i.MX7ULP: evk: Modify FDT file to disable SD3.0 for usb boot

Since the SD3.0 kernel driver needs M4 image support, this causes
problem for usb boot booting into kernel.  To decouple the relationship,
we modify the FDT file in u-boot to disable SD3.0.
So the kernel won't depend on M4 image.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/board/freescale/mx7ulp_evk/mx7ulp_evk.c b/board/freescale/mx7ulp_evk/mx7ulp_evk.c
index 3a12fe1551..7527263577 100644
--- a/board/freescale/mx7ulp_evk/mx7ulp_evk.c
+++ b/board/freescale/mx7ulp_evk/mx7ulp_evk.c
@@ -4,10 +4,12 @@
  */
 
 #include <common.h>
+#include <fdt_support.h>
 #include <asm/io.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/mx7ulp-pins.h>
 #include <asm/arch/iomux.h>
+#include <asm/mach-imx/boot_mode.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -45,3 +47,48 @@ int board_init(void)
 
 	return 0;
 }
+
+#if IS_ENABLED(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	const char *path;
+	int rc, nodeoff;
+
+	if (get_boot_device() == USB_BOOT) {
+		path = fdt_get_alias(blob, "mmc0");
+		if (!path) {
+			puts("Not found mmc0\n");
+			return 0;
+		}
+
+		nodeoff = fdt_path_offset(blob, path);
+		if (nodeoff < 0)
+			return 0;
+
+		printf("Found usdhc0 node\n");
+		if (fdt_get_property(blob, nodeoff, "vqmmc-supply",
+		    NULL) != NULL) {
+			rc = fdt_delprop(blob, nodeoff, "vqmmc-supply");
+			if (!rc) {
+				puts("Removed vqmmc-supply property\n");
+add:
+				rc = fdt_setprop(blob, nodeoff,
+						 "no-1-8-v", NULL, 0);
+				if (rc == -FDT_ERR_NOSPACE) {
+					rc = fdt_increase_size(blob, 32);
+					if (!rc)
+						goto add;
+				} else if (rc) {
+					printf("Failed to add no-1-8-v property, %d\n", rc);
+				} else {
+					puts("Added no-1-8-v property\n");
+				}
+			} else {
+				printf("Failed to remove vqmmc-supply property, %d\n", rc);
+			}
+		}
+	}
+
+	return 0;
+}
+#endif