env/ext4.c: allow loading from an EXT4 partition on the MMC boot device
This parallels what I added for FAT in commit 6731bef6966, allowing the
environment to be found in a specific partition on the device that the
board's mmc_get_env_dev() returns. On the Banana Pi R2 that means the
device that U-Boot was loaded from; either the internal eMMC or an SD
card.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/env/ext4.c b/env/ext4.c
index f823b69..e666f7b 100644
--- a/env/ext4.c
+++ b/env/ext4.c
@@ -41,7 +41,21 @@
__weak const char *env_ext4_get_dev_part(void)
{
+#ifdef CONFIG_MMC
+ static char *part_str;
+
+ if (!part_str) {
+ part_str = CONFIG_ENV_EXT4_DEVICE_AND_PART;
+ if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc") && part_str[0] == ':') {
+ part_str = "0" CONFIG_ENV_EXT4_DEVICE_AND_PART;
+ part_str[0] += mmc_get_env_dev();
+ }
+ }
+
+ return part_str;
+#else
return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
+#endif
}
static int env_ext4_save_buffer(env_t *env_new)