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Jean-Sebastien A. Beaudry14e067c2013-01-23 16:02:40 -05001/*
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
10#include "common.h"
11#include "prm-regbits-33xx.h"
12#include "prm33xx.h"
13
14/**
15 * am3xx_restart - trigger a software restart of the SoC
16 * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
17 * @cmd: passed from the userspace program rebooting the system (if provided)
18 *
19 * Resets the SoC. For @cmd, see the 'reboot' syscall in
20 * kernel/sys.c. No return value.
21 */
22void am33xx_restart(char mode, const char *cmd)
23{
24 /* TODO: Handle mode and cmd if necessary */
25
26 am33xx_prm_rmw_reg_bits(AM33XX_GLOBAL_WARM_SW_RST_MASK,
27 AM33XX_GLOBAL_WARM_SW_RST_MASK,
28 AM33XX_PRM_DEVICE_MOD,
29 AM33XX_PRM_RSTCTRL_OFFSET);
30
31 /* OCP barrier */
32 (void)am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD,
33 AM33XX_PRM_RSTCTRL_OFFSET);
34}