xref: /openbmc/linux/arch/mips/ralink/reset.c (revision 201ddc05) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *
4  * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
5  * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6  * Copyright (C) 2013 John Crispin <john@phrozen.org>
7  */
8 
9 #include <linux/pm.h>
10 #include <linux/io.h>
11 #include <linux/of.h>
12 #include <linux/delay.h>
13 
14 #include <asm/reboot.h>
15 
16 #include <asm/mach-ralink/ralink_regs.h>
17 
18 /* Reset Control */
19 #define SYSC_REG_RESET_CTRL	0x034
20 
21 #define RSTCTL_RESET_PCI	BIT(26)
22 #define RSTCTL_RESET_SYSTEM	BIT(0)
23 
ralink_restart(char * command)24 static void ralink_restart(char *command)
25 {
26 	if (IS_ENABLED(CONFIG_PCI)) {
27 		rt_sysc_m32(0, RSTCTL_RESET_PCI, SYSC_REG_RESET_CTRL);
28 		mdelay(50);
29 	}
30 
31 	local_irq_disable();
32 	rt_sysc_w32(RSTCTL_RESET_SYSTEM, SYSC_REG_RESET_CTRL);
33 	unreachable();
34 }
35 
mips_reboot_setup(void)36 static int __init mips_reboot_setup(void)
37 {
38 	_machine_restart = ralink_restart;
39 
40 	return 0;
41 }
42 
43 arch_initcall(mips_reboot_setup);
44