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Commit 89c07b9b authored by Shilpa Suresh's avatar Shilpa Suresh
Browse files

iio: spmi-vadc: Add option to specify scale-fn-type in devicetree 



There are chances that some signals would share the same ADC
channel but have different scale functions. Add an option to
specify scale-fn-type in devicetree to handle such kind of
requirements. Also modify the channel info mask to include
IIO_CHAN_INFO_PROCESSED bit if the scale-fn-type is specified
in the device tree.

Change-Id: Ib9a7c73a2cdab5e4288b3a83c2437d7e22c34636
Signed-off-by: default avatarShilpa Suresh <sbsure@codeaurora.org>
parent a2e940bc

drivers/iio/adc/qcom-spmi-vadc.c

+19 −2
Original line number Diff line number Diff line
@@ -727,6 +727,12 @@ static int vadc_get_dt_channel_data(struct device *dev, 
	else

		prop->calibration = VADC_CALIB_ABSOLUTE;



	prop->scale_fn_type = -EINVAL;

	ret = of_property_read_u32(node, "qcom,scale-fn-type", &value);



	if (!ret && value < SCALE_HW_CALIB_MAX)

		prop->scale_fn_type = value;



	dev_dbg(dev, "%02x name %s\n", chan, name);



	return 0;
@@ -739,6 +745,7 @@ static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node) 
	struct vadc_channel_prop prop;

	struct device_node *child;

	unsigned int index = 0;

	bool scale_fn_type_from_dt = false;

	int ret;



	vadc->nchannels = of_get_available_child_count(node);
@@ -764,14 +771,24 @@ static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node) 
			return ret;

		}



		prop.scale_fn_type = vadc_chans[prop.channel].scale_fn_type;

		if (prop.scale_fn_type == -EINVAL) {

			prop.scale_fn_type =

				vadc_chans[prop.channel].scale_fn_type;

		} else {

			scale_fn_type_from_dt = true;

		}



		vadc->chan_props[index] = prop;



		vadc_chan = &vadc_chans[prop.channel];



		iio_chan->channel = prop.channel;

		iio_chan->datasheet_name = vadc_chan->datasheet_name;

		if (!scale_fn_type_from_dt)

			iio_chan->info_mask_separate = vadc_chan->info_mask;

		else

			iio_chan->info_mask_separate =

			  vadc_chan->info_mask | BIT(IIO_CHAN_INFO_PROCESSED);

		iio_chan->type = vadc_chan->type;

		iio_chan->indexed = 1;

		iio_chan->address = index++;