Re: [PATCH 6/6] Input: mms114 - refactor chip variant handling using descriptors

[Bryam Vargas]

Hi Dmitry,

The descriptor refactor looks good -- it preserves the per-variant behaviour
(event size, config-reg gating, get_version, fuzz handling) for all five chips.

One user-visible side effect worth a line in the changelog though: switching
input_dev->name from "MELFAS MMS%d" (the enum value) to "MELFAS %s" (chip->name)
changes the reported name for the two variants whose part number carries a
non-numeric suffix:

  MMS134S:  "MELFAS MMS134 Touchscreen"  ->  "MELFAS MMS134S Touchscreen"
  MMS345L:  "MELFAS MMS345 Touchscreen"  ->  "MELFAS MMS345L Touchscreen"

(MMS114/136/152 are byte-identical.) The old "%d" on the enum silently dropped
the S/L. That string is userspace-visible via EVIOCGNAME, /sys/class/input/*/name
and /proc/bus/input/devices, so any udev/hwdb/libinput rule keyed on the old name
would stop matching. The in-tree boards affected are ste-ux500-samsung-kyle
(melfas,mms134s) and msm8916-samsung-a5u-eur / msm8916-samsung-e5 (melfas,mms345l).

The new names are more correct, so this is just worth a heads-up in the commit
message rather than a code change -- in case an out-of-tree quirk keys on the old
truncated strings.

Thanks,
Bryam