linux-kernel - Re: [PATCH V3 2/3] gpio: gpio-pmic-eic-sprd: Make the irqchip immutable

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Date:   Thu, 29 Dec 2022 10:57:29 +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 2/3] gpio: gpio-pmic-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-pmic-eic-sprd.c | 29 ++++++++++++++++++-----------
>   1 file changed, 18 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c
> index e518490c4b68..add15416f7a6 100644
> --- a/drivers/gpio/gpio-pmic-eic-sprd.c
> +++ b/drivers/gpio/gpio-pmic-eic-sprd.c
> @@ -47,7 +47,6 @@ enum {
>   /**
>    * struct sprd_pmic_eic - PMIC EIC controller
>    * @chip: the gpio_chip structure.
> - * @intc: the irq_chip structure.
>    * @map:  the regmap from the parent device.
>    * @offset: the EIC controller's offset address of the PMIC.
>    * @reg: the array to cache the EIC registers.
> @@ -56,7 +55,6 @@ enum {
>    */
>   struct sprd_pmic_eic {
>   	struct gpio_chip chip;
> -	struct irq_chip intc;
>   	struct regmap *map;
>   	u32 offset;
>   	u8 reg[CACHE_NR_REGS];
> @@ -151,15 +149,21 @@ static void sprd_pmic_eic_irq_mask(struct irq_data *data)
>   {
>   	struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
>   	struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip);
> +	irq_hw_number_t hwirq = irqd_to_hwirq(data);

Please keep the same coding style in this driver:
u32 offset = irqd_to_hwirq(data);

>   
>   	pmic_eic->reg[REG_IE] = 0;
>   	pmic_eic->reg[REG_TRIG] = 0;
> +
> +	gpiochip_disable_irq(chip, hwirq);
>   }
>   
>   static void sprd_pmic_eic_irq_unmask(struct irq_data *data)
>   {
>   	struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
>   	struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip);
> +	irq_hw_number_t hwirq = irqd_to_hwirq(data);

Ditto

> +
> +	gpiochip_enable_irq(chip, hwirq);
>   
>   	pmic_eic->reg[REG_IE] = 1;
>   	pmic_eic->reg[REG_TRIG] = 1;
> @@ -292,6 +296,17 @@ static irqreturn_t sprd_pmic_eic_irq_handler(int irq, void *data)
>   	return IRQ_HANDLED;
>   }
>   
> +static const struct irq_chip pmic_eic_irq_chip = {
> +	.name			= "sprd-pmic-eic-gpio",

Should be 'sprd-pmic-eic'.

With above fixes, you can add
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

> +	.irq_mask		= sprd_pmic_eic_irq_mask,
> +	.irq_unmask		= sprd_pmic_eic_irq_unmask,
> +	.irq_set_type		= sprd_pmic_eic_irq_set_type,
> +	.irq_bus_lock		= sprd_pmic_eic_bus_lock,
> +	.irq_bus_sync_unlock	= sprd_pmic_eic_bus_sync_unlock,
> +	.flags			= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
> +	GPIOCHIP_IRQ_RESOURCE_HELPERS,
> +};
> +
>   static int sprd_pmic_eic_probe(struct platform_device *pdev)
>   {
>   	struct gpio_irq_chip *irq;
> @@ -338,16 +353,8 @@ static int sprd_pmic_eic_probe(struct platform_device *pdev)
>   	pmic_eic->chip.set = sprd_pmic_eic_set;
>   	pmic_eic->chip.get = sprd_pmic_eic_get;
>   
> -	pmic_eic->intc.name = dev_name(&pdev->dev);
> -	pmic_eic->intc.irq_mask = sprd_pmic_eic_irq_mask;
> -	pmic_eic->intc.irq_unmask = sprd_pmic_eic_irq_unmask;
> -	pmic_eic->intc.irq_set_type = sprd_pmic_eic_irq_set_type;
> -	pmic_eic->intc.irq_bus_lock = sprd_pmic_eic_bus_lock;
> -	pmic_eic->intc.irq_bus_sync_unlock = sprd_pmic_eic_bus_sync_unlock;
> -	pmic_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE;
> -
>   	irq = &pmic_eic->chip.irq;
> -	irq->chip = &pmic_eic->intc;
> +	gpio_irq_chip_set_chip(irq, &pmic_eic_irq_chip);
>   	irq->threaded = true;
>   
>   	ret = devm_gpiochip_add_data(&pdev->dev, &pmic_eic->chip, pmic_eic);