[PATCH v5 21/23] irqchip/riscv-rpmi-sysmsi: Add ACPI support

[Thomas Gleixner]

On Wed, Jun 11 2025 at 11:52, Anup Patel wrote:
> @@ -211,6 +213,9 @@ static int rpmi_sysmsi_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct rpmi_sysmsi_priv *priv;
> +	struct irq_domain *msi_domain;
> +	struct fwnode_handle *fwnode;
> +	u32 id;
>  	int rc;
>  
>  	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> @@ -241,6 +246,22 @@ static int rpmi_sysmsi_probe(struct platform_device *pdev)
>  	}
>  	priv->nr_irqs = rc;
>  
> +	fwnode = dev_fwnode(dev);
> +	if (is_acpi_node(fwnode)) {
> +		u32 nr_irqs;
> +
> +		rc = riscv_acpi_get_gsi_info(fwnode, &priv->gsi_base, &id,
> +					     &nr_irqs, NULL);
> +		if (rc) {
> +			dev_err(dev, "failed to find GSI mapping\n");
> +			return rc;
> +		}
> +
> +		/* Update with actual GSI range */
> +		if (nr_irqs != priv->nr_irqs)
> +			riscv_acpi_update_gsi_range(priv->gsi_base, priv->nr_irqs);
> +	}
> +
>  	/* Set the device MSI domain if not available */
>  	if (!dev_get_msi_domain(dev)) {
>  		/*
> @@ -250,8 +271,13 @@ static int rpmi_sysmsi_probe(struct platform_device *pdev)
>  		 * then we need to set it explicitly before using any platform
>  		 * MSI functions.
>  		 */
> -		if (dev_of_node(dev))
> +		if (is_of_node(fwnode)) {
>  			of_msi_configure(dev, dev_of_node(dev));
> +		} else if (is_acpi_device_node(fwnode)) {
> +			msi_domain = irq_find_matching_fwnode(imsic_acpi_get_fwnode(dev),
> +							      DOMAIN_BUS_PLATFORM_MSI);

msi_domain is only used here and so it should be declared in this scope
and not at the top of the function.

> +			dev_set_msi_domain(dev, msi_domain);
> +		}

Other than that:

Reviewed-by: Thomas Gleixner <tglx at linutronix.de>