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staging:iio:accel:adis16204 allocate tx and rx in state plus state via iio_priv 

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 2011-06-27 13:07:12 +01:00 committed by Greg Kroah-Hartman
parent 6a0d8090a6
commit 4de66bbb3e
4 changed files with 44 additions and 71 deletions
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12
drivers/staging/iio/accel/adis16204.h
View File

@ -67,19 +67,17 @@
/**
* struct adis16204_state - device instance specific data
* @us: actual spi_device
* @indio_dev: industrial I/O device structure
* @trig: data ready trigger registered with iio
* @tx: transmit buffer
* @rx: receive buffer
* @buf_lock: mutex to protect tx and rx
**/
struct adis16204_state {
struct spi_device *us;
struct iio_dev *indio_dev;
struct iio_trigger *trig;
u8 *tx;
u8 *rx;
struct mutex buf_lock;
struct spi_device *us;
struct iio_trigger *trig;
struct mutex buf_lock;
u8 tx[ADIS16204_MAX_TX] ____cacheline_aligned;
u8 rx[ADIS16204_MAX_RX];
};
int adis16204_set_irq(struct iio_dev *indio_dev, bool enable);

84
drivers/staging/iio/accel/adis16204_core.c
View File

@ -39,7 +39,7 @@ static int adis16204_spi_write_reg_8(struct iio_dev *indio_dev,
u8 val)
{
int ret;
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
struct adis16204_state *st = iio_priv(indio_dev);
mutex_lock(&st->buf_lock);
st->tx[0] = ADIS16204_WRITE_REG(reg_address);
@ -64,7 +64,7 @@ static int adis16204_spi_write_reg_16(struct iio_dev *indio_dev,
{
int ret;
struct spi_message msg;
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
struct adis16204_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
@ -106,7 +106,7 @@ static int adis16204_spi_read_reg_16(struct iio_dev *indio_dev,
u16 *val)
{
struct spi_message msg;
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
struct adis16204_state *st = iio_priv(indio_dev);
int ret;
struct spi_transfer xfers[] = {
{
@ -483,52 +483,38 @@ static const struct iio_info adis16204_info = {
static int __devinit adis16204_probe(struct spi_device *spi)
{
int ret, regdone = 0;
struct adis16204_state *st = kzalloc(sizeof *st, GFP_KERNEL);
if (!st) {
ret = -ENOMEM;
struct adis16204_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;
}
st = iio_priv(indio_dev);
/* this is only used for removal purposes */
spi_set_drvdata(spi, st);
/* Allocate the comms buffers */
st->rx = kzalloc(sizeof(*st->rx)*ADIS16204_MAX_RX, GFP_KERNEL);
if (st->rx == NULL) {
ret = -ENOMEM;
goto error_free_st;
}
st->tx = kzalloc(sizeof(*st->tx)*ADIS16204_MAX_TX, GFP_KERNEL);
if (st->tx == NULL) {
ret = -ENOMEM;
goto error_free_rx;
}
spi_set_drvdata(spi, 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 = &adis16204_info;
st->indio_dev->channels = adis16204_channels;
st->indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
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 = &adis16204_info;
indio_dev->channels = adis16204_channels;
indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
ret = adis16204_configure_ring(st->indio_dev);
ret = adis16204_configure_ring(indio_dev);
if (ret)
goto error_free_dev;
ret = iio_device_register(st->indio_dev);
ret = iio_device_register(indio_dev);
if (ret)
goto error_unreg_ring_funcs;
regdone = 1;
ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
adis16204_channels,
ARRAY_SIZE(adis16204_channels));
if (ret) {
@ -537,50 +523,40 @@ static int __devinit adis16204_probe(struct spi_device *spi)
}
if (spi->irq) {
ret = adis16204_probe_trigger(st->indio_dev);
ret = adis16204_probe_trigger(indio_dev);
if (ret)
goto error_uninitialize_ring;
}
/* Get the device into a sane initial state */
ret = adis16204_initial_setup(st->indio_dev);
ret = adis16204_initial_setup(indio_dev);
if (ret)
goto error_remove_trigger;
return 0;
error_remove_trigger:
adis16204_remove_trigger(st->indio_dev);
adis16204_remove_trigger(indio_dev);
error_uninitialize_ring:
iio_ring_buffer_unregister(st->indio_dev->ring);
iio_ring_buffer_unregister(indio_dev->ring);
error_unreg_ring_funcs:
adis16204_unconfigure_ring(st->indio_dev);
adis16204_unconfigure_ring(indio_dev);
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;
}
static int adis16204_remove(struct spi_device *spi)
{
struct adis16204_state *st = spi_get_drvdata(spi);
struct iio_dev *indio_dev = st->indio_dev;
struct iio_dev *indio_dev = spi_get_drvdata(spi);
adis16204_remove_trigger(indio_dev);
iio_ring_buffer_unregister(st->indio_dev->ring);
iio_ring_buffer_unregister(indio_dev->ring);
iio_device_unregister(indio_dev);
adis16204_unconfigure_ring(indio_dev);
kfree(st->tx);
kfree(st->rx);
kfree(st);
return 0;
}

8
drivers/staging/iio/accel/adis16204_ring.c
View File

@ -26,7 +26,7 @@ static int adis16204_read_ring_data(struct device *dev, u8 *rx)
{
struct spi_message msg;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
struct adis16204_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[ADIS16204_OUTPUTS + 1];
int ret;
int i;
@ -66,7 +66,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->private_data;
struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
struct adis16204_state *st = iio_priv(indio_dev);
struct iio_ring_buffer *ring = indio_dev->ring;
int i = 0;
s16 *data;
@ -79,7 +79,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
}
if (ring->scan_count)
if (adis16204_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
if (adis16204_read_ring_data(&indio_dev->dev, st->rx) >= 0)
for (; i < ring->scan_count; i++)
data[i] = be16_to_cpup(
(__be16 *)&(st->rx[i*2]));
@ -90,7 +90,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
ring->access->store_to(ring, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(st->indio_dev->trig);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
return IRQ_HANDLED;

11
drivers/staging/iio/accel/adis16204_trigger.c
View File

@ -18,17 +18,16 @@
static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
struct adis16204_state *st = trig->private_data;
struct iio_dev *indio_dev = st->indio_dev;
struct iio_dev *indio_dev = trig->private_data;
dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
return adis16204_set_irq(st->indio_dev, state);
return adis16204_set_irq(indio_dev, state);
}
int adis16204_probe_trigger(struct iio_dev *indio_dev)
{
int ret;
struct adis16204_state *st = indio_dev->dev_data;
struct adis16204_state *st = iio_priv(indio_dev);
st->trig = iio_allocate_trigger("adis16204-dev%d", indio_dev->id);
if (st->trig == NULL) {
@ -46,7 +45,7 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
st->trig->dev.parent = &st->us->dev;
st->trig->owner = THIS_MODULE;
st->trig->private_data = st;
st->trig->private_data = indio_dev;
st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
ret = iio_trigger_register(st->trig);
@ -67,7 +66,7 @@ error_ret:
void adis16204_remove_trigger(struct iio_dev *indio_dev)
{
struct adis16204_state *state = indio_dev->dev_data;
struct adis16204_state *state = iio_priv(indio_dev);
iio_trigger_unregister(state->trig);
free_irq(state->us->irq, state->trig);