Signed-off-by: Martin Fuzzey <mfuzzey@xxxxxxxxxxx>
---
drivers/iio/accel/mma8452.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 001a7db..877ce29 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -34,6 +34,8 @@
#define MMA8452_CTRL_REG2 0x2b
#define MMA8452_CTRL_REG2_RST BIT(6)
+#define MMA8452_MAX_REG 0x31
+
#define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0))
#define MMA8452_CTRL_DR_MASK (BIT(5) | BIT(4) | BIT(3))
@@ -292,6 +294,28 @@ done:
return IRQ_HANDLED;
}
+static int mma8452_reg_access_dbg(struct iio_dev *indio_dev,
+ unsigned reg, unsigned writeval,
+ unsigned *readval)
+{
+ int ret;
+ struct mma8452_data *data = iio_priv(indio_dev);
+
+ if (reg > MMA8452_MAX_REG)
+ return -EINVAL;
+
+ if (!readval)
+ return mma8452_change_config(data, reg, writeval);
+
+ ret = i2c_smbus_read_byte_data(data->client, reg);
+ if (ret < 0)
+ return ret;
+
+ *readval = ret;
+
+ return 0;
+}
+
#define MMA8452_CHANNEL(axis, idx) { \
.type = IIO_ACCEL, \
.modified = 1, \
@@ -331,6 +355,7 @@ static const struct iio_info mma8452_info = {
.attrs = &mma8452_group,
.read_raw = &mma8452_read_raw,
.write_raw = &mma8452_write_raw,
+ .debugfs_reg_access = &mma8452_reg_access_dbg,
.driver_module = THIS_MODULE,
};
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