linux-kernel - Re: [PATCH v2 1/2] irqchip/stm32: Add irq retrigger support

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Date:   Wed, 19 Feb 2020 12:33:31 +0100
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
CC:     <marex@...x.de>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/2] irqchip/stm32: Add irq retrigger support

Fix Marc email address

On 2/18/20 2:12 PM, Alexandre Torgue wrote:
> This commit introduces retrigger support for stm32_ext_h chip.
> It consists to rise the GIC interrupt mapped to an EXTI line.
> 
> Signed-off-by: Alexandre Torgue <alexandre.torgue@...com>
> 
> diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
> index e00f2fa27f00..c971d115edb4 100644
> --- a/drivers/irqchip/irq-stm32-exti.c
> +++ b/drivers/irqchip/irq-stm32-exti.c
> @@ -604,12 +604,24 @@ static void stm32_exti_h_syscore_deinit(void)
>   	unregister_syscore_ops(&stm32_exti_h_syscore_ops);
>   }
>   
> +static int stm32_exti_h_retrigger(struct irq_data *d)
> +{
> +	struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
> +	const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
> +	void __iomem *base = chip_data->host_data->base;
> +	u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
> +
> +	writel_relaxed(mask, base + stm32_bank->swier_ofst);
> +
> +	return irq_chip_retrigger_hierarchy(d);
> +}
> +
>   static struct irq_chip stm32_exti_h_chip = {
>   	.name			= "stm32-exti-h",
>   	.irq_eoi		= stm32_exti_h_eoi,
>   	.irq_mask		= stm32_exti_h_mask,
>   	.irq_unmask		= stm32_exti_h_unmask,
> -	.irq_retrigger		= irq_chip_retrigger_hierarchy,
> +	.irq_retrigger		= stm32_exti_h_retrigger,
>   	.irq_set_type		= stm32_exti_h_set_type,
>   	.irq_set_wake		= stm32_exti_h_set_wake,
>   	.flags			= IRQCHIP_MASK_ON_SUSPEND,
>