upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/board/bct-brettl2/cled.c

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/*
* cled.c - control color led
*
* Copyright (c) 2010 BCT Electronic GmbH
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <command.h>
#include <asm/blackfin.h>
#include <asm/io.h>
int do_cled(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
ulong addr = 0x20000000 + 0x200000; // AMS2
uchar data;
if (argc < 2)
return cmd_usage(cmdtp);
data = simple_strtoul(argv[1], NULL, 10);
outb(data, addr);
printf("cled, write %02x\n", data);
return 0;
}
U_BOOT_CMD(cled, 2, 0, do_cled,
"set/clear color LED",
"");