[U-Boot] [PATCH v1 01/18] MIPS: Prepare device-tree support.

[Marek Vasut]

On Thursday, December 17, 2015 at 06:28:08 PM, Purna Chandra Mandal wrote:
> Signed-off-by: Purna Chandra Mandal <purna.mandal at microchip.com>
> ---
> 
>  arch/Kconfig                      |  1 +
>  arch/mips/config.mk               |  3 +++
>  arch/mips/dts/.gitignore          |  1 +
>  arch/mips/dts/Makefile            | 16 ++++++++++++++++
>  arch/mips/dts/include/dt-bindings |  1 +
>  arch/mips/dts/skeleton.dtsi       | 21 +++++++++++++++++++++
>  dts/Makefile                      |  2 +-
>  7 files changed, 44 insertions(+), 1 deletion(-)
>  create mode 100644 arch/mips/dts/.gitignore
>  create mode 100644 arch/mips/dts/Makefile
>  create mode 120000 arch/mips/dts/include/dt-bindings
>  create mode 100644 arch/mips/dts/skeleton.dtsi
> 
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 6489cc9..589fc47 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -54,6 +54,7 @@ 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 52e28f2..d4d688e 100644
> --- a/arch/mips/config.mk
> +++ b/arch/mips/config.mk
> @@ -70,3 +70,6 @@ PLATFORM_RELFLAGS        += -ffunction-sections
> -fdata-sections LDFLAGS_FINAL            += --gc-sections -pie
>  OBJCOPYFLAGS            += -j .text -j .rodata -j .data -j .got
>  OBJCOPYFLAGS            += -j .u_boot_list -j .rel.dyn -j .padding
> +ifdef CONFIG_OF_EMBED
> +OBJCOPYFLAGS            += -j .dtb.init.rodata
> +endif
> 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..724b5d2
> --- /dev/null
> +++ b/arch/mips/dts/Makefile
> @@ -0,0 +1,16 @@
> +#
> +# SPDX-License-Identifier:    GPL-2.0+
> +#
> +
> +#dtb-$(CONFIG_XXX) += xxx.dtb

XXX ?

> +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/include/dt-bindings
> b/arch/mips/dts/include/dt-bindings new file mode 120000
> index 0000000..0cecb3d
> --- /dev/null
> +++ b/arch/mips/dts/include/dt-bindings
> @@ -0,0 +1 @@
> +../../../../include/dt-bindings
> \ No newline at end of file
> diff --git a/arch/mips/dts/skeleton.dtsi b/arch/mips/dts/skeleton.dtsi
> new file mode 100644
> index 0000000..ad41546
> --- /dev/null
> +++ b/arch/mips/dts/skeleton.dtsi
> @@ -0,0 +1,21 @@
> +/*
> + * Skeleton device tree; the bare minimum needed to boot; just include and
> + * add a compatible value.  The bootloader will typically populate the
> memory + * node.
> + */
> +
> +/ {
> +    #address-cells = <1>;
> +    #size-cells = <1>;
> +
> +    chosen {
> +    };
> +
> +    aliases {
> +    };
> +
> +    memory {
> +        device_type = "memory";
> +        reg = <0 0>;
> +    };

You don't need any of these nodes, do you ?

> +};
> diff --git a/dts/Makefile b/dts/Makefile
> index d3122aa..5c3a01f 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/sandbox/dts ../arch/x86/dts ../arch/mips/dts