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[v2,3/4] spi: dt-bindings: qup: Document interconnects

Message ID 20230919-spi-qup-dvfs-v2-3-1bac2e9ab8db@kernkonzept.com
State Accepted
Commit d15befc0cef42db7712714157d9483cab81149a1
Headers show
Series spi: qup: Allow scaling power domains and interconnect | expand

Commit Message

Stephan Gerhold Sept. 19, 2023, 11:59 a.m. UTC 
When the SPI QUP controller is used together with a DMA engine it needs
to vote for the interconnect path to the DRAM. Otherwise it may be
unable to access the memory quickly enough.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
---
 Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml
index 1e498a791406..88be13268962 100644
--- a/Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml
+++ b/Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml
@@ -44,6 +44,9 @@  properties:
       - const: tx
       - const: rx
 
+  interconnects:
+    maxItems: 1
+
   interrupts:
     maxItems: 1
 
@@ -67,6 +70,7 @@  unevaluatedProperties: false
 examples:
   - |
     #include <dt-bindings/clock/qcom,gcc-msm8996.h>
+    #include <dt-bindings/interconnect/qcom,msm8996.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/power/qcom-rpmpd.h>
 
@@ -84,6 +88,7 @@  examples:
         dma-names = "tx", "rx";
         power-domains = <&rpmpd MSM8996_VDDCX>;
         operating-points-v2 = <&spi_opp_table>;
+        interconnects = <&pnoc MASTER_BLSP_1 &bimc SLAVE_EBI_CH0>;
         #address-cells = <1>;
         #size-cells = <0>;
     };