[PATCH 0/4] Add DT bindings and device tree for Compulab SB-UCM-iMX8MPLUS

[Laurent Pinchart]

Hi Rob,

On Tue, Mar 05, 2024 at 07:20:21AM -0600, Rob Herring wrote:
> On Tue, 05 Mar 2024 02:42:17 +0200, Laurent Pinchart wrote:
> > Hello,
> > 
> > This small patch series is a drive-by addition of the Compulab
> > SB-UCM-iMX8MPLUS to the Linux kernel device tree sources. While porting
> > the device tree from the Compulab BSP kernel to mainline, I thought I
> > could as well mainline it, along with related conversion of text DT
> > bindings to YAML.
> > 
> > The SB-UCM-iMX8MPLUS is a carrier board designed as a reference to
> > evaluate the Compulab UCM-iMX8MPLUS SoM. The SoM integrates the bare
> > minimal peripherals (DRAM, eMMC, ethernet PHY, EEPROM and RTC), while
> > the carrier board includes a much wider range of peripherals. I have
> > only enabled support for the ones I am interested in, or, as a strech
> > goal, the ones I could easily test.
> > 
> > The first patch in the series adds compatible strings for the SoM and
> > the board to the ARM FSL bindings. The next patch then converts text DT
> > bindings to a YAML schema for the RTC present on the SoM. Finally, the
> > last two patches add DT sources for the SoM and the carrier board.
> > 
> > Please see individual patches for details.
> > 
> > I have checked the validity of the bindings and the device tree sources.
> > The only warnings in the DT sources are due to issues in imx8mp.dtsi.
> > 
> > Laurent Pinchart (4):
> >   dt-bindings: arm: fsl: Add Compulab SB-UCM-iMX8MPLUS carrier board
> >   dt-bindings: rtc: abx80x: Convert text bindings to YAML
> >   arm64: dts: freescale: Add device tree for Compulab UCM-iMX8M-Plus
> >   arm64: dts: freescale: Add device tree for Compulab SB-UCM-iMX8MPLUS
> > 
> >  .../devicetree/bindings/arm/fsl.yaml          |   6 +
> >  .../bindings/rtc/abracon,abx80x.txt           |  31 --
> >  .../bindings/rtc/abracon,abx80x.yaml          |  89 +++++
> >  arch/arm64/boot/dts/freescale/Makefile        |   1 +
> >  .../boot/dts/freescale/imx8mp-sb-ucm.dts      | 284 ++++++++++++++++
> >  arch/arm64/boot/dts/freescale/imx8mp-ucm.dtsi | 309 ++++++++++++++++++
> >  6 files changed, 689 insertions(+), 31 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/rtc/abracon,abx80x.txt
> >  create mode 100644 Documentation/devicetree/bindings/rtc/abracon,abx80x.yaml
> >  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dts
> >  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-ucm.dtsi
> 
> My bot found new DTB warnings on the .dts files added or changed in this
> series.
> 
> Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
> are fixed by another series. Ultimately, it is up to the platform
> maintainer whether these warnings are acceptable or not. No need to reply
> unless the platform maintainer has comments.
> 
> If you already ran DT checks and didn't see these error(s), then
> make sure dt-schema is up to date:
> 
>   pip3 install dtschema --upgrade
> 
> 
> New warnings running 'make CHECK_DTBS=y freescale/imx8mp-sb-ucm.dtb' for 20240305004222.622-1-laurent.pinchart at ideasonboard.com:
> 
> Error: arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dts:68.1-10 Label or path hdmi_pvi not found
> Error: arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dts:72.1-9 Label or path hdmi_tx not found
> Error: arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dts:86.1-13 Label or path hdmi_tx_phy not found
> Error: arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dts:208.1-8 Label or path lcdif3 not found

I forgot to mention in the cover letter that this depends on i.MX8MP
HDMI integration in DT that is currently pending. As it's not in
linux-next yet, I'll send a v2 that splits HDMI support in a separate
patch. Depending on when the HDMI integration gets merged, the base
SB-UCM support can go in by itself or with HDMI support in v6.10.

> FATAL ERROR: Syntax error parsing input tree
> make[3]: *** [scripts/Makefile.lib:419: arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dtb] Error 1
> make[2]: *** [scripts/Makefile.build:481: arch/arm64/boot/dts/freescale] Error 2
> make[2]: Target 'arch/arm64/boot/dts/freescale/imx8mp-sb-ucm.dtb' not remade because of errors.
> make[1]: *** [/home/rob/proj/linux-dt-testing/Makefile:1385: freescale/imx8mp-sb-ucm.dtb] Error 2
> make: *** [Makefile:240: __sub-make] Error 2
> make: Target 'freescale/imx8mp-sb-ucm.dtb' not remade because of errors.

-- 
Regards,

Laurent Pinchart