[PATCH 3/3] arm: dts: imx8mp: Sync with Linux 6.3

[Rasmus Villemoes]

On 20/05/2023 00.26, Adam Ford wrote:
> On Fri, May 19, 2023 at 5:19 PM Tim Harvey <tharvey at gateworks.com> wrote:
>>
>> On Wed, May 3, 2023 at 9:11 AM Tim Harvey <tharvey at gateworks.com> wrote:
>>>
>> Fabio,
>>
>> Apparently I didn't do a very good job of testing this. This patch is
>> causing imx8mp-venice-* and imx8mp-evk boards to no longer boot with
>> no SPL banner. The specific change that causes breakage is the one
>> that encapsulates the spi/uart/flexcan children with
>> spba-bus at 30800000.
> 
> The SPI, UART, and Flexcan are part of the spba-bus.
> 
> We'll need to add the spba bus to imx8mp-u-boot.dtsi. Since it had no
> node name, it'll have to fall under aip3.
> 
> Try this:
> 
> diff --git a/arch/arm/dts/imx8mp-u-boot.dtsi b/arch/arm/dts/imx8mp-u-boot.dtsi
> index 18d1728e1d..0e6811b129 100644
> --- a/arch/arm/dts/imx8mp-u-boot.dtsi
> +++ b/arch/arm/dts/imx8mp-u-boot.dtsi
> @@ -44,6 +44,10 @@
> 
>  &aips3 {
>         bootph-pre-ram;
> +
> +       spba-bus at 30800000 {
> +               bootph-pre-ram;
> +       };
>  };
> 
>  &iomuxc {

This begs the question: Why don't these tags just implicitly propagate
to parent nodes? It's a U-Boot specific tool (fdtgrep) that makes use of
them, no? So making the rule be "keep this node if it _or any
descendant_ has that tag" should be possible.

This has probably been answered somewhere before.

Rasmus