[PATCH v2 0/3] powerpc: 512x: Convert ADS7845 touchscreen on PDM360NG to device tree

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

The reason for this series is to remove support for platform data in the
ads7846 touchscreen driver, as pdm360ng is the last user of legacy
platform data in the kernel for this driver.

This series converts the ADS7845 touchscreen on the PDM360NG board to use
Device Tree bindings instead of legacy platform data callbacks:

- Move GPIO controller capabilities into mpc5121.dtsi so all MPC5121
  boards inherit proper controller definitions, and remove redundant
  local declarations from ac14xx.dts

- Update pdm360ng.dts to use "ti,ads7845" with pendown-gpio and
  interrupt-parent referencing gpio_pic

- Add "ifm,pdm360ng" to mpc512x_generic.c and delete obsolete
  pdm360ng.c.

This change has been discussed in '24 but I just got around to
implementing this:

https://lore.kernel.org/r/ZoNHLjmSvCN12vU5@google.com/

Note that this should compile but I have not tried this on real
hardware.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
Changes in v2:
- Set pendown-gpio to GPIO_ACTIVE_LOW in pdm360ng.dts to match the
  active-low hardware pen-down signal
- Expanded commit description of patch 2 explaining why early boot setup
  in pdm360ng_penirq_init() is harmless prior to patch 3
- Removed Anatolij Gustschin since I got a bounce telling he's no longer
  with DENX
- Link to v1: https://lore.kernel.org/r/20260718-ads7846-pdm360ng-v1-0-f318f85cda57@gmail.com

---
Dmitry Torokhov (3):
      powerpc/dts: mpc5121: Move GPIO controller properties to SoC dtsi
      powerpc/dts: pdm360ng: Convert ADS7845 touchscreen to DT bindings
      powerpc/512x: Remove pdm360ng platform setup in favor of mpc512x_generic

 arch/powerpc/boot/dts/ac14xx.dts              |  13 ---
 arch/powerpc/boot/dts/mpc5121.dtsi            |   6 +-
 arch/powerpc/boot/dts/pdm360ng.dts            |   8 +-
 arch/powerpc/platforms/512x/Kconfig           |   3 +-
 arch/powerpc/platforms/512x/Makefile          |   1 -
 arch/powerpc/platforms/512x/mpc512x_generic.c |   1 +
 arch/powerpc/platforms/512x/pdm360ng.c        | 126 --------------------------
 7 files changed, 13 insertions(+), 145 deletions(-)
---
base-commit: 8e9685d3c41c35dd1b37df70d854137abcb2fbac
change-id: 20260717-ads7846-pdm360ng-ec7ed9f72f82

Thanks.

-- 
Dmitry