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@10050000:mmc@0: 0 In: serial@10010000 Out: serial@10010000 Err: serial@10010000 Net: eth0: ethernet@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(-)