Re: [PATCH v2] EDAC/altera: use SDMMC compatibles to select A10/S10 IRQ layout

[Dinh Nguyen <dinguyen@kernel.org>]

Hi Rounak,

Thanks you for this patch and attempting to clean this up.

On 6/16/26 17:17, Rounak Das wrote:
> The SDMMC ECC IRQ layout selection uses CONFIG_64BIT to distinguish
> between Arria10 and Stratix10 paths. This is architecture-based,
> while the interrupt layout is a hardware property described by DT
> compatible strings.
> 
> Select the SDMMC IRQ layout via of_device_is_compatible() checks
> for altr,socfpga-s10-sdmmc-ecc in both altr_portb_setup() and
> altr_edac_a10_device_add().
> 
> This keeps the existing behavior for both SoCs while making the
> selection mechanism hardware-descriptive.
> 
> Signed-off-by: Rounak Das <rounakdas2025@gmail.com>
> ---
>   drivers/edac/altera_edac.c | 105 +++++++++++++++++++------------------
>   1 file changed, 53 insertions(+), 52 deletions(-)
> 
> diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
> index 4edd2088c2db6..161331ef57c01 100644
> --- a/drivers/edac/altera_edac.c
> +++ b/drivers/edac/altera_edac.c
> @@ -1548,15 +1548,16 @@ static int altr_portb_setup(struct altr_edac_device_dev *device)
>   
>   	/*
>   	 * Update the PortB IRQs - A10 has 4, S10 has 2, Index accordingly
> -	 *
> -	 * FIXME: Instead of ifdefs with different architectures the driver
> -	 *        should properly use compatibles.
>   	 */
> -#ifdef CONFIG_64BIT
> -	altdev->sb_irq = irq_of_parse_and_map(np, 1);
> -#else
> -	altdev->sb_irq = irq_of_parse_and_map(np, 2);
> -#endif
> +
> +	/* Using compatibles to determine the IRQ Index */
> +	bool is_s10_sdmmc = of_device_is_compatible(np, "altr,socfpga-s10-sdmmc-ecc");

How come you've decided to look at the sdmmc-ecc compatible instead of
"altr,socfpga-s10-ecc-manager"?

> +
> +	if (is_s10_sdmmc)
> +		altdev->sb_irq = irq_of_parse_and_map(np, 1);
> +	else
> +		altdev->sb_irq = irq_of_parse_and_map(np, 2);
> +
>   	if (!altdev->sb_irq) {
>   		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB SBIRQ alloc\n");
>   		rc = -ENODEV;
> @@ -1570,29 +1571,29 @@ static int altr_portb_setup(struct altr_edac_device_dev *device)
>   		goto err_release_group_1;
>   	}
>   
> -#ifdef CONFIG_64BIT
> -	/* Use IRQ to determine SError origin instead of assigning IRQ */
> -	rc = of_property_read_u32_index(np, "interrupts", 1, &altdev->db_irq);
> -	if (rc) {
> -		edac_printk(KERN_ERR, EDAC_DEVICE,
> -			    "Error PortB DBIRQ alloc\n");
> -		goto err_release_group_1;
> -	}
> -#else
> -	altdev->db_irq = irq_of_parse_and_map(np, 3);
> -	if (!altdev->db_irq) {
> -		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB DBIRQ alloc\n");
> -		rc = -ENODEV;
> -		goto err_release_group_1;
> -	}
> -	rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
> -			      prv->ecc_irq_handler, IRQF_TRIGGER_HIGH,
> -			      ecc_name, altdev);
> -	if (rc) {
> -		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
> -		goto err_release_group_1;
> +	if (is_s10_sdmmc) {
> +		/* Use IRQ to determine SError origin instead of assigning IRQ */
> +		rc = of_property_read_u32_index(np, "interrupts", 1, &altdev->db_irq);
> +		if (rc) {
> +			edac_printk(KERN_ERR, EDAC_DEVICE,
> +					"Error PortB DBIRQ alloc\n");
> +			goto err_release_group_1;
> +		}
> +	} else {
> +		altdev->db_irq = irq_of_parse_and_map(np, 3);
> +		if (!altdev->db_irq) {
> +			edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB DBIRQ alloc\n");
> +			rc = -ENODEV;
> +			goto err_release_group_1;
> +		}
> +		rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
> +					prv->ecc_irq_handler, IRQF_TRIGGER_HIGH,
> +					ecc_name, altdev);
> +		if (rc) {
> +			edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
> +			goto err_release_group_1;
> +		}
>   	}
> -#endif
>   
>   	rc = edac_device_add_device(dci);
>   	if (rc) {
> @@ -1974,29 +1975,29 @@ static int altr_edac_a10_device_add(struct altr_arria10_edac *edac,
>   		goto err_release_group1;
>   	}
>   
> -#ifdef CONFIG_64BIT
> -	/* Use IRQ to determine SError origin instead of assigning IRQ */
> -	rc = of_property_read_u32_index(np, "interrupts", 0, &altdev->db_irq);
> -	if (rc) {
> -		edac_printk(KERN_ERR, EDAC_DEVICE,
> -			    "Unable to parse DB IRQ index\n");
> -		goto err_release_group1;
> -	}
> -#else
> -	altdev->db_irq = irq_of_parse_and_map(np, 1);
> -	if (!altdev->db_irq) {
> -		edac_printk(KERN_ERR, EDAC_DEVICE, "Error allocating DBIRQ\n");
> -		rc = -ENODEV;
> -		goto err_release_group1;
> -	}
> -	rc = devm_request_irq(edac->dev, altdev->db_irq, prv->ecc_irq_handler,
> -			      IRQF_TRIGGER_HIGH,
> -			      ecc_name, altdev);
> -	if (rc) {
> -		edac_printk(KERN_ERR, EDAC_DEVICE, "No DBERR IRQ resource\n");
> -		goto err_release_group1;
> +	if (of_device_is_compatible(np, "altr,socfpga-s10-sdmmc-ecc")) {

I'd like to avoid adding more calls to get compatible in the code if 
possible.

> +		/* Use IRQ to determine SError origin instead of assigning IRQ */
> +		rc = of_property_read_u32_index(np, "interrupts", 0, &altdev->db_irq);
> +		if (rc) {
> +			edac_printk(KERN_ERR, EDAC_DEVICE,
> +					"Unable to parse DB IRQ index\n");
> +			goto err_release_group1;
> +		}
> +	} else {
> +		altdev->db_irq = irq_of_parse_and_map(np, 1);
> +		if (!altdev->db_irq) {
> +			edac_printk(KERN_ERR, EDAC_DEVICE, "Error allocating DBIRQ\n");
> +			rc = -ENODEV;
> +			goto err_release_group1;
> +		}
> +		rc = devm_request_irq(edac->dev, altdev->db_irq, prv->ecc_irq_handler,
> +					IRQF_TRIGGER_HIGH,
> +					ecc_name, altdev);
> +		if (rc) {
> +			edac_printk(KERN_ERR, EDAC_DEVICE, "No DBERR IRQ resource\n");
> +			goto err_release_group1;
> +		}
>   	}
> -#endif
>   
>   	rc = edac_device_add_device(dci);
>   	if (rc) {

Got a few checkpatch warnings:

CHECK: Alignment should match open parenthesis
#84: FILE: drivers/edac/altera_edac.c:1579:
+			edac_printk(KERN_ERR, EDAC_DEVICE,
+					"Error PortB DBIRQ alloc\n");

CHECK: Alignment should match open parenthesis
#95: FILE: drivers/edac/altera_edac.c:1590:
+		rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
+					prv->ecc_irq_handler, IRQF_TRIGGER_HIGH,

CHECK: Alignment should match open parenthesis
#136: FILE: drivers/edac/altera_edac.c:1983:
+			edac_printk(KERN_ERR, EDAC_DEVICE,
+					"Unable to parse DB IRQ index\n");

CHECK: Alignment should match open parenthesis
#147: FILE: drivers/edac/altera_edac.c:1994:
+		rc = devm_request_irq(edac->dev, altdev->db_irq, prv->ecc_irq_handler,
+					IRQF_TRIGGER_HIGH,


Thanks,
Dinh