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/mini-box/picosam9g45/led.c

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/*
* (C) Copyright 2007-2008
* Stelian Pop <stelian@popies.net>
* Lead Tech Design <www.leadtechdesign.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/at91sam9g45.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/gpio.h>
void coloured_LED_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
/* Enable clock */
writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
at91_set_gpio_output(CONFIG_GREEN_LED, 1);
at91_set_gpio_value(CONFIG_GREEN_LED, 1);
}