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/calao/tny_a9260/spi.c

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/*
* Copyright (C) 2009
* Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_spi.h>
#include <asm/arch/gpio.h>
#include <spi.h>
#define TNY_A9260_CS_PIN AT91_PIN_PC11
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
return bus == 0 && cs == 1;
}
void spi_cs_activate(struct spi_slave *slave)
{
at91_set_gpio_value(TNY_A9260_CS_PIN, 0);
}
void spi_cs_deactivate(struct spi_slave *slave)
{
at91_set_gpio_value(TNY_A9260_CS_PIN, 1);
}
void spi_init_f(void)
{
/* everything done in board_init */
}