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ARM: orion: wdt: use resource vice direct access 

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Jason Cooper 2012-03-15 00:33:26 +00:00
parent 7399532065
commit a855a7ced4
2 changed files with 21 additions and 10 deletions
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7
arch/arm/plat-orion/common.c
View File

@ -21,6 +21,7 @@
#include <plat/orion_wdt.h>
#include <plat/mv_xor.h>
#include <plat/ehci-orion.h>
#include <mach/bridge-regs.h>
/* Fill in the resources structure and link it into the platform
device structure. There is always a memory region, and nearly
@ -568,13 +569,17 @@ void __init orion_spi_1_init(unsigned long mapbase,
****************************************************************************/
static struct orion_wdt_platform_data orion_wdt_data;
static struct resource orion_wdt_resource =
DEFINE_RES_MEM(TIMER_VIRT_BASE, 0x28);
static struct platform_device orion_wdt_device = {
.name = "orion_wdt",
.id = -1,
.dev = {
.platform_data = &orion_wdt_data,
},
.num_resources = 0,
.resource = &orion_wdt_resource,
.num_resources = 1,
};
void __init orion_wdt_init(unsigned long tclk)

24
drivers/watchdog/orion_wdt.c
View File

@ -28,9 +28,9 @@
/*
* Watchdog timer block registers.
*/
#define TIMER_CTRL (TIMER_VIRT_BASE + 0x0000)
#define TIMER_CTRL 0x0000
#define WDT_EN 0x0010
#define WDT_VAL (TIMER_VIRT_BASE + 0x0024)
#define WDT_VAL 0x0024
#define WDT_MAX_CYCLE_COUNT 0xffffffff
#define WDT_IN_USE 0
@ -40,6 +40,7 @@ static int nowayout = WATCHDOG_NOWAYOUT;
static int heartbeat = -1; /* module parameter (seconds) */
static unsigned int wdt_max_duration; /* (seconds) */
static unsigned int wdt_tclk;
static void __iomem *wdt_reg;
static unsigned long wdt_status;
static DEFINE_SPINLOCK(wdt_lock);
@ -48,7 +49,7 @@ static void orion_wdt_ping(void)
spin_lock(&wdt_lock);
/* Reload watchdog duration */
writel(wdt_tclk * heartbeat, WDT_VAL);
writel(wdt_tclk * heartbeat, wdt_reg + WDT_VAL);
spin_unlock(&wdt_lock);
}
@ -60,7 +61,7 @@ static void orion_wdt_enable(void)
spin_lock(&wdt_lock);
/* Set watchdog duration */
writel(wdt_tclk * heartbeat, WDT_VAL);
writel(wdt_tclk * heartbeat, wdt_reg + WDT_VAL);
/* Clear watchdog timer interrupt */
reg = readl(BRIDGE_CAUSE);
@ -68,9 +69,9 @@ static void orion_wdt_enable(void)
writel(reg, BRIDGE_CAUSE);
/* Enable watchdog timer */
reg = readl(TIMER_CTRL);
reg = readl(wdt_reg + TIMER_CTRL);
reg |= WDT_EN;
writel(reg, TIMER_CTRL);
writel(reg, wdt_reg + TIMER_CTRL);
/* Enable reset on watchdog */
reg = readl(RSTOUTn_MASK);
@ -92,9 +93,9 @@ static void orion_wdt_disable(void)
writel(reg, RSTOUTn_MASK);
/* Disable watchdog timer */
reg = readl(TIMER_CTRL);
reg = readl(wdt_reg + TIMER_CTRL);
reg &= ~WDT_EN;
writel(reg, TIMER_CTRL);
writel(reg, wdt_reg + TIMER_CTRL);
spin_unlock(&wdt_lock);
}
@ -102,7 +103,7 @@ static void orion_wdt_disable(void)
static int orion_wdt_get_timeleft(int *time_left)
{
spin_lock(&wdt_lock);
*time_left = readl(WDT_VAL) / wdt_tclk;
*time_left = readl(wdt_reg + WDT_VAL) / wdt_tclk;
spin_unlock(&wdt_lock);
return 0;
}
@ -236,6 +237,7 @@ static struct miscdevice orion_wdt_miscdev = {
static int __devinit orion_wdt_probe(struct platform_device *pdev)
{
struct orion_wdt_platform_data *pdata = pdev->dev.platform_data;
struct resource *res;
int ret;
if (pdata) {
@ -245,6 +247,10 @@ static int __devinit orion_wdt_probe(struct platform_device *pdev)
return -ENODEV;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
wdt_reg = ioremap(res->start, resource_size(res));
if (orion_wdt_miscdev.parent)
return -EBUSY;
orion_wdt_miscdev.parent = &pdev->dev;