NetCube-Systems-Austria/kumquat-buildroot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

uboot: zynqmp: Support loading a PMU config

Browse Source 
Before now, U-Boot SPL could only load the Platform Management Unit
(PMU) by patching the board-specific pm_cfg_obj.c file into the generic
PMU firmware, but that then requires generating a new PMU firmware for
every board configuration. To fix that, Luca Ceresoli added support to
U-Boot to load the pm_cfg_obj[1].

Like the PMU firmware, we need a way to pass the PMU cfg to U-Boot
during build. U-Boot only accepts the binary format of the cfg, so we
must convert the source file with the tool provided with U-Boot.

[1] https://lucaceresoli.net/zynqmp-uboot-spl-pmufw-cfg-load/

Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Brandon Maier 2020-06-26 10:59:56 -05:00 committed by Yann E. MORIN
parent 408bc354a9
commit 16a522b5e0
2 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
boot/uboot/Config.in
View File

@ -458,6 +458,28 @@ config BR2_TARGET_UBOOT_ZYNQMP_PMUFW
This feature requires U-Boot >= 2018.07.
config BR2_TARGET_UBOOT_ZYNQMP_PM_CFG
string "PMU configuration location"
depends on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG
help
Location of a PMU configuration file.
If not empty, Buildroot will convert the PMU configuration
file into a loadable blob and pass it to U-Boot. The blob gets
embedded into the U-Boot SPL and is used to configure the PMU
during board initialization.
Unlike the PMU firmware, the PMU configuration file is unique
to each board configuration. A PMU configuration file can be
generated by building your Xilinx SDK BSP. It can be found in
the BSP source, for example at
./psu_cortexa53_0/libsrc/xilpm_v2_4/src/pm_cfg_obj.c
Leave this option empty if your PMU firmware has a hard-coded
configuration object or you are loading it by any other means.
This feature requires U-Boot >= v2019.10.
config BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE
string "Custom psu_init_gpl file"
depends on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG

17
boot/uboot/uboot.mk
View File

@ -360,6 +360,22 @@ define UBOOT_ZYNQMP_KCONFIG_PMUFW
$(call KCONFIG_SET_OPT,CONFIG_PMUFW_INIT_FILE,"$(UBOOT_ZYNQMP_PMUFW_PATH)")
endef
UBOOT_ZYNQMP_PM_CFG = $(call qstrip,$(BR2_TARGET_UBOOT_ZYNQMP_PM_CFG))
ifneq ($(UBOOT_ZYNQMP_PM_CFG),)
UBOOT_ZYNQMP_PM_CFG_BIN = $(UBOOT_DIR)/pm_cfg_obj.bin
define UBOOT_ZYNQMP_KCONFIG_PM_CFG
$(call KCONFIG_SET_OPT,CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE,"$(UBOOT_ZYNQMP_PM_CFG_BIN)", \
$(@D)/.config)
endef
define UBOOT_ZYNQMP_PM_CFG_CONVERT
$(UBOOT_DIR)/tools/zynqmp_pm_cfg_obj_convert.py \
"$(UBOOT_ZYNQMP_PM_CFG)" \
"$(UBOOT_ZYNQMP_PM_CFG_BIN)"
endef
UBOOT_PRE_BUILD_HOOKS += UBOOT_ZYNQMP_PM_CFG_CONVERT
endif
UBOOT_ZYNQMP_PSU_INIT = $(call qstrip,$(BR2_TARGET_UBOOT_ZYNQMP_PSU_INIT_FILE))
UBOOT_ZYNQMP_PSU_INIT_PATH = $(shell readlink -f $(UBOOT_ZYNQMP_PSU_INIT))
@ -422,6 +438,7 @@ endif
define UBOOT_KCONFIG_FIXUP_CMDS
$(UBOOT_ZYNQMP_KCONFIG_PMUFW)
$(UBOOT_ZYNQMP_KCONFIG_PM_CFG)
$(UBOOT_ZYNQMP_KCONFIG_PSU_INIT)
endef