linux-kernel - [PATCH 1/4] dt-bindings: PCI: qcom,pcie-sc8180x: Drop unrelated clocks from PCIe hosts

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Message-Id: <20250521-topic-8150_pcie_drop_clocks-v1-1-3d42e84f6453@oss.qualcomm.com>
Date: Wed, 21 May 2025 15:38:10 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: Qiang Yu <quic_qianyu@...cinc.com>, 
 Ziyue Zhang <quic_ziyuzhan@...cinc.com>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH 1/4] dt-bindings: PCI: qcom,pcie-sc8180x: Drop unrelated
 clocks from PCIe hosts

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

The TBU clock belongs to the Translation Buffer Unit, part of the SMMU.
The ref clock is already being driven upstream through some of the
branches.

Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 .../devicetree/bindings/pci/qcom,pcie-sc8180x.yaml         | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.yaml
index 331fc25d7a17d657d4db3863f0c538d0e44dc840..34a4d7b2c8459aeb615736f54c1971014adb205f 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.yaml
@@ -33,8 +33,8 @@ properties:
       - const: mhi # MHI registers
 
   clocks:
-    minItems: 8
-    maxItems: 8
+    minItems: 6
+    maxItems: 6
 
   clock-names:
     items:
@@ -44,8 +44,6 @@ properties:
       - const: bus_master # Master AXI clock
       - const: bus_slave # Slave AXI clock
       - const: slave_q2a # Slave Q2A clock
-      - const: ref # REFERENCE clock
-      - const: tbu # PCIe TBU clock
 
   interrupts:
     minItems: 8
@@ -117,17 +115,13 @@ examples:
                      <&gcc GCC_PCIE_0_CFG_AHB_CLK>,
                      <&gcc GCC_PCIE_0_MSTR_AXI_CLK>,
                      <&gcc GCC_PCIE_0_SLV_AXI_CLK>,
-                     <&gcc GCC_PCIE_0_SLV_Q2A_AXI_CLK>,
-                     <&gcc GCC_PCIE_0_CLKREF_CLK>,
-                     <&gcc GCC_AGGRE_NOC_PCIE_TBU_CLK>;
+                     <&gcc GCC_PCIE_0_SLV_Q2A_AXI_CLK>;
             clock-names = "pipe",
                           "aux",
                           "cfg",
                           "bus_master",
                           "bus_slave",
-                          "slave_q2a",
-                          "ref",
-                          "tbu";
+                          "slave_q2a";
 
             dma-coherent;
 

-- 
2.49.0