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-bcm2835/gpio.h

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/*
* Copyright (C) 2012 Vikram Narayananan
* <vikram186@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _BCM2835_GPIO_H_
#define _BCM2835_GPIO_H_
#define BCM2835_GPIO_BASE 0x20200000
#define BCM2835_GPIO_COUNT 54
#define BCM2835_GPIO_FSEL_MASK 0x7
#define BCM2835_GPIO_INPUT 0x0
#define BCM2835_GPIO_OUTPUT 0x1
#define BCM2835_GPIO_ALT0 0x4
#define BCM2835_GPIO_ALT1 0x5
#define BCM2835_GPIO_ALT2 0x6
#define BCM2835_GPIO_ALT3 0x7
#define BCM2835_GPIO_ALT4 0x3
#define BCM2835_GPIO_ALT5 0x2
#define BCM2835_GPIO_COMMON_BANK(gpio) ((gpio < 32) ? 0 : 1)
#define BCM2835_GPIO_COMMON_SHIFT(gpio) (gpio & 0x1f)
#define BCM2835_GPIO_FSEL_BANK(gpio) (gpio / 10)
#define BCM2835_GPIO_FSEL_SHIFT(gpio) ((gpio % 10) * 3)
struct bcm2835_gpio_regs {
u32 gpfsel[6];
u32 reserved1;
u32 gpset[2];
u32 reserved2;
u32 gpclr[2];
u32 reserved3;
u32 gplev[2];
u32 reserved4;
u32 gpeds[2];
u32 reserved5;
u32 gpren[2];
u32 reserved6;
u32 gpfen[2];
u32 reserved7;
u32 gphen[2];
u32 reserved8;
u32 gplen[2];
u32 reserved9;
u32 gparen[2];
u32 reserved10;
u32 gppud;
u32 gppudclk[2];
};
#endif /* _BCM2835_GPIO_H_ */