From: Priit Laes priit.laes@paf.com

Add u-boot specific getvar "extension" to fetch u-boot environment variables via `fastboot getvar uboot:var`. This makes it possible to gather certain data (like mac addresses) in an automated way during initial fastboot flashing for inventory purposes:

$ fastboot getvar uboot:ethaddr uboot:ethaddr: 12:23:45:56:78:90

Output is currently truncated at 64 bytes, but this is good enough for my own requirements.

Signed-off-by: Priit Laes priit.laes@paf.com --- drivers/fastboot/fb_getvar.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)

diff --git a/drivers/fastboot/fb_getvar.c b/drivers/fastboot/fb_getvar.c index 4d264c985d..37bb8c7220 100644 --- a/drivers/fastboot/fb_getvar.c +++ b/drivers/fastboot/fb_getvar.c @@ -20,6 +20,7 @@ static void getvar_product(char *var_parameter, char *response); static void getvar_current_slot(char *var_parameter, char *response); static void getvar_slot_suffixes(char *var_parameter, char *response); static void getvar_has_slot(char *var_parameter, char *response); +static void getvar_ubootenv(char *var_parameter, char *response); #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC) static void getvar_partition_type(char *part_name, char *response); #endif @@ -64,6 +65,9 @@ static const struct { }, { .variable = "has_slot", .dispatch = getvar_has_slot + }, { + .variable = "uboot", + .dispatch = getvar_ubootenv #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC) }, { .variable = "partition-type", @@ -82,6 +86,16 @@ static void getvar_version(char *var_parameter, char *response) fastboot_okay(FASTBOOT_VERSION, response); }

+static void getvar_ubootenv(char *var_parameter, char *response) +{ + const char *value = env_get(var_parameter); + + if (value) + fastboot_okay(value, response); + else + fastboot_fail("Variable is not set", response); +} + static void getvar_bootloader_version(char *var_parameter, char *response) { fastboot_okay(U_BOOT_VERSION, response);