MIPS: add initial infrastructure for device-tree files

Prepare sub-folder for device-tree files. Make support for
device-tree on MIPS available in Kbuild/Kconfig.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>

diff --git a/arch/Kconfig b/arch/Kconfig
index 1709d40e97e09922f31b5a201b381667ce1600ad..ec120139cba9619a5fa971ceaee2add268325f89 100644 (file)
--- 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 415ec8afd2d7016f7d87379a1ab491a3907644e9..b78d4953ba215c0a8a11fa1884b7bb521c8e0ac0 100644 (file)
--- a/arch/mips/config.mk
+++ b/arch/mips/config.mk
@@ -72,6 +72,7 @@ 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 .dtb.init.rodata
 endif
 
 PLATFORM_CPPFLAGS              += -G 0 $(PF_ABICALLS) $(PF_PIC)

diff --git a/arch/mips/dts/.gitignore b/arch/mips/dts/.gitignore
new file mode 100644 (file)
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 (file)
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/include/dt-bindings b/arch/mips/dts/include/dt-bindings
new file mode 120000 (symlink)
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 (file)
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 d3122aa3b96eeaa8820300060c958bcb5cf1d6dd..c4ac153ef3602bf6f2a66128d3bb63a3ffbcb416 100644 (file)
--- 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