1 // SPDX-License-Identifier: GPL-2.0+
4 * Josef Baumgartner <josef.baumgartner@telex.de>
6 * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
7 * Hayden Fraser (Hayden.Fraser@freescale.com)
11 #include <clock_legacy.h>
12 #include <asm/global_data.h>
13 #include <asm/processor.h>
14 #include <asm/immap.h>
16 #include <linux/delay.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 /* get_clocks() fills in gd->cpu_clock and gd->bus_clk */
23 #if defined(CONFIG_M5208)
24 pll_t *pll = (pll_t *) MMAP_PLL;
26 out_8(&pll->odr, CFG_SYS_PLL_ODR);
27 out_8(&pll->fdr, CFG_SYS_PLL_FDR);
30 #if defined(CONFIG_M5249) || defined(CONFIG_M5253)
31 volatile unsigned long cpll = mbar2_readLong(MCFSIM_PLLCR);
34 #ifndef CFG_SYS_PLL_BYPASS
37 /* Setup the PLL to run at the specified speed */
38 #ifdef CFG_SYS_FAST_CLK
39 pllcr = 0x925a3100; /* ~140MHz clock (PLL bypass = 0) */
41 pllcr = 0x135a4140; /* ~72MHz clock (PLL bypass = 0) */
43 #endif /* CONFIG_M5249 */
46 pllcr = CFG_SYS_PLLCR;
47 #endif /* CONFIG_M5253 */
49 cpll = cpll & 0xfffffffe; /* Set PLL bypass mode = 0 (PSTCLK = crystal) */
50 mbar2_writeLong(MCFSIM_PLLCR, cpll); /* Set the PLL to bypass mode (PSTCLK = crystal) */
51 mbar2_writeLong(MCFSIM_PLLCR, pllcr); /* set the clock speed */
52 pllcr ^= 0x00000001; /* Set pll bypass to 1 */
53 mbar2_writeLong(MCFSIM_PLLCR, pllcr); /* Start locking (pll bypass = 1) */
54 udelay(0x20); /* Wait for a lock ... */
55 #endif /* #ifndef CFG_SYS_PLL_BYPASS */
57 #endif /* CONFIG_M5249 || CONFIG_M5253 */
59 #if defined(CONFIG_M5275)
60 pll_t *pll = (pll_t *)(MMAP_PLL);
63 out_be32(&pll->syncr, 0x01080000);
64 while (!(in_be32(&pll->synsr) & FMPLL_SYNSR_LOCK))
66 out_be32(&pll->syncr, 0x01000000);
67 while (!(in_be32(&pll->synsr) & FMPLL_SYNSR_LOCK))
71 gd->cpu_clk = CFG_SYS_CLK;
72 #if defined(CONFIG_M5208) || defined(CONFIG_M5249) || defined(CONFIG_M5253) || \
73 defined(CONFIG_M5271) || defined(CONFIG_M5275)
74 gd->bus_clk = gd->cpu_clk / 2;
76 gd->bus_clk = gd->cpu_clk;
79 #ifdef CONFIG_SYS_I2C_FSL
80 gd->arch.i2c1_clk = gd->bus_clk;
81 #ifdef CONFIG_SYS_I2C2_FSL_OFFSET
82 gd->arch.i2c2_clk = gd->bus_clk;