[PATCH v5 5/5] starfive: add mac vendor sub-command

[Heinrich Schuchardt]

As boards from multiple vendors (Milk-V, StarFive, Pine64) use the mac
command provide a sub-command to set the vendor string.

Reported-by: E. Shattow <luc...@gmail.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com>
---
v5:
        use strncpy to avoid failures if vendor string contains printf
        codes (e.g. '%d')
v4:
        no change
v3:
        new patch
---
 .../visionfive2/visionfive2-i2c-eeprom.c      | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c 
b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
index 9648a270494..d6e7676bff1 100644
--- a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
+++ b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
@@ -404,6 +404,24 @@ static void set_product_id(char *string)
        update_crc();
 }
 
+/**
+ * set_vendor() - set vendor name
+ *
+ * Takes a pointer to a string representing the vendor name, e.g.
+ * "StarFive Technology Co., Ltd.", stores it in the vendor field
+ * of the EEPROM local copy, and updates the CRC of the local copy.
+ */
+static void set_vendor(char *string)
+{
+       memset(pbuf.eeprom.atom1.data.vstr, 0,
+              sizeof(pbuf.eeprom.atom1.data.vstr));
+
+       strncpy(pbuf.eeprom.atom1.data.vstr,
+               string, sizeof(pbuf.eeprom.atom1.data.vstr) - 1);
+
+       update_crc();
+}
+
 const char *get_product_id_from_eeprom(void)
 {
        if (read_eeprom())
@@ -463,6 +481,9 @@ int do_mac(struct cmd_tbl *cmdtp, int flag, int argc, char 
*const argv[])
        } else if (!strcmp(cmd, "product_id")) {
                set_product_id(argv[2]);
                return 0;
+       } else if (!strcmp(cmd, "vendor")) {
+               set_vendor(argv[2]);
+               return 0;
        }
 
        return CMD_RET_USAGE;
@@ -586,7 +607,9 @@ U_BOOT_LONGHELP(mac,
        "mac bom_revision <A>\n"
        "    - stores a StarFive BOM revision into the local EEPROM copy\n"
        "mac product_id <VF7110A1-2228-D008E000-xxxxxxxx>\n"
-       "    - stores a StarFive product ID into the local EEPROM copy\n");
+       "    - stores a StarFive product ID into the local EEPROM copy\n"
+       "mac vendor <Vendor Name>\n"
+       "    - set vendor string\n");
 
 U_BOOT_CMD(
        mac, 3, 1,  do_mac,
-- 
2.43.0