On 27 July 2015 21:48:40 CEST, Stephen Warren <swar...@wwwdotorg.org> wrote:
>On 07/20/2015 04:35 PM, Marcel Ziswiler wrote:
>> From: Marcel Ziswiler <marcel.ziswi...@toradex.com>
>>
>> Unfortunately currently both Apalis T30 as well as Colibri T30 crash
>> upon starting USB host support. This is due to the following patch
>not
>> having taken into account that our T30 device trees were defaulting
>to
>> peripheral only mode instead of otg:
>>
>> commit ddb9a502d18008e845d5a8fa03ec48630fa77fb7
>> dm: usb: tegra: Move most of init/uninit into a function
>
>> diff --git a/arch/arm/dts/tegra30-colibri.dts
>b/arch/arm/dts/tegra30-colibri.dts
>
>> /* EHCI instance 0: USB1_DP/N -> USBC_P/N */
>> usb@7d000000 {
>> status = "okay";
>> - dr_mode = "peripheral";
>> + dr_mode = "otg";
>> };
>
>Is there SW control over driving VBUS for this port? If not, I don't
>think switching to otg is correct/possible.
Yes, on Apalis T30 it is software controlled while on Colibri T30 it is
hardware controlled (e.g. resp. cable decides). So this actually does work.
>It seems better to fix the crash in the code?
I kind of agree but this is outside the scope of this patch which just changes
this to what everybody else does which actually works.
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