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[4/8] arm64: dts: qcom: sm8650: Add missing properties for cryptobam

Message ID 20250212-bam-dma-fixes-v1-4-f560889e65d8@linaro.org (mailing list archive)
State New
Headers show
Series dmaengine: qcom: bam_dma: Fix DT error handling for num-channels/ees | expand

Commit Message

Stephan Gerhold Feb. 12, 2025, 5:03 p.m. UTC 
num-channels and qcom,num-ees are required for BAM nodes without clock,
because the driver cannot ensure the hardware is powered on when trying to
obtain the information from the hardware registers. Specifying the node
without these properties is unsafe and has caused early boot crashes for
other SoCs before [1, 2].

Add the missing information from the hardware registers to ensure the
driver can probe successfully without causing crashes.

[1]: https://lore.kernel.org/r/CY01EKQVWE36.B9X5TDXAREPF@fairphone.com/
[2]: https://lore.kernel.org/r/20230626145959.646747-1-krzysztof.kozlowski@linaro.org/

Cc: stable@vger.kernel.org
Fixes: 10e024671295 ("arm64: dts: qcom: sm8650: add interconnect dependent device nodes")
Signed-off-by: Stephan Gerhold <stephan.gerhold@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8650.dtsi | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
index 86684cb9a9325618ddb74458621cf4bbdc1cc0d1..c8a2a76a98f000610f33cd1ada82eebd6ae95343 100644
--- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
@@ -2533,6 +2533,8 @@  cryptobam: dma-controller@1dc4000 {
 				 <&apps_smmu 0x481 0>;
 
 			qcom,ee = <0>;
+			qcom,num-ees = <4>;
+			num-channels = <20>;
 			qcom,controlled-remotely;
 		};