Re: [PATCH 1/5] arm64: dts: qcom: sm8550: add PCIe MHI register regions and port labels

[Dmitry Baryshkov]

On Sat, Apr 04, 2026 at 10:50:54AM +0100, Joe Sandom via B4 Relay wrote:
> From: Joe Sandom <jsandom@xxxxxxxx>
> 
> Add the MHI register regions to the pcie0 and pcie1 controller nodes
> so that the MHI bus layer can access controller registers directly.
> 
> Also add labels to the root port nodes (pcie0_port0, pcie1_port0) to
> allow board DTS files to reference them for adding endpoint devices
> to each pcie root port.

Two separate changes, please.

> 
> Signed-off-by: Joe Sandom <jsandom@xxxxxxxx>
> ---
>  arch/arm64/boot/dts/qcom/sm8550.dtsi | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> index 912525e9bca6f5e1cbb8887ee0bf9e39650dc4ff..d4caf4d00832d7f1e8f65bf2bc873cddadc42168 100644
> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> @@ -1964,8 +1964,9 @@ pcie0: pcie@1c00000 {
>  			      <0 0x60000000 0 0xf1d>,
>  			      <0 0x60000f20 0 0xa8>,
>  			      <0 0x60001000 0 0x1000>,
> -			      <0 0x60100000 0 0x100000>;
> -			reg-names = "parf", "dbi", "elbi", "atu", "config";
> +			      <0 0x60100000 0 0x100000>,
> +				  <0 0x01C03000 0 0x1000>;

Lowercase the hex, align vertically.

> +			reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
>  			#address-cells = <3>;
>  			#size-cells = <2>;
>  			ranges = <0x01000000 0x0 0x00000000 0x0 0x60200000 0x0 0x100000>,
> @@ -2092,7 +2093,7 @@ opp-16000000-3 {
>  				};
>  			};
>  
> -			pcieport0: pcie@0 {
> +			pcie0_port0: pcie@0 {
>  				device_type = "pci";
>  				reg = <0x0 0x0 0x0 0x0 0x0>;
>  				bus-range = <0x01 0xff>;
> @@ -2138,8 +2139,9 @@ pcie1: pcie@1c08000 {
>  			      <0x0 0x40000000 0x0 0xf1d>,
>  			      <0x0 0x40000f20 0x0 0xa8>,
>  			      <0x0 0x40001000 0x0 0x1000>,
> -			      <0x0 0x40100000 0x0 0x100000>;
> -			reg-names = "parf", "dbi", "elbi", "atu", "config";
> +			      <0x0 0x40100000 0x0 0x100000>,
> +				  <0x0 0x01C0B000 0x0 0x1000>;
> +			reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
>  			#address-cells = <3>;
>  			#size-cells = <2>;
>  			ranges = <0x01000000 0x0 0x00000000 0x0 0x40200000 0x0 0x100000>,
> @@ -2288,7 +2290,7 @@ opp-32000000-4 {
>  				};
>  			};
>  
> -			pcie@0 {
> +			pcie1_port0: pcie@0 {
>  				device_type = "pci";
>  				reg = <0x0 0x0 0x0 0x0 0x0>;
>  				bus-range = <0x01 0xff>;
> 
> -- 
> 2.34.1
> 
> 

-- 
With best wishes
Dmitry