On Sunday 19 June 2011 13:43:28 Jonas Bonn wrote: > > The OpenRISC architecture uses the device tree infrastructure for the > platform description. This is currently limited to having a device tree > built into the kernel, but work is underway within the OpenRISC project > to define how this device tree blob should be passed into the kernel from > an external resource. > > Signed-off-by: Jonas Bonn <[email protected]>
Best take [email protected] when posting this again. > --- > arch/openrisc/boot/dts/aac.dts | 290 > +++++++++++++++++++++++++++++++++++++ > arch/openrisc/boot/dts/atlys.dts | 94 ++++++++++++ > arch/openrisc/boot/dts/system.dts | 88 +++++++++++ > arch/openrisc/include/asm/prom.h | 92 ++++++++++++ > arch/openrisc/kernel/prom.c | 109 ++++++++++++++ > 5 files changed, 673 insertions(+), 0 deletions(-) > create mode 100644 arch/openrisc/boot/dts/aac.dts > create mode 100644 arch/openrisc/boot/dts/atlys.dts > create mode 100644 arch/openrisc/boot/dts/system.dts > create mode 100644 arch/openrisc/include/asm/prom.h > create mode 100644 arch/openrisc/kernel/prom.c > > diff --git a/arch/openrisc/boot/dts/aac.dts b/arch/openrisc/boot/dts/aac.dts > new file mode 100644 > index 0000000..d9e724f > --- /dev/null > +++ b/arch/openrisc/boot/dts/aac.dts > @@ -0,0 +1,290 @@ > +/dts-v1/; > +/ { > + compatible = "orsoc,development-board"; > + #size-cells = <1>; > + #address-cells = <1>; > + > + chosen { > + bootargs = "console=uart,mmio,0x90000000,115200 lpj=200000 > debug"; > +/* bootargs = "console=uart,mmio,0x90000000,115200 lpj=200000 > root=/dev/nfs rw > nfsroot=172.30.0.1:/home/jonas/local/opencores/linux-2.6/arch/or32/support/rootfs,rw,nolock > ip=172.30.0.2::::::"; */ > + }; I think having a hardcoded command line here is not really helpful, this should normally be filled by the bootloader. The console settings should probably be probed from the device tree, we have good existing bindings for serial ports. For the lpj value, I would also recommend passing the clock frequency in the device tree in a generic form, so you can compute the delay loop settings from it. Arnd _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
