From: Ruslan Trofymenko <ruslan.trofyme...@linaro.org>

This sub-command serves for getting the partition index from
partition name. Also it can be used to test the existence of specified
partition.

Signed-off-by: Ruslan Trofymenko <ruslan.trofyme...@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opan...@linaro.org>
Reviewed-by: Alistair Strachan <astrac...@google.com>
Reviewed-by: Sam Protsenko <semen.protse...@linaro.org>
Reviewed-by: Simon Glass <s...@chromium.org>
---

Changes in v3: None
Changes in v2: None

 cmd/part.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/cmd/part.c b/cmd/part.c
index bfb6488..653e13c 100644
--- a/cmd/part.c
+++ b/cmd/part.c
@@ -24,6 +24,7 @@
 enum cmd_part_info {
        CMD_PART_INFO_START = 0,
        CMD_PART_INFO_SIZE,
+       CMD_PART_INFO_NUMBER
 };
 
 static int do_part_uuid(int argc, char * const argv[])
@@ -149,6 +150,9 @@ static int do_part_info(int argc, char * const argv[], enum 
cmd_part_info param)
        case CMD_PART_INFO_SIZE:
                snprintf(buf, sizeof(buf), LBAF, info.size);
                break;
+       case CMD_PART_INFO_NUMBER:
+               snprintf(buf, sizeof(buf), "%d", part);
+               break;
        default:
                printf("** Unknown cmd_part_info value: %d\n", param);
                return 1;
@@ -172,6 +176,11 @@ static int do_part_size(int argc, char * const argv[])
        return do_part_info(argc, argv, CMD_PART_INFO_SIZE);
 }
 
+static int do_part_number(int argc, char * const argv[])
+{
+       return do_part_info(argc, argv, CMD_PART_INFO_NUMBER);
+}
+
 static int do_part(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
        if (argc < 2)
@@ -185,6 +194,8 @@ static int do_part(cmd_tbl_t *cmdtp, int flag, int argc, 
char * const argv[])
                return do_part_start(argc - 2, argv + 2);
        else if (!strcmp(argv[1], "size"))
                return do_part_size(argc - 2, argv + 2);
+       else if (!strcmp(argv[1], "number"))
+               return do_part_number(argc - 2, argv + 2);
 
        return CMD_RET_USAGE;
 }
@@ -206,5 +217,8 @@ U_BOOT_CMD(
        "      part can be either partition number or partition name\n"
        "part size <interface> <dev> <part> <varname>\n"
        "    - set environment variable to the size of the partition (in 
blocks)\n"
-       "      part can be either partition number or partition name"
+       "      part can be either partition number or partition name\n"
+       "part number <interface> <dev> <part> <varname>\n"
+       "    - set environment variable to the partition number using the 
partition name\n"
+       "      part must be specified as partition name"
 );
-- 
2.7.4

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