uboot: zynqmp: generate SPL image with PMUFW binary

In order to boot on the Xilinx ZynqMP SoCs, U-Boot SPL requires a
recent PMU firmware loaded. Instruct U-Boot to add pmufw.bin to the
boot.bin file together with U-Boot SPL, and the boot ROM will load
both.

For this to work properly, a patch to U-Boot is needed. However this
patch must be applied by each defconfig that wishes to use
BR2_TARGET_UBOOT_ZYNQMP_PMUFW. If it were in boot/uboot/ to be applied
unconditionally, it would break the build for configs using a U-Boot
version higher than 2018.7-rc1 where the patch is already applied.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Joel Carlson <joelsoncarl@gmail.com>
Reviewed-by: Joel Carlson <JoelsonCarl@gmail.com>
Tested-by: Joel Carlson <JoelsonCarl@gmail.com>
[Thomas:
 - indicate that this feature requires U-Boot 2018.07, since commit
   c7df098a71e05dc81cee818747759e8060b59626 is needed.
 - define UBOOT_ZYNQMP_KCONFIG_PMUFW only once, and instead use a
   variable named UBOOT_ZYNQMP_PMUFW_PATH to store the path to the PMU
   firmware]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/boot/uboot/Config.in b/boot/uboot/Config.in
index f0166e382b..124991d20b 100644
--- a/boot/uboot/Config.in
+++ b/boot/uboot/Config.in
@@ -368,6 +368,37 @@ config BR2_TARGET_UBOOT_ZYNQ_IMAGE
 	  for u-boot-dtb.img file so this U-Boot format is required
 	  to be set.
 
+config BR2_TARGET_UBOOT_ZYNQMP
+	bool "Boot on the Xilinx ZynqMP SoCs"
+	depends on BR2_aarch64
+	help
+	  Enable options specific to the Xilinx ZynqMP family of SoCs.
+
+if BR2_TARGET_UBOOT_ZYNQMP
+
+config BR2_TARGET_UBOOT_ZYNQMP_PMUFW
+	string "PMU firmware location"
+	depends on BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG
+	help
+	  Location of a PMU firmware binary.
+
+	  If not empty, instructs the U-Boot build process to generate
+	  a boot.bin (to be loaded by the ZynqMP boot ROM) containing
+	  both the U-Boot SPL and the PMU firmware in the
+	  Xilinx-specific boot format.
+
+	  The value can be an absolute or relative path, and will be
+	  used directly from where it is located, or an URI
+	  (e.g. http://...), and it will be downloaded and used from
+	  the download directory.
+
+	  If empty, the generated boot.bin will not contain a PMU
+	  firmware.
+
+	  This feature requires U-Boot >= 2018.07.
+
+endif
+
 config BR2_TARGET_UBOOT_ALTERA_SOCFPGA_IMAGE_CRC
 	bool "CRC image for Altera SoC FPGA (mkpimage)"
 	depends on BR2_arm