[PATCH v2 06/14] arm64: dts: qcom: qrb4210-rb2: Fix UART3 wakeup IRQ storm

Dmitry Baryshkov dmitry.baryshkov at oss.qualcomm.com
Mon Jan 5 17:01:16 PST 2026


Follow commit 9c92d36b0b1e ("arm64: dts: qcom: qrb2210-rb1: Fix UART3
wakeup IRQ storm") and apply the similar fix to the RB2 platform.

Having RX / TX pins as pull up and wakup interrupt as high-level
triggered generates an interrupt storm when trying to suspend the
device. Avoid the storm by using the falling edge trigger (as all other
platforms do).

Fixes: cab60b166575 ("arm64: dts: qcom: qrb4210-rb2: Enable bluetooth")
Reviewed-by: Konrad Dybcio <konrad.dybcio at oss.qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index 0cd36c54632f..5f8613150bdd 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -694,7 +694,7 @@ sdc2_card_det_n: sd-card-det-n-state {
 
 &uart3 {
 	interrupts-extended = <&intc GIC_SPI 330 IRQ_TYPE_LEVEL_HIGH>,
-			      <&tlmm 11 IRQ_TYPE_LEVEL_HIGH>;
+			      <&tlmm 11 IRQ_TYPE_EDGE_FALLING>;
 	pinctrl-0 = <&uart3_default>;
 	pinctrl-1 = <&uart3_sleep>;
 	pinctrl-names = "default", "sleep";

-- 
2.47.3




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