1/*
 2 * am33xx-restart.c - Code common to all AM33xx machines.
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License version 2 as
 6 * published by the Free Software Foundation.
 7 */
 8#include <linux/kernel.h>
 9#include <linux/reboot.h>
10
11#include "common.h"
12#include "prm-regbits-33xx.h"
13#include "prm33xx.h"
14
15/**
16 * am3xx_restart - trigger a software restart of the SoC
17 * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
18 * @cmd: passed from the userspace program rebooting the system (if provided)
19 *
20 * Resets the SoC.  For @cmd, see the 'reboot' syscall in
21 * kernel/sys.c.  No return value.
22 */
23void am33xx_restart(enum reboot_mode mode, const char *cmd)
24{
25	/* TODO: Handle mode and cmd if necessary */
26
27	am33xx_prm_rmw_reg_bits(AM33XX_RST_GLOBAL_WARM_SW_MASK,
28				AM33XX_RST_GLOBAL_WARM_SW_MASK,
29				AM33XX_PRM_DEVICE_MOD,
30				AM33XX_PRM_RSTCTRL_OFFSET);
31
32	/* OCP barrier */
33	(void)am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD,
34				  AM33XX_PRM_RSTCTRL_OFFSET);
35}