diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2012-01-07 12:44:37 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-01-07 20:40:51 +0000 |
| commit | b001befe58691ef3627458cd814e8cee7f845c5f (patch) | |
| tree | 1083f1a1cd3feeceeac4b395534df0ff032fdbc8 /drivers/watchdog/at91sam9_wdt.c | |
| parent | 31b2a868451d630bacfdeddc626371b3f9d9a01c (diff) | |
| parent | 928a11ba36f999436915ea2b1eadf54301f93059 (diff) | |
Merge branch 'samsung/dt' into next/dt
* samsung/dt: (3 commit)
Merge branch 'depends/rmk/for-linus' into samsung/dt
Merge branch 'depends/rmk/restart' into next/cleanup
Merge branch 'next/cleanup' into samsung/dt
Conflicts:
arch/arm/mach-tegra/board-dt.c
arch/arm/mach-tegra/include/mach/entry-macro.S
The latest version of the samsung/dt branch resolves
all sorts of conflicts with the latest upstream, no functional
changes that are not already there.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/watchdog/at91sam9_wdt.c')
| -rw-r--r-- | drivers/watchdog/at91sam9_wdt.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index 87445b2d72a..00562566ef5 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) |