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
28 DEFINE_CLK(pll, "pll.0", MCF_CLK);
29 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
30
31 static 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
48 static 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
64 static 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
79 static 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
87 void __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
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