Re: [PATCH 2/4] Revert "dt-bindings: display: bridge: ldb: Fill in reg property"

Rob Herring (Arm)
2026-05-04T21:42:27Z

On Mon, 04 May 2026 22:21:42 +0200, Marco Felsch wrote:
> This reverts commit 16c8d76abe83d75b578d72ee22d25a52c764e14a.
>
> Remove the 'reg' and 'reg-names' property from the LDB.
>
> The LDB is either part of the IOMUX_GPR (i.MX6SX) or the BLKCTRL
> (i.MX8MP, i.MX93) register space. Both IOMUX_GPR and BLKCTRL are
> register ranges with loose register definitions. E.g.
>
> - On the i.MX8MP there is one register which controls the AXI
> threshold for two different IPs (BIT(31:16) - IP1, BIT(15:0) - IP2).
> - On the i.MX6SX IOMUXC_GPR5 controlls: CSI2 mux, WDOG3 settings, PXP
> handshake, ...
>
> In conclusion: it can't be ensured that one register belongs to one
> dedicated IP and the LDB is rather an exception than the rule.
>
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> ---
> .../devicetree/bindings/display/bridge/fsl,ldb.yaml | 15 +--------------
> 1 file changed, 1 insertion(+), 14 deletions(-)
>

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-media-blk-ctrl.example.dtb: blk-ctrl@32ec0000 (fsl,imx8mp-media-blk-ctrl): bridge@5c: 'reg', 'reg-names' do not match any of the regexes: '^pinctrl-[0-9]+$'
from schema $id: http://devicetree.org/schemas/soc/imx/fsl,imx8mp-media-blk-ctrl.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-media-blk-ctrl.example.dtb: blk-ctrl@32ec0000 (fsl,imx8mp-media-blk-ctrl): bridge@5c: Unevaluated properties are not allowed ('reg', 'reg-names' were unexpected)
from schema $id: http://devicetree.org/schemas/soc/imx/fsl,imx8mp-media-blk-ctrl.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-media-blk-ctrl.example.dtb: bridge@5c (fsl,imx8mp-ldb): 'reg', 'reg-names' do not match any of the regexes: '^pinctrl-[0-9]+$'
from schema $id: http://devicetree.org/schemas/display/bridge/fsl,ldb.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260504-v7-1-topic-ldb-fixes-v1-2-0125d937ff7f@pengutronix.de

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.