diff options
| author | Praveen Talari <praveen.talari@oss.qualcomm.com> | 2025-11-10 15:40:40 +0530 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2025-11-14 08:51:15 -0600 |
| commit | 9c92d36b0b1ea8b2a19dbe0416434f3491dbfaaf (patch) | |
| tree | 0873d6944bce762b419cc1424e5e68e4e06f729a | |
| parent | bba4562adc06a9ca70bbbc9c3c17d4174e794bf9 (diff) | |
arm64: dts: qcom: qrb2210-rb1: Fix UART3 wakeup IRQ storm
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: 9380e0a1d449 ("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>
| -rw-r--r-- | arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts index e0e362b140ad..1b9ca957a94b 100644 --- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts +++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts @@ -704,7 +704,7 @@ &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"; |