Re: [PATCH v3] EDAC/altera: use ECC manager compatible to select A10/S10 IRQ layout
From: Dinh Nguyen
Date: Thu Jun 25 2026 - 08:12:36 EST
On 6/16/26 19:07, 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.
Detect the SoC once at probe via the altr,socfpga-s10-ecc-manager
compatible on the ECC manager node, store it under the struct
altr_arria10_edac, and use it in altr_portb_setup() and
altr_edac_a10_device_add() in place of CONFIG_64BIT.
Selecting on the manager compatible keeps the decision SoC-wide and
correct for every ECC child device (OCRAM, USB, EMAC, SD/MMC),
and avoids repeated compatible lookups. Stratix10 and
Agilex both declare altr,socfpga-s10-ecc-manager and Arria10 does not,
so behaviour is unchanged on all three SoCs.
Signed-off-by: Rounak Das <rounakdas2025@xxxxxxxxx>
---
v3:
- Use compatible string altr,socfpga-s10-ecc-manager instead of
sdmmc-ecc (Dinh).
- Set it once into struct altr_arria10_edac::is_s10 to
avoid repeated of_device_is_compatible() calls (Dinh).
- Fix the checkpatch open-parenthesis alignment.
v2: https://lore.kernel.org/linux-edac/20260616081709.48774-1-rounakdas2025@xxxxxxxxx/
- Use legal name in Signed-off-by (Borislav).
drivers/edac/altera_edac.c | 106 +++++++++++++++++++------------------
drivers/edac/altera_edac.h | 1 +
2 files changed, 55 insertions(+), 52 deletions(-)
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 4edd2088c2db6..c728cd474abdf 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -1507,6 +1507,7 @@ static int altr_portb_setup(struct altr_edac_device_dev *device)
int edac_idx, rc;
struct device_node *np;
const struct edac_device_prv_data *prv = &a10_sdmmceccb_data;
+ bool is_s10 = device->edac->is_s10;
rc = altr_check_ecc_deps(device);
if (rc)
@@ -1548,15 +1549,14 @@ 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 */
+ if (is_s10)
+ 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 +1570,28 @@ 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) {
+ /* 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 +1973,29 @@ 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 (edac->is_s10) {
+ /* 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) {
@@ -2122,6 +2121,9 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, edac);
INIT_LIST_HEAD(&edac->a10_ecc_devices);
+ edac->is_s10 = of_device_is_compatible(pdev->dev.of_node,
+ "altr,socfpga-s10-ecc-manager");
+
I tested this version on both 32-bit and 64-bit platforms and there were no regression. But I'd like to see if we can avoid using of_device_is_compatible in runtime code and see if we can just bind to the "altr,socfpga-s10-ecc-manager" if possible?
Thanks,
Dinh