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[2/3] dt-bindings: i2c: qup: Document interconnects

Message ID 20231128-i2c-qup-dvfs-v1-2-59a0e3039111@kernkonzept.com
State New
Headers show
Series i2c: qup: Allow scaling power domains and interconnect | expand

Commit Message

Stephan Gerhold Nov. 28, 2023, 9:48 a.m. UTC
When the I2C 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/i2c/qcom,i2c-qup.yaml | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Rob Herring Nov. 28, 2023, 5:51 p.m. UTC | #1
On Tue, 28 Nov 2023 10:48:36 +0100, Stephan Gerhold wrote:
> When the I2C 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/i2c/qcom,i2c-qup.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml
index fc3077a7af0d..758d8f6321e1 100644
--- a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml
+++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml
@@ -40,6 +40,9 @@  properties:
       - const: tx
       - const: rx
 
+  interconnects:
+    maxItems: 1
+
   interrupts:
     maxItems: 1
 
@@ -73,6 +76,7 @@  unevaluatedProperties: false
 examples:
   - |
     #include <dt-bindings/clock/qcom,gcc-msm8998.h>
+    #include <dt-bindings/interconnect/qcom,msm8996.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/power/qcom-rpmpd.h>
 
@@ -91,6 +95,7 @@  examples:
         pinctrl-1 = <&blsp1_i2c1_sleep>;
         power-domains = <&rpmpd MSM8909_VDDCX>;
         required-opps = <&rpmpd_opp_svs_krait>;
+        interconnects = <&pnoc MASTER_BLSP_1 &bimc SLAVE_EBI_CH0>;
         clock-frequency = <400000>;
 
         #address-cells = <1>;