env: ext4: Allow overriding interface, device and partition

For platform which can boot on different device, this allows
to override interface, device and partition from board code.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

diff --git a/env/ext4.c b/env/ext4.c
index 388474a11c750070e444609e2676878db71aa4bd..9947381bfdb5858ef393252304f6d1c429d9674e 100644 (file)
--- a/env/ext4.c
+++ b/env/ext4.c
@@ -30,6 +30,16 @@
 #include <ext4fs.h>
 #include <mmc.h>
 
+__weak const char *env_ext4_get_intf(void)
+{
+       return (const char *)CONFIG_ENV_EXT4_INTERFACE;
+}
+
+__weak const char *env_ext4_get_dev_part(void)
+{
+       return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
+}
+
 #ifdef CONFIG_CMD_SAVEENV
 static int env_ext4_save(void)
 {
@@ -38,13 +48,14 @@ static int env_ext4_save(void)
        disk_partition_t info;
        int dev, part;
        int err;
+       const char *ifname = env_ext4_get_intf();
+       const char *dev_and_part = env_ext4_get_dev_part();
 
        err = env_export(&env_new);
        if (err)
                return err;
 
-       part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
-                                      CONFIG_ENV_EXT4_DEVICE_AND_PART,
+       part = blk_get_device_part_str(ifname, dev_and_part,
                                       &dev_desc, &info, 1);
        if (part < 0)
                return 1;
@@ -54,8 +65,7 @@ static int env_ext4_save(void)
 
        if (!ext4fs_mount(info.size)) {
                printf("\n** Unable to use %s %s for saveenv **\n",
-                      CONFIG_ENV_EXT4_INTERFACE,
-                      CONFIG_ENV_EXT4_DEVICE_AND_PART);
+                      ifname, dev_and_part);
                return 1;
        }
 
@@ -65,8 +75,7 @@ static int env_ext4_save(void)
 
        if (err == -1) {
                printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
-                       CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
-                       part);
+                       CONFIG_ENV_EXT4_FILE, ifname, dev, part);
                return 1;
        }
 
@@ -83,14 +92,15 @@ static int env_ext4_load(void)
        int dev, part;
        int err;
        loff_t off;
+       const char *ifname = env_ext4_get_intf();
+       const char *dev_and_part = env_ext4_get_dev_part();
 
 #ifdef CONFIG_MMC
-       if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc"))
+       if (!strcmp(ifname, "mmc"))
                mmc_initialize(NULL);
 #endif
 
-       part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
-                                      CONFIG_ENV_EXT4_DEVICE_AND_PART,
+       part = blk_get_device_part_str(ifname, dev_and_part,
                                       &dev_desc, &info, 1);
        if (part < 0)
                goto err_env_relocate;
@@ -100,8 +110,7 @@ static int env_ext4_load(void)
 
        if (!ext4fs_mount(info.size)) {
                printf("\n** Unable to use %s %s for loading the env **\n",
-                      CONFIG_ENV_EXT4_INTERFACE,
-                      CONFIG_ENV_EXT4_DEVICE_AND_PART);
+                      ifname, dev_and_part);
                goto err_env_relocate;
        }
 
@@ -111,8 +120,7 @@ static int env_ext4_load(void)
 
        if (err == -1) {
                printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
-                       CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
-                       part);
+                       CONFIG_ENV_EXT4_FILE, ifname, dev, part);
                goto err_env_relocate;
        }