cmd: env: add env load command

Add the new command env load to load the environment from
the current location gd->env_load_prio.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

diff --git a/cmd/Kconfig b/cmd/Kconfig
index bea2ddf..498fd31 100644 (file)
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -604,6 +604,12 @@ config CMD_NVEDIT_INFO
          [-q] : quiet output
          The result of multiple evaluations will be combined with AND.
 
+config CMD_NVEDIT_LOAD
+       bool "env load"
+       help
+         Load all environment variables from the compiled-in persistent
+         storage.
+
 endmenu
 
 menu "Memory commands"

diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index acd9f82..f730e2e 100644 (file)
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -794,6 +794,14 @@ U_BOOT_CMD(
 );
 #endif
 #endif
+
+#if defined(CONFIG_CMD_NVEDIT_LOAD)
+static int do_env_load(struct cmd_tbl *cmdtp, int flag, int argc,
+                      char *const argv[])
+{
+       return env_reload() ? 1 : 0;
+}
+#endif
 #endif /* CONFIG_SPL_BUILD */
 
 int env_match(uchar *s1, int i2)
@@ -1347,6 +1355,9 @@ static struct cmd_tbl cmd_env_sub[] = {
 #if defined(CONFIG_CMD_NVEDIT_INFO)
        U_BOOT_CMD_MKENT(info, 3, 0, do_env_info, "", ""),
 #endif
+#if defined(CONFIG_CMD_NVEDIT_LOAD)
+       U_BOOT_CMD_MKENT(load, 1, 0, do_env_load, "", ""),
+#endif
        U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
 #if defined(CONFIG_CMD_RUN)
        U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
@@ -1442,6 +1453,9 @@ static char env_help_text[] =
        "env erase - erase environment\n"
 #endif
 #endif
+#if defined(CONFIG_CMD_NVEDIT_LOAD)
+       "env load - load environment\n"
+#endif
 #if defined(CONFIG_CMD_NVEDIT_EFI)
        "env set -e [-nv][-bs][-rt][-at][-a][-i addr,size][-v] name [arg ...]\n"
        "    - set UEFI variable; unset if '-i' or 'arg' not specified\n"

diff --git a/env/env.c b/env/env.c
index 5cf5bd2..785a2b8 100644 (file)
--- a/env/env.c
+++ b/env/env.c
@@ -230,6 +230,34 @@ int env_load(void)
        return -ENODEV;
 }
 
+int env_reload(void)
+{
+       struct env_driver *drv;
+
+       drv = env_driver_lookup(ENVOP_LOAD, gd->env_load_prio);
+       if (drv) {
+               int ret;
+
+               printf("Loading Environment from %s... ", drv->name);
+
+               if (!env_has_inited(drv->location)) {
+                       printf("not initialized\n");
+                       return -ENODEV;
+               }
+
+               ret = drv->load();
+               if (ret)
+                       printf("Failed (%d)\n", ret);
+               else
+                       printf("OK\n");
+
+               if (!ret)
+                       return 0;
+       }
+
+       return -ENODEV;
+}
+
 int env_save(void)
 {
        struct env_driver *drv;

diff --git a/include/env.h b/include/env.h
index d6c2d75..68e0f4f 100644 (file)
--- a/include/env.h
+++ b/include/env.h
@@ -266,6 +266,13 @@ int env_set_default_vars(int nvars, char *const vars[], int flags);
 int env_load(void);
 
 /**
+ * env_reload() - Re-Load the environment from current storage
+ *
+ * @return 0 if OK, -ve on error
+ */
+int env_reload(void);
+
+/**
  * env_save() - Save the environment to storage
  *
  * @return 0 if OK, -ve on error