linux-kernel - Re: [PATCH v2] arm: dts: AM43x: Add usb_otg

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Date:	Tue, 9 Jul 2013 17:22:43 +0530
From:	George Cherian <george.cherian@...com>
To:	<balbi@...com>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <linux@....linux.org.uk>,
	<benoit.cousson@...aro.org>, <afzal@...com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] arm: dts: AM43x: Add usb_otg_hs node

On 7/9/2013 4:57 PM, Felipe Balbi wrote:
> Hi,
>
> On Tue, Jul 09, 2013 at 04:51:35PM +0530, George Cherian wrote:
>>>> +				compatible = "snps,dwc3";
>>>> +				reg = <0x48390000 0xcfff>;
>>> weird size, shouldn't this be 0xd000 then the size would be exactly
>>> 52KiB
>> okay
> btw, the reason here is that when you call devm_ioremap_resource(), that
> will call resource_size() which does:
>
> 	size = res->end - res->start - 1;
>
> so you need this extra 1 on the size when passing it via DT.

agreed.
>>> Another thing: am437x has 4 instances of this IP, why are you adding
>>> only one ?
>> AM437x has got only 2 instances. I have verified only one on HAPS so
>> adding only one.
> weird, on my TRM I see for dwc3 but 2 PHYs.

Please confirm whether you are looking at am437x TRM or dra7x TRM?
dra7x has 4 dwc3 and 2 internal  phys and 2 external phys
>>> And why aren't you pasing the PHY nodes here ? The device
>>> won't work without its PHYs.
>> Yes true, again in HAPS I  didnt have any PHY configuration to be done.
> alright, but we should still pass the PHY right ? once silicon comes,
> we want this to work without any further changers.

okay will add phy nodes and 2 instances of dwc3.



-- 
-George

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