diff options
Diffstat (limited to 'drivers/watchdog/ux500_wdt.c')
| -rw-r--r-- | drivers/watchdog/ux500_wdt.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/drivers/watchdog/ux500_wdt.c b/drivers/watchdog/ux500_wdt.c deleted file mode 100644 index a614d84121c3..000000000000 --- a/drivers/watchdog/ux500_wdt.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2011-2013 - * - * License Terms: GNU General Public License v2 - * - * Author: Mathieu Poirier <mathieu.poirier@linaro.org> for ST-Ericsson - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/moduleparam.h> -#include <linux/miscdevice.h> -#include <linux/err.h> -#include <linux/uaccess.h> -#include <linux/watchdog.h> -#include <linux/platform_device.h> -#include <linux/platform_data/ux500_wdt.h> - -#include <linux/mfd/dbx500-prcmu.h> - -#define WATCHDOG_TIMEOUT 600 /* 10 minutes */ - -#define WATCHDOG_MIN 0 -#define WATCHDOG_MAX28 268435 /* 28 bit resolution in ms == 268435.455 s */ -#define WATCHDOG_MAX32 4294967 /* 32 bit resolution in ms == 4294967.295 s */ - -static unsigned int timeout = WATCHDOG_TIMEOUT; -module_param(timeout, uint, 0); -MODULE_PARM_DESC(timeout, - "Watchdog timeout in seconds. default=" - __MODULE_STRING(WATCHDOG_TIMEOUT) "."); - -static bool nowayout = WATCHDOG_NOWAYOUT; -module_param(nowayout, bool, 0); -MODULE_PARM_DESC(nowayout, - "Watchdog cannot be stopped once started (default=" - __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); - -static int ux500_wdt_start(struct watchdog_device *wdd) -{ - return prcmu_enable_a9wdog(PRCMU_WDOG_ALL); -} - -static int ux500_wdt_stop(struct watchdog_device *wdd) -{ - return prcmu_disable_a9wdog(PRCMU_WDOG_ALL); -} - -static int ux500_wdt_keepalive(struct watchdog_device *wdd) -{ - return prcmu_kick_a9wdog(PRCMU_WDOG_ALL); -} - -static int ux500_wdt_set_timeout(struct watchdog_device *wdd, - unsigned int timeout) -{ - ux500_wdt_stop(wdd); - prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000); - ux500_wdt_start(wdd); - - return 0; -} - -static const struct watchdog_info ux500_wdt_info = { - .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, - .identity = "Ux500 WDT", - .firmware_version = 1, -}; - -static const struct watchdog_ops ux500_wdt_ops = { - .owner = THIS_MODULE, - .start = ux500_wdt_start, - .stop = ux500_wdt_stop, - .ping = ux500_wdt_keepalive, - .set_timeout = ux500_wdt_set_timeout, -}; - -static struct watchdog_device ux500_wdt = { - .info = &ux500_wdt_info, - .ops = &ux500_wdt_ops, - .min_timeout = WATCHDOG_MIN, - .max_timeout = WATCHDOG_MAX32, -}; - -static int ux500_wdt_probe(struct platform_device *pdev) -{ - int ret; - struct ux500_wdt_data *pdata = pdev->dev.platform_data; - - if (pdata) { - if (pdata->timeout > 0) - timeout = pdata->timeout; - if (pdata->has_28_bits_resolution) - ux500_wdt.max_timeout = WATCHDOG_MAX28; - } - - watchdog_set_nowayout(&ux500_wdt, nowayout); - - /* disable auto off on sleep */ - prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false); - - /* set HW initial value */ - prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000); - - ret = watchdog_register_device(&ux500_wdt); - if (ret) - return ret; - - dev_info(&pdev->dev, "initialized\n"); - - return 0; -} - -static int ux500_wdt_remove(struct platform_device *dev) -{ - watchdog_unregister_device(&ux500_wdt); - - return 0; -} - -#ifdef CONFIG_PM -static int ux500_wdt_suspend(struct platform_device *pdev, - pm_message_t state) -{ - if (watchdog_active(&ux500_wdt)) { - ux500_wdt_stop(&ux500_wdt); - prcmu_config_a9wdog(PRCMU_WDOG_CPU1, true); - - prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000); - ux500_wdt_start(&ux500_wdt); - } - return 0; -} - -static int ux500_wdt_resume(struct platform_device *pdev) -{ - if (watchdog_active(&ux500_wdt)) { - ux500_wdt_stop(&ux500_wdt); - prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false); - - prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000); - ux500_wdt_start(&ux500_wdt); - } - return 0; -} -#else -#define ux500_wdt_suspend NULL -#define ux500_wdt_resume NULL -#endif - -static struct platform_driver ux500_wdt_driver = { - .probe = ux500_wdt_probe, - .remove = ux500_wdt_remove, - .suspend = ux500_wdt_suspend, - .resume = ux500_wdt_resume, - .driver = { - .owner = THIS_MODULE, - .name = "ux500_wdt", - }, -}; - -module_platform_driver(ux500_wdt_driver); - -MODULE_AUTHOR("Jonas Aaberg <jonas.aberg@stericsson.com>"); -MODULE_DESCRIPTION("Ux500 Watchdog Driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); -MODULE_ALIAS("platform:ux500_wdt"); |