mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
mxc: add arch_reset() function
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:
parent
05fd8e73e1
commit
74bef9a4fa
4 changed files with 30 additions and 29 deletions
|
@ -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-$(CONFIG_MACH_MX21) += clock_imx21.o
|
||||
|
||||
|
|
|
@ -3,7 +3,7 @@
|
|||
#
|
||||
|
||||
# Common support
|
||||
obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o
|
||||
obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o system.o
|
||||
|
||||
obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o
|
||||
obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o
|
||||
|
|
|
@ -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__ */
|
||||
|
|
|
@ -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);
|
||||
}
|
Loading…
Reference in a new issue