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 }
35