[PATCH AUTOSEL 4.19 42/52] irqchip/stm32: Don't clear rising/falling config registers at init

[Sasha Levin]

From: Fabien Dessenne <fabien.dessenne@xxxxxx>

[ Upstream commit 0dda09666f50eae9c5b794dd89b1fd8a8d89d714 ]

Falling and rising configuration and status registers are not banked.
As they are shared with M4 co-processor, they should not be cleared
at probe time, else M4 co-processor configuration will be lost.

Fixes: f9fc1745501e ("irqchip/stm32: Add host and driver data structures")
Signed-off-by: Loic Pallardy <loic.pallardy@xxxxxx>
Signed-off-by: Fabien Dessenne <fabien.dessenne@xxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/irqchip/irq-stm32-exti.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index 0a2088e12d96..97b27f338c30 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -650,11 +650,6 @@ stm32_exti_chip_data *stm32_exti_chip_init(struct stm32_exti_host_data *h_data,
 	 */
 	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->rpr_ofst);
-	if (stm32_bank->fpr_ofst != UNDEF_REG)
-		writel_relaxed(~0UL, base + stm32_bank->fpr_ofst);
 
 	pr_info("%s: bank%d, External IRQs available:%#x\n",
 		node->full_name, bank_idx, irqs_mask);
-- 
2.19.1