From 74bef9a4fa978669b234c4454daa596c0494c09a Mon Sep 17 00:00:00 2001 From: Ilya Yanok Date: Tue, 3 Mar 2009 02:49:23 +0300 Subject: [PATCH] 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 Signed-off-by: Sascha Hauer --- arch/arm/mach-mx2/Makefile | 2 +- arch/arm/plat-mxc/Makefile | 2 +- arch/arm/plat-mxc/include/mach/system.h | 5 +-- arch/arm/{mach-mx2 => plat-mxc}/system.c | 50 +++++++++++++----------- 4 files changed, 30 insertions(+), 29 deletions(-) rename arch/arm/{mach-mx2 => plat-mxc}/system.c (62%) diff --git a/arch/arm/mach-mx2/Makefile b/arch/arm/mach-mx2/Makefile index 6e1a2bffc812..950649a91540 100644 --- a/arch/arm/mach-mx2/Makefile +++ b/arch/arm/mach-mx2/Makefile @@ -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-$(CONFIG_MACH_MX21) += clock_imx21.o diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index 564fd4ebf38a..055406312b69 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -3,7 +3,7 @@ # # Common support -obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o +obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o system.o obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o diff --git a/arch/arm/plat-mxc/include/mach/system.h b/arch/arm/plat-mxc/include/mach/system.h index cd03ebaa49bc..e56241af870e 100644 --- a/arch/arm/plat-mxc/include/mach/system.h +++ b/arch/arm/plat-mxc/include/mach/system.h @@ -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__ */ diff --git a/arch/arm/mach-mx2/system.c b/arch/arm/plat-mxc/system.c similarity index 62% rename from arch/arm/mach-mx2/system.c rename to arch/arm/plat-mxc/system.c index 92c79d4bd162..79c37577c916 100644 --- a/arch/arm/mach-mx2/system.c +++ b/arch/arm/plat-mxc/system.c @@ -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 #include #include +#include +#include #include #include #include -/* - * 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); } -- 2.39.2