Joshua Henderson | 2572f00 | 2016-01-13 18:15:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Joshua Henderson <joshua.henderson@microchip.com> |
| 3 | * Copyright (C) 2015 Microchip Technology Inc. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you can distribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License (Version 2) as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * for more details. |
| 13 | */ |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/pm.h> |
| 16 | #include <asm/reboot.h> |
| 17 | #include <asm/mach-pic32/pic32.h> |
| 18 | |
| 19 | #define PIC32_RSWRST 0x10 |
| 20 | |
| 21 | static void pic32_halt(void) |
| 22 | { |
| 23 | while (1) { |
| 24 | __asm__(".set push;\n" |
| 25 | ".set arch=r4000;\n" |
| 26 | "wait;\n" |
| 27 | ".set pop;\n" |
| 28 | ); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | static void pic32_machine_restart(char *command) |
| 33 | { |
| 34 | void __iomem *reg = |
| 35 | ioremap(PIC32_BASE_RESET + PIC32_RSWRST, sizeof(u32)); |
| 36 | |
| 37 | pic32_syskey_unlock(); |
| 38 | |
| 39 | /* magic write/read */ |
| 40 | __raw_writel(1, reg); |
| 41 | (void)__raw_readl(reg); |
| 42 | |
| 43 | pic32_halt(); |
| 44 | } |
| 45 | |
| 46 | static void pic32_machine_halt(void) |
| 47 | { |
| 48 | local_irq_disable(); |
| 49 | |
| 50 | pic32_halt(); |
| 51 | } |
| 52 | |
| 53 | static int __init mips_reboot_setup(void) |
| 54 | { |
| 55 | _machine_restart = pic32_machine_restart; |
| 56 | _machine_halt = pic32_machine_halt; |
| 57 | pm_power_off = pic32_machine_halt; |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | arch_initcall(mips_reboot_setup); |