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watchdog: Convert rdc321x_wdt to use southbridge pci device 

The RDC321x MFD southbridge driver will pass a reference to the
southbridge PCI device which should be used by the watchdog driver for its
operations.  This patch converts the watchdog driver to use the pci_dev
pointer and make use of the base register resource which is passed along
with the platform device.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Florian Fainelli 2010-03-22 22:56:24 -04:00 committed by Samuel Ortiz
parent 9956d02d6e
commit 842102f35a
1 changed files with 40 additions and 13 deletions
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53
drivers/watchdog/rdc321x_wdt.c
View File

@ -1,7 +1,7 @@
/*
* RDC321x watchdog driver
*
* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
* Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
*
* This driver is highly inspired from the cpu5_wdt driver
*
@ -36,8 +36,7 @@
#include <linux/watchdog.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/rdc321x_defs.h>
#include <linux/mfd/rdc321x.h>
#define RDC_WDT_MASK 0x80000000 /* Mask */
#define RDC_WDT_EN 0x00800000 /* Enable bit */
@ -63,6 +62,8 @@ static struct {
int default_ticks;
unsigned long inuse;
spinlock_t lock;
struct pci_dev *sb_pdev;
int base_reg;
} rdc321x_wdt_device;
/* generic helper functions */
@ -70,14 +71,18 @@ static struct {
static void rdc321x_wdt_trigger(unsigned long unused)
{
unsigned long flags;
u32 val;
if (rdc321x_wdt_device.running)
ticks--;
/* keep watchdog alive */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
outl(RDC_WDT_EN | inl(RDC3210_CFGREG_DATA),
RDC3210_CFGREG_DATA);
pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, &val);
val |= RDC_WDT_EN;
pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, val);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
/* requeue?? */
@ -105,10 +110,13 @@ static void rdc321x_wdt_start(void)
/* Clear the timer */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
outl(RDC_CLS_TMR, RDC3210_CFGREG_ADDR);
pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, RDC_CLS_TMR);
/* Enable watchdog and set the timeout to 81.92 us */
outl(RDC_WDT_EN | RDC_WDT_CNT, RDC3210_CFGREG_DATA);
pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg,
RDC_WDT_EN | RDC_WDT_CNT);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
mod_timer(&rdc321x_wdt_device.timer,
@ -148,7 +156,7 @@ static long rdc321x_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
void __user *argp = (void __user *)arg;
unsigned int value;
u32 value;
static const struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "RDC321x WDT",
@ -162,9 +170,10 @@ static long rdc321x_wdt_ioctl(struct file *file, unsigned int cmd,
case WDIOC_GETSTATUS:
/* Read the value from the DATA register */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
value = inl(RDC3210_CFGREG_DATA);
pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, &value);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
if (copy_to_user(argp, &value, sizeof(int)))
if (copy_to_user(argp, &value, sizeof(u32)))
return -EFAULT;
break;
case WDIOC_GETSUPPORT:
@ -219,17 +228,35 @@ static struct miscdevice rdc321x_wdt_misc = {
static int __devinit rdc321x_wdt_probe(struct platform_device *pdev)
{
int err;
struct resource *r;
struct rdc321x_wdt_pdata *pdata;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data supplied\n");
return -ENODEV;
}
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wdt-reg");
if (!r) {
dev_err(&pdev->dev, "failed to get wdt-reg resource\n");
return -ENODEV;
}
rdc321x_wdt_device.sb_pdev = pdata->sb_pdev;
rdc321x_wdt_device.base_reg = r->start;
err = misc_register(&rdc321x_wdt_misc);
if (err < 0) {
printk(KERN_ERR PFX "watchdog misc_register failed\n");
dev_err(&pdev->dev, "misc_register failed\n");
return err;
}
spin_lock_init(&rdc321x_wdt_device.lock);
/* Reset the watchdog */
outl(RDC_WDT_RST, RDC3210_CFGREG_DATA);
pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, RDC_WDT_RST);
init_completion(&rdc321x_wdt_device.stop);
rdc321x_wdt_device.queue = 0;
@ -240,7 +267,7 @@ static int __devinit rdc321x_wdt_probe(struct platform_device *pdev)
rdc321x_wdt_device.default_ticks = ticks;
printk(KERN_INFO PFX "watchdog init success\n");
dev_info(&pdev->dev, "watchdog init success\n");
return 0;
}