linux-kernel - Re: [PATCH 06/15] MIPS: dts: img: pistachio

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Date:   Mon, 23 Jul 2018 17:06:47 -0700
From:   Paul Burton <paul.burton@...s.com>
To:     Andreas Färber <afaerber@...e.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>, linux-kernel@...r.kernel.org,
        Rahul Bedarkar <rahulbedarkar89@...il.com>,
        James Hartley <james.hartley@...drel.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Harry Morris <h.morris@...coda.com>,
        Stefan Schmidt <stefan@....samsung.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        David Gibson <david@...son.dropbear.id.au>
Subject: Re: [PATCH 06/15] MIPS: dts: img: pistachio_marduk: Add 6Lowpan node

Hi Andreas,

On Sun, Jul 22, 2018 at 11:20:01PM +0200, Andreas Färber wrote:
> diff --git a/arch/mips/boot/dts/img/pistachio_marduk.dts b/arch/mips/boot/dts/img/pistachio_marduk.dts
> index d723b68084c9..b0b6b534a41f 100644
> --- a/arch/mips/boot/dts/img/pistachio_marduk.dts
> +++ b/arch/mips/boot/dts/img/pistachio_marduk.dts
> @@ -158,6 +158,20 @@
>  		   <&gpio1 12 GPIO_ACTIVE_HIGH>,
>  		   <&gpio1 13 GPIO_ACTIVE_HIGH>,
>  		   <&gpio1 14 GPIO_ACTIVE_HIGH>;
> +
> +	ca8210: sixlowpan@4 {
> +		compatible = "cascoda,ca8210";
> +		reg = <4>;
> +		spi-max-frequency = <3000000>;
> +		spi-cpol;
> +		reset-gpio = <&gpio0 12 GPIO_ACTIVE_HIGH>;
> +		irq-gpio = <&gpio2 12 GPIO_ACTIVE_HIGH>;
> +
> +		extclock-enable;
> +		extclock-freq = <16000000>;
> +		extclock-gpio = <2>; /* spiuart_clk */
> +		#clock-cells = <0>;
> +	};

dtc complains about the extclock-gpio property because it expects a
property named *-gpio to contain a gpio-list:

    DTC     arch/mips/boot/dts/img/pistachio_marduk.dtb
  arch/mips/boot/dts/img/pistachio_marduk.dtb: Warning (gpios_property):
    /spi@...00f00/sixlowpan@4: Missing property '#gpio-cells' in node
    /clk@...44000 or bad phandle (referred from extclock-gpio[0])

Rob, perhaps this should be added as a second false-positive case in
dtc's prop_is_gpio()?

Thanks,
    Paul