netdev - Re: [PATCH 2/3] Documentation: add Device tree bindings for Hisilicon hix5hd2 ethernet

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Date:	Tue, 20 May 2014 10:12:23 +0800
From:	zhangfei <zhangfei.gao@...aro.org>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	davem@...emloft.net, arnd@...db.de, f.fainelli@...il.com,
	mark.rutland@....com, David.Laight@...LAB.COM,
	eric.dumazet@...il.com, haifeng.yan@...aro.org, jchxue@...il.com
CC:	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 2/3] Documentation: add Device tree bindings for Hisilicon
 hix5hd2 ethernet



On 05/20/2014 12:26 AM, Sergei Shtylyov wrote:
> On 05/19/2014 04:57 PM, Zhangfei Gao wrote:
>> +Hisilicon hix5hd2 Ethernet Controller
>> +
>> +Required properties:
>> +- compatible: should be "hisilicon,hix5hd2-mac".
>> +- reg : Specifies base physical address(s) and size of the device
>> registers.
>
>     Er, I must note that the colon style here is not consistent with the
> rest of the properties, i.e. there's space before the colon here, while
> in other cases there's none.
Will remove the space.

>
>> +  The first region is the mac register base and size.
>
>     s/mac/MAC/.
>
>> +  The second region is external interface control register.
>> +- interrupts: Should contain the MAC interrupts
>> +- #address-cells: Must be <1>.
>> +- #size-cells: Must be <0>.
>
>     Descriptions should consistently start with a lower case, I think...
OK.
>
>> +- phy-mode: see ethernet.txt [1].
>> +- phy-handle: see ethernet.txt [1].
>> +- mac-address: see ethernet.txt [1].
>> +- clocks: clock phandle and specifier pair.
>> +
>> +- phy subnode: inherits from phy binding [2]
>
>     s/phy/PHY/.
>
>> +
>> +[1] Documentation/devicetree/bindings/net/ethernet.txt
>> +[2] Documentation/devicetree/bindings/net/phy.txt
>> +
>> +Example:
>> +    gmac0: ethernet@...40000 {
>> +        compatible = "hisilicon,hix5hd2-mac";
>> +        reg = <0xf9840000 0x1000>,<0xf984300c 0x4>;
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +        phy-handle = <&phy0>;
>> +        phy-mode = "mii";
>> +        mac-address = [00 00 00 00 00 00];
>
>     Don't think that's a good value, unless this is only a placeholder.
Yes, mac-address is placeholder here and would be filled by boot-loader.
Otherwise random mac addr will be used.

>
>> +        interrupts = <0 71 4>;
>> +        clocks = <&clock HIX5HD2_MAC0_CLK>;
>> +
>> +        phy0: ethernet-phy@2 {
>
>     I'd rather label ut phy2...
OK
>
>> +            reg = <2>;
>> +            compatible = "ethernet-phy-ieee802.3-c22";
>
>     This is the default "compatible", i.e. there's no need to specify
> it, IIRC.
Got it, find it is clarified in phy.txt.

Thanks
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