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path: root/drivers/staging/iio/adc/ad7476_core.c
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Diffstat (limited to 'drivers/staging/iio/adc/ad7476_core.c')
-rw-r--r--drivers/staging/iio/adc/ad7476_core.c173
1 files changed, 76 insertions, 97 deletions
diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c
index d263904b3d1d..50cedb422839 100644
--- a/drivers/staging/iio/adc/ad7476_core.c
+++ b/drivers/staging/iio/adc/ad7476_core.c
@@ -6,13 +6,10 @@
* Licensed under the GPL-2 or later.
*/
-#include <linux/interrupt.h>
-#include <linux/workqueue.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
-#include <linux/list.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
@@ -35,117 +32,97 @@ static int ad7476_scan_direct(struct ad7476_state *st)
return (st->data[0] << 8) | st->data[1];
}
-static ssize_t ad7476_scan(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int ad7476_read_raw(struct iio_dev *dev_info,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7476_state *st = dev_info->dev_data;
int ret;
-
- mutex_lock(&dev_info->mlock);
- if (iio_ring_enabled(dev_info))
- ret = ad7476_scan_from_ring(st);
- else
- ret = ad7476_scan_direct(st);
- mutex_unlock(&dev_info->mlock);
-
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", (ret >> st->chip_info->res_shift) &
- RES_MASK(st->chip_info->bits));
-}
-static IIO_DEV_ATTR_IN_RAW(0, ad7476_scan, 0);
-
-static ssize_t ad7476_show_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- /* Driver currently only support internal vref */
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7476_state *st = iio_dev_get_devdata(dev_info);
- /* Corresponds to Vref / 2^(bits) */
- unsigned int scale_uv = (st->int_vref_mv * 1000) >> st->chip_info->bits;
-
- return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7476_show_scale, NULL, 0);
-
-static ssize_t ad7476_show_name(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct ad7476_state *st = iio_dev_get_devdata(dev_info);
-
- return sprintf(buf, "%s\n", spi_get_device_id(st->spi)->name);
+ struct ad7476_state *st = dev_info->dev_data;
+ unsigned int scale_uv;
+
+ switch (m) {
+ case 0:
+ mutex_lock(&dev_info->mlock);
+ if (iio_ring_enabled(dev_info))
+ ret = ad7476_scan_from_ring(st);
+ else
+ ret = ad7476_scan_direct(st);
+ mutex_unlock(&dev_info->mlock);
+
+ if (ret < 0)
+ return ret;
+ *val = (ret >> st->chip_info->channel[0].scan_type.shift) &
+ RES_MASK(st->chip_info->channel[0].scan_type.realbits);
+ return IIO_VAL_INT;
+ case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ scale_uv = (st->int_vref_mv * 1000)
+ >> st->chip_info->channel[0].scan_type.realbits;
+ *val = scale_uv/1000;
+ *val2 = (scale_uv%1000)*1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
}
-static IIO_DEVICE_ATTR(name, S_IRUGO, ad7476_show_name, NULL, 0);
-
-static struct attribute *ad7476_attributes[] = {
- &iio_dev_attr_in0_raw.dev_attr.attr,
- &iio_dev_attr_in_scale.dev_attr.attr,
- &iio_dev_attr_name.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group ad7476_attribute_group = {
- .attrs = ad7476_attributes,
-};
static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
[ID_AD7466] = {
- .bits = 12,
- .storagebits = 16,
- .res_shift = 0,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 12, 16, 0), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7467] = {
- .bits = 10,
- .storagebits = 16,
- .res_shift = 2,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 10, 16, 2), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7468] = {
- .bits = 8,
- .storagebits = 16,
- .res_shift = 4,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1 , 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 8, 16, 4), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7475] = {
- .bits = 12,
- .storagebits = 16,
- .res_shift = 0,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 12, 16, 0), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7476] = {
- .bits = 12,
- .storagebits = 16,
- .res_shift = 0,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 12, 16, 0), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7477] = {
- .bits = 10,
- .storagebits = 16,
- .res_shift = 2,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 10, 16, 2), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7478] = {
- .bits = 8,
- .storagebits = 16,
- .res_shift = 4,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 8, 16, 4), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7495] = {
- .bits = 12,
- .storagebits = 16,
- .res_shift = 0,
+ .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+ (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ 0, 0, IIO_ST('u', 12, 16, 0), 0),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
.int_vref_mv = 2500,
- .sign = IIO_SCAN_EL_TYPE_UNSIGNED,
},
};
+static const struct iio_info ad7476_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &ad7476_read_raw,
+};
+
static int __devinit ad7476_probe(struct spi_device *spi)
{
struct ad7476_platform_data *pdata = spi->dev.platform_data;
@@ -181,10 +158,9 @@ static int __devinit ad7476_probe(struct spi_device *spi)
spi_set_drvdata(spi, st);
- atomic_set(&st->protect_ring, 0);
st->spi = spi;
- st->indio_dev = iio_allocate_device();
+ st->indio_dev = iio_allocate_device(0);
if (st->indio_dev == NULL) {
ret = -ENOMEM;
goto error_disable_reg;
@@ -192,15 +168,16 @@ static int __devinit ad7476_probe(struct spi_device *spi)
/* Establish that the iio_dev is a child of the spi device */
st->indio_dev->dev.parent = &spi->dev;
- st->indio_dev->attrs = &ad7476_attribute_group;
+ st->indio_dev->name = spi_get_device_id(spi)->name;
st->indio_dev->dev_data = (void *)(st);
- st->indio_dev->driver_module = THIS_MODULE;
st->indio_dev->modes = INDIO_DIRECT_MODE;
-
+ st->indio_dev->channels = st->chip_info->channel;
+ st->indio_dev->num_channels = 2;
+ st->indio_dev->info = &ad7476_info;
/* Setup default message */
st->xfer.rx_buf = &st->data;
- st->xfer.len = st->chip_info->storagebits / 8;
+ st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8;
spi_message_init(&st->msg);
spi_message_add_tail(&st->xfer, &st->msg);
@@ -213,7 +190,9 @@ static int __devinit ad7476_probe(struct spi_device *spi)
if (ret)
goto error_free_device;
- ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
+ ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+ st->chip_info->channel,
+ ARRAY_SIZE(st->chip_info->channel));
if (ret)
goto error_cleanup_ring;
return 0;
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