RE: [PATCH 00/14] arm64: dts: imx8mp: correct pad settings

[Peng Fan]

> Subject: Re: [PATCH 00/14] arm64: dts: imx8mp: correct pad settings
> 
> Hello,
> 
> On Wed, Jun 22, 2022 at 02:13:56PM +0800, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@xxxxxxx>
> >
> > 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.
> 
> I wonder how you found these. Some time ago I wrote a tool for such issues[1].
> Currently it only supports i.MX25, i.MX6DL and i.MX6Q, but extending it for
> the other SoCs should be only some industious effort.

We have customer has question about the dts pad settings in U-Boot. Since the
dts in U-Boot was synced from Linux kernel tree, and I found
the current settings in kernel dts not match with latest reference manual.

Regards,
Peng.

> 
> Best regards
> Uwe
> 
> [1]
> https://git.pengutronix.de/cgit/tools/dt-utils/tree/src/dtblint-imx-pinmux.c
> 
> 
> --
> Pengutronix e.K.                           | Uwe Kleine-König
> |
> Industrial Linux Solutions                 | https://www.pengutronix.de/
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