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Message-Id: <20230919-spi-qup-dvfs-v2-3-1bac2e9ab8db@kernkonzept.com>
Date: Tue, 19 Sep 2023 13:59:50 +0200
From: Stephan Gerhold <stephan.gerhold@...nkonzept.com>
To: Mark Brown <broonie@...nel.org>
Cc: Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
linux-arm-msm@...r.kernel.org, linux-spi@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Stephan Gerhold <stephan.gerhold@...nkonzept.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v2 3/4] spi: dt-bindings: qup: Document interconnects
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@...aro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@...nkonzept.com>
---
Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml | 5 +++++
1 file changed, 5 insertions(+)
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>;
};
--
2.39.2
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