kernel: move the old gpio watchdog driver from generic to brcm47xx

brcm47xx is the only user

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 0 insertions, 360 deletions

diff --git a/target/linux/generic/patches-4.4/990-gpio_wdt.patch b/target/linux/generic/patches-4.4/990-gpio_wdt.patch
deleted file mode 100644
index 5856a5c50e..0000000000
--- a/target/linux/generic/patches-4.4/990-gpio_wdt.patch
+++ /dev/null
@@ -1,360 +0,0 @@
-This generic GPIO watchdog is used on Huawei E970 (brcm47xx)
-
-Signed-off-by: Mathias Adam <m.adam--openwrt@adamis.de>
-
---- a/drivers/watchdog/Kconfig
-+++ b/drivers/watchdog/Kconfig
-@@ -1216,6 +1216,15 @@ config WDT_MTX1
- 	  Hardware driver for the MTX-1 boards. This is a watchdog timer that
- 	  will reboot the machine after a 100 seconds timer expired.
- 
-+config GPIO_WDT
-+	tristate "GPIO Hardware Watchdog"
-+ 	help
-+	  Hardware driver for GPIO-controlled watchdogs. GPIO pin and
-+	  toggle interval settings are platform-specific. The driver
-+	  will stop toggling the GPIO (i.e. machine reboots) after a
-+	  100 second timer expired and no process has written to
-+	  /dev/watchdog during that time.
-+
- config PNX833X_WDT
- 	tristate "PNX833x Hardware Watchdog"
- 	depends on SOC_PNX8335
---- a/drivers/watchdog/Makefile
-+++ b/drivers/watchdog/Makefile
-@@ -140,6 +140,7 @@ obj-$(CONFIG_RC32434_WDT) += rc32434_wdt
- obj-$(CONFIG_INDYDOG) += indydog.o
- obj-$(CONFIG_JZ4740_WDT) += jz4740_wdt.o
- obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
-+obj-$(CONFIG_GPIO_WDT) += old_gpio_wdt.o
- obj-$(CONFIG_PNX833X_WDT) += pnx833x_wdt.o
- obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
- obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
---- /dev/null
-+++ b/drivers/watchdog/old_gpio_wdt.c
-@@ -0,0 +1,301 @@
-+/*
-+ *      Driver for GPIO-controlled Hardware Watchdogs.
-+ *
-+ *      Copyright (C) 2013 Mathias Adam <m.adam--linux@adamis.de>
-+ *
-+ *      Replaces mtx1_wdt (driver for the MTX-1 Watchdog):
-+ *
-+ *      (C) Copyright 2005 4G Systems <info@4g-systems.biz>,
-+ *                              All Rights Reserved.
-+ *                              http://www.4g-systems.biz
-+ *
-+ *      (C) Copyright 2007 OpenWrt.org, Florian Fainelli <florian@openwrt.org>
-+ *
-+ *      This program is free software; you can redistribute it and/or
-+ *      modify it under the terms of the GNU General Public License
-+ *      as published by the Free Software Foundation; either version
-+ *      2 of the License, or (at your option) any later version.
-+ *
-+ *      Neither Michael Stickel nor 4G Systems admit liability nor provide
-+ *      warranty for any of this software. This material is provided
-+ *      "AS-IS" and at no charge.
-+ *
-+ *      (c) Copyright 2005    4G Systems <info@4g-systems.biz>
-+ *
-+ *      Release 0.01.
-+ *      Author: Michael Stickel  michael.stickel@4g-systems.biz
-+ *
-+ *      Release 0.02.
-+ *      Author: Florian Fainelli florian@openwrt.org
-+ *              use the Linux watchdog/timer APIs
-+ *
-+ *      Release 0.03.
-+ *      Author: Mathias Adam <m.adam--linux@adamis.de>
-+ *              make it a generic gpio watchdog driver
-+ *
-+ *      The Watchdog is configured to reset the MTX-1
-+ *      if it is not triggered for 100 seconds.
-+ *      It should not be triggered more often than 1.6 seconds.
-+ *
-+ *      A timer triggers the watchdog every 5 seconds, until
-+ *      it is opened for the first time. After the first open
-+ *      it MUST be triggered every 2..95 seconds.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/moduleparam.h>
-+#include <linux/types.h>
-+#include <linux/errno.h>
-+#include <linux/miscdevice.h>
-+#include <linux/fs.h>
-+#include <linux/init.h>
-+#include <linux/ioport.h>
-+#include <linux/timer.h>
-+#include <linux/completion.h>
-+#include <linux/jiffies.h>
-+#include <linux/watchdog.h>
-+#include <linux/platform_device.h>
-+#include <linux/io.h>
-+#include <linux/uaccess.h>
-+#include <linux/gpio.h>
-+#include <linux/old_gpio_wdt.h>
-+
-+static int ticks = 100 * HZ;
-+
-+static struct {
-+	struct completion stop;
-+	spinlock_t lock;
-+	int running;
-+	struct timer_list timer;
-+	int queue;
-+	int default_ticks;
-+	unsigned long inuse;
-+	unsigned gpio;
-+	unsigned int gstate;
-+	int interval;
-+	int first_interval;
-+} gpio_wdt_device;
-+
-+static void gpio_wdt_trigger(unsigned long unused)
-+{
-+	spin_lock(&gpio_wdt_device.lock);
-+	if (gpio_wdt_device.running && ticks > 0)
-+		ticks -= gpio_wdt_device.interval;
-+
-+	/* toggle wdt gpio */
-+	gpio_wdt_device.gstate = !gpio_wdt_device.gstate;
-+	gpio_set_value(gpio_wdt_device.gpio, gpio_wdt_device.gstate);
-+
-+	if (gpio_wdt_device.queue && ticks > 0)
-+		mod_timer(&gpio_wdt_device.timer, jiffies + gpio_wdt_device.interval);
-+	else
-+		complete(&gpio_wdt_device.stop);
-+	spin_unlock(&gpio_wdt_device.lock);
-+}
-+
-+static void gpio_wdt_reset(void)
-+{
-+	ticks = gpio_wdt_device.default_ticks;
-+}
-+
-+
-+static void gpio_wdt_start(void)
-+{
-+	unsigned long flags;
-+
-+	spin_lock_irqsave(&gpio_wdt_device.lock, flags);
-+	if (!gpio_wdt_device.queue) {
-+		gpio_wdt_device.queue = 1;
-+		gpio_wdt_device.gstate = 1;
-+		gpio_set_value(gpio_wdt_device.gpio, 1);
-+		mod_timer(&gpio_wdt_device.timer, jiffies + gpio_wdt_device.first_interval);
-+	}
-+	gpio_wdt_device.running++;
-+	spin_unlock_irqrestore(&gpio_wdt_device.lock, flags);
-+}
-+
-+static int gpio_wdt_stop(void)
-+{
-+	unsigned long flags;
-+
-+	spin_lock_irqsave(&gpio_wdt_device.lock, flags);
-+	if (gpio_wdt_device.queue) {
-+		gpio_wdt_device.queue = 0;
-+		gpio_wdt_device.gstate = 0;
-+		gpio_set_value(gpio_wdt_device.gpio, 0);
-+	}
-+	ticks = gpio_wdt_device.default_ticks;
-+	spin_unlock_irqrestore(&gpio_wdt_device.lock, flags);
-+	return 0;
-+}
-+
-+/* Filesystem functions */
-+
-+static int gpio_wdt_open(struct inode *inode, struct file *file)
-+{
-+	if (test_and_set_bit(0, &gpio_wdt_device.inuse))
-+		return -EBUSY;
-+	return nonseekable_open(inode, file);
-+}
-+
-+
-+static int gpio_wdt_release(struct inode *inode, struct file *file)
-+{
-+	clear_bit(0, &gpio_wdt_device.inuse);
-+	return 0;
-+}
-+
-+static long gpio_wdt_ioctl(struct file *file, unsigned int cmd,
-+							unsigned long arg)
-+{
-+	void __user *argp = (void __user *)arg;
-+	int __user *p = (int __user *)argp;
-+	unsigned int value;
-+	static const struct watchdog_info ident = {
-+		.options = WDIOF_CARDRESET,
-+		.identity = "GPIO WDT",
-+	};
-+
-+	switch (cmd) {
-+	case WDIOC_GETSUPPORT:
-+		if (copy_to_user(argp, &ident, sizeof(ident)))
-+			return -EFAULT;
-+		break;
-+	case WDIOC_GETSTATUS:
-+	case WDIOC_GETBOOTSTATUS:
-+		put_user(0, p);
-+		break;
-+	case WDIOC_SETOPTIONS:
-+		if (get_user(value, p))
-+			return -EFAULT;
-+		if (value & WDIOS_ENABLECARD)
-+			gpio_wdt_start();
-+		else if (value & WDIOS_DISABLECARD)
-+			gpio_wdt_stop();
-+		else
-+			return -EINVAL;
-+		return 0;
-+	case WDIOC_KEEPALIVE:
-+		gpio_wdt_reset();
-+		break;
-+	default:
-+		return -ENOTTY;
-+	}
-+	return 0;
-+}
-+
-+
-+static ssize_t gpio_wdt_write(struct file *file, const char *buf,
-+						size_t count, loff_t *ppos)
-+{
-+	if (!count)
-+		return -EIO;
-+	gpio_wdt_reset();
-+	return count;
-+}
-+
-+static const struct file_operations gpio_wdt_fops = {
-+	.owner		= THIS_MODULE,
-+	.llseek		= no_llseek,
-+	.unlocked_ioctl	= gpio_wdt_ioctl,
-+	.open		= gpio_wdt_open,
-+	.write		= gpio_wdt_write,
-+	.release	= gpio_wdt_release,
-+};
-+
-+
-+static struct miscdevice gpio_wdt_misc = {
-+	.minor	= WATCHDOG_MINOR,
-+	.name	= "watchdog",
-+	.fops	= &gpio_wdt_fops,
-+};
-+
-+
-+static int gpio_wdt_probe(struct platform_device *pdev)
-+{
-+	int ret;
-+	struct gpio_wdt_platform_data *gpio_wdt_data = pdev->dev.platform_data;
-+
-+	gpio_wdt_device.gpio = gpio_wdt_data->gpio;
-+	gpio_wdt_device.interval = gpio_wdt_data->interval;
-+	gpio_wdt_device.first_interval = gpio_wdt_data->first_interval;
-+	if (gpio_wdt_device.first_interval <= 0) {
-+		gpio_wdt_device.first_interval = gpio_wdt_device.interval;
-+	}
-+
-+	ret = gpio_request(gpio_wdt_device.gpio, "gpio-wdt");
-+	if (ret < 0) {
-+		dev_err(&pdev->dev, "failed to request gpio");
-+		return ret;
-+	}
-+
-+	spin_lock_init(&gpio_wdt_device.lock);
-+	init_completion(&gpio_wdt_device.stop);
-+	gpio_wdt_device.queue = 0;
-+	clear_bit(0, &gpio_wdt_device.inuse);
-+	setup_timer(&gpio_wdt_device.timer, gpio_wdt_trigger, 0L);
-+	gpio_wdt_device.default_ticks = ticks;
-+
-+	gpio_wdt_start();
-+	dev_info(&pdev->dev, "GPIO Hardware Watchdog driver (gpio=%i interval=%i/%i)\n",
-+		gpio_wdt_data->gpio, gpio_wdt_data->first_interval, gpio_wdt_data->interval);
-+	return 0;
-+}
-+
-+static int gpio_wdt_remove(struct platform_device *pdev)
-+{
-+	/* FIXME: do we need to lock this test ? */
-+	if (gpio_wdt_device.queue) {
-+		gpio_wdt_device.queue = 0;
-+		wait_for_completion(&gpio_wdt_device.stop);
-+	}
-+
-+	gpio_free(gpio_wdt_device.gpio);
-+	misc_deregister(&gpio_wdt_misc);
-+	return 0;
-+}
-+
-+static struct platform_driver gpio_wdt_driver = {
-+	.probe = gpio_wdt_probe,
-+	.remove = gpio_wdt_remove,
-+	.driver.name = "gpio-wdt",
-+	.driver.owner = THIS_MODULE,
-+};
-+
-+static int __init gpio_wdt_init(void)
-+{
-+	return platform_driver_register(&gpio_wdt_driver);
-+}
-+arch_initcall(gpio_wdt_init);
-+
-+/*
-+ * We do wdt initialization in two steps: arch_initcall probes the wdt
-+ * very early to start pinging the watchdog (misc devices are not yet
-+ * available), and later module_init() just registers the misc device.
-+ */
-+static int gpio_wdt_init_late(void)
-+{
-+	int ret;
-+
-+	ret = misc_register(&gpio_wdt_misc);
-+	if (ret < 0) {
-+		pr_err("GPIO_WDT: failed to register misc device\n");
-+		return ret;
-+	}
-+	return 0;
-+}
-+#ifndef MODULE
-+module_init(gpio_wdt_init_late);
-+#endif
-+
-+static void __exit gpio_wdt_exit(void)
-+{
-+	platform_driver_unregister(&gpio_wdt_driver);
-+}
-+module_exit(gpio_wdt_exit);
-+
-+MODULE_AUTHOR("Michael Stickel, Florian Fainelli, Mathias Adam");
-+MODULE_DESCRIPTION("Driver for GPIO hardware watchdogs");
-+MODULE_LICENSE("GPL");
-+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-+MODULE_ALIAS("platform:gpio-wdt");
---- /dev/null
-+++ b/include/linux/old_gpio_wdt.h
-@@ -0,0 +1,21 @@
-+/*
-+ *  Definitions for the GPIO watchdog driver
-+ *
-+ *  Copyright (C) 2013 Mathias Adam <m.adam--linux@adamis.de>
-+ *
-+ *  This program is free software; you can redistribute it and/or modify
-+ *  it under the terms of the GNU General Public License version 2 as
-+ *  published by the Free Software Foundation.
-+ *
-+ */
-+
-+#ifndef _GPIO_WDT_H_
-+#define _GPIO_WDT_H_
-+
-+struct gpio_wdt_platform_data {
-+	int	gpio;		/* GPIO line number */
-+	int	interval;	/* watchdog reset interval in system ticks */
-+	int	first_interval;	/* first wd reset interval in system ticks */
-+};
-+
-+#endif /* _GPIO_WDT_H_ */