在 2022/6/22 14:31, Rasmus Villemoes 写道:
> On 22/06/2022 08.13, Peng Fan (OSS) wrote:
>> From: Peng Fan <peng.fan@nxp.com>
>>
>> i.MX8MP iomux pad BIT3 and BIT0 are reserved bits. Writing 1 to the
>> reserved bit will be ignored and reading will still return 0. Although
>> function not broken with reserved bits set, we should not set reserved
>> bits.
> Thank you, these have really been bugging my while trying to bring up an
> imx8mp-based board and adding the right pinmux settings - not knowing
> whether there was some undocumented effect from including one of those
> bits has led me astray more than once.
>
> One question: E.g. in patch 11, you change the setting from 0x49 to
> 0x40, which is of course exactly what the patch description says. But
> when bit 8 (PE) is not set, is there any effect from either setting of
> bit 6 (PUE)? Not that I suggest changing to 0x00, but I'm just curious.
Set PE/PUE, it depends on board design or whether need it. Because the
previous settings not set them, I not set them also, just
not touch the reserved bits.
THanks,
Peng.
>
> For the series:
>
> Reviewed-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>