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arm64: dts: qcom: qrb2210-rb1: Fix UART3 wakeup IRQ storm

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For BT use cases, pins are configured with pull-up state in sleep state
to avoid noise. If IRQ type is configured as level high and the GPIO line
is also in a high state, it causes continuous interrupt assertions leading
to an IRQ storm when wakeup irq enables at system suspend/runtime suspend.

Switching to edge-triggered interrupt (IRQ_TYPE_EDGE_FALLING) resolves
this by only triggering on state transitions (high-to-low) rather than
maintaining sensitivity to the static level state, effectively preventing
the continuous interrupt condition and eliminating the wakeup IRQ storm.

Fixes: 9380e0a1d4 ("arm64: dts: qcom: qrb2210-rb1: add Bluetooth support")
Signed-off-by: Praveen Talari <praveen.talari@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251110101043.2108414-2-praveen.talari@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Praveen Talari
2025-11-10 15:40:40 +05:30
committed by Bjorn Andersson
parent bba4562adc
commit 9c92d36b0b
1 changed files with 1 additions and 1 deletions
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arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
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@@ -704,7 +704,7 @@ key_volp_n: key-volp-n-state {
&uart3 {
/delete-property/ interrupts;
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";