usb: ums: wait for usb cable connection before enter ums mode

[karo-tx-uboot.git] / common / cmd_nvedit.c

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 2478c95b73604b9628b0df1678734dd70b776920..5bcc324675eb7535c9e103cd473134122b83e376 100644 (file)
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -7,23 +7,7 @@
  *
  * Copyright 2011 Freescale Semiconductor, Inc.
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.         See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 /*
@@ -173,10 +157,8 @@ static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
        grep_how  = H_MATCH_SUBSTR;     /* default: substring search    */
        grep_what = H_MATCH_BOTH;       /* default: grep names and values */
 
-       while (argc > 1 && **(argv + 1) == '-') {
-               char *arg = *++argv;
-
-               --argc;
+       while (--argc > 0 && **++argv == '-') {
+               char *arg = *argv;
                while (*++arg) {
                        switch (*arg) {
 #ifdef CONFIG_REGEX
@@ -1075,6 +1057,23 @@ sep_err:
 }
 #endif
 
+#if defined(CONFIG_CMD_ENV_EXISTS)
+static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
+                      char * const argv[])
+{
+       ENTRY e, *ep;
+
+       if (argc < 2)
+               return CMD_RET_USAGE;
+
+       e.key = argv[1];
+       e.data = NULL;
+       hsearch_r(e, FIND, &ep, &env_htab, 0);
+
+       return (ep == NULL) ? 1 : 0;
+}
+#endif
+
 /*
  * New command line interface: "env" command with subcommands
  */
@@ -1110,6 +1109,9 @@ static cmd_tbl_t cmd_env_sub[] = {
        U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
 #endif
        U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
+#if defined(CONFIG_CMD_ENV_EXISTS)
+       U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
+#endif
 };
 
 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
@@ -1152,6 +1154,9 @@ static char env_help_text[] =
 #if defined(CONFIG_CMD_EDITENV)
        "env edit name - edit environment variable\n"
 #endif
+#if defined(CONFIG_CMD_ENV_EXISTS)
+       "env exists name - tests for existence of variable\n"
+#endif
 #if defined(CONFIG_CMD_EXPORTENV)
        "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
 #endif