759_MODE, val);

}



static int ade7759_initial_setup(struct ade7759_state *st)
@@ -404,7 +355,7 @@ static ssize_t ade7759_read_frequency(struct device *dev, 
		struct device_attribute *attr,

		char *buf)

{

	int ret, len = 0;

	int ret;

	u16 t;

	int sps;

	ret = ade7759_spi_read_reg_16(dev,
@@ -416,8 +367,7 @@ static ssize_t ade7759_read_frequency(struct device *dev, 
	t = (t >> 3) & 0x3;

	sps = 27900 / (1 + t);



	len = sprintf(buf, "%d SPS\n", sps);

	return len;

	return sprintf(buf, "%d\n", sps);

}



static ssize_t ade7759_write_frequency(struct device *dev,
@@ -446,18 +396,14 @@ static ssize_t ade7759_write_frequency(struct device *dev, 
	else

		st->us->max_speed_hz = ADE7759_SPI_FAST;



	ret = ade7759_spi_read_reg_16(dev,

			ADE7759_MODE,

			&reg);

	ret = ade7759_spi_read_reg_16(dev, ADE7759_MODE, &reg);

	if (ret)

		goto out;



	reg &= ~(3 << 13);

	reg |= t << 13;



	ret = ade7759_spi_write_reg_16(dev,

			ADE7759_MODE,

			reg);

	ret = ade7759_spi_write_reg_16(dev, ADE7759_MODE, reg);



out:

	mutex_unlock(&indio_dev->mlock);
@@ -478,14 +424,6 @@ static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500"); 


static IIO_CONST_ATTR(name, "ade7759");



static struct attribute *ade7759_event_attributes[] = {

	NULL

};



static struct attribute_group ade7759_event_attribute_group = {

	.attrs = ade7759_event_attributes,

};



static struct attribute *ade7759_attributes[] = {

	&iio_dev_attr_temp_raw.dev_attr.attr,

	&iio_const_attr_temp_offset.dev_attr.attr,
@@ -517,7 +455,7 @@ static const struct attribute_group ade7759_attribute_group = { 


static int __devinit ade7759_probe(struct spi_device *spi)

{

	int ret, regdone = 0;

	int ret;

	struct ade7759_state *st = kzalloc(sizeof *st, GFP_KERNEL);

	if (!st) {

		ret =  -ENOMEM;
@@ -548,61 +486,26 @@ static int __devinit ade7759_probe(struct spi_device *spi) 


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

	st->indio_dev->num_interrupt_lines = 1;

	st->indio_dev->event_attrs = &ade7759_event_attribute_group;



	st->indio_dev->attrs = &ade7759_attribute_group;

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

	st->indio_dev->driver_module = THIS_MODULE;

	st->indio_dev->modes = INDIO_DIRECT_MODE;



	ret = ade7759_configure_ring(st->indio_dev);

	if (ret)

		goto error_free_dev;



	ret = iio_device_register(st->indio_dev);

	if (ret)

		goto error_unreg_ring_funcs;

	regdone = 1;



	ret = ade7759_initialize_ring(st->indio_dev->ring);

	if (ret) {

		printk(KERN_ERR "failed to initialize the ring\n");

		goto error_unreg_ring_funcs;

	}



	if (spi->irq) {

		ret = iio_register_interrupt_line(spi->irq,

				st->indio_dev,

				0,

				IRQF_TRIGGER_FALLING,

				"ade7759");

		if (ret)

			goto error_uninitialize_ring;



		ret = ade7759_probe_trigger(st->indio_dev);

		if (ret)

			goto error_unregister_line;

	}

		goto error_free_dev;



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

	ret = ade7759_initial_setup(st);

	if (ret)

		goto error_remove_trigger;

		goto error_unreg_dev;

	return 0;



error_remove_trigger:

	if (st->indio_dev->modes & INDIO_RING_TRIGGERED)

		ade7759_remove_trigger(st->indio_dev);

error_unregister_line:

	if (st->indio_dev->modes & INDIO_RING_TRIGGERED)

		iio_unregister_interrupt_line(st->indio_dev, 0);

error_uninitialize_ring:

	ade7759_uninitialize_ring(st->indio_dev->ring);

error_unreg_ring_funcs:

	ade7759_unconfigure_ring(st->indio_dev);

error_free_dev:

	if (regdone)



error_unreg_dev:

	iio_device_unregister(st->indio_dev);

	else

error_free_dev:

	iio_free_device(st->indio_dev);

error_free_tx:

	kfree(st->tx);
@@ -625,14 +528,6 @@ static int ade7759_remove(struct spi_device *spi) 
	if (ret)

		goto err_ret;



	flush_scheduled_work();



	ade7759_remove_trigger(indio_dev);

	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)

		iio_unregister_interrupt_line(indio_dev, 0);



	ade7759_uninitialize_ring(indio_dev->ring);

	ade7759_unconfigure_ring(indio_dev);

	iio_device_unregister(indio_dev);

	kfree(st->tx);

	kfree(st->rx);

drivers/staging/iio/meter/ade7759.h

+0 −65
Original line number Diff line number Diff line
@@ -41,82 +41,17 @@ 
/**

 * struct ade7759_state - device instance specific data

 * @us:			actual spi_device

 * @work_trigger_to_ring: bh for triggered event handling

 * @inter:		used to check if new interrupt has been triggered

 * @last_timestamp:	passing timestamp from th to bh of interrupt handler

 * @indio_dev:		industrial I/O device structure

 * @trig:		data ready trigger registered with iio

 * @tx:			transmit buffer

 * @rx:			recieve buffer

 * @buf_lock:		mutex to protect tx and rx

 **/

struct ade7759_state {

	struct spi_device		*us;

	struct work_struct		work_trigger_to_ring;

	s64				last_timestamp;

	struct iio_dev			*indio_dev;

	struct iio_trigger		*trig;

	u8				*tx;

	u8				*rx;

	struct mutex			buf_lock;

};

#if defined(CONFIG_IIO_RING_BUFFER) && defined(THIS_HAS_RING_BUFFER_SUPPORT)

/* At the moment triggers are only used for ring buffer

 * filling. This may change!

 */



enum ade7759_scan {

	ADE7759_SCAN_ACTIVE_POWER,

	ADE7759_SCAN_CH1_CH2,

	ADE7759_SCAN_CH1,

	ADE7759_SCAN_CH2,

};



void ade7759_remove_trigger(struct iio_dev *indio_dev);

int ade7759_probe_trigger(struct iio_dev *indio_dev);



ssize_t ade7759_read_data_from_ring(struct device *dev,

		struct device_attribute *attr,

		char *buf);





int ade7759_configure_ring(struct iio_dev *indio_dev);

void ade7759_unconfigure_ring(struct iio_dev *indio_dev);



int ade7759_initialize_ring(struct iio_ring_buffer *ring);

void ade7759_uninitialize_ring(struct iio_ring_buffer *ring);

#else /* CONFIG_IIO_RING_BUFFER */



static inline void ade7759_remove_trigger(struct iio_dev *indio_dev)

{

}

static inline int ade7759_probe_trigger(struct iio_dev *indio_dev)

{

	return 0;

}



static inline ssize_t

ade7759_read_data_from_ring(struct device *dev,

		struct device_attribute *attr,

		char *buf)

{

	return 0;

}



static int ade7759_configure_ring(struct iio_dev *indio_dev)

{

	return 0;

}

static inline void ade7759_unconfigure_ring(struct iio_dev *indio_dev)

{

}

static inline int ade7759_initialize_ring(struct iio_ring_buffer *ring)

{

	return 0;

}

static inline void ade7759_uninitialize_ring(struct iio_ring_buffer *ring)

{

}

#endif /* CONFIG_IIO_RING_BUFFER */



#endif