[PATCH 11/16] board: compulab: Convert imx8mm-cl-iot-gate to UCLASS extension framework

Kory Maincent kory.maincent at bootlin.com
Fri Oct 3 18:33:51 CEST 2025


Migrate CompuLab imx8mm-cl-iot-gate board extension detection from legacy
implementation to the new UCLASS-based extension board framework.

Signed-off-by: Kory Maincent <kory.maincent at bootlin.com>
---
 arch/arm/mach-imx/imx8m/Kconfig                    |  4 +-
 .../imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c        | 60 ++++++++++------------
 2 files changed, 30 insertions(+), 34 deletions(-)

diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index e7bc154b805..5324eff3084 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -359,14 +359,14 @@ config TARGET_IMX8MM_CL_IOT_GATE
 	select IMX8MM
 	select SUPPORT_SPL
 	select IMX8M_LPDDR4
-	select SUPPORT_EXTENSION_SCAN
+	select SUPPORT_DM_EXTENSION_SCAN
 
 config TARGET_IMX8MM_CL_IOT_GATE_OPTEE
 	bool "CompuLab iot-gate-imx8 with optee support"
 	select IMX8MM
 	select SUPPORT_SPL
 	select IMX8M_LPDDR4
-	select SUPPORT_EXTENSION_SCAN
+	select SUPPORT_DM_EXTENSION_SCAN
 
 config TARGET_IMX8MP_RSB3720A1_4G
 	bool "Support i.MX8MP RSB3720A1 4G"
diff --git a/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c b/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c
index bda7aac5be4..4fc87944810 100644
--- a/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c
+++ b/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c
@@ -434,9 +434,9 @@ static int iot_gate_imx8_update_ext_ied(void)
 	return 0;
 }
 
-int extension_board_scan(struct list_head *extension_list)
+static int iot_gate_imx8_extension_board_scan(struct list_head *extension_list)
 {
-	struct extension *extension = NULL;
+	struct extension extension = {0}, *_extension = NULL;
 	int i;
 	int ret = 0;
 
@@ -446,25 +446,21 @@ int extension_board_scan(struct list_head *extension_list)
 	case IOT_GATE_EXT_EMPTY:
 		break;
 	case IOT_GATE_EXT_CAN:
-		extension = calloc(1, sizeof(struct extension));
-		snprintf(extension->name, sizeof(extension->name),
+		snprintf(extension.name, sizeof(extension.name),
 			 "IOT_GATE_EXT_CAN");
 		break;
 	case IOT_GATE_EXT_IED:
-		extension = calloc(1, sizeof(struct extension));
-		snprintf(extension->name, sizeof(extension->name),
+		snprintf(extension.name, sizeof(extension.name),
 			 "IOT_GATE_EXT_IED");
-		snprintf(extension->overlay, sizeof(extension->overlay),
+		snprintf(extension.overlay, sizeof(extension.overlay),
 			 "imx8mm-cl-iot-gate-ied.dtbo");
 		break;
 	case IOT_GATE_EXT_POE:
-		extension = calloc(1, sizeof(struct extension));
-		snprintf(extension->name, sizeof(extension->name),
+		snprintf(extension.name, sizeof(extension.name),
 			 "IOT_GATE_EXT_POE");
 		break;
 	case IOT_GATE_EXT_POEV2:
-		extension = calloc(1, sizeof(struct extension));
-		snprintf(extension->name, sizeof(extension->name),
+		snprintf(extension.name, sizeof(extension.name),
 			 "IOT_GATE_EXT_POEV2");
 		break;
 	default:
@@ -473,9 +469,11 @@ int extension_board_scan(struct list_head *extension_list)
 	}
 
 	if (extension) {
-		snprintf(extension->owner, sizeof(extension->owner),
+		snprintf(extension.owner, sizeof(extension.owner),
 			 "Compulab");
-		list_add_tail(&extension->list, extension_list);
+		_estension = alist_add(extension_list, extension);
+		if (!_extension)
+			return -ENOMEM;
 		ret = 1;
 	} else
 		return ret;
@@ -484,44 +482,38 @@ int extension_board_scan(struct list_head *extension_list)
 
 	iot_gate_imx8_update_ext_ied();
 	for (i=0; i<ARRAY_SIZE(iot_gate_imx8_ext_ied_id); i++) {
-		extension = NULL;
+		memset(&extension, 0, sizeof(extension));
 		switch (iot_gate_imx8_ext_ied_id[i]) {
 		case IOT_GATE_IMX8_CARD_ID_EMPTY:
 			break;
 		case IOT_GATE_IMX8_CARD_ID_RS_485:
-			extension = calloc(1, sizeof(struct extension));
-			snprintf(extension->name, sizeof(extension->name),
+			snprintf(extension.name, sizeof(extension.name),
 				 "IOT_GATE_IMX8_CARD_ID_RS_485");
 			break;
 		case IOT_GATE_IMX8_CARD_ID_RS_232:
-			extension = calloc(1, sizeof(struct extension));
-			snprintf(extension->name, sizeof(extension->name),
+			snprintf(extension.name, sizeof(extension.name),
 				 "IOT_GATE_IMX8_CARD_ID_RS_232");
 			break;
 		case IOT_GATE_IMX8_CARD_ID_CAN:
-			extension = calloc(1, sizeof(struct extension));
-			snprintf(extension->name, sizeof(extension->name),
+			snprintf(extension.name, sizeof(extension.name),
 				 "IOT_GATE_IMX8_CARD_ID_CAN");
-			snprintf(extension->overlay, sizeof(extension->overlay),
+			snprintf(extension.overlay, sizeof(extension.overlay),
 				 "imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
 			break;
 		case IOT_GATE_IMX8_CARD_ID_TPM:
-			extension = calloc(1, sizeof(struct extension));
-			snprintf(extension->name, sizeof(extension->name),
+			snprintf(extension.name, sizeof(extension.name),
 				 "IOT_GATE_IMX8_CARD_ID_TPM");
-			snprintf(extension->overlay, sizeof(extension->overlay),
+			snprintf(extension.overlay, sizeof(extension.overlay),
 				 "imx8mm-cl-iot-gate-ied-tpm%d.dtbo", i);
 			break;
 		case IOT_GATE_IMX8_CARD_ID_CL420:
-			extension = calloc(1, sizeof(struct extension));
-			snprintf(extension->name, sizeof(extension->name),
+			snprintf(extension.name, sizeof(extension.name),
 				 "IOT_GATE_IMX8_CARD_ID_CL420");
-			snprintf(extension->overlay, sizeof(extension->overlay),
+			snprintf(extension.overlay, sizeof(extension.overlay),
 				 "imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
 			break;
 		case IOT_GATE_IMX8_CARD_ID_DI4O4:
-			extension = calloc(1, sizeof(struct extension));
-			snprintf(extension->name, sizeof(extension->name),
+			snprintf(extension.name, sizeof(extension.name),
 				 "IOT_GATE_IMX8_CARD_ID_DI4O4");
 			break;
 		default:
@@ -530,11 +522,13 @@ int extension_board_scan(struct list_head *extension_list)
 			break;
 		}
 		if (extension) {
-			snprintf(extension->owner, sizeof(extension->owner),
+			snprintf(extension.owner, sizeof(extension.owner),
 				 "Compulab");
-			snprintf(extension->other, sizeof(extension->other),
+			snprintf(extension.other, sizeof(extension.other),
 				 "On slot %d", i);
-			list_add_tail(&extension->list, extension_list);
+			_extension = alist_add(extension_list, extension);
+			if (!_extension)
+				return -ENOMEM;
 			ret = ret + 1;
 		}
 	}
@@ -542,6 +536,8 @@ int extension_board_scan(struct list_head *extension_list)
         return ret;
 }
 
+U_BOOT_EXTENSION(iot_gate_imx8_extension, iot_gate_imx8_extension_board_scan);
+
 static int setup_mac_address(void)
 {
 	unsigned char enetaddr[6];

-- 
2.43.0



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