diff options
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | dts/Kconfig | 29 | ||||
| -rw-r--r-- | scripts/Makefile.spl | 4 |
3 files changed, 33 insertions, 3 deletions
@@ -1400,7 +1400,8 @@ u-boot.lds: $(LDSCRIPT) prepare FORCE spl/u-boot-spl.bin: spl/u-boot-spl @: spl/u-boot-spl: tools prepare \ - $(if $(CONFIG_OF_SEPARATE)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb) + $(if $(CONFIG_OF_SEPARATE)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb) \ + $(if $(CONFIG_OF_SEPARATE)$(CONFIG_TPL_OF_PLATDATA),dts/dt.dtb) $(Q)$(MAKE) obj=spl -f $(srctree)/scripts/Makefile.spl all spl/sunxi-spl.bin: spl/u-boot-spl diff --git a/dts/Kconfig b/dts/Kconfig index 1bc9656fae..b4b7ddc144 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -32,6 +32,14 @@ config SPL_OF_CONTROL which is not enough to support device tree. Enable this option to allow such boards to be supported by U-Boot SPL. +config TPL_OF_CONTROL + bool "Enable run-time configuration via Device Tree in TPL" + depends on TPL && OF_CONTROL + help + Some boards use device tree in U-Boot but only have 4KB of SRAM + which is not enough to support device tree. Enable this option to + allow such boards to be supported by U-Boot TPL. + config OF_LIVE bool "Enable use of a live tree" depends on OF_CONTROL @@ -136,4 +144,25 @@ config SPL_OF_PLATDATA declarations for each node. See README.platdata for more information. +config TPL_OF_PLATDATA + bool "Generate platform data for use in TPL" + depends on TPL_OF_CONTROL + help + For very constrained SPL environments the overhead of decoding + device tree nodes and converting their contents into platform data + is too large. This overhead includes libfdt code as well as the + device tree contents itself. The latter is fairly compact, but the + former can add 3KB or more to a Thumb 2 Image. + + This option enables generation of platform data from the device + tree as C code. This code creates devices using U_BOOT_DEVICE() + declarations. The benefit is that it allows driver code to access + the platform data directly in C structures, avoidin the libfdt + overhead. + + This option works by generating C structure declarations for each + compatible string, then adding platform data and U_BOOT_DEVICE + declarations for each node. See README.platdata for more + information. + endmenu diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index ac3c2c7f13..3e35cd610b 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -98,7 +98,7 @@ endif u-boot-spl-init := $(head-y) u-boot-spl-main := $(libs-y) -ifdef CONFIG_SPL_OF_PLATDATA +ifdef CONFIG_$(SPL_TPL_)OF_PLATDATA u-boot-spl-platdata := $(obj)/dts/dt-platdata.o endif @@ -202,7 +202,7 @@ cmd_cat = cat $(filter-out $(PHONY), $^) > $@ quiet_cmd_copy = COPY $@ cmd_copy = cp $< $@ -ifeq ($(CONFIG_SPL_OF_CONTROL)$(CONFIG_OF_SEPARATE)$(CONFIG_SPL_OF_PLATDATA),yy) +ifeq ($(CONFIG_$(SPL_TPL_)OF_CONTROL)$(CONFIG_OF_SEPARATE)$(CONFIG_$(SPL_TPL_)OF_PLATDATA),yy) $(obj)/$(SPL_BIN)-dtb.bin: $(obj)/$(SPL_BIN)-nodtb.bin \ $(if $(CONFIG_SPL_SEPARATE_BSS),,$(obj)/$(SPL_BIN)-pad.bin) \ $(obj)/$(SPL_BIN).dtb FORCE |