1// SPDX-License-Identifier: GPL-2.0
2/***************************************************************************/
3
4/*
5 * m523x.c -- platform support for ColdFire 523x based boards
6 *
7 * Sub-architcture dependent initialization code for the Freescale
8 * 523x CPUs.
9 *
10 * Copyright (C) 1999-2005, Greg Ungerer (gerg@snapgear.com)
11 * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
12 */
13
14/***************************************************************************/
15
16#include <linux/clkdev.h>
17#include <linux/kernel.h>
18#include <linux/param.h>
19#include <linux/init.h>
20#include <linux/io.h>
21#include <asm/machdep.h>
22#include <asm/coldfire.h>
23#include <asm/mcfsim.h>
24#include <asm/mcfclk.h>
25
26/***************************************************************************/
27
28DEFINE_CLK(pll, "pll.0", MCF_CLK);
29DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
30
31static struct clk_lookup m523x_clk_lookup[] = {
32 CLKDEV_INIT(NULL, "pll.0", &clk_pll),
33 CLKDEV_INIT(NULL, "sys.0", &clk_sys),
34 CLKDEV_INIT("mcfpit.0", NULL, &clk_pll),
35 CLKDEV_INIT("mcfpit.1", NULL, &clk_pll),
36 CLKDEV_INIT("mcfpit.2", NULL, &clk_pll),
37 CLKDEV_INIT("mcfpit.3", NULL, &clk_pll),
38 CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
39 CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
40 CLKDEV_INIT("mcfuart.2", NULL, &clk_sys),
41 CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
42 CLKDEV_INIT("fec.0", NULL, &clk_sys),
43 CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),
44};
45
46/***************************************************************************/
47
48static void __init m523x_qspi_init(void)
49{
50#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
51 u16 par;
52
53 /* setup QSPS pins for QSPI with gpio CS control */
54 writeb(0x1f, MCFGPIO_PAR_QSPI);
55 /* and CS2 & CS3 as gpio */
56 par = readw(MCFGPIO_PAR_TIMER);
57 par &= 0x3f3f;
58 writew(par, MCFGPIO_PAR_TIMER);
59#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
60}
61
62/***************************************************************************/
63
64static void __init m523x_i2c_init(void)
65{
66#if IS_ENABLED(CONFIG_I2C_IMX)
67 u8 par;
68
69 /* setup Port AS Pin Assignment Register for I2C */
70 /* set PASPA0 to SCL and PASPA1 to SDA */
71 par = readb(addr: MCFGPIO_PAR_FECI2C);
72 par |= 0x0f;
73 writeb(val: par, addr: MCFGPIO_PAR_FECI2C);
74#endif /* IS_ENABLED(CONFIG_I2C_IMX) */
75}
76
77/***************************************************************************/
78
79static void __init m523x_fec_init(void)
80{
81 /* Set multi-function pins to ethernet use */
82 writeb(readb(addr: MCFGPIO_PAR_FECI2C) | 0xf0, addr: MCFGPIO_PAR_FECI2C);
83}
84
85/***************************************************************************/
86
87void __init config_BSP(char *commandp, int size)
88{
89 mach_sched_init = hw_timer_init;
90 m523x_fec_init();
91 m523x_qspi_init();
92 m523x_i2c_init();
93
94 clkdev_add_table(m523x_clk_lookup, ARRAY_SIZE(m523x_clk_lookup));
95}
96
97/***************************************************************************/
98

source code of linux/arch/m68k/coldfire/m523x.c