I know that some interrupts have both for PM8150B, but for PM6150 all interrupts are rising.
Please look at the downstream kernel:
https://git.codelinaro.org/clo/la/kernel/msm-4.14/-/blob/187022f2721d584ac4ec92c0ac1af77da487521d/arch/arm64/boot/dts/qcom/pm6150.dtsi#L319
https://git.codelinaro.org/clo/la/kernel/msm-4.14/-/blob/187022f2721d584ac4ec92c0ac1af77da487521d/arch/arm64/boot/dts/qcom/pm8150b.dtsi#L292