linux-kernel - Re: [PATCH v2 4/6] dt-bindings: serial: Document Freescale LINFlex UART

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Message-ID: <20190821211841.GA16627@bogus>
Date:   Wed, 21 Aug 2019 16:18:41 -0500
From:   Rob Herring <robh@...nel.org>
To:     Stefan-gabriel Mirea <stefan-gabriel.mirea@....com>
Cc:     "corbet@....net" <corbet@....net>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Leo Li <leoyang.li@....com>,
        "jslaby@...e.com" <jslaby@...e.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Cosmin Stefan Stoica <cosmin.stoica@....com>,
        Larisa Ileana Grigore <larisa.grigore@....com>
Subject: Re: [PATCH v2 4/6] dt-bindings: serial: Document Freescale LINFlex
 UART

On Fri, Aug 09, 2019 at 11:29:14AM +0000, Stefan-gabriel Mirea wrote:
> From: Stoica Cosmin-Stefan <cosmin.stoica@....com>
> 
> Add documentation for the serial communication interface module (LINFlex),
> found in two instances on S32V234.
> 
> Signed-off-by: Stoica Cosmin-Stefan <cosmin.stoica@....com>
> Signed-off-by: Larisa Grigore <Larisa.Grigore@....com>
> Signed-off-by: Stefan-Gabriel Mirea <stefan-gabriel.mirea@....com>
> ---
>  .../bindings/serial/fsl,s32-linflexuart.txt   | 24 +++++++++++++++++++
>  1 file changed, 24 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt
> 
> diff --git a/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt
> new file mode 100644
> index 000000000000..957ffeaca9f1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt
> @@ -0,0 +1,24 @@
> +* Freescale Linflex UART

Be consistent with the name: LINFlexD?

> +
> +The LINFlexD controller implements several LIN protocol versions, as well as
> +support for full-duplex UART communication through 8-bit and 9-bit frames. The
> +Linflex UART driver enables operation only in UART mode.

What the driver supports or not is independent of the binding.

> +
> +See chapter 47 ("LINFlexD") in the reference manual[1].
> +
> +Required properties:
> +- compatible :
> +  - "fsl,s32-linflexuart" for linflex configured in uart mode which

LINFlexD?

> +  is compatible with the one integrated on S32V234 SoC

Compatibles should be SoC specific. Is 's32' specific enough to account 
for any differences or future bugs found?

> +- reg : Address and length of the register set for the device
> +- interrupts : Should contain uart interrupt
> +
> +Example:
> +uart0:serial@...53000 {

space    ^

> +	compatible = "fsl,s32-linflexuart";
> +	reg = <0x0 0x40053000 0x0 0x1000>;
> +	interrupts = <0 59 4>;
> +	status = "disabled";

Don't show status in examples.

> +};
> +
> +[1] https://www.nxp.com/webapp/Download?colCode=S32V234RM
> -- 
> 2.22.0
>