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Subject: RE: [PATCH 00/14] arm64: dts: imx8mp: correct pad settings
Thread-Topic: [PATCH 00/14] arm64: dts: imx8mp: correct pad settings
Thread-Index: AQHYhf8Ork2RMCYk4EmRaOhujPGoda1bAQ8AgAARnbA=
Date:   Wed, 22 Jun 2022 08:14:30 +0000
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> Subject: Re: [PATCH 00/14] arm64: dts: imx8mp: correct pad settings
>=20
> Hello,
>=20
> On Wed, Jun 22, 2022 at 02:13:56PM +0800, 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.
>=20
> I wonder how you found these. Some time ago I wrote a tool for such issue=
s[1].
> Currently it only supports i.MX25, i.MX6DL and i.MX6Q, but extending it f=
or
> the other SoCs should be only some industious effort.

We have customer has question about the dts pad settings in U-Boot. Since t=
he
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.

>=20
> Best regards
> Uwe
>=20
> [1]
> https://git.pengutronix.de/cgit/tools/dt-utils/tree/src/dtblint-imx-pinmu=
x.c
>=20
>=20
> --
> Pengutronix e.K.                           | Uwe Kleine-K=F6nig
> |
> Industrial Linux Solutions                 | https://www.pengutronix.de/
> |