linux-kernel - [PATCH 1/2] iio: mtk-auxadc: add support IIO_CHAN_INFO

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Date:   Thu, 12 Aug 2021 10:23:41 +0800
From:   Hui Liu <hui.liu@...iatek.com>
To:     <robh+dt@...nel.org>, <jic23@...nel.org>, <lars@...afoo.de>,
        <pmeerw@...erw.net>
CC:     <srv_heupstream@...iatek.com>, <hui.liu@...iatek.com>,
        <zhiyong.tao@...iatek.com>, <chun-hung.wu@...iatek.com>,
        <yingjoe.chen@...iatek.com>, <seiya.wang@...iatek.com>,
        <matthias.bgg@...il.com>, <s.hauer@...gutronix.de>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-iio@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>
Subject: [PATCH 1/2] iio: mtk-auxadc: add support IIO_CHAN_INFO_RAW case

Add support IIO_CHAN_INFO_RAW case.

Signed-off-by: Hui Liu <hui.liu@...iatek.com>
---
 drivers/iio/adc/mt6577_auxadc.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 79c1dd68b909..e995d43287b2 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -60,7 +60,8 @@ static const struct mtk_auxadc_compatible mt6765_compat = {
 		.type = IIO_VOLTAGE,				    \
 		.indexed = 1,					    \
 		.channel = (idx),				    \
-		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	    \
+				      BIT(IIO_CHAN_INFO_PROCESSED), \
 }
 
 static const struct iio_chan_spec mt6577_auxadc_iio_channels[] = {
@@ -181,6 +182,19 @@ static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev,
 	struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
 
 	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		*val = mt6577_auxadc_read(indio_dev, chan);
+		if (*val < 0) {
+			dev_notice(indio_dev->dev.parent,
+				"failed to sample data on channel[%d]\n",
+				chan->channel);
+			return *val;
+		}
+		if (adc_dev->dev_comp->sample_data_cali)
+			*val = mt_auxadc_get_cali_data(*val, true);
+
+		return IIO_VAL_INT;
+
 	case IIO_CHAN_INFO_PROCESSED:
 		*val = mt6577_auxadc_read(indio_dev, chan);
 		if (*val < 0) {
-- 
2.18.0