X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=cpu%2Fmcf52x2%2Fspeed.c;h=c93a5180eb5702f3e84928dc7ad07a6d60eca056;hb=2c75c78d94574ee996db2aa9b511258519471dd6;hp=ac860b2c673c31fce5c6e31631d0b7876ca241e9;hpb=197b049b8b8a488384f351b988dd15f78830ba4e;p=oweals%2Fu-boot.git

diff --git a/cpu/mcf52x2/speed.c b/cpu/mcf52x2/speed.c
index ac860b2c67..c93a5180eb 100644
--- a/cpu/mcf52x2/speed.c
+++ b/cpu/mcf52x2/speed.c
@@ -2,6 +2,9 @@
  * (C) Copyright 2003
  * Josef Baumgartner <josef.baumgartner@telex.de>
  *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * Hayden Fraser (Hayden.Fraser@freescale.com)
+ *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
@@ -23,6 +26,7 @@
 
 #include <common.h>
 #include <asm/processor.h>
+#include <asm/immap.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -31,11 +35,61 @@ DECLARE_GLOBAL_DATA_PTR;
  */
 int get_clocks (void)
 {
-	gd->cpu_clk = CFG_CLK;
+#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)
+	volatile pll_t *pll = (volatile pll_t *)(MMAP_PLL);
+
+	/* Setup PLL */
+	pll->syncr = 0x01080000;
+	while (!(pll->synsr & FMPLL_SYNSR_LOCK))
+		;
+	pll->syncr = 0x01000000;
+	while (!(pll->synsr & FMPLL_SYNSR_LOCK))
+		;
+#endif
+
+	gd->cpu_clk = CONFIG_SYS_CLK;
+#if 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->i2c1_clk = gd->bus_clk;
+#ifdef CONFIG_SYS_I2C2_OFFSET
+	gd->i2c2_clk = gd->bus_clk;
+#endif
+#endif
+
 	return (0);
 }