diff options
| author | Damien Le Moal <damien.lemoal@wdc.com> | 2019-01-18 15:49:37 +0900 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-01-21 09:58:33 +0530 |
| commit | 0df82694776d4497ca3bcfb662a68fd817698e89 (patch) | |
| tree | a0524cf1d8c2df483adb241c53bb3885c2503230 /docs/firmware | |
| parent | f4373731e386a3b410f3e8acf6620111fb339abc (diff) | |
Makefile: Add support for device tree compilation
Add rules to compile dts files into dtb files using the device tree
compiler (dtc). A platform can specify the DTS file to compile using
the platform-dtb-y variable. The flattened device tree binary file to be
used for building the final polatform firmware can be specified using
the new FW_PAYLOAD_FDT firmware configuration option to point to the
automatically compiled FDT file. Using the existing FW_PAYLOAD_FDT_PATH
configuration option is still possible and will take precedence over
the FW_PAYLOAD_FDT definition.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Diffstat (limited to 'docs/firmware')
| -rw-r--r-- | docs/firmware/fw_payload.md | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/firmware/fw_payload.md b/docs/firmware/fw_payload.md index 0e705a2..3a8a14d 100644 --- a/docs/firmware/fw_payload.md +++ b/docs/firmware/fw_payload.md @@ -57,6 +57,14 @@ device tree file is specified by the platform (c.f. *FW_PAYLOAD_FDT*), then the firmware will expect the FDT to be passed as an argument by the prior booting stage. +* **FW_PAYLOAD_FDT** - Path to an internal flattened device tree +binary file defined by the platform code. The file name must match the +DTB file name specified in the platform *objects.mk* file with the +*platform-dtb-y* entry. This option results in *FW_PAYLOAD_FDT_PATH* to +be automatically set. Specifying *FW_PAYLOAD_FDT_PATH* on the `make` +command line disables *FW_PAYLOAD_FDT* and the command line specified +device tree binary file is used for building the final firmware. + * **FW_PAYLOAD_FDT_ADDR** - Address where the FDT passed by the prior booting stage or specified by the *FW_PAYLOAD_FDT_PATH* parameter and embedded in the *.text* section will be placed before executing the |