Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

[linux-drm-fsl-dcu.git] / arch / mips / pic32 / common / reset.c

diff --git a/arch/mips/pic32/common/reset.c b/arch/mips/pic32/common/reset.c
new file mode 100644 (file)
index 0000000..8334575
--- /dev/null
+++ b/arch/mips/pic32/common/reset.c
@@ -0,0 +1,62 @@
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ */
+#include <linux/init.h>
+#include <linux/pm.h>
+#include <asm/reboot.h>
+#include <asm/mach-pic32/pic32.h>
+
+#define PIC32_RSWRST           0x10
+
+static void pic32_halt(void)
+{
+       while (1) {
+               __asm__(".set push;\n"
+                       ".set arch=r4000;\n"
+                       "wait;\n"
+                       ".set pop;\n"
+               );
+       }
+}
+
+static void pic32_machine_restart(char *command)
+{
+       void __iomem *reg =
+               ioremap(PIC32_BASE_RESET + PIC32_RSWRST, sizeof(u32));
+
+       pic32_syskey_unlock();
+
+       /* magic write/read */
+       __raw_writel(1, reg);
+       (void)__raw_readl(reg);
+
+       pic32_halt();
+}
+
+static void pic32_machine_halt(void)
+{
+       local_irq_disable();
+
+       pic32_halt();
+}
+
+static int __init mips_reboot_setup(void)
+{
+       _machine_restart = pic32_machine_restart;
+       _machine_halt = pic32_machine_halt;
+       pm_power_off = pic32_machine_halt;
+
+       return 0;
+}
+
+arch_initcall(mips_reboot_setup);