On Wed, 25 Oct 2023 13:29:37 +0800, Edward Chow wrote: > There are special "offset" and "size" values defined and documented in > linux/mtd/partitions.h: > > // consume as much as possible, leaving size after the end of partition. > > // the partition will start at the next erase block. > > // the partition will start where the previous one ended. > > (Though not explicitly, they are compared against variables in uint64_t > in drivers/mtd/mtdpart.c, so they had better be considered as such.) > > // the partition will extend to the end of the master MTD device. > > These special values could be used to define partitions automatically > fitting to the size of the master MTD device at runtime. > > However, these values used not to be exported to dt-bindings, thus > seldom used before, since they might have been only used in numeric form, > such as "(-1) (-3)" for MTDPART_OFS_RETAIN. > > Now, they are exported in dt-bindings/mtd/partitions.h as 32-bit cell > values, so 2-cell addressed should be defined to use special offset values, > such as "MTDPART_OFS_SPECIAL MTDPART_OFS_RETAIN" for MTDPART_OFS_RETAIN in > linux/mtd/partitions.h. An example is added to fixed-partitions.yaml. > > Signed-off-by: Edward Chow <equu@xxxxxxxxxxx> > --- > .../mtd/partitions/fixed-partitions.yaml | 29 +++++++++++++++++++ > MAINTAINERS | 2 ++ > include/dt-bindings/mtd/partitions.h | 15 ++++++++++ > 3 files changed, 46 insertions(+) > create mode 100644 include/dt-bindings/mtd/partitions.h > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check' on your patch (DT_CHECKER_FLAGS is new in v5.13): yamllint warnings/errors: dtschema/dtc warnings/errors: Error: Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.example.dts:225.24-25 syntax error FATAL ERROR: Unable to parse input tree make[2]: *** [scripts/Makefile.lib:419: Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.example.dtb] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [/builds/robherring/dt-review-ci/linux/Makefile:1427: dt_binding_check] Error 2 make: *** [Makefile:234: __sub-make] Error 2 doc reference errors (make refcheckdocs): See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20231025052937.830813-1-equu@xxxxxxxxxxx The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.
