netdev - Re: [PATCH v4 net-next 2/3] net: macb: Add NPx macb config using USRIO

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Date:	Tue, 5 Jan 2016 13:20:50 +0100
From:	Neil Armstrong <narmstrong@...libre.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>, davem@...emloft.net,
	harini.katakam@...inx.com, boris.brezillon@...e-electrons.com,
	alexandre.belloni@...e-electrons.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, joshc@...com, devicetree@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v4 net-next 2/3] net: macb: Add NPx macb config using
 USRIO_DISABLED cap

On 01/04/2016 11:38 AM, Nicolas Ferre wrote:
> Le 04/01/2016 10:42, Neil Armstrong a écrit :
>>  static const struct macb_config zynqmp_config = {
>>  	.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO,
>> @@ -2801,6 +2806,7 @@ static const struct of_device_id macb_dt_ids[] = {
>>  	{ .compatible = "cdns,at32ap7000-macb" },
>>  	{ .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
>>  	{ .compatible = "cdns,macb" },
>> +	{ .compatible = "cdns,npx-macb", .data = &npx_config },
> 
> I can accept that, but I think that you'd better make your device tree
> compatibility string *not* generic. Name it by the first NPx SoC or
> perfectly compatible SoC family that has this configuration and you'll
> be able to make the NP(x+1) compatible with it.
Well, the first Soc having this configuration is Np4, would cdns,np4-macb be ok ?
> 
> It has proven to be much more future proof and even if in the early days
> of DT on ARM we accepted some binding with generic strings like this one
> below, It has proven to be a mistake.
> 
>>  	{ .compatible = "cdns,gem", .data = &pc302gem_config },
>>  	{ .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config },
>>
> 
> 

Neil
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