The arch/arm/boot/dts/stm32mp151.dtsi specifies one interrupt for the RTC node, while the expectation of the RTC driver is two interrupts on STM32MP15xx SoC, one connected to GIC interrupt controller and another one to EXTI. Per STM32MP15xx reference manual, the two interrupts serve the same purpose, except the EXTI one can also wake the system up. The EXTI driver already internally handles this GIC and EXTI duality and maps the EXTI interrupt onto GIC during runtime, and only uses the EXTI for wake up functionality. Therefore, fix the driver such that if on STM32MP15xx there is only one interrupt specified in the DT, use that interrupt as EXTI interrupt and set it as wake up source. This fixes the following warning in the kernel log on STM32MP15xx: " stm32_rtc 5c004000.rtc: error -ENXIO: IRQ index 1 not found stm32_rtc 5c004000.rtc: alarm can't wake up the system: -6 " This also fixes the system wake up via built-in RTC using e.g.: $ rtcwake -s 5 -m mem Fixes: b72252b6580c ("rtc: stm32: add stm32mp1 rtc support") Signed-off-by: Marek Vasut <marex@xxxxxxx> --- Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx> Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> Cc: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx> Cc: Amelie DELAUNAY <amelie.delaunay@xxxxxxxxxxx> Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: linux-rtc@xxxxxxxxxxxxxxx Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx --- drivers/rtc/rtc-stm32.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/rtc/rtc-stm32.c b/drivers/rtc/rtc-stm32.c index 229cb2847cc48..72994b9f95319 100644 --- a/drivers/rtc/rtc-stm32.c +++ b/drivers/rtc/rtc-stm32.c @@ -780,14 +780,15 @@ static int stm32_rtc_probe(struct platform_device *pdev) ret = device_init_wakeup(&pdev->dev, true); if (rtc->data->has_wakeirq) { - rtc->wakeirq_alarm = platform_get_irq(pdev, 1); + rtc->wakeirq_alarm = platform_get_irq_optional(pdev, 1); if (rtc->wakeirq_alarm > 0) { ret = dev_pm_set_dedicated_wake_irq(&pdev->dev, rtc->wakeirq_alarm); - } else { + } else if (rtc->wakeirq_alarm == -EPROBE_DEFER) { ret = rtc->wakeirq_alarm; - if (rtc->wakeirq_alarm == -EPROBE_DEFER) - goto err; + goto err; + } else { + ret = dev_pm_set_wake_irq(&pdev->dev, rtc->irq_alarm); } } if (ret) -- 2.39.2