Re: [PATCH 0/4] arm64: dts: freescale: Add Toradex iMX95 overlays

[Frank Li <Frank.li@oss.nxp.com>]

On Tue, Sep 22, 2026 at 06:58:46PM +0200, Francesco Dolcini wrote:
> On Tue, Sep 22, 2026 at 11:07:44AM -0500, Frank Li wrote:
> > On Tue, Sep 22, 2026 at 04:33:45PM +0200, Ernest Van Hoecke wrote:
> > > This series adds device tree overlays for the Toradex Verdin, Aquila,
> > > and SMARC iMX95 SoMs.
> > >
> > > The series adds support for:
> > > - NAU8822 Bridge Tied Load configuration on the Verdin Development Board
> > > - UART_4 reservation for Cortex-M7 firmware on Verdin and Aquila
> > > - SER0 reservation for Cortex-M7 firmware on SMARC
> > >
> > > The UART overlays mark the port as reserved so Linux does not claim it.
> > > Firmware remains responsible for configuring the UART and its pads.
> > >
> > > The Makefile entries build standalone DTBOs and ready-to-use composed
> > > DTBs for the corresponding Development Boards.
> > >
> > > Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
> > > ---
> > > Ernest Van Hoecke (4):
> > >       arm64: dts: freescale: imx95-verdin: Add NAU8822 Bridge Tied Load
> > >       arm64: dts: freescale: imx95-verdin: Add Cortex-M7 UART_4 overlay
> > >       arm64: dts: freescale: imx95-aquila: Add Cortex-M7 UART_4 overlay
> >
> > both reserved lpuart2, can you share one dtso?
>
> The comment in the DT file must be different because it's important to
> reference the actual board it applies to.
>
> So to fulfill this request we would need to add a common dtsi, include
> it from two different dtso files.

No, direct use one dtso. see

https://elixir.bootlin.com/linux/v7.3-rc3/source/arch/arm64/boot/dts/freescale/imx-pcie0-ep.dtso

And makefile to check how apply the same dtso for difference boards

Frank

>
> This to save 2 lines of duplicated code, `&lpuart2 { status = "reserved"; };`.
>
> To me this is just worst than the current proposal.
>
> Francesco
>
>