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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Josef Baumgartner <josef.baumgartner@telex.de>
*
* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
* Hayden Fraser (Hayden.Fraser@freescale.com)
*/
#include <common.h>
#include <clock_legacy.h>
#include <asm/global_data.h>
#include <asm/processor.h>
#include <asm/immap.h>
#include <asm/io.h>
#include <linux/delay.h>
DECLARE_GLOBAL_DATA_PTR;
/* get_clocks() fills in gd->cpu_clock and gd->bus_clk */
int get_clocks(void)
{
#if defined(CONFIG_M5208)
pll_t *pll = (pll_t *) MMAP_PLL;
out_8(&pll->odr, CONFIG_SYS_PLL_ODR);
out_8(&pll->fdr, CONFIG_SYS_PLL_FDR);
#endif
#if defined(CONFIG_M5249) || defined(CONFIG_M5253)
volatile unsigned long cpll = mbar2_readLong(MCFSIM_PLLCR);
unsigned long pllcr;
#ifndef CONFIG_SYS_PLL_BYPASS
#ifdef CONFIG_M5249
/* Setup the PLL to run at the specified speed */
#ifdef CONFIG_SYS_FAST_CLK
pllcr = 0x925a3100; /* ~140MHz clock (PLL bypass = 0) */
#else
pllcr = 0x135a4140; /* ~72MHz clock (PLL bypass = 0) */
#endif
#endif /* CONFIG_M5249 */
#ifdef CONFIG_M5253
pllcr = CONFIG_SYS_PLLCR;
#endif /* CONFIG_M5253 */
cpll = cpll & 0xfffffffe; /* Set PLL bypass mode = 0 (PSTCLK = crystal) */
mbar2_writeLong(MCFSIM_PLLCR, cpll); /* Set the PLL to bypass mode (PSTCLK = crystal) */
mbar2_writeLong(MCFSIM_PLLCR, pllcr); /* set the clock speed */
pllcr ^= 0x00000001; /* Set pll bypass to 1 */
mbar2_writeLong(MCFSIM_PLLCR, pllcr); /* Start locking (pll bypass = 1) */
udelay(0x20); /* Wait for a lock ... */
#endif /* #ifndef CONFIG_SYS_PLL_BYPASS */
#endif /* CONFIG_M5249 || CONFIG_M5253 */
#if defined(CONFIG_M5275)
pll_t *pll = (pll_t *)(MMAP_PLL);
/* Setup PLL */
out_be32(&pll->syncr, 0x01080000);
while (!(in_be32(&pll->synsr) & FMPLL_SYNSR_LOCK))
;
out_be32(&pll->syncr, 0x01000000);
while (!(in_be32(&pll->synsr) & FMPLL_SYNSR_LOCK))
;
#endif
gd->cpu_clk = CONFIG_SYS_CLK;
#if defined(CONFIG_M5208) || defined(CONFIG_M5249) || defined(CONFIG_M5253) || \
defined(CONFIG_M5271) || defined(CONFIG_M5275)
gd->bus_clk = gd->cpu_clk / 2;
#else
gd->bus_clk = gd->cpu_clk;
#endif
#ifdef CONFIG_SYS_I2C_FSL
gd->arch.i2c1_clk = gd->bus_clk;
#ifdef CONFIG_SYS_I2C2_FSL_OFFSET
gd->arch.i2c2_clk = gd->bus_clk;
#endif
#endif
return (0);
}
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