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authorBeniamin Bia <beniamin.bia@analog.com>2019-05-27 15:56:48 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-06-16 16:45:22 +0100
commit3c23e9e8085308d7d960b920af145938a103ddc5 (patch)
treee862dee771f7a390ebea1cf87b7bd3d3a98b2e7d /drivers
parent88dd03135063b0f60efda064f7ecccdef57b0634 (diff)
download96b-common-3c23e9e8085308d7d960b920af145938a103ddc5.tar.gz
iio: adc: ad7606: Add software configuration
Because this driver will support multiple configurations for software, the software configuration was made generic. Signed-off-by: Beniamin Bia <beniamin.bia@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/iio/adc/ad7606.c40
-rw-r--r--drivers/iio/adc/ad7606.h2
2 files changed, 39 insertions, 3 deletions
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index c66ff22f32d2..aba0fd123a51 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -140,7 +140,7 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
int *val2,
long m)
{
- int ret;
+ int ret, ch = 0;
struct ad7606_state *st = iio_priv(indio_dev);
switch (m) {
@@ -157,8 +157,10 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
*val = (short)ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
+ if (st->sw_mode_en)
+ ch = chan->address;
*val = 0;
- *val2 = st->scale_avail[st->range[0]];
+ *val2 = st->scale_avail[st->range[ch]];
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
*val = st->oversampling;
@@ -233,7 +235,9 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_SCALE:
mutex_lock(&st->lock);
i = find_closest(val2, st->scale_avail, st->num_scales);
- ret = st->write_scale(indio_dev, chan->address, i);
+ if (st->sw_mode_en)
+ ch = chan->address;
+ ret = st->write_scale(indio_dev, ch, i);
if (ret < 0) {
mutex_unlock(&st->lock);
return ret;
@@ -616,6 +620,36 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
st->write_scale = ad7606_write_scale_hw;
st->write_os = ad7606_write_os_hw;
+ if (st->chip_info->sw_mode_config)
+ st->sw_mode_en = device_property_present(st->dev,
+ "adi,sw-mode");
+
+ if (st->sw_mode_en) {
+ /* After reset, in software mode, ±10 V is set by default */
+ memset32(st->range, 2, ARRAY_SIZE(st->range));
+ indio_dev->info = &ad7606_info_os_and_range;
+
+ /*
+ * In software mode, the range gpio has no longer its function.
+ * Instead, the scale can be configured individually for each
+ * channel from the range registers.
+ */
+ if (st->chip_info->write_scale_sw)
+ st->write_scale = st->chip_info->write_scale_sw;
+
+ /*
+ * In software mode, the oversampling is no longer configured
+ * with GPIO pins. Instead, the oversampling can be configured
+ * in configuratiion register.
+ */
+ if (st->chip_info->write_os_sw)
+ st->write_os = st->chip_info->write_os_sw;
+
+ ret = st->chip_info->sw_mode_config(indio_dev);
+ if (ret < 0)
+ return ret;
+ }
+
st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
indio_dev->name, indio_dev->id);
if (!st->trig)
diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
index 143c30163df9..d8a509c2c428 100644
--- a/drivers/iio/adc/ad7606.h
+++ b/drivers/iio/adc/ad7606.h
@@ -43,6 +43,7 @@ struct ad7606_chip_info {
* @range voltage range selection, selects which scale to apply
* @oversampling oversampling selection
* @base_address address from where to read data in parallel operation
+ * @sw_mode_en software mode enabled
* @scale_avail pointer to the array which stores the available scales
* @num_scales number of elements stored in the scale_avail array
* @oversampling_avail pointer to the array which stores the available
@@ -71,6 +72,7 @@ struct ad7606_state {
unsigned int range[16];
unsigned int oversampling;
void __iomem *base_address;
+ bool sw_mode_en;
const unsigned int *scale_avail;
unsigned int num_scales;
const unsigned int *oversampling_avail;