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Date: Tue, 28 Jan 2014 00:45:05 +0400 From: Max Filippov <jcmvbkbc@...il.com> To: Florian Fainelli <f.fainelli@...il.com> Cc: Rob Herring <robherring2@...il.com>, "linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>, netdev <netdev@...r.kernel.org>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Chris Zankel <chris@...kel.net>, Marc Gauthier <marc@...ence.com>, "David S. Miller" <davem@...emloft.net>, Grant Likely <grant.likely@...aro.org>, Rob Herring <rob.herring@...xeda.com> Subject: Re: [PATCH 3/3] net: ethoc: document OF bindings On Mon, Jan 27, 2014 at 11:45 PM, Florian Fainelli <f.fainelli@...il.com> wrote: > 2014-01-27 Max Filippov <jcmvbkbc@...il.com>: >> On Mon, Jan 27, 2014 at 6:10 PM, Rob Herring <robherring2@...il.com> wrote: >>> On Sun, Jan 26, 2014 at 9:59 PM, Max Filippov <jcmvbkbc@...il.com> wrote: [...] >>>> --- /dev/null >>>> +++ b/Documentation/devicetree/bindings/net/opencores-ethoc.txt >>>> @@ -0,0 +1,25 @@ >>>> +* OpenCores MAC 10/100 Mbps >>>> + >>>> +Required properties: >>>> +- compatible: Should be "opencores,ethoc". >>> >>> There are not different versions of IP or is the version probeable? >> >> AFAIK there's single version of this 10/100 MAC. >> It doesn't have any identification registers. > > Since this is an IP block that people can modify due to its open > source nature, it would have been good to define a revision register > or such which would allow software to gate specific code based on that > revision. Probably yes, though I haven't heard of any modified versions of this MAC out there. [...] >>>> +Examples: >>>> + >>>> + enet0: ethoc@...30000 { >>>> + compatible = "opencores,ethoc"; >>>> + reg = <0xfd030000 0x4000 0xfd800000 0x4000>; >>>> + interrupts = <1>; >>>> + local-mac-address = [00 50 c2 13 6f 00]; >>>> + clock-frequency = <50000000>; >>>> + mii-mgmt-clock-frequency = <5000000>; > > 5Mhz management clock? Can't you make it work with the standard 2.5Mhz > management clock? Is not there a risk not to be able to "talk" to some > PHY chips out there which do not support > 2.5Mhz management clock? Yes I can, it just didn't occur to me that there is a standard 2.5MHz setting. > Since this is an ethoc specific property, should it be prefixed with "ethoc,"? Is it worth keeping this parameter at all, or just always default to 2.5MHz? -- Thanks. -- Max -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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