diff options
| author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2018-03-26 15:27:34 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2018-04-15 11:44:13 +0200 |
| commit | 852cc548b3fdf6d5b46e2a96f876d14608ccdcf4 (patch) | |
| tree | a21ec8af3f241ebcda1c1db7277e8bcca7f0bbae /include/configs/warp7.h | |
| parent | 1ab1ffded4f1363080324d96a12fd76c90175be2 (diff) | |
warp7: Set u-boot serial# based on OTP value
u-boot has a standard "serial#" environment variable that is suitable
for storing the iSerial number we will supply via the USB device
descriptor. serial# is automatically picked up by the disk subsystem in
u-boot - thus providing a handy unique identifier in /dev/disk/by-id as
detailed below.
Storing the hardware serial identifier in serial# means we can change the
serial# if we want before USB enumeration - thus making iSerial automatic
via OTP but overridable if necessary.
This patch reads the defined OTP fuse and sets environment variable
"serial#" to the value read.
With this patch in place the USB mass storage device will appear in
/dev/disk/by-id with a unique name based on the OTP value. For example
/dev/disk/by-id/usb-Linux_UMS_disk_0_WaRP7-0xf42400d3000001d4-0:0
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rui Miguel Silva <rui.silva@linaro.org>
Cc: Ryan Harkin <ryan.harkin@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Diffstat (limited to 'include/configs/warp7.h')
| -rw-r--r-- | include/configs/warp7.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/configs/warp7.h b/include/configs/warp7.h index fe96988be7..0c3b605de3 100644 --- a/include/configs/warp7.h +++ b/include/configs/warp7.h @@ -24,6 +24,9 @@ #define CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE #define CONFIG_SYS_MMC_IMG_LOAD_PART 1 +/* Switch on SERIAL_TAG */ +#define CONFIG_SERIAL_TAG + #define CONFIG_DFU_ENV_SETTINGS \ "dfu_alt_info=boot raw 0x2 0x400 mmcpart 1\0" \ |