Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip30/ip30-power.c b/arch/mips/sgi-ip30/ip30-power.c
new file mode 100644
index 000000000..120b3f3d5
--- /dev/null
+++ b/arch/mips/sgi-ip30/ip30-power.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ip30-power.c: Software powerdown and reset handling for IP30 architecture.
+ *
+ * Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
+ *               2014 Joshua Kinard <kumba@gentoo.org>
+ *               2009 Johannes Dickgreber <tanzy@gmx.de>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/notifier.h>
+#include <linux/delay.h>
+#include <linux/rtc/ds1685.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+
+#include <asm/reboot.h>
+#include <asm/sgi/heart.h>
+
+static void __noreturn ip30_machine_restart(char *cmd)
+{
+        /*
+         * Execute HEART cold reset
+         *   Yes, it's cold-HEARTed!
+         */
+        heart_write((heart_read(&heart_regs->mode) | HM_COLD_RST),
+                    &heart_regs->mode);
+        unreachable();
+}
+
+static int __init ip30_reboot_setup(void)
+{
+        _machine_restart = ip30_machine_restart;
+
+        return 0;
+}
+
+subsys_initcall(ip30_reboot_setup);