iio: accel: adxl345: add debug register access

Add the possibility to verify the content of the configuration
registers of the sensor in preparation for upcomming feature
implementations.

Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://patch.msgid.link/20250220104234.40958-3-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
index e2f65d8278d5d7e005b37cce3d8901451cd05be5..fedf0d41d36b742f1add807e69fdb35a81e13b6c 100644 (file)
--- a/drivers/iio/accel/adxl345_core.c
+++ b/drivers/iio/accel/adxl345_core.c
@@ -202,6 +202,16 @@ static int adxl345_write_raw(struct iio_dev *indio_dev,
        return -EINVAL;
 }
 
+static int adxl345_reg_access(struct iio_dev *indio_dev, unsigned int reg,
+                             unsigned int writeval, unsigned int *readval)
+{
+       struct adxl345_state *st = iio_priv(indio_dev);
+
+       if (readval)
+               return regmap_read(st->regmap, reg, readval);
+       return regmap_write(st->regmap, reg, writeval);
+}
+
 static int adxl345_set_watermark(struct iio_dev *indio_dev, unsigned int value)
 {
        struct adxl345_state *st = iio_priv(indio_dev);
@@ -467,6 +477,7 @@ static const struct iio_info adxl345_info = {
        .read_raw       = adxl345_read_raw,
        .write_raw      = adxl345_write_raw,
        .write_raw_get_fmt      = adxl345_write_raw_get_fmt,
+       .debugfs_reg_access = &adxl345_reg_access,
        .hwfifo_set_watermark = adxl345_set_watermark,
 };