From: Ludovic Barre <[email protected]> -after cold boot, imr default value depend of hw configuration -after hot reboot the registers must be cleared to avoid residue
Signed-off-by: Ludovic Barre <[email protected]> --- drivers/irqchip/irq-stm32-exti.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 69ae09d..3c7077d 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -246,7 +246,16 @@ static int __init stm32_exti_init(struct stm32_exti_bank **stm32_exti_banks, irqs_mask = readl_relaxed(base + stm32_bank->rtsr_ofst); stm32_bank->irqs_mask = irqs_mask; 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); -- 2.7.4
