tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/***************************************************************************/
2
3/*
4 * 525x.c
5 *
6 * Copyright (C) 2012, Steven King <sfking@fdwdc.com>
7 */
8
9/***************************************************************************/
10
11#include <linux/kernel.h>
12#include <linux/param.h>
13#include <linux/init.h>
14#include <linux/io.h>
15#include <linux/platform_device.h>
16#include <asm/machdep.h>
17#include <asm/coldfire.h>
18#include <asm/mcfsim.h>
19
20/***************************************************************************/
21
22static void __init m525x_qspi_init(void)
23{
24#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
25 /* set the GPIO function for the qspi cs gpios */
26 /* FIXME: replace with pinmux/pinctl support */
27 u32 f = readl(MCFSIM2_GPIOFUNC);
28 f |= (1 << MCFQSPI_CS2) | (1 << MCFQSPI_CS1) | (1 << MCFQSPI_CS0);
29 writel(f, MCFSIM2_GPIOFUNC);
30
31 /* QSPI irq setup */
32 writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL4 | MCFSIM_ICR_PRI0,
33 MCFSIM_QSPIICR);
34 mcf_mapirq2imr(MCF_IRQ_QSPI, MCFINTC_QSPI);
35#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
36}
37
38static void __init m525x_i2c_init(void)
39{
40#if IS_ENABLED(CONFIG_I2C_COLDFIRE)
41 u32 r;
42
43 /* first I2C controller uses regular irq setup */
44 writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL5 | MCFSIM_ICR_PRI0,
45 MCFSIM_I2CICR);
46 mcf_mapirq2imr(MCF_IRQ_I2C0, MCFINTC_I2C);
47
48 /* second I2C controller is completely different */
49 r = readl(MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
50 r &= ~MCFINTC2_INTPRI_BITS(0xf, MCF_IRQ_I2C1);
51 r |= MCFINTC2_INTPRI_BITS(0x5, MCF_IRQ_I2C1);
52 writel(r, MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
53#endif /* IS_ENABLED(CONFIG_I2C_COLDFIRE) */
54}
55
56/***************************************************************************/
57
58void __init config_BSP(char *commandp, int size)
59{
60 mach_sched_init = hw_timer_init;
61
62 m525x_qspi_init();
63 m525x_i2c_init();
64}
65
66/***************************************************************************/