| Message ID | 20190527125650.2405-2-beniamin.bia@analog.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/4] iio: adc: ad7606: Move oversampling and scale options to chip info | expand |
On Mon, 27 May 2019 15:56:48 +0300 Beniamin Bia <beniamin.bia@analog.com> wrote: > Because this driver will support multiple configurations for software, > the software configuration was made generic. > > Signed-off-by: Beniamin Bia <beniamin.bia@analog.com> > Acked-by: Jonathan Cameron <jic23@kernel.org> Applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to poke at it. Thanks, Jonathan > --- > Changes in v2: > -nothing changed > > drivers/iio/adc/ad7606.c | 40 +++++++++++++++++++++++++++++++++++++--- > 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;
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;