linux-kernel - [PATCH 1/2] iio: adc: qcom-pm8xxx-xoadc: add support for reading channel labels

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Message-Id: <20251028-pm8xxx-xoadc-fix-v1-1-b000e1036e41@smankusors.com>
Date: Mon, 27 Oct 2025 17:29:16 +0000 (UTC)
From: Antony Kurniawan Soemardi <linux@...nkusors.com>
To: Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Antony Kurniawan Soemardi <linux@...nkusors.com>
Subject: [PATCH 1/2] iio: adc: qcom-pm8xxx-xoadc: add support for reading
 channel labels

This allows user-space tools to identify ADC channels by name through
the IIO sysfs interface.

Signed-off-by: Antony Kurniawan Soemardi <linux@...nkusors.com>
---
 drivers/iio/adc/qcom-pm8xxx-xoadc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index 31f88cf7f7f18297132d152648b312c0fb60608e..8555f34036fb13c41ac720dc02c1dc39876e9198 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -725,8 +725,15 @@ static int pm8xxx_fwnode_xlate(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
+static int pm8xxx_read_label(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan, char *label)
+{
+	return sysfs_emit(label, "%s\n", chan->datasheet_name);
+}
+
 static const struct iio_info pm8xxx_xoadc_info = {
 	.fwnode_xlate = pm8xxx_fwnode_xlate,
+	.read_label = pm8xxx_read_label,
 	.read_raw = pm8xxx_read_raw,
 };
 

-- 
2.34.1