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Mon, 04 Dec 2023 12:35:35 -0800 (PST) From: Ben Wolsieffer To: linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org Cc: Thomas Gleixner , Maxime Coquelin , Alexandre Torgue , Linus Walleij , Ben Wolsieffer Subject: [PATCH 1/2] irqchip/stm32-exti: support retriggering on STM32 MCUs Date: Mon, 4 Dec 2023 15:33:56 -0500 Message-ID: <20231204203357.2897008-2-ben.wolsieffer@hefring.com> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231204203357.2897008-1-ben.wolsieffer@hefring.com> References: <20231204203357.2897008-1-ben.wolsieffer@hefring.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231204_123544_071044_73A54939 X-CRM114-Status: GOOD ( 13.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org EXTI retriggering support was missing on STM32 MCUs. Retriggering is required to emulate GPIO level interrupts using edge interrupts in the STM32 pinctrl driver. Signed-off-by: Ben Wolsieffer --- drivers/irqchip/irq-stm32-exti.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 971240e2e31b..6b3f54457812 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -328,6 +328,18 @@ static void stm32_irq_handler(struct irq_desc *desc) chained_irq_exit(chip, desc); } +static int stm32_irq_retrigger(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; + u32 mask = BIT(d->hwirq % IRQS_PER_BANK); + + irq_reg_writel(gc, mask, stm32_bank->swier_ofst); + + return 0; +} + static int stm32_exti_set_type(struct irq_data *d, unsigned int type, u32 *rtsr, u32 *ftsr) { @@ -856,6 +868,7 @@ static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data, gc->chip_types->chip.irq_ack = stm32_irq_ack; gc->chip_types->chip.irq_mask = irq_gc_mask_clr_bit; gc->chip_types->chip.irq_unmask = irq_gc_mask_set_bit; + gc->chip_types->chip.irq_retrigger = stm32_irq_retrigger; gc->chip_types->chip.irq_set_type = stm32_irq_set_type; gc->chip_types->chip.irq_set_wake = irq_gc_set_wake; gc->suspend = stm32_irq_suspend; -- 2.42.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel