linux-kernel - Re: [PATCH v2] dt-bindings: serial: 8250

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Date:   Thu, 19 Oct 2023 17:37:26 +0200
From:   Francesco Dolcini <francesco@...cini.it>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Francesco Dolcini <francesco@...cini.it>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dt-bindings: serial: 8250_omap: add
 rs485-rts-active-high

On Thu, Oct 19, 2023 at 05:13:01PM +0200, Geert Uytterhoeven wrote:
> Hi Franceso,
> 
> On Thu, Oct 19, 2023 at 5:05 PM Francesco Dolcini <francesco@...cini.it> wrote:
> > On Thu, Oct 19, 2023 at 12:09:06PM +0200, Geert Uytterhoeven wrote:
> > > On Wed, May 31, 2023 at 1:14 PM Francesco Dolcini <francesco@...cini.it> wrote:
> > > > From: Francesco Dolcini <francesco.dolcini@...adex.com>
> > > >
> > > > Add rs485-rts-active-high property, this was removed by mistake.
> > > > In general we just use rs485-rts-active-low property, however the OMAP
> > > > UART for legacy reason uses the -high one.
> > > >
> > > > Fixes: 767d3467eb60 ("dt-bindings: serial: 8250_omap: drop rs485 properties")
> > > > Closes: https://lore.kernel.org/all/ZGefR4mTHHo1iQ7H@francesco-nb.int.toradex.com/
> > > > Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> > > > ---
> > > > v2: removed reported-by
> > >
> > > Thanks for your patch, which is now commit 403e97d6ab2cb6fd
> > > ("dt-bindings: serial: 8250_omap: add rs485-rts-active-high")
> > > in v6.4-rc5.
> > >
> > > > --- a/Documentation/devicetree/bindings/serial/8250_omap.yaml
> > > > +++ b/Documentation/devicetree/bindings/serial/8250_omap.yaml
> > > > @@ -70,6 +70,7 @@ properties:
> > > >    dsr-gpios: true
> > > >    rng-gpios: true
> > > >    dcd-gpios: true
> > > > +  rs485-rts-active-high: true
> > >
> > > make dt_binding_check complains:
> > >
> > >     Documentation/devicetree/bindings/serial/8250_omap.yaml:
> > > rs485-rts-active-high: missing type definition
> >
> > For some reasons it works for me (and worked when I did send the patch)
> >
> > $ make dt_binding_check DT_SCHEMA_FILES=8250_omap.yaml
> > ...
> >   HOSTCC  scripts/dtc/libfdt/fdt_overlay.o
> >   HOSTCC  scripts/dtc/fdtoverlay.o
> >   HOSTLD  scripts/dtc/fdtoverlay
> >   LINT    Documentation/devicetree/bindings
> > invalid config: unknown option "required" for rule "quoted-strings"
> > xargs: /usr/bin/yamllint: exited with status 255; aborting
> >   CHKDT   Documentation/devicetree/bindings/processed-schema.json
> >   SCHEMA  Documentation/devicetree/bindings/processed-schema.json
> > /home/francesco/Toradex/sources/linux/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: ignoring, error in schema: properties: qcom,ls-fs-output-impedance-bp
> > /home/francesco/Toradex/sources/linux/Documentation/devicetree/bindings/arm/vexpress-sysreg.yaml: ignoring, error in schema: properties: gpio-controller
> > /home/francesco/Toradex/sources/linux/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml: ignoring, error in schema: patternProperties: ^thermistor@: properties: adi,excitation-current-nanoamp
> > /home/francesco/Toradex/sources/linux/Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml: ignoring, error in schema: patternProperties: ^channel@([0-9a-f])$: properties: adi,burnout-current-nanoamp
> > /home/francesco/Toradex/sources/linux/Documentation/devicetree/bindings/iio/addac/adi,ad74115.yaml: ignoring, error in schema: properties: adi,ext2-burnout-current-nanoamp
> >   DTEX    Documentation/devicetree/bindings/serial/8250_omap.example.dts
> >   DTC_CHK Documentation/devicetree/bindings/serial/8250_omap.example.dtb
> >
> >
> > any idea on what could be different between us?
> 
> Are you using the latest dt-schema?

Nope, and I tried to update it and now everything fails in a miserable
way.

In any case the fix is clear and I am pretty confident the issue I had is
what you just wrote, I'll send a patch.

Francesco