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path: root/drivers/staging/iio/adc/ad7793.c
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Diffstat (limited to 'drivers/staging/iio/adc/ad7793.c')
-rw-r--r--drivers/staging/iio/adc/ad7793.c108
1 files changed, 42 insertions, 66 deletions
diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c
index 999f8f746cff..6a058b19c49a 100644
--- a/drivers/staging/iio/adc/ad7793.c
+++ b/drivers/staging/iio/adc/ad7793.c
@@ -20,7 +20,7 @@
#include "../iio.h"
#include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
#include "../ring_sw.h"
#include "../trigger.h"
#include "../trigger_consumer.h"
@@ -316,25 +316,6 @@ out:
return ret;
}
-static int ad7793_scan_from_ring(struct ad7793_state *st, unsigned ch, int *val)
-{
- struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;
- int ret;
- s64 dat64[2];
- u32 *dat32 = (u32 *)dat64;
-
- if (!(test_bit(ch, ring->scan_mask)))
- return -EBUSY;
-
- ret = ring->access->read_last(ring, (u8 *) &dat64);
- if (ret)
- return ret;
-
- *val = *dat32;
-
- return 0;
-}
-
static int ad7793_ring_preenable(struct iio_dev *indio_dev)
{
struct ad7793_state *st = iio_priv(indio_dev);
@@ -342,14 +323,15 @@ static int ad7793_ring_preenable(struct iio_dev *indio_dev)
size_t d_size;
unsigned channel;
- if (!ring->scan_count)
+ if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
return -EINVAL;
- channel = find_first_bit(ring->scan_mask,
+ channel = find_first_bit(indio_dev->active_scan_mask,
indio_dev->masklength);
- d_size = ring->scan_count *
- indio_dev->channels[0].scan_type.storagebits / 8;
+ d_size = bitmap_weight(indio_dev->active_scan_mask,
+ indio_dev->masklength) *
+ indio_dev->channels[0].scan_type.storagebits / 8;
if (ring->scan_timestamp) {
d_size += sizeof(s64);
@@ -411,7 +393,7 @@ static irqreturn_t ad7793_trigger_handler(int irq, void *p)
s64 dat64[2];
s32 *dat32 = (s32 *)dat64;
- if (ring->scan_count)
+ if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
__ad7793_read_reg(st, 1, 1, AD7793_REG_DATA,
dat32,
indio_dev->channels[0].scan_type.realbits/8);
@@ -459,7 +441,7 @@ static int ad7793_register_ring_funcs_and_init(struct iio_dev *indio_dev)
}
/* Ring buffer functions - here trigger setup related */
- indio_dev->buffer->setup_ops = &ad7793_ring_setup_ops;
+ indio_dev->setup_ops = &ad7793_ring_setup_ops;
/* Flag that polled ring buffering is possible */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
@@ -493,6 +475,10 @@ static irqreturn_t ad7793_data_rdy_trig_poll(int irq, void *private)
return IRQ_HANDLED;
}
+static struct iio_trigger_ops ad7793_trigger_ops = {
+ .owner = THIS_MODULE,
+};
+
static int ad7793_probe_trigger(struct iio_dev *indio_dev)
{
struct ad7793_state *st = iio_priv(indio_dev);
@@ -505,6 +491,7 @@ static int ad7793_probe_trigger(struct iio_dev *indio_dev)
ret = -ENOMEM;
goto error_ret;
}
+ st->trig->ops = &ad7793_trigger_ops;
ret = request_irq(st->spi->irq,
ad7793_data_rdy_trig_poll,
@@ -517,7 +504,6 @@ static int ad7793_probe_trigger(struct iio_dev *indio_dev)
disable_irq_nosync(st->spi->irq);
st->irq_dis = true;
st->trig->dev.parent = &st->spi->dev;
- st->trig->owner = THIS_MODULE;
st->trig->private_data = indio_dev;
ret = iio_trigger_register(st->trig);
@@ -649,8 +635,7 @@ static int ad7793_read_raw(struct iio_dev *indio_dev,
case 0:
mutex_lock(&indio_dev->mlock);
if (iio_buffer_enabled(indio_dev))
- ret = ad7793_scan_from_ring(st,
- chan->scan_index, &smpl);
+ ret = -EBUSY;
else
ret = ad7793_read(st, chan->address,
chan->scan_type.realbits / 8, &smpl);
@@ -667,19 +652,21 @@ static int ad7793_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
- case (1 << IIO_CHAN_INFO_SCALE_SHARED):
- *val = st->scale_avail[(st->conf >> 8) & 0x7][0];
- *val2 = st->scale_avail[(st->conf >> 8) & 0x7][1];
-
- return IIO_VAL_INT_PLUS_NANO;
-
- case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+ case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_VOLTAGE:
- /* 1170mV / 2^23 * 6 */
- scale_uv = (1170ULL * 100000000ULL * 6ULL)
- >> (chan->scan_type.realbits -
- (unipolar ? 0 : 1));
+ if (chan->differential) {
+ *val = st->
+ scale_avail[(st->conf >> 8) & 0x7][0];
+ *val2 = st->
+ scale_avail[(st->conf >> 8) & 0x7][1];
+ return IIO_VAL_INT_PLUS_NANO;
+ } else {
+ /* 1170mV / 2^23 * 6 */
+ scale_uv = (1170ULL * 100000000ULL * 6ULL)
+ >> (chan->scan_type.realbits -
+ (unipolar ? 0 : 1));
+ }
break;
case IIO_TEMP:
/* Always uses unity gain and internal ref */
@@ -716,7 +703,7 @@ static int ad7793_write_raw(struct iio_dev *indio_dev,
}
switch (mask) {
- case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ case IIO_CHAN_INFO_SCALE:
ret = -EINVAL;
for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
if (val2 == st->scale_avail[i][1]) {
@@ -775,7 +762,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 0,
.channel2 = 0,
.address = AD7793_CH_AIN1P_AIN1M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 0,
.scan_type = IIO_ST('s', 24, 32, 0)
},
@@ -786,7 +773,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 1,
.channel2 = 1,
.address = AD7793_CH_AIN2P_AIN2M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 1,
.scan_type = IIO_ST('s', 24, 32, 0)
},
@@ -797,7 +784,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 2,
.channel2 = 2,
.address = AD7793_CH_AIN3P_AIN3M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 2,
.scan_type = IIO_ST('s', 24, 32, 0)
},
@@ -809,7 +796,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 2,
.channel2 = 2,
.address = AD7793_CH_AIN1M_AIN1M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 2,
.scan_type = IIO_ST('s', 24, 32, 0)
},
@@ -818,7 +805,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.indexed = 1,
.channel = 0,
.address = AD7793_CH_TEMP,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+ .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
.scan_index = 4,
.scan_type = IIO_ST('s', 24, 32, 0),
},
@@ -828,7 +815,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.indexed = 1,
.channel = 4,
.address = AD7793_CH_AVDD_MONITOR,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+ .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
.scan_index = 5,
.scan_type = IIO_ST('s', 24, 32, 0),
},
@@ -842,7 +829,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 0,
.channel2 = 0,
.address = AD7793_CH_AIN1P_AIN1M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 0,
.scan_type = IIO_ST('s', 16, 32, 0)
},
@@ -853,7 +840,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 1,
.channel2 = 1,
.address = AD7793_CH_AIN2P_AIN2M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 1,
.scan_type = IIO_ST('s', 16, 32, 0)
},
@@ -864,7 +851,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 2,
.channel2 = 2,
.address = AD7793_CH_AIN3P_AIN3M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 2,
.scan_type = IIO_ST('s', 16, 32, 0)
},
@@ -876,7 +863,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.channel = 2,
.channel2 = 2,
.address = AD7793_CH_AIN1M_AIN1M,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+ .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
.scan_index = 2,
.scan_type = IIO_ST('s', 16, 32, 0)
},
@@ -885,7 +872,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.indexed = 1,
.channel = 0,
.address = AD7793_CH_TEMP,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+ .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
.scan_index = 4,
.scan_type = IIO_ST('s', 16, 32, 0),
},
@@ -895,7 +882,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
.indexed = 1,
.channel = 4,
.address = AD7793_CH_AVDD_MONITOR,
- .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+ .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
.scan_index = 5,
.scan_type = IIO_ST('s', 16, 32, 0),
},
@@ -1034,29 +1021,18 @@ static const struct spi_device_id ad7793_id[] = {
{"ad7793", ID_AD7793},
{}
};
+MODULE_DEVICE_TABLE(spi, ad7793_id);
static struct spi_driver ad7793_driver = {
.driver = {
.name = "ad7793",
- .bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = ad7793_probe,
.remove = __devexit_p(ad7793_remove),
.id_table = ad7793_id,
};
-
-static int __init ad7793_init(void)
-{
- return spi_register_driver(&ad7793_driver);
-}
-module_init(ad7793_init);
-
-static void __exit ad7793_exit(void)
-{
- spi_unregister_driver(&ad7793_driver);
-}
-module_exit(ad7793_exit);
+module_spi_driver(ad7793_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD7792/3 ADC");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.