[OpenWrt-Devel] [PATCH 2/4] brcm2708: add DT support
Álvaro Fernández Rojas
noltari at gmail.com
Sun Jul 12 17:37:23 EDT 2015
Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
---
target/linux/brcm2708/bcm2708/config-default | 2 +-
target/linux/brcm2708/bcm2709/config-default | 2 +-
target/linux/brcm2708/config-3.18 | 11 +++-
target/linux/brcm2708/image/Makefile | 77 ++++++++++++++++++++--------
target/linux/brcm2708/image/config.txt | 12 ++---
5 files changed, 75 insertions(+), 29 deletions(-)
diff --git a/target/linux/brcm2708/bcm2708/config-default b/target/linux/brcm2708/bcm2708/config-default
index 858d236..2fdc4e9 100644
--- a/target/linux/brcm2708/bcm2708/config-default
+++ b/target/linux/brcm2708/bcm2708/config-default
@@ -1,4 +1,4 @@
CONFIG_ARCH_BCM2708=y
-# CONFIG_BCM2708_DT is not set
+CONFIG_BCM2708_DT=y
CONFIG_MACH_BCM2708=y
CONFIG_VMSPLIT_3G=y
diff --git a/target/linux/brcm2708/bcm2709/config-default b/target/linux/brcm2708/bcm2709/config-default
index 8945c24..9fddfe4 100644
--- a/target/linux/brcm2708/bcm2709/config-default
+++ b/target/linux/brcm2708/bcm2709/config-default
@@ -3,7 +3,7 @@ CONFIG_ARCH_BCM2709=y
# CONFIG_ARM_THUMBEE is not set
CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y
CONFIG_BCM2708_NOL2CACHE=y
-# CONFIG_BCM2709_DT is not set
+CONFIG_BCM2709_DT=y
# CONFIG_CRYPTO_SHA1_ARM_NEON is not set
# CONFIG_CRYPTO_SHA512_ARM_NEON is not set
CONFIG_HAVE_ARM_ARCH_TIMER=y
diff --git a/target/linux/brcm2708/config-3.18 b/target/linux/brcm2708/config-3.18
index e788bb8..33007dd 100644
--- a/target/linux/brcm2708/config-3.18
+++ b/target/linux/brcm2708/config-3.18
@@ -203,6 +203,8 @@ CONFIG_NLS_ASCII=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NO_HZ=y
CONFIG_OABI_COMPAT=y
+CONFIG_OF=y
+CONFIG_OF_GPIO=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_PAGE_OFFSET=0xC0000000
# CONFIG_PCI_SYSCALL is not set
@@ -223,10 +225,16 @@ CONFIG_SCSI=y
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_PROC_FS is not set
# CONFIG_SENSORS_BCM2835 is not set
-# CONFIG_SERIAL_8250 is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+# CONFIG_SERIAL_8250_DMA is not set
+CONFIG_SERIAL_8250_NR_UARTS=1
+CONFIG_SERIAL_8250_RUNTIME_UARTS=0
# CONFIG_SERIAL_AMBA_PL010 is not set
CONFIG_SERIAL_AMBA_PL011=y
CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_SND_BCM2708_SOC_I2S is not set
# CONFIG_SQUASHFS is not set
# CONFIG_STAGING is not set
@@ -255,6 +263,7 @@ CONFIG_USB_STORAGE=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_UAS=y
CONFIG_USB_USBNET=y
+CONFIG_USE_OF=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_VFP=y
# CONFIG_VIDEO_BCM2835 is not set
diff --git a/target/linux/brcm2708/image/Makefile b/target/linux/brcm2708/image/Makefile
index e70bdd0..10ecfda 100644
--- a/target/linux/brcm2708/image/Makefile
+++ b/target/linux/brcm2708/image/Makefile
@@ -11,30 +11,67 @@ include $(INCLUDE_DIR)/host.mk
FAT32_BLOCK_SIZE=1024
FAT32_BLOCKS=$(shell echo $$(($(CONFIG_BRCM2708_SD_BOOT_PARTSIZE)*1024*1024/$(FAT32_BLOCK_SIZE))))
-define Image/Build/RaspberryPi
- rm -f $(KDIR)/boot.img
-
- mkfs.fat -C $(KDIR)/boot.img $(FAT32_BLOCKS)
- # Raspberry Pi has no bootloader, instead the GPU loads and starts the kernel
- mcopy -i $(KDIR)/boot.img $(KDIR)/bootcode.bin ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/COPYING.linux ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/LICENCE.broadcom ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/start.elf ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/start_cd.elf ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/fixup.dat ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/fixup_cd.dat ::
- mcopy -i $(KDIR)/boot.img cmdline.txt ::
- mcopy -i $(KDIR)/boot.img config.txt ::
- mcopy -i $(KDIR)/boot.img $(KDIR)/Image ::kernel.img # Copy OpenWrt built kernel
- ./gen_rpi_sdcard_img.sh $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img $(KDIR)/boot.img $(KDIR)/root.$(1) \
+### Image scripts ###
+define Build/build-dtb
+ $(LINUX_DIR)/scripts/dtc/dtc -O dtb -o $@.dtb $(DTS_DIR)/$(DEVICE_DTS).dts
+endef
+
+define Build/gen-cfg
+ cat config.txt > $@.config
+ echo -e "\ndevice_tree=$(DEVICE_DTS).dtb" >> $@.config
+endef
+
+define Build/boot-img
+ rm -f $@.boot
+ mkfs.fat -C $@.boot $(FAT32_BLOCKS)
+ mcopy -i $@.boot $(KDIR)/bootcode.bin ::
+ mcopy -i $@.boot $(KDIR)/COPYING.linux ::
+ mcopy -i $@.boot $(KDIR)/LICENCE.broadcom ::
+ mcopy -i $@.boot $(KDIR)/start.elf ::
+ mcopy -i $@.boot $(KDIR)/start_cd.elf ::
+ mcopy -i $@.boot $(KDIR)/fixup.dat ::
+ mcopy -i $@.boot $(KDIR)/fixup_cd.dat ::
+ mcopy -i $@.boot cmdline.txt ::
+ mcopy -i $@.boot $@.config ::config.txt
+ mcopy -i $@.boot $(word 1,$^) ::kernel.img
+ mcopy -i $@.boot $@.dtb ::$(DEVICE_DTS).dtb
+endef
+
+define Build/sdcard-img
+ ./gen_rpi_sdcard_img.sh $@ $@.boot $(word 2,$^) \
$(CONFIG_BRCM2708_SD_BOOT_PARTSIZE) $(CONFIG_TARGET_ROOTFS_PARTSIZE)
endef
-define Image/Build
- $(CP) $(KDIR)/root.$(1) $(BIN_DIR)/$(IMG_PREFIX)-$(1).img
- $(CP) $(KDIR)/Image $(BIN_DIR)/$(IMG_PREFIX)-Image
+### Device macros ###
+define Device/Default
+ FILESYSTEMS := ext4
+ PROFILES = Default $$(DEVICE_PROFILE)
+ KERNEL := kernel-bin
+ IMAGES := sdcard.bin
+ IMAGE/sdcard.bin := build-dtb | gen-cfg | boot-img | sdcard-img
+ DEVICE_PROFILE :=
+ DEVICE_NAME :=
+ DEVICE_DTS :=
+endef
+DEVICE_VARS += DEVICE_PROFILE DEVICE_NAME DEVICE_DTS
- $(call Image/Build/RaspberryPi,$(1))
+# $(1) = profile
+# $(2) = image name
+# $(3) = dts
+define add_bcm2708
+ define Device/$(2)
+ DEVICE_PROFILE := $(1)
+ DEVICE_NAME := $(2)
+ DEVICE_DTS := $(3)
+ endef
+ TARGET_DEVICES += $(2)
endef
+# Raspberry Pi Model B
+$(eval $(call add_bcm2708,RaspberryPi,rpi-b,bcm2708-rpi-b))
+# Raspberry Pi Model B+
+$(eval $(call add_bcm2708,RaspberryPi,rpi-b-plus,bcm2708-rpi-b-plus))
+# Raspberry Pi 2 Model B
+$(eval $(call add_bcm2708,RaspberryPi2,rpi-2-b,bcm2709-rpi-2-b))
+
$(eval $(call BuildImage))
diff --git a/target/linux/brcm2708/image/config.txt b/target/linux/brcm2708/image/config.txt
index f7c46c6..9e6e8e9 100644
--- a/target/linux/brcm2708/image/config.txt
+++ b/target/linux/brcm2708/image/config.txt
@@ -476,7 +476,7 @@
## Stop start.elf from filling in ATAGS (memory from 0x100) before
## launching kernel
##
-#disable_commandline_tags=0
+disable_commandline_tags=1
## cmdline (string)
## Command line parameters. Can be used instead of cmdline.txt file
@@ -491,7 +491,7 @@
## kernel_address
## Address to load kernel.img file at
##
-#kernel_address=0x00000000
+kernel_address=0x8000
## ramfsfile (string)
## ramfs file to load
@@ -515,21 +515,21 @@
## device_tree_address
## Address to load device_tree at
##
-#device_tree_address=0x00000000
+device_tree_address=0x100
## init_uart_baud
## Initial uart baud rate.
##
## Default 115200
##
-#init_uart_baud=115200
+init_uart_baud=115200
## init_uart_clock
## Initial uart clock.
##
## Default 3000000 (3MHz)
##
-#init_uart_clock=3000000
+init_uart_clock=3000000
## init_emmc_clock
## Initial emmc clock, increasing this can speedup your SD-card.
@@ -920,4 +920,4 @@
## 7 1.375 V
## 8 1.4 V
##
-#over_voltage_sdram_p=0
\ No newline at end of file
+#over_voltage_sdram_p=0
--
1.9.1
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