board: sunxi: Convert extension support to UCLASS framework

Migrate sunxi board extension detection from legacy implementation to
the new UCLASS-based extension board framework.

Signed-off-by: Kory Maincent (TI.com) <[email protected]>

2 files changed, 15 insertions, 13 deletions

diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index b04ec671696..f5696199516 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -1223,7 +1223,7 @@ config BLUETOOTH_DT_DEVICE_FIXUP
 
 config CHIP_DIP_SCAN
 	bool "Enable DIPs detection for CHIP board"
-	select SUPPORT_EXTENSION_SCAN
+	select SUPPORT_DM_EXTENSION_SCAN
 	select W1
 	select W1_GPIO
 	select W1_EEPROM
diff --git a/board/sunxi/chip.c b/board/sunxi/chip.c
index 5e5ec0d1d89..b60a739df41 100644
--- a/board/sunxi/chip.c
+++ b/board/sunxi/chip.c
@@ -40,7 +40,8 @@ struct dip_w1_header {
 	u8      data[16];               /* user data, per-dip specific */
 } __packed;
 
-int extension_board_scan(struct list_head *extension_list)
+static int sunxi_extension_board_scan(struct udevice *udev,
+				      struct alist *extension_list)
 {
 	struct udevice *bus, *dev;
 	int num_dip = 0;
@@ -55,8 +56,8 @@ int extension_board_scan(struct list_head *extension_list)
 	}
 
 	for_each_w1_device(bus, &dev) {
+		struct extension dip = {0};
 		struct dip_w1_header w1_header;
-		struct extension *dip;
 		u32 vid;
 		u16 pid;
 
@@ -82,18 +83,19 @@ int extension_board_scan(struct list_head *extension_list)
 		       w1_header.product_name, pid,
 		       w1_header.vendor_name, vid);
 
-		dip = calloc(1, sizeof(struct extension));
-		if (!dip) {
-			printf("Error in memory allocation\n");
-			return num_dip;
-		}
-
-		snprintf(dip->overlay, sizeof(dip->overlay), "dip-%x-%x.dtbo",
+		snprintf(dip.overlay, sizeof(dip.overlay), "dip-%x-%x.dtbo",
 			 vid, pid);
-		strlcpy(dip->name, w1_header.product_name, sizeof(dip->name));
-		strlcpy(dip->owner, w1_header.vendor_name, sizeof(dip->owner));
-		list_add_tail(&dip->list, extension_list);
+		strlcpy(dip.name, w1_header.product_name, sizeof(dip.name));
+		strlcpy(dip.owner, w1_header.vendor_name, sizeof(dip.owner));
+		if (!alist_add(extension_list, dip))
+			return -ENOMEM;
 		num_dip++;
 	}
 	return num_dip;
 }
+
+U_BOOT_EXTENSION(dip, sunxi_extension_board_scan);
+
+U_BOOT_DRVINFO(dip) = {
+	.name = "dip",
+};