diff options
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 15 | ||||
| -rw-r--r-- | arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h | 1 | ||||
| -rw-r--r-- | drivers/watchdog/ep93xx_wdt.c | 51 |
3 files changed, 53 insertions, 14 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index c73e299b08a5..3134baf6c7a4 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -889,6 +889,20 @@ void __init ep93xx_register_ac97(void) platform_device_register(&ep93xx_pcm_device); } +/************************************************************************* + * EP93xx Watchdog + *************************************************************************/ +static struct resource ep93xx_wdt_resources[] = { + DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08), +}; + +static struct platform_device ep93xx_wdt_device = { + .name = "ep93xx-wdt", + .id = -1, + .num_resources = ARRAY_SIZE(ep93xx_wdt_resources), + .resource = ep93xx_wdt_resources, +}; + void __init ep93xx_init_devices(void) { /* Disallow access to MaverickCrunch initially */ @@ -904,6 +918,7 @@ void __init ep93xx_init_devices(void) platform_device_register(&ep93xx_rtc_device); platform_device_register(&ep93xx_ohci_device); platform_device_register(&ep93xx_leds); + platform_device_register(&ep93xx_wdt_device); } void ep93xx_restart(char mode, const char *cmd) diff --git a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h index 72b86878e196..f28afcf29fc1 100644 --- a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h +++ b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h @@ -182,6 +182,7 @@ #define EP93XX_SYSCON_SYSCFG_LCSN1 (1<<0) #define EP93XX_SYSCON_SWLOCK EP93XX_SYSCON_REG(0xc0) +#define EP93XX_WATCHDOG_PHYS_BASE EP93XX_APB_PHYS(0x00140000) #define EP93XX_WATCHDOG_BASE EP93XX_APB_IOMEM(0x00140000) diff --git a/drivers/watchdog/ep93xx_wdt.c b/drivers/watchdog/ep93xx_wdt.c index 726b7df61fd0..09cd888db619 100644 --- a/drivers/watchdog/ep93xx_wdt.c +++ b/drivers/watchdog/ep93xx_wdt.c @@ -23,6 +23,7 @@ * - Add a few missing ioctls */ +#include <linux/platform_device.h> #include <linux/module.h> #include <linux/fs.h> #include <linux/miscdevice.h> @@ -30,7 +31,6 @@ #include <linux/timer.h> #include <linux/uaccess.h> #include <linux/io.h> -#include <mach/hardware.h> #define WDT_VERSION "0.3" #define PFX "ep93xx_wdt: " @@ -41,6 +41,7 @@ static int nowayout = WATCHDOG_NOWAYOUT; static int timeout = WDT_TIMEOUT; +static void __iomem *mmio_base; static struct timer_list timer; static unsigned long next_heartbeat; static unsigned long wdt_status; @@ -49,26 +50,25 @@ static unsigned long boot_status; #define WDT_IN_USE 0 #define WDT_OK_TO_CLOSE 1 -#define EP93XX_WDT_REG(x) (EP93XX_WATCHDOG_BASE + (x)) -#define EP93XX_WDT_WATCHDOG EP93XX_WDT_REG(0x00) -#define EP93XX_WDT_WDSTATUS EP93XX_WDT_REG(0x04) +#define EP93XX_WATCHDOG 0x00 +#define EP93XX_WDSTATUS 0x04 /* reset the wdt every ~200ms */ #define WDT_INTERVAL (HZ/5) static void wdt_enable(void) { - __raw_writew(0xaaaa, EP93XX_WDT_WATCHDOG); + writel(0xaaaa, mmio_base + EP93XX_WATCHDOG); } static void wdt_disable(void) { - __raw_writew(0xaa55, EP93XX_WDT_WATCHDOG); + writel(0xaa55, mmio_base + EP93XX_WATCHDOG); } static inline void wdt_ping(void) { - __raw_writew(0x5555, EP93XX_WDT_WATCHDOG); + writel(0x5555, mmio_base + EP93XX_WATCHDOG); } static void wdt_startup(void) @@ -206,18 +206,32 @@ static void ep93xx_timer_ping(unsigned long data) mod_timer(&timer, jiffies + WDT_INTERVAL); } -static int __init ep93xx_wdt_init(void) +static int __devinit ep93xx_wdt_probe(struct platform_device *pdev) { + struct resource *res; + unsigned long val; int err; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENXIO; + + if (!devm_request_mem_region(&pdev->dev, res->start, + resource_size(res), pdev->name)) + return -EBUSY; + + mmio_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!mmio_base) + return -ENXIO; + err = misc_register(&ep93xx_wdt_miscdev); - boot_status = __raw_readl(EP93XX_WDT_WATCHDOG) & 0x01 ? 1 : 0; + val = readl(mmio_base + EP93XX_WATCHDOG); + boot_status = val & 0x01 ? 1 : 0; printk(KERN_INFO PFX "EP93XX watchdog, driver version " WDT_VERSION "%s\n", - (__raw_readl(EP93XX_WDT_WATCHDOG) & 0x08) - ? " (nCS1 disable detected)" : ""); + (val & 0x08) ? " (nCS1 disable detected)" : ""); if (timeout < 1 || timeout > 3600) { timeout = WDT_TIMEOUT; @@ -230,14 +244,23 @@ static int __init ep93xx_wdt_init(void) return err; } -static void __exit ep93xx_wdt_exit(void) +static int __devexit ep93xx_wdt_remove(struct platform_device *pdev) { wdt_shutdown(); misc_deregister(&ep93xx_wdt_miscdev); + return 0; } -module_init(ep93xx_wdt_init); -module_exit(ep93xx_wdt_exit); +static struct platform_driver ep93xx_wdt_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "ep93xx-wdt", + }, + .probe = ep93xx_wdt_probe, + .remove = __devexit_p(ep93xx_wdt_remove), +}; + +module_platform_driver(ep93xx_wdt_driver); module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started"); |