Add support for compatible TNSPECs #25
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* Compatibility logic derived from the nv-l4t-bootloader-config script in stock L4T * BUP entries are compared to the exact TNSPEC first, then the compatibility spec in bup_enumerate_entries() * Adds some cleanup in TNSPEC parsing handle machine names containing hyphens, and the actual maximum number of fields Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Matt Madison <matt@madison.systems>
ichergui
approved these changes
Jan 9, 2023
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Note that to actually use these changes, you need BUP payloads that have been created under the same compatibility rules. I'll be submitting the needed |
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This implements the equivalent of the
COMPATIBLE_SPECconfiguration in the stock L4T update tools, but the computation of the compatibility spec is directly coded, rather than implemented in a separate script and stored in a configuration file.With this change, we can reduce the size of BUP payloads by including fewer variants, and support bootloader updates for new revisions of Jetson modules when those revisions have no impact on boot firmware compatibility.
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