1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (c) 2015 Purna Chandra Mandal <purna.mandal@microchip.com> 4 * 5 */ 6 7#include <asm/io.h> 8#include <mach/pic32.h> 9 10/* SYSKEY */ 11#define UNLOCK_KEY1 0xaa996655 12#define UNLOCK_KEY2 0x556699aa 13#define LOCK_KEY 0 14 15#define RSWRST 0x1250 16 17void _machine_restart(void) 18{ 19 void __iomem *base; 20 21 base = pic32_get_syscfg_base(); 22 23 /* unlock sequence */ 24 writel(LOCK_KEY, base + SYSKEY); 25 writel(UNLOCK_KEY1, base + SYSKEY); 26 writel(UNLOCK_KEY2, base + SYSKEY); 27 28 /* soft reset */ 29 writel(0x1, base + RSWRST); 30 (void) readl(base + RSWRST); 31 32 while (1) 33 ; 34} 35