mbox series

[v2,0/6] Nintendo Wii GPIO driver

Message ID 20180122050411.32460-1-j.neuschaefer@gmx.net
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Series Nintendo Wii GPIO driver | expand

Message

J. Neuschäfer Jan. 22, 2018, 5:04 a.m. UTC 
This series adds a driver for the GPIO controller used in the Nintendo
Wii game console.

The driver itself, and the related devicetree work should be pretty
uncontroversial, but due to the system architecture of the Wii, I also
had to extend an old resource allocation hack to kernel/resource.c: On
the Wii, there are two separate RAM ranges, with MMIO right in the
middle, but AFAIK, Linux on PPC32 doesn't support discontiguous memory
properly. So the hack is to allocate one big RAM range with a hole
(marked as reserved memory) for MMIO in the middle.

Because this series touches different subsystems (GPIO, DT, core
resource management), I guess it should be picked up patch-by-patch by
the different maintainers.

The main difference between v2 and the previous version is that I
rewrote the driver on top of the GPIO_GENERIC library, saving 60 lines
of code.

Jonathan Neuschäfer (6):
  resource: Extend the PPC32 reserved memory hack
  powerpc: wii: Explicitly configure GPIO owner for poweroff pin
  gpio: Add GPIO driver for Nintendo Wii
  dt-bindings: gpio: Add binding for Wii GPIO controller
  powerpc: wii.dts: Add ngpios property
  powerpc: wii.dts: Add GPIO line names

 .../bindings/gpio/nintendo,hollywood-gpio.txt      |  27 +++++
 .../devicetree/bindings/powerpc/nintendo/wii.txt   |   9 +-
 arch/powerpc/boot/dts/wii.dts                      |   9 ++
 arch/powerpc/platforms/embedded6xx/wii.c           |   7 ++
 drivers/gpio/Kconfig                               |   9 ++
 drivers/gpio/Makefile                              |   1 +
 drivers/gpio/gpio-hlwd.c                           | 123 +++++++++++++++++++++
 kernel/resource.c                                  |  21 +++-
 8 files changed, 197 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/gpio/nintendo,hollywood-gpio.txt
 create mode 100644 drivers/gpio/gpio-hlwd.c