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-s5pc1xx/clk.h

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/*
* (C) Copyright 2009 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.com>
* Heungjun Kim <riverful.kim@samsung.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#ifndef __ASM_ARM_ARCH_CLK_H_
#define __ASM_ARM_ARCH_CLK_H_
#define APLL 0
#define MPLL 1
#define EPLL 2
#define HPLL 3
#define VPLL 4
unsigned long get_pll_clk(int pllreg);
unsigned long get_arm_clk(void);
unsigned long get_pwm_clk(void);
unsigned long get_uart_clk(int dev_index);
void set_mmc_clk(int dev_index, unsigned int div);
#endif