[PATCH v2 1/2] irqchip: stm32: don't clear rising/falling config registers at init

From: Fabien Dessenne <fabien.dessenne@st.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Jason Cooper <jason@lakedaemon.net>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	<linux-kernel@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<linux-arm-kernel@lists.infradead.org>
Cc: Fabien Dessenne <fabien.dessenne@st.com>,
	Benjamin Gaignard <benjamin.gaignard@st.com>
Subject: [PATCH v2 1/2] irqchip: stm32: don't clear rising/falling config registers at init
Date: Thu, 7 Mar 2019 18:36:50 +0100	[thread overview]
Message-ID: <1551980211-9709-2-git-send-email-fabien.dessenne@st.com> (raw)
In-Reply-To: <1551980211-9709-1-git-send-email-fabien.dessenne@st.com>

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.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
---
 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 6edfd4b..dab37fb 100644
--- 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);
 
-- 
2.7.4

