[U-Boot] [U-BOOT PATCH v1] set serial environment variable

[Sagar Shrikant Kadam]

This patch sets serial environment variable by reading the OTP memory
region of FU540-C000 SoC which is mounted on HiFive Unleashed A00 board.

The patch is based on master branch of[1]

[1] https://gitlab.denx.de/u-boot/custodians/u-boot-riscv

Following is the result:

U-Boot 2019.10-rc1-03748-gab38b00-dirty (Aug 11 2019 - 23:14:27 -0700)

CPU:   rv64imafdc
Model: SiFive HiFive Unleashed A00
DRAM:  8 GiB
MMC:   spi at 10050000:mmc at 0: 0
In:    serial at 10010000
Out:   serial at 10010000
Err:   serial at 10010000
Net:   eth0: ethernet at 10090000
Hit any key to stop autoboot:  0
=> env print serial#
serial#=000000d0

Change history against base patch:
V1:
-Reduced buf size by 2 bytes as suggested by Bin Meng.
-Used true as argument to WARN message instead of 1.
-Terminated the WARN message with newline.

Sagar Shrikant Kadam (1):
  riscv: sifive: fu540: set serial environment variable from otp

 board/sifive/fu540/fu540.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

-- 
2.7.4