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/arch/arm/include/asm/arch-tegra/gpio.h

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/*
* Copyright (c) 2011, Google Inc. All rights reserved.
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _TEGRA_GPIO_H_
#define _TEGRA_GPIO_H_
#define MAX_NUM_GPIOS (TEGRA_GPIO_PORTS * TEGRA_GPIO_BANKS * 8)
#define GPIO_NAME_SIZE 20 /* gpio_request max label len */
#define GPIO_BANK(x) ((x) >> 5)
#define GPIO_PORT(x) (((x) >> 3) & 0x3)
#define GPIO_FULLPORT(x) ((x) >> 3)
#define GPIO_BIT(x) ((x) & 0x7)
/*
* Tegra-specific GPIO API
*/
void gpio_info(void);
#define gpio_status() gpio_info()
#endif /* TEGRA_GPIO_H_ */