[PATCH 3/3] arm64: tegra: Add iommu and dma properties for Tegra194 QSPI
From: Aaron Kling via B4 Relay
Date: Fri May 15 2026 - 16:35:59 EST
From: Aaron Kling <webgeek1234@xxxxxxxxx>
Without iommu and dma enabled, flash storage such as the spi-nor on the
p3668 module times out and cannot complete any transfers.
Signed-off-by: Aaron Kling <webgeek1234@xxxxxxxxx>
---
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 1d659454a6f9fe..0e0a20befe9e68 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -923,6 +923,10 @@ spi@3270000 {
<&bpmp TEGRA194_CLK_QSPI0_PM>;
clock-names = "qspi", "qspi_out";
resets = <&bpmp TEGRA194_RESET_QSPI0>;
+ iommus = <&smmu TEGRA194_SID_GPCDMA_0>;
+ dma-coherent;
+ dmas = <&gpcdma 5>, <&gpcdma 5>;
+ dma-names = "rx", "tx";
status = "disabled";
};
@@ -1013,6 +1017,10 @@ spi@3300000 {
<&bpmp TEGRA194_CLK_QSPI1_PM>;
clock-names = "qspi", "qspi_out";
resets = <&bpmp TEGRA194_RESET_QSPI1>;
+ iommus = <&smmu TEGRA194_SID_GPCDMA_0>;
+ dma-coherent;
+ dmas = <&gpcdma 6>, <&gpcdma 6>;
+ dma-names = "rx", "tx";
status = "disabled";
};
--
2.53.0