Messages in this thread Patch in this message | | | From | Ludovic Barre <> | Subject | [PATCH v2 5/9] irqchip: stm32: fix initial values | Date | Wed, 25 Oct 2017 19:11:01 +0200 |
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From: Ludovic Barre <ludovic.barre@st.com>
-After cold boot, imr default value depends on hardware configuration. -After hot reboot the registers must be cleared to avoid residue.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com> --- 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 d872dea..9715d57 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -260,7 +260,16 @@ __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); -- 2.7.4
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