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Commit 2ca6b9bc authored by Ludovic Barre's avatar Ludovic Barre Committed by Marc Zyngier
Browse files

irqchip/stm32: Fix initial values 



-After cold boot, imr default value depends on hardware configuration.
-After hot reboot the registers must be cleared to avoid residue.

Signed-off-by: default avatarLudovic Barre <ludovic.barre@st.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 539c603e

drivers/irqchip/irq-stm32-exti.c

+9 −0
Original line number Diff line number Diff line
@@ -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);