Previous commit used pr_err/pr_debug because it mistakenly assumed that
the device pointer was not available. This ensures that the driver uses
the dev_err and dev_dbg functions wherever it can.
err macro has been removed entirely from the Linux kernel starting from
around v3.5, while the dbg macro has been deprecated. Since the lines
that were using err/dbg did not have access to the device, simply log as
a generic kernel log.
The le32_to_cpu function doesn't quite work for some reason. Manually
writing the 32-bit conversion seems to fix the axes reporting for
ABS_X, ABS_Y and ABS_RZ.
This still could use a bit of investigation to see why
input_set_abs_params called with non-zero values for fuzz and flat
causes axis motion to be ignored, although it may be a driver
subsystem issue in Linux.
Due to plans to scrap the kernel module approach and go with a full-fledged
userspace application, this commit renames the driver folder to kernel_module
so the folder contents are clear.
nirenjan