imx: mx25: Remove SION bit in all pin-mux

["Benoît Thébaudeau" <benoit@wsystem.com>]

On 24/01/2018 at 16:43, Michael Nazzareno Trimarchi wrote:
> On Wed, Jan 24, 2018 at 4:39 PM, Benoît Thébaudeau <benoit@wsystem.com> wrote:
>> On 24/01/2018 at 16:34, Benoît Thébaudeau wrote:
>>> On 24/01/2018 at 16:26, Michael Nazzareno Trimarchi wrote:
>>>> On Wed, Jan 24, 2018 at 4:14 PM, Fabio Estevam <festevam@gmail.com> wrote:
>>>>> On Wed, Jan 24, 2018 at 12:56 PM, Michael Trimarchi
>>>>> <michael@amarulasolutions.com> wrote:
>>>>>> SION bit should be used in the situation that we need
>>>>>> to read back the value of a pin and should be set by
>>>>>> default.
>>>
>>> You remove this bit because it should be set by default? This sentence is
>>> confusing.
> 
> English is wrong ;)
> 
> SION bit as a specific purpose to read back value that is set in
> output. You don't need
> and it's not set in any freescale board. If you need to set you need
> to add to your peripheral.

Unless there is a NEW_PAD_CTRL()-like mechanism for SION, all these definitions
should be kept in iomux-mx25.h in order not to redefine the register offsets
everywhere. AFAIK, all the Freescale boards use the definitions from
iomux-mx25.h too.

> The only case you need maybe is the data[0] of sdcard.

And eSDHC CMD, and I²C probably too. Yet, you are also removing SION in these
cases. I have 3 i.M25-based boards working fine with SION. ;) Can you explain
the precise issue that you are trying to fix (which pin)?

Best regards,
Benoît
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