mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-12 16:58:53 +00:00
watchdog: remove ixp2000 driver
The platform is removed, so there are no users of this driver. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Rob Herring
Wim Van Sebroeck
parent
62a9aebc5b
commit
065e823830
@ -129,17 +129,6 @@ config 977_WATCHDOG
|
|||||||
|
|
||||||
Not sure? It's safe to say N.
|
Not sure? It's safe to say N.
|
||||||
|
|
||||||
config IXP2000_WATCHDOG
|
|
||||||
tristate "IXP2000 Watchdog"
|
|
||||||
depends on ARCH_IXP2000
|
|
||||||
help
|
|
||||||
Say Y here if to include support for the watchdog timer
|
|
||||||
in the Intel IXP2000(2400, 2800, 2850) network processors.
|
|
||||||
This driver can be built as a module by choosing M. The module
|
|
||||||
will be called ixp2000_wdt.
|
|
||||||
|
|
||||||
Say N if you are unsure.
|
|
||||||
|
|
||||||
config IXP4XX_WATCHDOG
|
config IXP4XX_WATCHDOG
|
||||||
tristate "IXP4xx Watchdog"
|
tristate "IXP4xx Watchdog"
|
||||||
depends on ARCH_IXP4XX
|
depends on ARCH_IXP4XX
|
||||||
|
|||||||
@ -36,7 +36,6 @@ obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
|
|||||||
obj-$(CONFIG_TWL4030_WATCHDOG) += twl4030_wdt.o
|
obj-$(CONFIG_TWL4030_WATCHDOG) += twl4030_wdt.o
|
||||||
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
|
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
|
||||||
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
|
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
|
||||||
obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
|
|
||||||
obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
|
obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
|
||||||
obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
|
obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
|
||||||
obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
|
obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
|
||||||
|
|||||||
@ -1,215 +0,0 @@
|
|||||||
/*
|
|
||||||
* drivers/char/watchdog/ixp2000_wdt.c
|
|
||||||
*
|
|
||||||
* Watchdog driver for Intel IXP2000 network processors
|
|
||||||
*
|
|
||||||
* Adapted from the IXP4xx watchdog driver by Lennert Buytenhek.
|
|
||||||
* The original version carries these notices:
|
|
||||||
*
|
|
||||||
* Author: Deepak Saxena <dsaxena@plexity.net>
|
|
||||||
*
|
|
||||||
* Copyright 2004 (c) MontaVista, Software, Inc.
|
|
||||||
* Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
|
|
||||||
*
|
|
||||||
* This file is licensed under the terms of the GNU General Public
|
|
||||||
* License version 2. This program is licensed "as is" without any
|
|
||||||
* warranty of any kind, whether express or implied.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
||||||
|
|
||||||
#include <linux/module.h>
|
|
||||||
#include <linux/moduleparam.h>
|
|
||||||
#include <linux/types.h>
|
|
||||||
#include <linux/timer.h>
|
|
||||||
#include <linux/kernel.h>
|
|
||||||
#include <linux/fs.h>
|
|
||||||
#include <linux/miscdevice.h>
|
|
||||||
#include <linux/watchdog.h>
|
|
||||||
#include <linux/init.h>
|
|
||||||
#include <linux/bitops.h>
|
|
||||||
#include <linux/uaccess.h>
|
|
||||||
#include <mach/hardware.h>
|
|
||||||
|
|
||||||
static bool nowayout = WATCHDOG_NOWAYOUT;
|
|
||||||
static unsigned int heartbeat = 60; /* (secs) Default is 1 minute */
|
|
||||||
static unsigned long wdt_status;
|
|
||||||
static DEFINE_SPINLOCK(wdt_lock);
|
|
||||||
|
|
||||||
#define WDT_IN_USE 0
|
|
||||||
#define WDT_OK_TO_CLOSE 1
|
|
||||||
|
|
||||||
static unsigned long wdt_tick_rate;
|
|
||||||
|
|
||||||
static void wdt_enable(void)
|
|
||||||
{
|
|
||||||
spin_lock(&wdt_lock);
|
|
||||||
ixp2000_reg_write(IXP2000_RESET0, *(IXP2000_RESET0) | WDT_RESET_ENABLE);
|
|
||||||
ixp2000_reg_write(IXP2000_TWDE, WDT_ENABLE);
|
|
||||||
ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
|
|
||||||
ixp2000_reg_write(IXP2000_T4_CTL, TIMER_DIVIDER_256 | TIMER_ENABLE);
|
|
||||||
spin_unlock(&wdt_lock);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void wdt_disable(void)
|
|
||||||
{
|
|
||||||
spin_lock(&wdt_lock);
|
|
||||||
ixp2000_reg_write(IXP2000_T4_CTL, 0);
|
|
||||||
spin_unlock(&wdt_lock);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void wdt_keepalive(void)
|
|
||||||
{
|
|
||||||
spin_lock(&wdt_lock);
|
|
||||||
ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
|
|
||||||
spin_unlock(&wdt_lock);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int ixp2000_wdt_open(struct inode *inode, struct file *file)
|
|
||||||
{
|
|
||||||
if (test_and_set_bit(WDT_IN_USE, &wdt_status))
|
|
||||||
return -EBUSY;
|
|
||||||
|
|
||||||
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
|
||||||
|
|
||||||
wdt_enable();
|
|
||||||
|
|
||||||
return nonseekable_open(inode, file);
|
|
||||||
}
|
|
||||||
|
|
||||||
static ssize_t ixp2000_wdt_write(struct file *file, const char *data,
|
|
||||||
size_t len, loff_t *ppos)
|
|
||||||
{
|
|
||||||
if (len) {
|
|
||||||
if (!nowayout) {
|
|
||||||
size_t i;
|
|
||||||
|
|
||||||
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
|
||||||
|
|
||||||
for (i = 0; i != len; i++) {
|
|
||||||
char c;
|
|
||||||
|
|
||||||
if (get_user(c, data + i))
|
|
||||||
return -EFAULT;
|
|
||||||
if (c == 'V')
|
|
||||||
set_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
wdt_keepalive();
|
|
||||||
}
|
|
||||||
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
static const struct watchdog_info ident = {
|
|
||||||
.options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
|
|
||||||
WDIOF_KEEPALIVEPING,
|
|
||||||
.identity = "IXP2000 Watchdog",
|
|
||||||
};
|
|
||||||
|
|
||||||
static long ixp2000_wdt_ioctl(struct file *file, unsigned int cmd,
|
|
||||||
unsigned long arg)
|
|
||||||
{
|
|
||||||
int ret = -ENOTTY;
|
|
||||||
int time;
|
|
||||||
|
|
||||||
switch (cmd) {
|
|
||||||
case WDIOC_GETSUPPORT:
|
|
||||||
ret = copy_to_user((struct watchdog_info *)arg, &ident,
|
|
||||||
sizeof(ident)) ? -EFAULT : 0;
|
|
||||||
break;
|
|
||||||
|
|
||||||
case WDIOC_GETSTATUS:
|
|
||||||
ret = put_user(0, (int *)arg);
|
|
||||||
break;
|
|
||||||
|
|
||||||
case WDIOC_GETBOOTSTATUS:
|
|
||||||
ret = put_user(0, (int *)arg);
|
|
||||||
break;
|
|
||||||
|
|
||||||
case WDIOC_KEEPALIVE:
|
|
||||||
wdt_enable();
|
|
||||||
ret = 0;
|
|
||||||
break;
|
|
||||||
|
|
||||||
case WDIOC_SETTIMEOUT:
|
|
||||||
ret = get_user(time, (int *)arg);
|
|
||||||
if (ret)
|
|
||||||
break;
|
|
||||||
|
|
||||||
if (time <= 0 || time > 60) {
|
|
||||||
ret = -EINVAL;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
heartbeat = time;
|
|
||||||
wdt_keepalive();
|
|
||||||
/* Fall through */
|
|
||||||
|
|
||||||
case WDIOC_GETTIMEOUT:
|
|
||||||
ret = put_user(heartbeat, (int *)arg);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int ixp2000_wdt_release(struct inode *inode, struct file *file)
|
|
||||||
{
|
|
||||||
if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
|
|
||||||
wdt_disable();
|
|
||||||
else
|
|
||||||
pr_crit("Device closed unexpectedly - timer will not stop\n");
|
|
||||||
clear_bit(WDT_IN_USE, &wdt_status);
|
|
||||||
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
static const struct file_operations ixp2000_wdt_fops = {
|
|
||||||
.owner = THIS_MODULE,
|
|
||||||
.llseek = no_llseek,
|
|
||||||
.write = ixp2000_wdt_write,
|
|
||||||
.unlocked_ioctl = ixp2000_wdt_ioctl,
|
|
||||||
.open = ixp2000_wdt_open,
|
|
||||||
.release = ixp2000_wdt_release,
|
|
||||||
};
|
|
||||||
|
|
||||||
static struct miscdevice ixp2000_wdt_miscdev = {
|
|
||||||
.minor = WATCHDOG_MINOR,
|
|
||||||
.name = "watchdog",
|
|
||||||
.fops = &ixp2000_wdt_fops,
|
|
||||||
};
|
|
||||||
|
|
||||||
static int __init ixp2000_wdt_init(void)
|
|
||||||
{
|
|
||||||
if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) {
|
|
||||||
pr_info("Unable to use IXP2000 watchdog due to IXP2800 erratum #25\n");
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
wdt_tick_rate = (*IXP2000_T1_CLD * HZ) / 256;
|
|
||||||
return misc_register(&ixp2000_wdt_miscdev);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void __exit ixp2000_wdt_exit(void)
|
|
||||||
{
|
|
||||||
misc_deregister(&ixp2000_wdt_miscdev);
|
|
||||||
}
|
|
||||||
|
|
||||||
module_init(ixp2000_wdt_init);
|
|
||||||
module_exit(ixp2000_wdt_exit);
|
|
||||||
|
|
||||||
MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
|
|
||||||
MODULE_DESCRIPTION("IXP2000 Network Processor Watchdog");
|
|
||||||
|
|
||||||
module_param(heartbeat, int, 0);
|
|
||||||
MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
|
|
||||||
|
|
||||||
module_param(nowayout, bool, 0);
|
|
||||||
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
|
|
||||||
|
|
||||||
MODULE_LICENSE("GPL");
|
|
||||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
|
||||||
|
|
||||||
Loading…
x
Reference in New Issue
Block a user