[PATCH v3 12/20] board: sunxi: Convert extension support to UCLASS framework

Kory Maincent (TI.com)
2025-10-13T13:34:39Z

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

Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com>
---

Change in v3:
- Use U_BOOT_DRVINFO.

Changes in v2:
- Fix build error.
---
arch/arm/mach-sunxi/Kconfig | 2 +-
board/sunxi/chip.c | 26 ++++++++++++++------------
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",
+};

--
2.43.0