[deliverable/linux.git] / arch / arm / mach-omap2 / ti81xx-restart.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/reboot.h>

#include "iomap.h"
#include "common.h"
#include "control.h"
#include "prm3xxx.h"

#define TI81XX_PRM_DEVICE_RSTCTRL	0x00a0
#define TI81XX_GLOBAL_RST_COLD		BIT(1)

/**
 * ti81xx_restart - trigger a software restart of the SoC
 * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
 * @cmd: passed from the userspace program rebooting the system (if provided)
 *
 * Resets the SoC.  For @cmd, see the 'reboot' syscall in
 * kernel/sys.c.  No return value.
 *
 * NOTE: Warm reset does not seem to work, may require resetting
 * clocks to bypass mode.
 */
void ti81xx_restart(enum reboot_mode mode, const char *cmd)
{
	omap2_prm_set_mod_reg_bits(TI81XX_GLOBAL_RST_COLD, 0,
				   TI81XX_PRM_DEVICE_RSTCTRL);
	while (1);
}
Commit	Line	Data
bc7235c9 TL	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License version 2 as
	4	* published by the Free Software Foundation.
	5	*/
	6	#include <linux/kernel.h>
	7	#include <linux/init.h>
	8	#include <linux/reboot.h>
	9
	10	#include "iomap.h"
	11	#include "common.h"
	12	#include "control.h"
	13	#include "prm3xxx.h"
	14
	15	#define TI81XX_PRM_DEVICE_RSTCTRL 0x00a0
	16	#define TI81XX_GLOBAL_RST_COLD BIT(1)
	17
	18	/**
	19	* ti81xx_restart - trigger a software restart of the SoC
	20	* @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
	21	* @cmd: passed from the userspace program rebooting the system (if provided)
	22	*
	23	* Resets the SoC. For @cmd, see the 'reboot' syscall in
	24	* kernel/sys.c. No return value.
	25	*
	26	* NOTE: Warm reset does not seem to work, may require resetting
	27	* clocks to bypass mode.
	28	*/
	29	void ti81xx_restart(enum reboot_mode mode, const char *cmd)
	30	{
	31	omap2_prm_set_mod_reg_bits(TI81XX_GLOBAL_RST_COLD, 0,
	32	TI81XX_PRM_DEVICE_RSTCTRL);
	33	while (1);
	34	}