summaryrefslogtreecommitdiff
path: root/arch/m68k/platform/coldfire/m525x.c
blob: 1adba3909035170b6f57be9a7d5b4589ae83f099 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
/***************************************************************************/

/*
 *	525x.c
 *
 *	Copyright (C) 2012, Steven King <sfking@fdwdc.com>
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfclk.h>

/***************************************************************************/

DEFINE_CLK(pll, "pll.0", MCF_CLK);
DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
DEFINE_CLK(mcftmr0, "mcftmr.0", MCF_BUSCLK);
DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK);
DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);

struct clk *mcf_clks[] = {
	&clk_pll,
	&clk_sys,
	&clk_mcftmr0,
	&clk_mcftmr1,
	&clk_mcfuart0,
	&clk_mcfuart1,
	&clk_mcfqspi0,
	NULL
};

/***************************************************************************/

static void __init m525x_qspi_init(void)
{
#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
	/* set the GPIO function for the qspi cs gpios */
	/* FIXME: replace with pinmux/pinctl support */
	u32 f = readl(MCFSIM2_GPIOFUNC);
	f |= (1 << MCFQSPI_CS2) | (1 << MCFQSPI_CS1) | (1 << MCFQSPI_CS0);
	writel(f, MCFSIM2_GPIOFUNC);

	/* QSPI irq setup */
	writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL4 | MCFSIM_ICR_PRI0,
	       MCFSIM_QSPIICR);
	mcf_mapirq2imr(MCF_IRQ_QSPI, MCFINTC_QSPI);
#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
}

static void __init m525x_i2c_init(void)
{
#if IS_ENABLED(CONFIG_I2C_COLDFIRE)
	u32 r;

	/* first I2C controller uses regular irq setup */
	writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL5 | MCFSIM_ICR_PRI0,
		MCFSIM_I2CICR);
	mcf_mapirq2imr(MCF_IRQ_I2C0, MCFINTC_I2C);

	/* second I2C controller is completely different */
	r = readl(MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
	r &= ~MCFINTC2_INTPRI_BITS(0xf, MCF_IRQ_I2C1);
	r |= MCFINTC2_INTPRI_BITS(0x5, MCF_IRQ_I2C1);
	writel(r, MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
#endif /* IS_ENABLED(CONFIG_I2C_COLDFIRE) */
}

/***************************************************************************/

void __init config_BSP(char *commandp, int size)
{
	mach_sched_init = hw_timer_init;

	m525x_qspi_init();
	m525x_i2c_init();
}

/***************************************************************************/