linux-kernel - [PATCH v4 18/19] iio: accel: bma220: add debugfs reg access

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Message-Id: <20251005-b4-bma220_improvements-v4-18-0f449ba31585@subdimension.ro>
Date: Sun, 05 Oct 2025 16:12:27 +0300
From: Petre Rodan <petre.rodan@...dimension.ro>
To: Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH v4 18/19] iio: accel: bma220: add debugfs reg access

Allow read/write access to sensor registers for use in unit-tests.

Signed-off-by: Petre Rodan <petre.rodan@...dimension.ro>
---
v1->v4 no change
---
 drivers/iio/accel/bma220_core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_core.c
index 7109759e28397d2660f17707124a8803a254cb14..0d6c301b1c47a04cfca5bae157f8ce6144f0b854 100644
--- a/drivers/iio/accel/bma220_core.c
+++ b/drivers/iio/accel/bma220_core.c
@@ -375,10 +375,21 @@ static int bma220_read_avail(struct iio_dev *indio_dev,
 	}
 }
 
+static int bma220_reg_access(struct iio_dev *indio_dev, unsigned int reg,
+			     unsigned int writeval, unsigned int *readval)
+{
+	struct bma220_data *data = iio_priv(indio_dev);
+
+	if (readval)
+		return regmap_read(data->regmap, reg, readval);
+	return regmap_write(data->regmap, reg, writeval);
+}
+
 static const struct iio_info bma220_info = {
 	.read_raw		= bma220_read_raw,
 	.write_raw		= bma220_write_raw,
 	.read_avail		= bma220_read_avail,
+	.debugfs_reg_access	= &bma220_reg_access,
 };
 
 static int bma220_reset(struct bma220_data *data, bool up)

-- 
2.49.1