[PATCH v2 12/26] arm: dts: k3-am654: add needed regs to udmap nodes

[Nishanth Menon]

On 11:47-20231229, Bryan Brattlof wrote:
> Ethernet is one of a few IPs in U-Boot that depend on DMA to operate.
> However there are a few missing registers ranges in the udmap nodes
> need to properly setup DMA for the am65x.
> 
> A fix has been added to the Linux kernel[0] to add these ranges however
> they have not made it to a Linux tag. To keep DMA operational until the
> next DT sync from Linux, add these ranges to the *-u-boot.dtsi with a
> note for our future selves.
> 
> [0] https://lore.kernel.org/r/20231213135138.929517-2-vigneshr@ti.com
> 
> Tested-by: Tom Rini <trini at konsulko.com>
> Signed-off-by: Bryan Brattlof <bb at ti.com>
> ---
>  arch/arm/dts/k3-am654-base-board-u-boot.dtsi | 34 ++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/arch/arm/dts/k3-am654-base-board-u-boot.dtsi b/arch/arm/dts/k3-am654-base-board-u-boot.dtsi
> index a008af5b4a047..a24cb895e5578 100644
> --- a/arch/arm/dts/k3-am654-base-board-u-boot.dtsi
> +++ b/arch/arm/dts/k3-am654-base-board-u-boot.dtsi
> @@ -252,3 +252,37 @@
>  &mcu_r5fss0 {
>  	ti,cluster-mode = <0>;
>  };
> +
> +/*
> + * The DMA driver requires a few extra register ranges
> + * which are missing for the am65x. A patch has been
> + * sent and will be synced after the v6.8-rc1 linux
> + * tag is published
> + */
> +&main_udmap {
> +	reg = <0x0 0x31150000 0x0 0x100>,
> +	      <0x0 0x34000000 0x0 0x100000>,
> +	      <0x0 0x35000000 0x0 0x100000>,
> +	      <0x0 0x30b00000 0x0 0x10000>,
> +	      <0x0 0x30c00000 0x0 0x10000>,
> +	      <0x0 0x30d00000 0x0 0x8000>;
> +	reg-names = "gcfg", "rchanrt", "tchanrt",
> +		    "tchan", "rchan", "rflow";
> +};
> +
> +/*
> + * The DMA driver requires a few extra register ranges
> + * which are missing for the am65x. A patch has been
> + * sent and will be synced after the v6.8-rc1 linux
> + * tag is published
> + */
> +&mcu_udmap {
> +	reg = <0x0 0x285c0000 0x0 0x100>,
> +	      <0x0 0x2a800000 0x0 0x40000>,
> +	      <0x0 0x2aa00000 0x0 0x40000>,
> +	      <0x0 0x284a0000 0x0 0x4000>,
> +	      <0x0 0x284c0000 0x0 0x4000>,
> +	      <0x0 0x28400000 0x0 0x2000>;
> +	reg-names = "gcfg", "rchanrt", "tchanrt",
> +		    "tchan", "rchan", "rflow";
> +};

Hopefully we can get rid of this in 6.8-rc1 sync.

[...]
Reviewed-by: Nishanth Menon <nm at ti.com>

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D