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iio:adc:ad799x: Only expose event interface when IRQ is available

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an IRQ is necessary to handle the ALERT condition; without
IRQ, the IIO event interface serves no purpose

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald 2014-12-06 05:54:00 +00:00 committed by Jonathan Cameron
parent e1c6e2a217
commit 91556c6939
1 changed files with 179 additions and 86 deletions
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265
drivers/iio/adc/ad799x.c
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@ -101,22 +101,32 @@ enum {
};
/**
* struct ad799x_chip_info - chip specific information
* struct ad799x_chip_config - chip specific information
* @channel: channel specification
* @num_channels: number of channels
* @default_config: device default configuration
* @info: pointer to iio_info struct
*/
struct ad799x_chip_info {
struct ad799x_chip_config {
struct iio_chan_spec channel[9];
int num_channels;
u16 default_config;
const struct iio_info *info;
};
/**
* struct ad799x_chip_info - chip specific information
* @num_channels: number of channels
* @noirq_config: device configuration w/o IRQ
* @irq_config: device configuration w/IRQ
*/
struct ad799x_chip_info {
int num_channels;
const struct ad799x_chip_config noirq_config;
const struct ad799x_chip_config irq_config;
};
struct ad799x_state {
struct i2c_client *client;
const struct ad799x_chip_info *chip_info;
const struct ad799x_chip_config *chip_config;
struct regulator *reg;
struct regulator *vref;
unsigned id;
@ -446,7 +456,13 @@ static const struct iio_info ad7991_info = {
.driver_module = THIS_MODULE,
};
static const struct iio_info ad7993_4_7_8_info = {
static const struct iio_info ad7993_4_7_8_noirq_info = {
.read_raw = &ad799x_read_raw,
.driver_module = THIS_MODULE,
.update_scan_mode = ad7997_8_update_scan_mode,
};
static const struct iio_info ad7993_4_7_8_irq_info = {
.read_raw = &ad799x_read_raw,
.event_attrs = &ad799x_event_attrs_group,
.read_event_config = &ad799x_read_event_config,
@ -501,103 +517,175 @@ static const struct iio_event_spec ad799x_events[] = {
static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
[ad7991] = {
.channel = {
AD799X_CHANNEL(0, 12),
AD799X_CHANNEL(1, 12),
AD799X_CHANNEL(2, 12),
AD799X_CHANNEL(3, 12),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.num_channels = 5,
.info = &ad7991_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 12),
AD799X_CHANNEL(1, 12),
AD799X_CHANNEL(2, 12),
AD799X_CHANNEL(3, 12),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.info = &ad7991_info,
},
},
[ad7995] = {
.channel = {
AD799X_CHANNEL(0, 10),
AD799X_CHANNEL(1, 10),
AD799X_CHANNEL(2, 10),
AD799X_CHANNEL(3, 10),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.num_channels = 5,
.info = &ad7991_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 10),
AD799X_CHANNEL(1, 10),
AD799X_CHANNEL(2, 10),
AD799X_CHANNEL(3, 10),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.info = &ad7991_info,
},
},
[ad7999] = {
.channel = {
AD799X_CHANNEL(0, 8),
AD799X_CHANNEL(1, 8),
AD799X_CHANNEL(2, 8),
AD799X_CHANNEL(3, 8),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.num_channels = 5,
.info = &ad7991_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 8),
AD799X_CHANNEL(1, 8),
AD799X_CHANNEL(2, 8),
AD799X_CHANNEL(3, 8),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.info = &ad7991_info,
},
},
[ad7992] = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 12),
AD799X_CHANNEL_WITH_EVENTS(1, 12),
IIO_CHAN_SOFT_TIMESTAMP(3),
},
.num_channels = 3,
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 12),
AD799X_CHANNEL(1, 12),
IIO_CHAN_SOFT_TIMESTAMP(3),
},
.info = &ad7993_4_7_8_noirq_info,
},
.irq_config = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 12),
AD799X_CHANNEL_WITH_EVENTS(1, 12),
IIO_CHAN_SOFT_TIMESTAMP(3),
},
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_irq_info,
},
},
[ad7993] = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 10),
AD799X_CHANNEL_WITH_EVENTS(1, 10),
AD799X_CHANNEL_WITH_EVENTS(2, 10),
AD799X_CHANNEL_WITH_EVENTS(3, 10),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.num_channels = 5,
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 10),
AD799X_CHANNEL(1, 10),
AD799X_CHANNEL(2, 10),
AD799X_CHANNEL(3, 10),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.info = &ad7993_4_7_8_noirq_info,
},
.irq_config = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 10),
AD799X_CHANNEL_WITH_EVENTS(1, 10),
AD799X_CHANNEL_WITH_EVENTS(2, 10),
AD799X_CHANNEL_WITH_EVENTS(3, 10),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_irq_info,
},
},
[ad7994] = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 12),
AD799X_CHANNEL_WITH_EVENTS(1, 12),
AD799X_CHANNEL_WITH_EVENTS(2, 12),
AD799X_CHANNEL_WITH_EVENTS(3, 12),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.num_channels = 5,
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 12),
AD799X_CHANNEL(1, 12),
AD799X_CHANNEL(2, 12),
AD799X_CHANNEL(3, 12),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.info = &ad7993_4_7_8_noirq_info,
},
.irq_config = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 12),
AD799X_CHANNEL_WITH_EVENTS(1, 12),
AD799X_CHANNEL_WITH_EVENTS(2, 12),
AD799X_CHANNEL_WITH_EVENTS(3, 12),
IIO_CHAN_SOFT_TIMESTAMP(4),
},
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_irq_info,
},
},
[ad7997] = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 10),
AD799X_CHANNEL_WITH_EVENTS(1, 10),
AD799X_CHANNEL_WITH_EVENTS(2, 10),
AD799X_CHANNEL_WITH_EVENTS(3, 10),
AD799X_CHANNEL(4, 10),
AD799X_CHANNEL(5, 10),
AD799X_CHANNEL(6, 10),
AD799X_CHANNEL(7, 10),
IIO_CHAN_SOFT_TIMESTAMP(8),
},
.num_channels = 9,
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 10),
AD799X_CHANNEL(1, 10),
AD799X_CHANNEL(2, 10),
AD799X_CHANNEL(3, 10),
AD799X_CHANNEL(4, 10),
AD799X_CHANNEL(5, 10),
AD799X_CHANNEL(6, 10),
AD799X_CHANNEL(7, 10),
IIO_CHAN_SOFT_TIMESTAMP(8),
},
.info = &ad7993_4_7_8_noirq_info,
},
.irq_config = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 10),
AD799X_CHANNEL_WITH_EVENTS(1, 10),
AD799X_CHANNEL_WITH_EVENTS(2, 10),
AD799X_CHANNEL_WITH_EVENTS(3, 10),
AD799X_CHANNEL(4, 10),
AD799X_CHANNEL(5, 10),
AD799X_CHANNEL(6, 10),
AD799X_CHANNEL(7, 10),
IIO_CHAN_SOFT_TIMESTAMP(8),
},
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_irq_info,
},
},
[ad7998] = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 12),
AD799X_CHANNEL_WITH_EVENTS(1, 12),
AD799X_CHANNEL_WITH_EVENTS(2, 12),
AD799X_CHANNEL_WITH_EVENTS(3, 12),
AD799X_CHANNEL(4, 12),
AD799X_CHANNEL(5, 12),
AD799X_CHANNEL(6, 12),
AD799X_CHANNEL(7, 12),
IIO_CHAN_SOFT_TIMESTAMP(8),
},
.num_channels = 9,
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_info,
.noirq_config = {
.channel = {
AD799X_CHANNEL(0, 12),
AD799X_CHANNEL(1, 12),
AD799X_CHANNEL(2, 12),
AD799X_CHANNEL(3, 12),
AD799X_CHANNEL(4, 12),
AD799X_CHANNEL(5, 12),
AD799X_CHANNEL(6, 12),
AD799X_CHANNEL(7, 12),
IIO_CHAN_SOFT_TIMESTAMP(8),
},
.info = &ad7993_4_7_8_noirq_info,
},
.irq_config = {
.channel = {
AD799X_CHANNEL_WITH_EVENTS(0, 12),
AD799X_CHANNEL_WITH_EVENTS(1, 12),
AD799X_CHANNEL_WITH_EVENTS(2, 12),
AD799X_CHANNEL_WITH_EVENTS(3, 12),
AD799X_CHANNEL(4, 12),
AD799X_CHANNEL(5, 12),
AD799X_CHANNEL(6, 12),
AD799X_CHANNEL(7, 12),
IIO_CHAN_SOFT_TIMESTAMP(8),
},
.default_config = AD7998_ALERT_EN,
.info = &ad7993_4_7_8_irq_info,
},
},
};
@ -607,6 +695,8 @@ static int ad799x_probe(struct i2c_client *client,
int ret;
struct ad799x_state *st;
struct iio_dev *indio_dev;
const struct ad799x_chip_info *chip_info =
&ad799x_chip_info_tbl[id->driver_data];
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
if (indio_dev == NULL)
@ -617,8 +707,11 @@ static int ad799x_probe(struct i2c_client *client,
i2c_set_clientdata(client, indio_dev);
st->id = id->driver_data;
st->chip_info = &ad799x_chip_info_tbl[st->id];
st->config = st->chip_info->default_config;
if (client->irq > 0 && chip_info->irq_config.info)
st->chip_config = &chip_info->irq_config;
else
st->chip_config = &chip_info->noirq_config;
st->config = st->chip_config->default_config;
/* TODO: Add pdata options for filtering and bit delay */
@ -641,11 +734,11 @@ static int ad799x_probe(struct i2c_client *client,
indio_dev->dev.parent = &client->dev;
indio_dev->name = id->name;
indio_dev->info = st->chip_info->info;
indio_dev->info = st->chip_config->info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = st->chip_info->channel;
indio_dev->num_channels = st->chip_info->num_channels;
indio_dev->channels = st->chip_config->channel;
indio_dev->num_channels = chip_info->num_channels;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
&ad799x_trigger_handler, NULL);