From 7120438e5d82f445acbfe131a1b58eab7e83fa33 Mon Sep 17 00:00:00 2001
From: Andrey Smirnov <andrew.smirnov@gmail.com>
Date: Thu, 28 Jul 2016 16:07:18 -0700
Subject: powerpc: Convert fsl_rstcr_restart to a reset handler

Convert fsl_rstcr_restart into a function to be registered with
register_reset_handler().

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
[scottwood: Converted mvme7100 as well]
Signed-off-by: Scott Wood <oss@buserror.net>
---
 arch/powerpc/sysdev/fsl_soc.c | 33 ++++++++++++++++++++-------------
 arch/powerpc/sysdev/fsl_soc.h |  2 --
 2 files changed, 20 insertions(+), 15 deletions(-)

(limited to 'arch/powerpc/sysdev')

diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index a09ca704de58..d93056eedcb0 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -29,6 +29,7 @@
 #include <linux/fsl_devices.h>
 #include <linux/fs_enet_pd.h>
 #include <linux/fs_uart_pd.h>
+#include <linux/reboot.h>
 
 #include <linux/atomic.h>
 #include <asm/io.h>
@@ -180,23 +181,38 @@ EXPORT_SYMBOL(get_baudrate);
 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
 static __be32 __iomem *rstcr;
 
+static int fsl_rstcr_restart(struct notifier_block *this,
+			     unsigned long mode, void *cmd)
+{
+	local_irq_disable();
+	/* set reset control register */
+	out_be32(rstcr, 0x2);	/* HRESET_REQ */
+
+	return NOTIFY_DONE;
+}
+
 static int __init setup_rstcr(void)
 {
 	struct device_node *np;
 
+	static struct notifier_block restart_handler = {
+		.notifier_call = fsl_rstcr_restart,
+		.priority = 128,
+	};
+
 	for_each_node_by_name(np, "global-utilities") {
 		if ((of_get_property(np, "fsl,has-rstcr", NULL))) {
 			rstcr = of_iomap(np, 0) + 0xb0;
-			if (!rstcr)
+			if (!rstcr) {
 				printk (KERN_ERR "Error: reset control "
 						"register not mapped!\n");
+			} else {
+				register_restart_handler(&restart_handler);
+			}
 			break;
 		}
 	}
 
-	if (!rstcr && ppc_md.restart == fsl_rstcr_restart)
-		printk(KERN_ERR "No RSTCR register, warm reboot won't work\n");
-
 	of_node_put(np);
 
 	return 0;
@@ -204,15 +220,6 @@ static int __init setup_rstcr(void)
 
 arch_initcall(setup_rstcr);
 
-void __noreturn fsl_rstcr_restart(char *cmd)
-{
-	local_irq_disable();
-	if (rstcr)
-		/* set reset control register */
-		out_be32(rstcr, 0x2);	/* HRESET_REQ */
-
-	while (1) ;
-}
 #endif
 
 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h
index 433566a5ef19..d73daa4f0ccf 100644
--- a/arch/powerpc/sysdev/fsl_soc.h
+++ b/arch/powerpc/sysdev/fsl_soc.h
@@ -19,8 +19,6 @@ extern u32 fsl_get_sys_freq(void);
 struct spi_board_info;
 struct device_node;
 
-extern void __noreturn fsl_rstcr_restart(char *cmd);
-
 /* The different ports that the DIU can be connected to */
 enum fsl_diu_monitor_port {
 	FSL_DIU_PORT_DVI,	/* DVI */
-- 
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