watchdog: octeon-wdt: File cleaning.

* Update copyright and company name.
* Remove unused headers.
* Fix variable spelling and data type.
* Use octal values for module parameters.
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17212/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

drivers/watchdog/octeon-wdt-main.c

 /*
  * Octeon Watchdog driver
  *
- * Copyright (C) 2007, 2008, 2009, 2010 Cavium Networks
+ * Copyright (C) 2007-2017 Cavium, Inc.
  *
  * Converted to use WATCHDOG_CORE by Aaro Koskinen <aaro.koskinen@iki.fi>.
  *
@@ -59,14 +59,9 @@
 #include <linux/interrupt.h>
 #include <linux/watchdog.h>
 #include <linux/cpumask.h>
-#include <linux/bitops.h>
-#include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/string.h>
 #include <linux/delay.h>
 #include <linux/cpu.h>
-#include <linux/smp.h>
-#include <linux/fs.h>
 #include <linux/irq.h>
 
 #include <asm/mipsregs.h>
@@ -85,7 +80,7 @@ static unsigned int max_timeout_sec;
 static unsigned int timeout_sec;
 
 /* Set to non-zero when userspace countdown mode active */
-static int do_coundown;
+static bool do_countdown;
 static unsigned int countdown_reset;
 static unsigned int per_cpu_countdown[NR_CPUS];
 
@@ -94,17 +89,22 @@ static cpumask_t irq_enabled_cpus;
 #define WD_TIMO 60			/* Default heartbeat = 60 seconds */
 
 static int heartbeat = WD_TIMO;
-module_param(heartbeat, int, S_IRUGO);
+module_param(heartbeat, int, 0444);
 MODULE_PARM_DESC(heartbeat,
 	"Watchdog heartbeat in seconds. (0 < heartbeat, default="
 				__MODULE_STRING(WD_TIMO) ")");
 
 static bool nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, bool, S_IRUGO);
+module_param(nowayout, bool, 0444);
 MODULE_PARM_DESC(nowayout,
 	"Watchdog cannot be stopped once started (default="
 				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
+static int disable;
+module_param(disable, int, 0444);
+MODULE_PARM_DESC(disable,
+	"Disable the watchdog entirely (default=0)");
+
 static struct cvmx_boot_vector_element *octeon_wdt_bootvector;
 
 void octeon_wdt_nmi_stage2(void);
@@ -140,7 +140,7 @@ static irqreturn_t octeon_wdt_poke_irq(int cpl, void *dev_id)
 	unsigned int core = cvmx_get_core_num();
 	int cpu = core2cpu(core);
 
-	if (do_coundown) {
+	if (do_countdown) {
 		if (per_cpu_countdown[cpu] > 0) {
 			/* We're alive, poke the watchdog */
 			cvmx_write_csr(CVMX_CIU_PP_POKEX(core), 1);
@@ -324,11 +324,14 @@ static int octeon_wdt_ping(struct watchdog_device __always_unused *wdog)
 	int cpu;
 	int coreid;
 
+	if (disable)
+		return 0;
+
 	for_each_online_cpu(cpu) {
 		coreid = cpu2core(cpu);
 		cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
 		per_cpu_countdown[cpu] = countdown_reset;
-		if ((countdown_reset || !do_coundown) &&
+		if ((countdown_reset || !do_countdown) &&
 		    !cpumask_test_cpu(cpu, &irq_enabled_cpus)) {
 			/* We have to enable the irq */
 			int irq = OCTEON_IRQ_WDOG0 + coreid;
@@ -378,6 +381,9 @@ static int octeon_wdt_set_timeout(struct watchdog_device *wdog,
 
 	octeon_wdt_calc_parameters(t);
 
+	if (disable)
+		return 0;
+
 	for_each_online_cpu(cpu) {
 		coreid = cpu2core(cpu);
 		cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
@@ -394,13 +400,13 @@ static int octeon_wdt_set_timeout(struct watchdog_device *wdog,
 static int octeon_wdt_start(struct watchdog_device *wdog)
 {
 	octeon_wdt_ping(wdog);
-	do_coundown = 1;
+	do_countdown = 1;
 	return 0;
 }
 
 static int octeon_wdt_stop(struct watchdog_device *wdog)
 {
-	do_coundown = 0;
+	do_countdown = 0;
 	octeon_wdt_ping(wdog);
 	return 0;
 }
@@ -473,6 +479,11 @@ static int __init octeon_wdt_init(void)
 		return ret;
 	}
 
+	if (disable) {
+		pr_notice("disabled\n");
+		return 0;
+	}
+
 	cpumask_clear(&irq_enabled_cpus);
 
 	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "watchdog/octeon:online",
@@ -493,6 +504,10 @@ static int __init octeon_wdt_init(void)
 static void __exit octeon_wdt_cleanup(void)
 {
 	watchdog_unregister_device(&octeon_wdt);
+
+	if (disable)
+		return;
+
 	cpuhp_remove_state(octeon_wdt_online);
 
 	/*
@@ -503,7 +518,7 @@ static void __exit octeon_wdt_cleanup(void)
 }
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
-MODULE_DESCRIPTION("Cavium Networks Octeon Watchdog driver.");
+MODULE_AUTHOR("Cavium Inc. <support@cavium.com>");
+MODULE_DESCRIPTION("Cavium Inc. OCTEON Watchdog driver.");
 module_init(octeon_wdt_init);
 module_exit(octeon_wdt_cleanup);