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When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
Summary
=======
This document covers various features of the 'am335x_shc' build.
Hardware
========
AM335X based board:
I2C: ready
DRAM: 512 MiB
Enabling the D-Cache
MMC: OMAP SD/MMC: 0 @ 26 MHz, OMAP SD/MMC: 1 @ 26 MHz
Net: cpsw
Following boot options are possible:
2 Jumpers:
Jumper 1 Jumper 2 Bootmode
off off eMMC boot
on off SD boot
off on Net boot
Compiling
=========
$ make am335x_shc_defconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
SHIPPED scripts/kconfig/zconf.tab.c
SHIPPED scripts/kconfig/zconf.lex.c
SHIPPED scripts/kconfig/zconf.hash.c
HOSTCC scripts/kconfig/zconf.tab.o
HOSTLD scripts/kconfig/conf
#
# configuration written to .config
#
$ make -s all
-> now you have the MLO and the u-boot.img file, you can put
on your SD card or eMMC.
Configuring
===========
There are a lot of board versions and boot configurations, which
can be selected through "make menuconfig"
ARM architecture --->
enable different boot versions for the shc board (enable eMMC) --->
(X) enable eMMC
( ) enable ICT
( ) enable NETBOOT
( ) enable SDBOOT
enable different board versions for the shc board (C3 Sample board version) --->
( ) B Sample board version
( ) B2 Sample board version
( ) C Sample board version
( ) C2 Sample board version
(X) C3 Sample board version
( ) Series board version
Netboot
=======
- see also doc/SPL/README.am335x-network
- set the jumper into netboot mode
- compile the U-boot sources with:
make am335x_shc_netboot_defconfig
make all
- copy the images into your tftp boot directory
cp spl/u-boot-spl.bin /tftpboot/.../u-boot-spl-restore.bin
cp u-boot.img /tftpboot/.../u-boot-restore.img
- power on the board, and you should get something like this:
U-Boot SPL 2016.05-rc2-00016-gf23b960-dirty (Apr 26 2016 - 09:02:18)
#### NETBOOT ####
SHC
MPU reference clock runs at 6 MHz
Setting MPU clock to 594 MHz
Enabling Spread Spectrum of 18 permille for MPU
Trying to boot from net
Using default environment
<ethaddr> not set. Validating first E-fuse MAC
cpsw
cpsw Waiting for PHY auto negotiation to complete... done
link up on port 0, speed 100, full duplex
BOOTP broadcast 1
BOOTP broadcast 2
DHCP client bound to address 192.168.20.91 (258 ms)
Using cpsw device
TFTP from server 192.168.1.1; our IP address is 192.168.20.91
Filename 'shc/u-boot-restore.img'.
Load address: 0x807fffc0
Loading: ##################
1.2 MiB/s
done
Bytes transferred = 262480 (40150 hex)
U-Boot 2016.05-rc2-00016-gf23b960-dirty (Apr 26 2016 - 09:02:18 +0200)
Watchdog enabled
I2C: ready
DRAM: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - bad CRC, using default environment
Net: cpsw
switch to partitions #0, OK