linux-kernel - Re: [PATCH v2 3/3] ARM: dts: bcm5301x: Add I2C support to the DT

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Date:   Sun, 5 Mar 2017 17:13:34 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jon Mason <jon.mason@...adcom.com>,
        Hauke Mehrtens <hauke@...ke-m.de>, zajec5@...il.com
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Florian Fainelli <f.fainelli@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Jon Mason <jonmason@...adcom.com>
Subject: Re: [PATCH v2 3/3] ARM: dts: bcm5301x: Add I2C support to the DT



On 03/02/2017 04:21 PM, Jon Mason wrote:
> From: Jon Mason <jonmason@...adcom.com>
> 
> Add I2C support to the bcm5301x Device Tree.  Since no driver changes
> are needed to enable this hardware, only the device tree changes are
> required to make this functional.
> 
> Signed-off-by: Jon Mason <jonmason@...adcom.com>
> ---
>  arch/arm/boot/dts/bcm5301x.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/bcm5301x.dtsi b/arch/arm/boot/dts/bcm5301x.dtsi
> index 4e3fbce..2a343f2 100644
> --- a/arch/arm/boot/dts/bcm5301x.dtsi
> +++ b/arch/arm/boot/dts/bcm5301x.dtsi
> @@ -338,6 +338,15 @@
>  		};
>  	};
>  
> +	i2c0: i2c@...09000 {
> +		compatible = "brcm,iproc-i2c";
> +		reg = <0x18009000 0x50>;
> +		interrupts = <GIC_SPI 121 IRQ_TYPE_NONE>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		clock-frequency = <100000>;

Should not this have a:
		status = "disabled"

property by default such that boards can override this by phandle when
there are actual I2C devices available?

> +	};
> +
>  	lcpll0: lcpll0@...0c100 {
>  		#clock-cells = <1>;
>  		compatible = "brcm,nsp-lcpll0";
> 

-- 
Florian