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mxc: add arch_reset() function

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This patch adds arch_reset() function for all mxc platforms.

It also removes (unsused) arch/arm/mach-mx2/system.c file.

This patch has been tested on i.MX1/27/31/35

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Ilya Yanok 2009-03-03 02:49:23 +03:00 committed by Sascha Hauer
parent 05fd8e73e1
commit 74bef9a4fa
4 changed files with 30 additions and 29 deletions
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2
arch/arm/mach-mx2/Makefile
View File

@ -4,7 +4,7 @@
# Object file lists.
obj-y := system.o generic.o devices.o serial.o
obj-y := generic.o devices.o serial.o
obj-$(CONFIG_MACH_MX21) += clock_imx21.o

2
arch/arm/plat-mxc/Makefile
View File

@ -3,7 +3,7 @@
#
# Common support
obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o
obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o system.o
obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o
obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o

5
arch/arm/plat-mxc/include/mach/system.h
View File

@ -26,9 +26,6 @@ static inline void arch_idle(void)
cpu_do_idle();
}
static inline void arch_reset(char mode, const char *cmd)
{
cpu_reset(0);
}
void arch_reset(char mode, const char *cmd);
#endif /* __ASM_ARCH_MXC_SYSTEM_H__ */

50
arch/arm/mach-mx2/system.c → arch/arm/plat-mxc/system.c
View File

@ -3,6 +3,7 @@
* Copyright (C) 2000 Deep Blue Solutions Ltd
* Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
* Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -22,42 +23,45 @@
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <mach/hardware.h>
#include <asm/proc-fns.h>
#include <asm/system.h>
/*
* Put the CPU into idle mode. It is called by default_idle()
* in process.c file.
*/
void arch_idle(void)
{
/*
* This should do all the clock switching
* and wait for interrupt tricks.
*/
cpu_do_idle();
}
#define WDOG_WCR_REG IO_ADDRESS(WDOG_BASE_ADDR)
#define WDOG_WCR_SRS (1 << 4)
#ifdef CONFIG_ARCH_MX1
#define WDOG_WCR_REG IO_ADDRESS(WDT_BASE_ADDR)
#define WDOG_WCR_ENABLE (1 << 0)
#else
#define WDOG_WCR_REG IO_ADDRESS(WDOG_BASE_ADDR)
#define WDOG_WCR_ENABLE (1 << 2)
#endif
/*
* Reset the system. It is called by machine_restart().
*/
void arch_reset(char mode, const char *cmd)
{
struct clk *clk;
if (!cpu_is_mx1()) {
struct clk *clk;
clk = clk_get(NULL, "wdog_clk");
if (!clk) {
printk(KERN_ERR"Cannot activate the watchdog. Giving up\n");
return;
clk = clk_get_sys("imx-wdt.0", NULL);
if (!IS_ERR(clk))
clk_enable(clk);
}
clk_enable(clk);
/* Assert SRS signal */
__raw_writew(__raw_readw(WDOG_WCR_REG) & ~WDOG_WCR_SRS, WDOG_WCR_REG);
__raw_writew(WDOG_WCR_ENABLE, WDOG_WCR_REG);
/* wait for reset to assert... */
mdelay(500);
printk(KERN_ERR "Watchdog reset failed to assert reset\n");
/* delay to allow the serial port to show the message */
mdelay(50);
/* we'll take a jump through zero as a poor second */
cpu_reset(0);
}