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