Commit a9f75ac5 authored by Rabin Vincent's avatar Rabin Vincent Committed by Jesper Nilsson
Browse files

CRISv32: add device tree support 



Add support for booting CRISv32 with a built-in device tree.

Signed-off-by: default avatarRabin Vincent <rabin@rab.in>
Signed-off-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
parent 43f7071e

arch/cris/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -54,6 +54,8 @@ config CRIS 
	select OLD_SIGACTION

	select ARCH_REQUIRE_GPIOLIB

	select IRQ_DOMAIN if ETRAX_ARCH_V32

	select OF if ETRAX_ARCH_V32

	select OF_EARLY_FLATTREE if ETRAX_ARCH_V32



config HZ

	int
@@ -63,6 +65,10 @@ config NR_CPUS 
	int

	default "1"



config BUILTIN_DTB

	string "DTB to build into the kernel image"

	depends on OF



source "init/Kconfig"



source "kernel/Kconfig.freezer"

arch/cris/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -40,6 +40,10 @@ else 
MACH :=

endif



ifneq ($(CONFIG_BUILTIN_DTB),"")

core-$(CONFIG_OF) += arch/cris/boot/dts/

endif



LD = $(CROSS_COMPILE)ld -mcrislinux



OBJCOPYFLAGS := -O binary -R .note -R .comment -S

arch/cris/boot/dts/Makefile

0 → 100644
+6 −0
Original line number Diff line number Diff line 
BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_BUILTIN_DTB)).dtb.o

ifneq ($(CONFIG_BUILTIN_DTB),"")

obj-$(CONFIG_OF) += $(BUILTIN_DTB)

endif



clean-files := *.dtb.S

arch/cris/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ CPPFLAGS_vmlinux.lds := -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE) 
extra-y	:= vmlinux.lds



obj-y   := process.o traps.o irq.o ptrace.o setup.o time.o sys_cris.o

obj-y += devicetree.o



obj-$(CONFIG_MODULES)    += crisksyms.o

obj-$(CONFIG_MODULES)	 += module.o

arch/cris/kernel/devicetree.c

0 → 100644
+14 −0
Original line number Diff line number Diff line 
#include <linux/init.h>

#include <linux/bootmem.h>

#include <linux/printk.h>



void __init early_init_dt_add_memory_arch(u64 base, u64 size)

{

	pr_err("%s(%llx, %llx)\n",

	       __func__, base, size);

}



void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)

{

	return alloc_bootmem_align(size, align);

}