linux-kernel - [PATCH] iio: imu: inv_mpu6050: add debugfs register r/w interface

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Message-ID: <5e730c2f.1c69fb81.9eda3.5c70@mx.google.com>
Date:   Thu, 19 Mar 2020 11:37:39 +0530
From:   Rohit Sarkar <rohitsarkar5398@...il.com>
To:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Jean-Baptiste Maneyrol <jmaneyrol@...ensense.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] iio: imu: inv_mpu6050: add debugfs register r/w interface

The iio debugfs interface provides direct access to read and write device
registers if debugfs is enabled.

Signed-off-by: Rohit Sarkar <rohitsarkar5398@...il.com>
---
 drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 7cb9ff3d3e94..3f40db8ea9e2 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -1248,12 +1248,26 @@ static const struct attribute_group inv_attribute_group = {
 	.attrs = inv_attributes
 };
 
+static int inv_mpu6050_reg_access(struct iio_dev *indio_dev,
+				  unsigned int reg,
+				  unsigned int writeval,
+				  unsigned int *readval)
+{
+	struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+	if (readval)
+		return regmap_read(st->map, reg, readval);
+	else
+		return regmap_write(st->map, reg, writeval);
+}
+
 static const struct iio_info mpu_info = {
 	.read_raw = &inv_mpu6050_read_raw,
 	.write_raw = &inv_mpu6050_write_raw,
 	.write_raw_get_fmt = &inv_write_raw_get_fmt,
 	.attrs = &inv_attribute_group,
 	.validate_trigger = inv_mpu6050_validate_trigger,
+	.debugfs_reg_access = &inv_mpu6050_reg_access
 };
 
 /**
-- 
2.23.0.385.gbc12974a89