[U-Boot] [PATCH] imx: mx25: Remove SION bit in all pin-mux

[Michael Nazzareno Trimarchi]

Hi

On Wed, Jan 24, 2018 at 6:05 PM, Benoît Thébaudeau <benoit at wsystem.com> wrote:
> Hi Michael,
>
> On 24/01/2018 at 17:46, Michael Nazzareno Trimarchi wrote:
>> On Wed, Jan 24, 2018 at 5:38 PM, Fabio Estevam <festevam at gmail.com> wrote:
>>> Hi Michael,
>>>
>>> [Removed usb list as this is off-topic for them]
>>>
>>> On Wed, Jan 24, 2018 at 2:31 PM, Michael Nazzareno Trimarchi
>>> <michael at amarulasolutions.com> wrote:
>>>
>>>> Can you check where SION bit is mandatory for mx25? I have on IMX51
>>>> some PINMUX where sion is enabled.
>>>> I can clean up a bit the patch to just minimize the change. We have for example:
>>>
>>> I think it depends on the pin function per board design, no?
>>>
>>
>> I don't have a pdk and it's difficult to find them so I need to check. Anyway
>> some revision of the firmware on this pendrive are working but the latest one
>> is not working. I have a lot of pen drives and all of them are fully working.
>>
>>> Benoît brings a good point: what is the exact pin that causes the USB
>>> failure on your case?
>>
>> I have tested only with uart and already it does not let it work
>> properly. So I can try
>> to limit in my boot case but I don't think that having SION bit
>> pre-defined it's valid
>> at all. We have a limited number of pin mux with SION enable on any nxp
>> architecture right now for every architecture.
>>
>> * Benoit * can you test them? I will provide a better changeset let
>> sdcard and some ethernet pin
>> in the right configuation (even ethernet was working without SION enable)
>
> Not sure I can find time for that. Perhaps in a few days.
>

>From the datasheet I have:

Software Input On Field. Force the selected mux mode Input path no
matter of MUX_MODE functionality.
1: Force input path of pad A14.
0: Input Path is determined by functionality of the selected mux mode
(regular).

So i think that in case of some peripheral this is not relevant but I
need confirmation

Michael

> Best regards,
> Benoît



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| Michael Nazzareno Trimarchi                     Amarula Solutions BV |
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