Hi Sebastian, On Wed, May 20, 2020 at 05:39:35PM +0200, Sebastian Reichel wrote: > Expose model and fw_version via sysfs. Also query the model > in probe to make sure, that the I2C communication with the > device works before successfully probing the driver. > > This is a bit complicated, since EETI devices do not have > a sync interface. Sending the commands and directly reading > does not work. Sending the command and waiting for some time > is also not an option, since there might be touch events in > the mean time. > > Last but not least we do not cache the results, since this > interface can be used to check the I2C communication is still > working as expected. > > Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> > --- > .../ABI/testing/sysfs-driver-input-exc3000 | 15 ++ > drivers/input/touchscreen/exc3000.c | 145 +++++++++++++++++- > 2 files changed, 159 insertions(+), 1 deletion(-) > create mode 100644 Documentation/ABI/testing/sysfs-driver-input-exc3000 > > diff --git a/Documentation/ABI/testing/sysfs-driver-input-exc3000 b/Documentation/ABI/testing/sysfs-driver-input-exc3000 > new file mode 100644 > index 000000000000..d79da4f869af > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-driver-input-exc3000 > @@ -0,0 +1,15 @@ > +What: /sys/class/input/inputX/fw_version > +Date: May 2020 > +Contact: linux-input@xxxxxxxxxxxxxxx > +Description: Reports the firmware version provided by the touchscreen, for example "00_T6" on a EXC80H60 > + > + Access: Read > + Valid values: Represented as string > + > +What: /sys/class/input/inputX/model > +Date: May 2020 > +Contact: linux-input@xxxxxxxxxxxxxxx > +Description: Reports the model identification provided by the touchscreen, for example "Orion_1320" on a EXC80H60 > + > + Access: Read > + Valid values: Represented as string These are properties of the controller (i2c device), not input abstraction class on top of it, so the attributes should be attached to i2c_client instance. Please use devm_device_add_group() in probe to instantiate them at the proper level. Thanks. -- Dmitry
