[PATCH v4 1/3] dt-bindings: PCI: qcom: ep: Add interconnects path

[PATCH v4 1/3] dt-bindings: PCI: qcom: ep: Add interconnects path

[Krishna chaitanya chundru]

Some platforms may not boot if a device driver doesn't
initialize the interconnect path. Mostly it is handled
by the bootloader but we have starting to see cases
where bootloader simply ignores them.

Add the "pcie-mem" interconnect path as a required property
to the bindings.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
---
 Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
index b3c22eb..154a08e 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
@@ -70,6 +70,13 @@ properties:
     description: GPIO used as WAKE# output signal
     maxItems: 1
 
+  interconnects:
+    maxItems: 1
+
+  interconnect-names:
+    items:
+      - const: pcie-mem
+
   resets:
     maxItems: 1
 
@@ -97,6 +104,8 @@ required:
   - interrupts
   - interrupt-names
   - reset-gpios
+  - interconnects
+  - interconnect-names
   - resets
   - reset-names
   - power-domains
@@ -165,7 +174,9 @@ examples:
   - |
     #include <dt-bindings/clock/qcom,gcc-sdx55.h>
     #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interconnect/qcom,sdx55.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
+
     pcie_ep: pcie-ep@1c00000 {
         compatible = "qcom,sdx55-pcie-ep";
         reg = <0x01c00000 0x3000>,
@@ -192,6 +203,8 @@ examples:
         interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>,
                      <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>;
         interrupt-names = "global", "doorbell";
+        interconnects = <&system_noc MASTER_PCIE &mc_virt SLAVE_EBI_CH0>;
+        interconnect-names = "pcie-mem";
         reset-gpios = <&tlmm 57 GPIO_ACTIVE_LOW>;
         wake-gpios = <&tlmm 53 GPIO_ACTIVE_LOW>;
         resets = <&gcc GCC_PCIE_BCR>;
-- 
2.7.4

[PATCH v4 2/3] arm: dts: qcom: sdx55: Add interconnect path

[Krishna chaitanya chundru]

Add pcie-mem interconnect path to sdx55 target.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
---
 arch/arm/boot/dts/qcom-sdx55.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-sdx55.dtsi b/arch/arm/boot/dts/qcom-sdx55.dtsi
index 342c3d1..acc79eb 100644
--- a/arch/arm/boot/dts/qcom-sdx55.dtsi
+++ b/arch/arm/boot/dts/qcom-sdx55.dtsi
@@ -421,6 +421,10 @@
 				     <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "global",
 					  "doorbell";
+
+			interconnects = <&system_noc MASTER_PCIE &mc_virt SLAVE_EBI_CH0>;
+			interconnect-names = "pcie-mem";
+
 			resets = <&gcc GCC_PCIE_BCR>;
 			reset-names = "core";
 			power-domains = <&gcc PCIE_GDSC>;
-- 
2.7.4

Re: [PATCH v4 1/3] dt-bindings: PCI: qcom: ep: Add interconnects path

[Krzysztof Kozlowski]

On 14/06/2023 16:24, Krishna chaitanya chundru wrote:
> Some platforms may not boot if a device driver doesn't
> initialize the interconnect path. Mostly it is handled
> by the bootloader but we have starting to see cases
> where bootloader simply ignores them.
> 
> Add the "pcie-mem" interconnect path as a required property
> to the bindings.
> 

I did not receive third patch in the series, so I hope you corrected all
DTS in the linux-next (sdx55, sdx65).


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof