# \[PATCHv2 0/8\] gpio: move ppc4xx driver to drivers/gpio and modernize

- From: Rosen Penev \<hidden\>
- Date: 2026-08-03 22:35:42 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2026/08/17360366
- Thread: https://ratatoskr.run/linux-gpio/2026/08/17360366/t.md

```text
This series moves the ppc4xx GPIO driver from arch/powerpc to
drivers/gpio, converts it to be a proper platform driver using
generic MMIO helpers, drops architecture-specific accessors, and
prepares it for module build and COMPILE_TEST.

v2: use guard(), reorganize a bit for clarity.

Rosen Penev (8):
  gpio: move ppc4xx gpio driver from arch/powerpc to drivers/gpio
  gpio: ppc44x: update all 4xx to 44x
  gpio: ppc44x: Use module platform driver helper for GPIO
  gpio: ppc44x: Use platform resource helper for GPIO MMIO
  gpio: ppc44x: Convert GPIO to generic MMIO
  gpio: ppc44x: drop PPC-specific IO helpers
  gpio: ppc44x: fix undefined behavior in GPIO_MASK2 macro
  gpio: ppc44x: use dev_name() for chip label

 arch/powerpc/configs/44x/warp_defconfig |   2 +-
 arch/powerpc/configs/ppc44x_defconfig   |   2 +-
 arch/powerpc/platforms/44x/Kconfig      |   7 -
 arch/powerpc/platforms/44x/Makefile     |   2 +-
 arch/powerpc/platforms/44x/gpio.c       | 211 ------------------------
 drivers/gpio/Kconfig                    |   7 +
 drivers/gpio/Makefile                   |   1 +
 drivers/gpio/gpio-ppc44x.c              | 208 +++++++++++++++++++++++
 8 files changed, 219 insertions(+), 221 deletions(-)
 delete mode 100644 arch/powerpc/platforms/44x/gpio.c
 create mode 100644 drivers/gpio/gpio-ppc44x.c

-- 
2.55.0


```