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author | Beniamin Bia <beniamin.bia@analog.com> | 2019-05-27 15:56:48 +0300 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-06-16 16:45:22 +0100 |
commit | 3c23e9e8085308d7d960b920af145938a103ddc5 (patch) | |
tree | e862dee771f7a390ebea1cf87b7bd3d3a98b2e7d /drivers/iio/adc | |
parent | 88dd03135063b0f60efda064f7ecccdef57b0634 (diff) | |
download | linux-3c23e9e8085308d7d960b920af145938a103ddc5.tar.gz linux-3c23e9e8085308d7d960b920af145938a103ddc5.tar.bz2 linux-3c23e9e8085308d7d960b920af145938a103ddc5.zip |
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/iio/adc')
-rw-r--r-- | drivers/iio/adc/ad7606.c | 40 | ||||
-rw-r--r-- | drivers/iio/adc/ad7606.h | 2 |
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; |