linux-kernel - Re: [PATCH V3 1/3] gpio: eic-sprd: Make the irqchip immutable

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Date:   Thu, 29 Dec 2022 10:52:33 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     Cixi Geng <cixi.geng@...ux.dev>, linus.walleij@...aro.org,
        brgl@...ev.pl, orsonzhai@...il.com, zhang.lyra@...il.com
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        cixi.geng1@...soc.com
Subject: Re: [PATCH V3 1/3] gpio: eic-sprd: Make the irqchip immutable



On 12/28/2022 8:24 PM, Cixi Geng wrote:
> From: Cixi Geng <cixi.geng1@...soc.com>
> 
> Remove the irq_chip from pmic_eic structure,
> use the various calls by defining the statically
> irq_chip structure.
> 
> Signed-off-by: Cixi Geng <cixi.geng1@...soc.com>
> ---
>   drivers/gpio/gpio-eic-sprd.c | 23 ++++++++++++++---------
>   1 file changed, 14 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
> index 8d722e026e9c..86563c0604e8 100644
> --- a/drivers/gpio/gpio-eic-sprd.c
> +++ b/drivers/gpio/gpio-eic-sprd.c
> @@ -91,7 +91,6 @@ enum sprd_eic_type {
>   
>   struct sprd_eic {
>   	struct gpio_chip chip;
> -	struct irq_chip intc;
>   	void __iomem *base[SPRD_EIC_MAX_BANK];
>   	enum sprd_eic_type type;
>   	spinlock_t lock;
> @@ -255,6 +254,8 @@ static void sprd_eic_irq_mask(struct irq_data *data)
>   	default:
>   		dev_err(chip->parent, "Unsupported EIC type.\n");
>   	}
> +
> +	gpiochip_disable_irq(chip, offset);
>   }
>   
>   static void sprd_eic_irq_unmask(struct irq_data *data)
> @@ -263,6 +264,8 @@ static void sprd_eic_irq_unmask(struct irq_data *data)
>   	struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
>   	u32 offset = irqd_to_hwirq(data);
>   
> +	gpiochip_enable_irq(chip, offset);
> +
>   	switch (sprd_eic->type) {
>   	case SPRD_EIC_DEBOUNCE:
>   		sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IE, 1);
> @@ -564,6 +567,15 @@ static void sprd_eic_irq_handler(struct irq_desc *desc)
>   	chained_irq_exit(ic, desc);
>   }
>   
> +static const struct irq_chip sprd_eic_irq = {
> +	.name		= "sprd-eic-gpio",

Should be "sprd-eic". Otherwise looks good to me.
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

> +	.irq_ack	= sprd_eic_irq_ack,
> +	.irq_mask	= sprd_eic_irq_mask,
> +	.irq_unmask	= sprd_eic_irq_unmask,
> +	.irq_set_type	= sprd_eic_irq_set_type,
> +	.flags		= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
> +	GPIOCHIP_IRQ_RESOURCE_HELPERS,
> +};
>   static int sprd_eic_probe(struct platform_device *pdev)
>   {
>   	const struct sprd_eic_variant_data *pdata;
> @@ -626,15 +638,8 @@ static int sprd_eic_probe(struct platform_device *pdev)
>   		break;
>   	}
>   
> -	sprd_eic->intc.name = dev_name(&pdev->dev);
> -	sprd_eic->intc.irq_ack = sprd_eic_irq_ack;
> -	sprd_eic->intc.irq_mask = sprd_eic_irq_mask;
> -	sprd_eic->intc.irq_unmask = sprd_eic_irq_unmask;
> -	sprd_eic->intc.irq_set_type = sprd_eic_irq_set_type;
> -	sprd_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE;
> -
>   	irq = &sprd_eic->chip.irq;
> -	irq->chip = &sprd_eic->intc;
> +	gpio_irq_chip_set_chip(irq, &sprd_eic_irq);
>   	irq->handler = handle_bad_irq;
>   	irq->default_type = IRQ_TYPE_NONE;
>   	irq->parent_handler = sprd_eic_irq_handler;