dt-bindings: PCI: qcom: Document ddrss_sf_tbu clock for sm8250

On SM8250 additional clock is required for PCIe devices to access NOC.
Document this requirement in devicetree bindings.

Link: https://lore.kernel.org/r/20210117013114.441973-2-dmitry.baryshkov@linaro.org
Fixes: 458168247ccc ("dt-bindings: pci: qcom: Document PCIe bindings for SM8250 SoC")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.txt b/Documentation/devicetree/bindings/pci/qcom,pcie.txt
index 3b55310..0da458a 100644 (file)
--- a/Documentation/devicetree/bindings/pci/qcom,pcie.txt
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie.txt
@@ -132,8 +132,20 @@
                        - "master_bus"  AXI Master clock
                        - "slave_bus"   AXI Slave clock
 
--clock-names:
-       Usage: required for sdm845 and sm8250
+- clock-names:
+       Usage: required for sdm845
+       Value type: <stringlist>
+       Definition: Should contain the following entries
+                       - "aux"         Auxiliary clock
+                       - "cfg"         Configuration clock
+                       - "bus_master"  Master AXI clock
+                       - "bus_slave"   Slave AXI clock
+                       - "slave_q2a"   Slave Q2A clock
+                       - "tbu"         PCIe TBU clock
+                       - "pipe"        PIPE clock
+
+- clock-names:
+       Usage: required for sm8250
        Value type: <stringlist>
        Definition: Should contain the following entries
                        - "aux"         Auxiliary clock
@@ -142,6 +154,7 @@
                        - "bus_slave"   Slave AXI clock
                        - "slave_q2a"   Slave Q2A clock
                        - "tbu"         PCIe TBU clock
+                       - "ddrss_sf_tbu" PCIe SF TBU clock
                        - "pipe"        PIPE clock
 
 - resets: