irqchip/stm32: Don't clear rising/falling config registers at init

[ 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@st.com>
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index a93296b9b45debecfb723e780f3f381b15660d2e..162a7f547f9ecae3aa76f7a7ef1bf02d03537fac 100644 (file)
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -735,11 +735,6 @@ 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("%pOF: bank%d\n", h_data->node, bank_idx);