/* * Copyright (C) ST-Ericsson SA 2011-2013 * * License Terms: GNU General Public License v2 * * Author: Mathieu Poirier for ST-Ericsson * Author: Jonas Aaberg for ST-Ericsson */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #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 = dev_get_platdata(&pdev->dev); if (pdata) { if (pdata->timeout > 0) timeout = pdata->timeout; if (pdata->has_28_bits_resolution) ux500_wdt.max_timeout = WATCHDOG_MAX28; } ux500_wdt.parent = &pdev->dev; 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 = { .name = "ux500_wdt", }, }; module_platform_driver(ux500_wdt_driver); MODULE_AUTHOR("Jonas Aaberg "); MODULE_DESCRIPTION("Ux500 Watchdog Driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:ux500_wdt"); ;'>space:mode:
authorMark Brown <broonie@kernel.org>2016-11-15 15:01:09 +0000
committerMark Brown <broonie@kernel.org>2016-11-15 15:22:10 +0000
commit53a20465e6b674eb6ce594b0e9e8940495e95f33 (patch)
tree4d4c29c7c68ab2a1b69e4bd3903949356d2467e8 /tools/perf/Documentation/perf-lock.txt
parent1001354ca34179f3db924eb66672442a173147dc (diff)
regulator: pwm: Add missing quotes to DT example
Reported-by: Peter Rosin <peda@axentia.se> Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'tools/perf/Documentation/perf-lock.txt')