summaryrefslogtreecommitdiffstats
path: root/drivers/watchdog
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 14:21:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 14:21:03 -0800
commitacc952c1f373bf3f66cc7a10680eee1762bed40b (patch)
treede1135ffe304f4d8e53d282e5bb1bde5db04e0ae /drivers/watchdog
parent57e964e1ae9bd4f699ae1074430bcf81a9a11377 (diff)
parent40ba95fdf158713377d47736b1b3a9d75f4f2515 (diff)
downloadop-kernel-dev-acc952c1f373bf3f66cc7a10680eee1762bed40b.zip
op-kernel-dev-acc952c1f373bf3f66cc7a10680eee1762bed40b.tar.gz
Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Cleanups on various subarchitectures Cleanup patches for various ARM platforms and some of their associated drivers, the bulk of these is for mach-91. Arnd ended up pulling in the restart branch from Russell in order to fix up some simple but annoying merge conflicts. * tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (44 commits) arm/at91: fix build of stamp9g20 ARM: u300: delete memory.h MAINTAINERS: add maintainer entry for Picochip picoxcell ARM: picoxcell: move io mappings to common.c ARM: picoxcell: don't reserve irq_descs ARM: picoxcell: remove mach/memory.h ARM: at91: delete the pcontrol_g20_defconfig arm/tegra: Remove code that's ifndef CONFIG_ARM_GIC arm/tegra: remove unused defines arm/tegra: fix variable formatting in makefile ARM: davinci: vpif: move code to driver core header from platform ARM: at91/gpio: fix display of number of irq setuped ARM: at91/gpio: drop PIN_BASE ARM: at91/udc: use gpio_is_valid to check the gpio ARM: at91/ohci: use gpio_is_valid to check the gpio ARM: at91/nand: use gpio_is_valid to check the gpio ARM: at91/mmc: use gpio_is_valid to check the gpio ARM: at91/ide: use gpio_is_valid to check the gpio ARM: at91/pata: use gpio_is_valid to check the gpio ARM: at91/soc: use gpio_is_valid to check the gpio ...
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/at91sam9_wdt.c22
-rw-r--r--drivers/watchdog/at91sam9_wdt.h6
2 files changed, 22 insertions, 6 deletions
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index 87445b2..0056256 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -35,6 +35,11 @@
#define DRV_NAME "AT91SAM9 Watchdog"
+#define wdt_read(field) \
+ __raw_readl(at91wdt_private.base + field)
+#define wdt_write(field, val) \
+ __raw_writel((val), at91wdt_private.base + field)
+
/* AT91SAM9 watchdog runs a 12bit counter @ 256Hz,
* use this to convert a watchdog
* value from/to milliseconds.
@@ -63,6 +68,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
static void at91_ping(unsigned long data);
static struct {
+ void __iomem *base;
unsigned long next_heartbeat; /* the next_heartbeat for the timer */
unsigned long open;
char expect_close;
@@ -77,7 +83,7 @@ static struct {
*/
static inline void at91_wdt_reset(void)
{
- at91_sys_write(AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
+ wdt_write(AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
}
/*
@@ -132,7 +138,7 @@ static int at91_wdt_settimeout(unsigned int timeout)
unsigned int mr;
/* Check if disabled */
- mr = at91_sys_read(AT91_WDT_MR);
+ mr = wdt_read(AT91_WDT_MR);
if (mr & AT91_WDT_WDDIS) {
printk(KERN_ERR DRV_NAME": sorry, watchdog is disabled\n");
return -EIO;
@@ -149,7 +155,7 @@ static int at91_wdt_settimeout(unsigned int timeout)
| AT91_WDT_WDDBGHLT /* disabled in debug mode */
| AT91_WDT_WDD /* restart at any time */
| (timeout & AT91_WDT_WDV); /* timer value */
- at91_sys_write(AT91_WDT_MR, reg);
+ wdt_write(AT91_WDT_MR, reg);
return 0;
}
@@ -248,12 +254,22 @@ static struct miscdevice at91wdt_miscdev = {
static int __init at91wdt_probe(struct platform_device *pdev)
{
+ struct resource *r;
int res;
if (at91wdt_miscdev.parent)
return -EBUSY;
at91wdt_miscdev.parent = &pdev->dev;
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r)
+ return -ENODEV;
+ at91wdt_private.base = ioremap(r->start, resource_size(r));
+ if (!at91wdt_private.base) {
+ dev_err(&pdev->dev, "failed to map registers, aborting.\n");
+ return -ENOMEM;
+ }
+
/* Set watchdog */
res = at91_wdt_settimeout(ms_to_ticks(WDT_HW_TIMEOUT * 1000));
if (res)
diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h
index 757f9ca..c6fbb2e6 100644
--- a/drivers/watchdog/at91sam9_wdt.h
+++ b/drivers/watchdog/at91sam9_wdt.h
@@ -16,11 +16,11 @@
#ifndef AT91_WDT_H
#define AT91_WDT_H
-#define AT91_WDT_CR (AT91_WDT + 0x00) /* Watchdog Control Register */
+#define AT91_WDT_CR 0x00 /* Watchdog Control Register */
#define AT91_WDT_WDRSTT (1 << 0) /* Restart */
#define AT91_WDT_KEY (0xa5 << 24) /* KEY Password */
-#define AT91_WDT_MR (AT91_WDT + 0x04) /* Watchdog Mode Register */
+#define AT91_WDT_MR 0x04 /* Watchdog Mode Register */
#define AT91_WDT_WDV (0xfff << 0) /* Counter Value */
#define AT91_WDT_WDFIEN (1 << 12) /* Fault Interrupt Enable */
#define AT91_WDT_WDRSTEN (1 << 13) /* Reset Processor */
@@ -30,7 +30,7 @@
#define AT91_WDT_WDDBGHLT (1 << 28) /* Debug Halt */
#define AT91_WDT_WDIDLEHLT (1 << 29) /* Idle Halt */
-#define AT91_WDT_SR (AT91_WDT + 0x08) /* Watchdog Status Register */
+#define AT91_WDT_SR 0x08 /* Watchdog Status Register */
#define AT91_WDT_WDUNF (1 << 0) /* Watchdog Underflow */
#define AT91_WDT_WDERR (1 << 1) /* Watchdog Error */
OpenPOWER on IntegriCloud