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-rw-r--r--drivers/irqchip/irq-stm32-exti.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index 8f409a95918f..477d0faf0ea2 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -258,7 +258,16 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks,
writel_relaxed(~0UL, base + stm32_bank->rtsr_ofst);
irqs_mask = readl_relaxed(base + stm32_bank->rtsr_ofst);
nr_exti = fls(readl_relaxed(base + stm32_bank->rtsr_ofst));
+
+ /*
+ * This IP has no reset, so after hot reboot we should
+ * clear registers to avoid residue
+ */
+ writel_relaxed(0, base + stm32_bank->imr_ofst);
+ writel_relaxed(0, base + stm32_bank->emr_ofst);
writel_relaxed(0, base + stm32_bank->rtsr_ofst);
+ writel_relaxed(0, base + stm32_bank->ftsr_ofst);
+ writel_relaxed(~0UL, base + stm32_bank->pr_ofst);
pr_info("%s: bank%d, External IRQs available:%#x\n",
node->full_name, i, irqs_mask);