imx: imx8m: soc: runtime drop extcon property from usbotg node

The extcon is an decrepted property and not used by upstream Linux and
NXP 5.10 kernel, so we remove it before kicking linux in case it is in
dts. Otherwise distro kernel will not able to have usb function.

Reviewed-by: Ye Li <[email protected]>
Signed-off-by: Peng Fan <[email protected]>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 1f484e1cb27..d47638e8a91 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -1152,6 +1152,37 @@ static int disable_cpu_nodes(void *blob, u32 disabled_cores)
 	return 0;
 }
 
+#if defined(CONFIG_IMX8MM)
+static int cleanup_nodes_for_efi(void *blob)
+{
+	static const char * const usbotg_path[] = {
+		"/soc@0/bus@32c00000/usb@32e40000",
+		"/soc@0/bus@32c00000/usb@32e50000"
+		};
+	int nodeoff, i, rc;
+
+	for (i = 0; i < ARRAY_SIZE(usbotg_path); i++) {
+		nodeoff = fdt_path_offset(blob, usbotg_path[i]);
+		if (nodeoff < 0)
+			continue; /* Not found, skip it */
+		debug("Found %s node\n", usbotg_path[i]);
+
+		rc = fdt_delprop(blob, nodeoff, "extcon");
+		if (rc == -FDT_ERR_NOTFOUND)
+			continue;
+		if (rc) {
+			printf("Unable to update property %s:%s, err=%s\n",
+			       usbotg_path[i], "extcon", fdt_strerror(rc));
+			return rc;
+		}
+
+		printf("Remove %s:%s\n", usbotg_path[i], "extcon");
+	}
+
+	return 0;
+}
+#endif
+
 int ft_system_setup(void *blob, struct bd_info *bd)
 {
 #ifdef CONFIG_IMX8MQ
@@ -1246,6 +1277,8 @@ usb_modify_speed:
 	else if (is_imx8mms() || is_imx8mmsl())
 		disable_cpu_nodes(blob, 3);
 
+	cleanup_nodes_for_efi(blob);
+
 #elif defined(CONFIG_IMX8MN)
 	if (is_imx8mnl() || is_imx8mndl() ||  is_imx8mnsl())
 		disable_gpu_nodes(blob);