Re: [PATCH v5 0/6] auxdisplay: Add support for the Titanmec TM1628 7 segment display controller

[Heiner Kallweit <hkallweit1@gmail.com>]

On 25.02.2022 22:09, Heiner Kallweit wrote:
> This series adds support for the Titanmec TM1628 7 segment display
> controller. It's based on previous RFC work from Andreas Färber.
> The RFC version placed the driver in the LED subsystem, but this was
> NAK'ed by the LED maintainer. Therefore I moved the driver to
> /drivers/auxdisplay what seems most reasonable to me.
> 
> Further changes to the RFC version:
> - Driver can be built also w/o LED class support, for displays that
>   don't have any symbols to be exposed as LED's.
> - Simplified the code and rewrote a lot of it.
> - Driver is now kind of a MVP, but functionality should be sufficient
>   for most use cases.
> - Use the existing 7 segment support in uapi/linux/map_to_7segment.h
>   as suggested by Geert Uytterhoeven.
> 
> Note: There's a number of chips from other manufacturers that are
>       almost identical, e.g. FD628, SM1628. Only difference I saw so
>       far is that they partially support other display modes.
>       TM1628: 6x12, 7x11
>       SM1628C: 4x13, 5x12, 6x11, 7x10
>       For typical displays on devices using these chips this
>       difference shouldn't matter.
> 
> Successfully tested on a TX3 Mini TV box that has an SM1628C and a
> display with 4 digits and 7 symbols.
> 
> v2:
> - (re-)add Andreas' SoB to two patches
> - fix YAML issues
> - include ctype.h explicitly
> - add info message in probe()
> 
> v3:
> - remove patch 1 because it has been applied via the SPI tree already
> - fix remaining YAML issues in patch 2
> - follow Miguel's suggestion on usage of Co-Developed-by
> 
> v4:
> - add patch for MAINTAINERS entry
> - incorporate Miguel's review comments
> - Replace Co-Developed-by with Co-developed-by (checkpatch)
> v5:
> - add vendor prefix to driver-specific dt properties
> 
> Andreas Färber (1):
>   dt-bindings: vendor-prefixes: Add Titan Micro Electronics
> 
> Heiner Kallweit (5):
>   dt-bindings: auxdisplay: Add Titan Micro Electronics TM1628
>   docs: ABI: document tm1628 attribute display-text
>   auxdisplay: add support for Titanmec TM1628 7 segment display
>     controller
>   arm64: dts: meson-gxl-s905w-tx3-mini: add support for the 7 segment
>     display
>   MAINTAINERS: Add entry for tm1628 auxdisplay driver
> 
>  .../testing/sysfs-devices-auxdisplay-tm1628   |   7 +
>  .../bindings/auxdisplay/titanmec,tm1628.yaml  |  92 +++++
>  .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
>  MAINTAINERS                                   |   7 +
>  .../dts/amlogic/meson-gxl-s905w-tx3-mini.dts  |  59 +++
>  drivers/auxdisplay/Kconfig                    |  11 +
>  drivers/auxdisplay/Makefile                   |   1 +
>  drivers/auxdisplay/tm1628.c                   | 376 ++++++++++++++++++
>  8 files changed, 555 insertions(+)
>  create mode 100644 Documentation/ABI/testing/sysfs-devices-auxdisplay-tm1628
>  create mode 100644 Documentation/devicetree/bindings/auxdisplay/titanmec,tm1628.yaml
>  create mode 100644 drivers/auxdisplay/tm1628.c
> 

Hi Miguel,

the DT extensions have been acked/reviewed.
Any other feedback from your side? Or can it be applied as-is?

Heiner

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