[PATCH 2/2] arm: tegra: add options for BOOTENV_EFI_SET_FDTFILE_FALLBACK for tegra186

[Peter Robinson <pbrobinson@gmail.com>]

Upstream linux DT naming doesn't align with the U-Boot DT, which may
not always be the case so this allows using BOOTENV_EFI_SET_FDTFILE_FALLBACK
where it might be appropriate for some boards.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
---

This is a bit of a hack for the Jetson TX2 because the U-Boot config
using a different naming for the DT naming to upstream Linux, I'm not
sure what naming L4T uses, and whether the 000/500 variants are widely
enough available or whether they use differnet DTs in L4T.

Welcome to suggestions of a better way to fix this one but it works
for booting the TX2 on Fedora using UEFI..

 include/config_distro_bootcmd.h   | 2 ++
 include/configs/tegra186-common.h | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h
index fc0935fa21..fd1c5f5afa 100644
--- a/include/config_distro_bootcmd.h
+++ b/include/config_distro_bootcmd.h
@@ -118,8 +118,10 @@
 	  "setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; "           \
 	"fi; "
 #else
+#ifndef BOOTENV_EFI_SET_FDTFILE_FALLBACK
 #define BOOTENV_EFI_SET_FDTFILE_FALLBACK
 #endif
+#endif
 
 
 #define BOOTENV_SHARED_EFI                                                \
diff --git a/include/configs/tegra186-common.h b/include/configs/tegra186-common.h
index 5c3ad35c76..d5f21e0907 100644
--- a/include/configs/tegra186-common.h
+++ b/include/configs/tegra186-common.h
@@ -20,6 +20,12 @@
 /* Generic Interrupt Controller */
 #define CONFIG_GICV2
 
+#undef FDTFILE
+#define BOOTENV_EFI_SET_FDTFILE_FALLBACK                                  \
+        "if test -z \"${fdtfile}\" -a -n \"${soc}\"; then "               \
+          "setenv efi_fdtfile ${vendor}/${soc}-${board}${boardver}.dtb; "           \
+        "fi; "
+
 /*
  * Memory layout for where various images get loaded by boot scripts:
  *
@@ -49,7 +55,6 @@
 	"scriptaddr=0x90000000\0" \
 	"pxefile_addr_r=0x90100000\0" \
 	"kernel_addr_r=" __stringify(CONFIG_LOADADDR) "\0" \
-	"fdtfile=" FDTFILE "\0" \
 	"fdt_addr_r=0x82000000\0" \
 	"ramdisk_addr_r=0x82100000\0"
 
-- 
2.26.0