[U-Boot] [PATCH v2] arm: dts: am33xx: introduce 'am33xx-u-boot.dtsi'

[Felix Brack <fb@ltec.ch>]

Hi Hannes,

On 06.02.19 12:49, Hannes Schmelzer wrote:
> commit fdce9d35dc36 ("arm: dts: am33xx: Sync dts with Linux 4.20.0")
> did remove the "u-boot,dm-spl" flag from the 'ocp' bus which was
> introduced with
> commit 19aa4ac09db9 ("dts: am33xx: add u-boot, dm-spl to ocp bus")
> 
> Due to this all boards having CONFIG_SPL_OF_CONTROL enabled are broken
> because they cannot bind/probe the boot-media interface during SPL
> stage.
> 
Not all boards were broken, only those not having set that property in
their proper -u-boot.dtsi or dts file (like am335x-pdu001-u-boot.dtsi).

> This commit introduces the 'am33xx-u-boot.dtsi' which is included with
> the auto include mechanism. The am33xx-u-boot-dtsi adds the important
> "u-boot,dm-pre-reloc" to the 'ocp bus' (the root bus of almost all
> peripherals, at least the bootable ones).
> 
If the new am33xx-u-boot.dtsi file gets include automatically then
setting the same property in the board specific dts/dtsi file is
redundant. Hence please remove the property from those files (like from
am335x-pdu001-u-boot.dtsi) and add those modified files to your patch.
Thus we have one single patch fixing this issue. Many thanks!

retards Felix

> The peripherials (mmc, spi, ...) needed during SPL stage need to be
> equipped with the 'u-boot,dm-pre-reloc' in their responsible dts file.
> 
> Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
> 
> ---
> 
> Changes in v2:
> - use u-boot,dm-pre-reloc instead u-boot,dm-spl
> - add am33xx-u-boot.dtsi instead modifying the am33xx.dtsi
> 
>  arch/arm/dts/am33xx-u-boot.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>  create mode 100644 arch/arm/dts/am33xx-u-boot.dtsi
> 
> diff --git a/arch/arm/dts/am33xx-u-boot.dtsi b/arch/arm/dts/am33xx-u-boot.dtsi
> new file mode 100644
> index 0000000..78f5e2c
> --- /dev/null
> +++ b/arch/arm/dts/am33xx-u-boot.dtsi
> @@ -0,0 +1,11 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2019 B&R Industrial Automation GmbH -
> + * https://www.br-automation.com/
> + */
> +
> +/ {
> +	ocp {
> +		u-boot,dm-pre-reloc;
> +	};
> +};
>