mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 10:48:51 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/*
|
|
* (C) Copyright 2003
|
|
* Josef Baumgartner <josef.baumgartner@telex.de>
|
|
*
|
|
* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
|
|
* Hayden Fraser (Hayden.Fraser@freescale.com)
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/immap.h>
|
|
#include <asm/io.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_FSL_I2C
|
|
gd->arch.i2c1_clk = gd->bus_clk;
|
|
#ifdef CONFIG_SYS_I2C2_OFFSET
|
|
gd->arch.i2c2_clk = gd->bus_clk;
|
|
#endif
|
|
#endif
|
|
|
|
return (0);
|
|
}
|