Am Montag, den 11.01.2016, 16:55 +0530 schrieb Purna Chandra Mandal:
> On 12/20/2015 04:13 AM, Daniel Schwierzeck wrote:
> > Prepare sub-folder for device-tree files. Make support for
> > device-tree on MIPS available in Kbuild/Kconfig.
> >
> > Signed-off-by: Daniel Schwierzeck <daniel.schwierz...@gmail.com>
> > Signed-off-by: Purna Chandra Mandal <purna.man...@microchip.com>
> >
> >
> > ---
> >
> > Changes in v2:
> > - add arch/mips/dts to clean list in dts/Makefile
> > - keep section .dtb during link in case of CONFIG_OF_EMBED
> >
> > arch/Kconfig | 1 +
> > arch/mips/config.mk | 2 +-
> > arch/mips/dts/.gitignore | 1 +
> > arch/mips/dts/Makefile | 16 ++++++++++++++++
> > arch/mips/dts/skeleton.dtsi | 23 +++++++++++++++++++++++
> > dts/Makefile | 2 +-
> > 6 files changed, 43 insertions(+), 2 deletions(-)
> > create mode 100644 arch/mips/dts/.gitignore
> > create mode 100644 arch/mips/dts/Makefile
> > create mode 100644 arch/mips/dts/skeleton.dtsi
> >
> > diff --git a/arch/Kconfig b/arch/Kconfig
> > index 1709d40..ec12013 100644
> > --- a/arch/Kconfig
> > +++ b/arch/Kconfig
> > @@ -55,6 +55,7 @@ config MIPS
> > select HAVE_PRIVATE_LIBGCC
> > select HAVE_GENERIC_BOARD
> > select SYS_GENERIC_BOARD
> > + select SUPPORT_OF_CONTROL
> >
> > config NDS32
> > bool "NDS32 architecture"
> > diff --git a/arch/mips/config.mk b/arch/mips/config.mk
> > index 415ec8a..3ebc202 100644
> > --- a/arch/mips/config.mk
> > +++ b/arch/mips/config.mk
> > @@ -71,7 +71,7 @@ else
> > PF_ABICALLS := -mabicalls
> > PF_PIC := -fpic
> > PF_PIE := -pie
> > -PF_OBJCOPY := -j .got -j .u_boot_list -j
> > .rel.dyn -j .padding
> > +PF_OBJCOPY := -j .got -j .u_boot_list -j
> > .rel.dyn -j .padding -j .dtb
> > endif
> >
>
> There is no section called '.dtb' in U-boot linker script, instead
> one generated by build script is named '.dtb.init.rodata'.
> Unless we add '-j .dtb.init.rodata' device-tree blob will not be
> copied to binary.
you are right. My thought was that all sub-sections are picked up by
objcopy. It works if I put a .dtb section to the linker script. I will
change to '-j .dtb.init.rodata', ARM does it in the same way.
>
> > PLATFORM_CPPFLAGS += -G 0 $(PF_ABICALLS) $(PF_PIC)
> > diff --git a/arch/mips/dts/.gitignore b/arch/mips/dts/.gitignore
> > new file mode 100644
> > index 0000000..b60ed20
> > --- /dev/null
> > +++ b/arch/mips/dts/.gitignore
> > @@ -0,0 +1 @@
> > +*.dtb
> > diff --git a/arch/mips/dts/Makefile b/arch/mips/dts/Makefile
> > new file mode 100644
> > index 0000000..47b6eb5
> > --- /dev/null
> > +++ b/arch/mips/dts/Makefile
> > @@ -0,0 +1,16 @@
> > +#
> > +# SPDX-License-Identifier: GPL-2.0+
> > +#
> > +
> > +dtb-y +=
> > +
> > +targets += $(dtb-y)
> > +
> > +# Add any required device tree compiler flags here
> > +DTC_FLAGS +=
> > +
> > +PHONY += dtbs
> > +dtbs: $(addprefix $(obj)/, $(dtb-y))
> > + @:
> > +
> > +clean-files := *.dtb
> > diff --git a/arch/mips/dts/skeleton.dtsi
> > b/arch/mips/dts/skeleton.dtsi
> > new file mode 100644
> > index 0000000..24ee6c3
> > --- /dev/null
> > +++ b/arch/mips/dts/skeleton.dtsi
> > @@ -0,0 +1,23 @@
> > +/*
> > + * Skeleton device tree; the bare minimum needed to boot; just
> > include and
> > + * add a compatible value. The bootloader will typically populate
> > the memory
> > + * node.
> > + *
> > + * SPDX-License-Identifier: GPL-2.0+
> > + */
> > +
> > +/ {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > +
> > + chosen {
> > + };
> > +
> > + aliases {
> > + };
> > +
> > + memory {
> > + device_type = "memory";
> > + reg = <0 0>;
> > + };
> > +};
> > diff --git a/dts/Makefile b/dts/Makefile
> > index d3122aa..c4ac153 100644
> > --- a/dts/Makefile
> > +++ b/dts/Makefile
> > @@ -45,4 +45,4 @@ dtbs: $(obj)/dt.dtb
> > clean-files := dt.dtb.S
> >
> > # Let clean descend into dts directories
> > -subdir- += ../arch/arm/dts ../arch/microblaze/dts
> > ../arch/sandbox/dts ../arch/x86/dts
> > +subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts
> > ../arch/sandbox/dts ../arch/x86/dts
>
--
- Daniel
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