/* * Driver for Atmel SAMA5D4 Watchdog Timer * * Copyright (C) 2015 Atmel Corporation * * Licensed under GPLv2. */ #include #include #include #include #include #include #include #include #include #include "at91sam9_wdt.h" /* minimum and maximum watchdog timeout, in seconds */ #define MIN_WDT_TIMEOUT 1 #define MAX_WDT_TIMEOUT 16 #define WDT_DEFAULT_TIMEOUT MAX_WDT_TIMEOUT #define WDT_SEC2TICKS(s) ((s) ? (((s) << 8) - 1) : 0) struct sama5d4_wdt { struct watchdog_device wdd; void __iomem *reg_base; u32 config; }; static int wdt_timeout = WDT_DEFAULT_TIMEOUT; static bool nowayout = WATCHDOG_NOWAYOUT; module_param(wdt_timeout, int, 0); MODULE_PARM_DESC(wdt_timeout, "Watchdog timeout in seconds. (default = " __MODULE_STRING(WDT_DEFAULT_TIMEOUT) ")"); module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); #define wdt_read(wdt, field) \ readl_relaxed((wdt)->reg_base + (field)) #define wdt_write(wtd, field, val) \ writel_relaxed((val), (wdt)->reg_base + (field)) static int sama5d4_wdt_start(struct watchdog_device *wdd) { struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd); u32 reg; reg = wdt_read(wdt, AT91_WDT_MR); reg &= ~AT91_WDT_WDDIS; wdt_write(wdt, AT91_WDT_MR, reg); return 0; } static int sama5d4_wdt_stop(struct watchdog_device *wdd) { struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd); u32 reg; reg = wdt_read(wdt, AT91_WDT_MR); reg |= AT91_WDT_WDDIS; wdt_write(wdt, AT91_WDT_MR, reg); return 0; } static int sama5d4_wdt_ping(struct watchdog_device *wdd) { struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd); wdt_write(wdt, AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT); return 0; } static int sama5d4_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout) { struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd); u32 value = WDT_SEC2TICKS(timeout); u32 reg; reg = wdt_read(wdt, AT91_WDT_MR); reg &= ~AT91_WDT_WDV; reg &= ~AT91_WDT_WDD; reg |= AT91_WDT_SET_WDV(value); reg |= AT91_WDT_SET_WDD(value); wdt_write(wdt, AT91_WDT_MR, reg); wdd->timeout = timeout; return 0; } static const struct watchdog_info sama5d4_wdt_info = { .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING, .identity = "Atmel SAMA5D4 Watchdog", }; static struct watchdog_ops sama5d4_wdt_ops = { .owner = THIS_MODULE, .start = sama5d4_wdt_start, .stop = sama5d4_wdt_stop, .ping = sama5d4_wdt_ping, .set_timeout = sama5d4_wdt_set_timeout, }; static irqreturn_t sama5d4_wdt_irq_handler(int irq, void *dev_id) { struct sama5d4_wdt *wdt = platform_get_drvdata(dev_id); if (wdt_read(wdt, AT91_WDT_SR)) { pr_crit("Atmel Watchdog Software Reset\n"); emergency_restart(); pr_crit("Reboot didn't succeed\n"); } return IRQ_HANDLED; } static int of_sama5d4_wdt_init(struct device_node *np, struct sama5d4_wdt *wdt) { const char *tmp; wdt->config = AT91_WDT_WDDIS; if (!of_property_read_string(np, "atmel,watchdog-type", &tmp) && !strcmp(tmp, "software")) wdt->config |= AT91_WDT_WDFIEN; else wdt->config |= AT91_WDT_WDRSTEN; if (of_property_read_bool(np, "atmel,idle-halt")) wdt->config |= AT91_WDT_WDIDLEHLT; if (of_property_read_bool(np, "atmel,dbg-halt")) wdt->config |= AT91_WDT_WDDBGHLT; return 0; } static int sama5d4_wdt_init(struct sama5d4_wdt *wdt) { struct watchdog_device *wdd = &wdt->wdd; u32 value = WDT_SEC2TICKS(wdd->timeout); u32 reg; /* * Because the fields WDV and WDD must not be modified when the WDDIS * bit is set, so clear the WDDIS bit before writing the WDT_MR. */ reg = wdt_read(wdt, AT91_WDT_MR); reg &= ~AT91_WDT_WDDIS; wdt_write(wdt, AT91_WDT_MR, reg); reg = wdt->config; reg |= AT91_WDT_SET_WDD(value); reg |= AT91_WDT_SET_WDV(value); wdt_write(wdt, AT91_WDT_MR, reg); return 0; } static int sama5d4_wdt_probe(struct platform_device *pdev) { struct watchdog_device *wdd; struct sama5d4_wdt *wdt; struct resource *res; void __iomem *regs; u32 irq = 0; int ret; wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL); if (!wdt) return -ENOMEM; wdd = &wdt->wdd; wdd->timeout = wdt_timeout; wdd->info = &sama5d4_wdt_info; wdd->ops = &sama5d4_wdt_ops; wdd->min_timeout = MIN_WDT_TIMEOUT; wdd->max_timeout = MAX_WDT_TIMEOUT; watchdog_set_drvdata(wdd, wdt); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(regs)) return PTR_ERR(regs); wdt->reg_base = regs; if (pdev->dev.of_node) { irq = irq_of_parse_and_map(pdev->dev.of_node, 0); if (!irq) dev_warn(&pdev->dev, "failed to get IRQ from DT\n"); ret = of_sama5d4_wdt_init(pdev->dev.of_node, wdt); if (ret) return ret; } if ((wdt->config & AT91_WDT_WDFIEN) && irq) { ret = devm_request_irq(&pdev->dev, irq, sama5d4_wdt_irq_handler, IRQF_SHARED | IRQF_IRQPOLL | IRQF_NO_SUSPEND, pdev->name, pdev); if (ret) { dev_err(&pdev->dev, "cannot register interrupt handler\n"); return ret; } } ret = watchdog_init_timeout(wdd, wdt_timeout, &pdev->dev); if (ret) { dev_err(&pdev->dev, "unable to set timeout value\n"); return ret; } ret = sama5d4_wdt_init(wdt); if (ret) return ret; watchdog_set_nowayout(wdd, nowayout); ret = watchdog_register_device(wdd); if (ret) { dev_err(&pdev->dev, "failed to register watchdog device\n"); return ret; } platform_set_drvdata(pdev, wdt); dev_info(&pdev->dev, "initialized (timeout = %d sec, nowayout = %d)\n", wdt_timeout, nowayout); return 0; } static int sama5d4_wdt_remove(struct platform_device *pdev) { struct sama5d4_wdt *wdt = platform_get_drvdata(pdev); sama5d4_wdt_stop(&wdt->wdd); watchdog_unregister_device(&wdt->wdd); return 0; } static const struct of_device_id sama5d4_wdt_of_match[] = { { .compatible = "atmel,sama5d4-wdt", }, { } }; MODULE_DEVICE_TABLE(of, sama5d4_wdt_of_match); static struct platform_driver sama5d4_wdt_driver = { .probe = sama5d4_wdt_probe, .remove = sama5d4_wdt_remove, .driver = { .name = "sama5d4_wdt", .of_match_table = sama5d4_wdt_of_match, } }; module_platform_driver(sama5d4_wdt_driver); MODULE_AUTHOR("Atmel Corporation"); MODULE_DESCRIPTION("Atmel SAMA5D4 Watchdog Timer driver"); MODULE_LICENSE("GPL v2"); rible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs/adfs/dir_f.c')