On Mon, 27 May 2019 15:56:48 +0300
Beniamin Bia <beniamin.bia@xxxxxxxxxx> wrote:
> Because this driver will support multiple configurations for software,
> the software configuration was made generic.
>
> Signed-off-by: Beniamin Bia <beniamin.bia@xxxxxxxxxx>
> Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
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;
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