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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
// SPDX-FileCopyrightText: 2006 Dominic Rath <Dominic.Rath@gmx.de>
/* PLL setup for Cirrus edb93xx boards */
#include <common.h>
#include <io.h>
#include "pll_cfg.h"
#include "early_udelay.h"
void pll_cfg(void)
{
struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
/* setup PLL1 */
writel(CLKSET1_VAL, &syscon->clkset1);
/*
* flush the pipeline
* writing to CLKSET1 causes the EP93xx to enter standby for between
* 8 ms to 16 ms, until PLL1 stabilizes
*/
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
/* setup PLL2 */
writel(CLKSET2_VAL, &syscon->clkset2);
/*
* the user's guide recommends to wait at least 1 ms for PLL2 to
* stabilize
*/
early_udelay(1000);
}
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