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author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2012-03-12 22:48:16 (GMT) |
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committer | Wim Van Sebroeck <wim@iguana.be> | 2012-03-27 18:08:34 (GMT) |
commit | 3e0113a896803f792ffdf19b016578420824573f (patch) | |
tree | a744a16578464d9fc324d340d0b6ca82a80c5e55 /drivers/watchdog/ep93xx_wdt.c | |
parent | 0197c1c49ef1ff386b2ebb6d3b0fc85a8e174b5c (diff) | |
download | linux-3e0113a896803f792ffdf19b016578420824573f.tar.xz |
watchdog: ep93xx: Convert the watchdog driver into a platform device.
Convert the ep93xx watchdog driver into a platform device and
remove it's dependency on <mach/hardware.h>.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Ryan Mallon <rmallon@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Reviewed-by: Mika Westerberg <mika.westerberg@iki.fi>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/watchdog/ep93xx_wdt.c')
-rw-r--r-- | drivers/watchdog/ep93xx_wdt.c | 51 |
1 files changed, 37 insertions, 14 deletions
diff --git a/drivers/watchdog/ep93xx_wdt.c b/drivers/watchdog/ep93xx_wdt.c index 8caa316..35c49da 100644 --- a/drivers/watchdog/ep93xx_wdt.c +++ b/drivers/watchdog/ep93xx_wdt.c @@ -25,6 +25,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/platform_device.h> #include <linux/module.h> #include <linux/fs.h> #include <linux/miscdevice.h> @@ -32,7 +33,6 @@ #include <linux/timer.h> #include <linux/uaccess.h> #include <linux/io.h> -#include <mach/hardware.h> #define WDT_VERSION "0.3" @@ -42,6 +42,7 @@ static bool 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; @@ -50,26 +51,25 @@ 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) @@ -206,17 +206,31 @@ 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; pr_info("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; @@ -228,14 +242,23 @@ 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, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started"); |