On Tue, Nov 13, 2012 at 04:44:42PM +0100, Andrew Lunn wrote: > A few of the Kirkwood systems use a GPIO line to turn the power off on > shutdown. They request the GPIO line in the board setup code, > optionally setting it as an output and driving it inactive. They then > register a function for pm_power_off. At the end of the shutdown, this > function is called. The GPIO line is configured as an output, if not > already so, and then driven active. In order to cover the use case of > edges rather then levels, triggering power off, the GPIO line is then > toggled active and later inactive. This should allow the driver to be > used by PXA which also has boards using the same scheme. > > The driver code was initially developed by Jamie Lentin and extended > to cover the PXA case by Andrew Lunn. > > v1 -> v2: Moved to drivers/power/reset > > Andrew Lunn (2): > ARM: Kirkwood: Convert DNSKW to use gpio-poweroff. > ARM: Kirkwood: Convert IB62x0 to use gpio-poweroff. > > Jamie Lentin (1): > power: Add simple poweroff-gpio driver > > .../devicetree/bindings/gpio/gpio-poweroff.txt | 22 ++++ > arch/arm/boot/dts/kirkwood-dnskw.dtsi | 5 + > arch/arm/boot/dts/kirkwood-ib62x0.dts | 6 + > arch/arm/mach-kirkwood/Kconfig | 4 + > arch/arm/mach-kirkwood/board-dnskw.c | 12 -- > arch/arm/mach-kirkwood/board-ib62x0.c | 13 -- > drivers/power/Kconfig | 3 + > drivers/power/Makefile | 1 + > drivers/power/reset/Kconfig | 15 +++ > drivers/power/reset/Makefile | 1 + > drivers/power/reset/gpio-poweroff.c | 129 > ++++++++++++++++++++ > 11 files changed, 186 insertions(+), 25 deletions(-) > create mode 100644 Documentation/devicetree/bindings/gpio/gpio-poweroff.txt > create mode 100644 drivers/power/reset/Kconfig > create mode 100644 drivers/power/reset/Makefile > create mode 100644 drivers/power/reset/gpio-poweroff.c
Anton, Is it ok if we take this through the arm-soc tree with your Ack? thx, Jason. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
