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

Message ID 20230912-spi-qup-dvfs-v1-3-3e38aa09c2bd@kernkonzept.com
State New
Headers
Series spi: qup: Allow scaling power domains and interconnect |

Commit Message

Stephan Gerhold Sept. 12, 2023, 2:30 p.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.

Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
---
 Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Krzysztof Kozlowski Sept. 13, 2023, 8:19 a.m. UTC | #1 
On 12/09/2023 16:30, Stephan Gerhold wrote:
> 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.
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
> ---
>  Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml | 5 +++++
>  1 file changed, 5 insertions(+)

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

Best regards,
Krzysztof
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>;
     };