/* * MOXA ART SoCs watchdog driver. * * Copyright (C) 2013 Jonas Jensen * * Jonas Jensen * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include #include #include #include #include #include #include #include #define REG_COUNT 0x4 #define REG_MODE 0x8 #define REG_ENABLE 0xC struct moxart_wdt_dev { struct watchdog_device dev; void __iomem *base; unsigned int clock_frequency; }; static int heartbeat; static int moxart_wdt_restart(struct watchdog_device *wdt_dev, unsigned long action, void *data) { struct moxart_wdt_dev *moxart_wdt = watchdog_get_drvdata(wdt_dev); writel(1, moxart_wdt->base + REG_COUNT); writel(0x5ab9, moxart_wdt->base + REG_MODE); writel(0x03, moxart_wdt->base + REG_ENABLE); return 0; } static int moxart_wdt_stop(struct watchdog_device *wdt_dev) { struct moxart_wdt_dev *moxart_wdt = watchdog_get_drvdata(wdt_dev); writel(0, moxart_wdt->base + REG_ENABLE); return 0; } static int moxart_wdt_start(struct watchdog_device *wdt_dev) { struct moxart_wdt_dev *moxart_wdt = watchdog_get_drvdata(wdt_dev); writel(moxart_wdt->clock_frequency * wdt_dev->timeout, moxart_wdt->base + REG_COUNT); writel(0x5ab9, moxart_wdt->base + REG_MODE); writel(0x03, moxart_wdt->base + REG_ENABLE); return 0; } static int moxart_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int timeout) { wdt_dev->timeout = timeout; return 0; } static const struct watchdog_info moxart_wdt_info = { .identity = "moxart-wdt", .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, }; static const struct watchdog_ops moxart_wdt_ops = { .owner = THIS_MODULE, .start = moxart_wdt_start, .stop = moxart_wdt_stop, .set_timeout = moxart_wdt_set_timeout, .restart = moxart_wdt_restart, }; static int moxart_wdt_probe(struct platform_device *pdev) { struct moxart_wdt_dev *moxart_wdt; struct device *dev = &pdev->dev; struct device_node *node = dev->of_node; struct resource *res; struct clk *clk; int err; unsigned int max_timeout; bool nowayout = WATCHDOG_NOWAYOUT; moxart_wdt = devm_kzalloc(dev, sizeof(*moxart_wdt), GFP_KERNEL); if (!moxart_wdt) return -ENOMEM; platform_set_drvdata(pdev, moxart_wdt); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); moxart_wdt->base = devm_ioremap_resource(dev, res); if (IS_ERR(moxart_wdt->base)) return PTR_ERR(moxart_wdt->base); clk = of_clk_get(node, 0); if (IS_ERR(clk)) { pr_err("%s: of_clk_get failed\n", __func__); return PTR_ERR(clk); } moxart_wdt->clock_frequency = clk_get_rate(clk); if (moxart_wdt->clock_frequency == 0) { pr_err("%s: incorrect clock frequency\n", __func__); return -EINVAL; } max_timeout = UINT_MAX / moxart_wdt->clock_frequency; moxart_wdt->dev.info = &moxart_wdt_info; moxart_wdt->dev.ops = &moxart_wdt_ops; moxart_wdt->dev.timeout = max_timeout; moxart_wdt->dev.min_timeout = 1; moxart_wdt->dev.max_timeout = max_timeout; moxart_wdt->dev.parent = dev; watchdog_init_timeout(&moxart_wdt->dev, heartbeat, dev); watchdog_set_nowayout(&moxart_wdt->dev, nowayout); watchdog_set_restart_priority(&moxart_wdt->dev, 128); watchdog_set_drvdata(&moxart_wdt->dev, moxart_wdt); err = watchdog_register_device(&moxart_wdt->dev); if (err) return err; dev_dbg(dev, "Watchdog enabled (heartbeat=%d sec, nowayout=%d)\n", moxart_wdt->dev.timeout, nowayout); return 0; } static int moxart_wdt_remove(struct platform_device *pdev) { struct moxart_wdt_dev *moxart_wdt = platform_get_drvdata(pdev); moxart_wdt_stop(&moxart_wdt->dev); return 0; } static const struct of_device_id moxart_watchdog_match[] = { { .compatible = "moxa,moxart-watchdog" }, { }, }; MODULE_DEVICE_TABLE(of, moxart_watchdog_match); static struct platform_driver moxart_wdt_driver = { .probe = moxart_wdt_probe, .remove = moxart_wdt_remove, .driver = { .name = "moxart-watchdog", .of_match_table = moxart_watchdog_match, }, }; module_platform_driver(moxart_wdt_driver); module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds"); MODULE_DESCRIPTION("MOXART watchdog driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Jonas Jensen "); '25'>25space:mode:
authorRuslan Ruslichenko <rruslich@cisco.com>2017-01-17 16:13:52 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-01-18 15:37:28 +0100
commit020eb3daaba2857b32c4cf4c82f503d6a00a67de (patch)
tree329a05b424d783db675a4c711bd7633575e8181b /include/dt-bindings/interrupt-controller/irq.h
parent49def1853334396f948dcb4cedb9347abb318df5 (diff)
x86/ioapic: Restore IO-APIC irq_chip retrigger callback
commit d32932d02e18 removed the irq_retrigger callback from the IO-APIC chip and did not add it to the new IO-APIC-IR irq chip. Unfortunately the software resend fallback is not enabled on X86, so edge interrupts which are received during the lazy disabled state of the interrupt line are not retriggered and therefor lost. Restore the callbacks. [ tglx: Massaged changelog ] Fixes: d32932d02e18 ("x86/irq: Convert IOAPIC to use hierarchical irqdomain interfaces") Signed-off-by: Ruslan Ruslichenko <rruslich@cisco.com> Cc: xe-linux-external@cisco.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1484662432-13580-1-git-send-email-rruslich@cisco.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/dt-bindings/interrupt-controller/irq.h')