diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2015-08-12 10:22:41 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-08-16 10:51:25 +0100 |
| commit | a0175b9c76f59c1f5706f986d690e27ba06363dd (patch) | |
| tree | dcd09779295650a6f97d62a4858cb2c32ea3d545 /drivers/iio/common | |
| parent | 8d96fc276aaec449871bcb86cef41f3187136f0a (diff) | |
iio: st_sensors: add debugfs register read hook
This adds a debugfs hook to read/write registers in the ST
sensors using debugfs. Proved to be awesome help when trying
to debug why IRQs do not arrive.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/common')
| -rw-r--r-- | drivers/iio/common/st_sensors/st_sensors_core.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c index 2e7fdb502645..25258e2c1a82 100644 --- a/drivers/iio/common/st_sensors/st_sensors_core.c +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -44,6 +44,28 @@ st_sensors_write_data_with_mask_error: return err; } +int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, + unsigned reg, unsigned writeval, + unsigned *readval) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + u8 readdata; + int err; + + if (!readval) + return sdata->tf->write_byte(&sdata->tb, sdata->dev, + (u8)reg, (u8)writeval); + + err = sdata->tf->read_byte(&sdata->tb, sdata->dev, (u8)reg, &readdata); + if (err < 0) + return err; + + *readval = (unsigned)readdata; + + return 0; +} +EXPORT_SYMBOL(st_sensors_debugfs_reg_access); + static int st_sensors_match_odr(struct st_sensor_settings *sensor_settings, unsigned int odr, struct st_sensor_odr_avl *odr_out) { |