[PATCH v7 09/15] gpiolib: regmap: add gpio_regmap_get_chip()

[Andy Shevchenko]

On Tue, Sep 15, 2026 at 07:15:39PM +0800, Long Zhao via B4 Relay wrote:

> Let drivers that implement a custom irqchip retrieve the gpio_chip
> after registration. Attach a caller-provided irq_domain only when it
> is present.

...

>  struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config)
>  {
> -	struct irq_domain *irq_domain;
>  	struct gpio_regmap *gpio;
>  	struct gpio_chip *chip;
>  	int ret;

>  #ifdef CONFIG_REGMAP_IRQ
>  	if (config->regmap_irq_chip) {
> +		struct irq_domain *irq_domain;
> +
>  		gpio->regmap_irq_line = config->regmap_irq_line;
>  		ret = regmap_add_irq_chip_fwnode(dev_fwnode(config->parent), config->regmap,
>  						 config->regmap_irq_line, config->regmap_irq_flags,
> @@ -420,12 +427,15 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config
>  			goto err_remove_gpiochip;
>  
>  		irq_domain = regmap_irq_get_domain(gpio->irq_chip_data);
> +		if (irq_domain) {
> +			ret = gpiochip_irqchip_add_domain(chip, irq_domain);
> +			if (ret)
> +				goto err_remove_gpiochip;
> +		}
>  	} else
>  #endif
> -	irq_domain = config->irq_domain;
> -
> -	if (irq_domain) {
> -		ret = gpiochip_irqchip_add_domain(chip, irq_domain);
> +	if (config->irq_domain) {
> +		ret = gpiochip_irqchip_add_domain(chip, config->irq_domain);
>  		if (ret)
>  			goto err_remove_gpiochip;
>  	}

I do not understand how it's different from the original one. Can you elaborate?

-- 
With Best Regards,
Andy Shevchenko