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(MCFGPIO_PAR_FECI2C);
72	par |= 0x0f;
73	writeb(par, 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(MCFGPIO_PAR_FECI2C) | 0xf0, 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