diff options
82 files changed, 391 insertions, 453 deletions
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt index f378922906f6..a575e42f7fec 100644 --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt @@ -145,6 +145,16 @@ Optional Child nodes: - Data cells of ocotp: Detailed bindings are described in bindings/nvmem/nvmem.txt +Watchdog bindings based on SCU Message Protocol +------------------------------------------------------------ + +Required properties: +- compatible: should be: + "fsl,imx8qxp-sc-wdt" + followed by "fsl,imx-sc-wdt"; +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + Example (imx8qxp): ------------- aliases { @@ -207,6 +217,11 @@ firmware { rtc: rtc { compatible = "fsl,imx8qxp-sc-rtc"; }; + + watchdog { + compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt"; + timeout-sec = <60>; + }; }; }; diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt deleted file mode 100644 index 02b87e92ae68..000000000000 --- a/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt +++ /dev/null @@ -1,24 +0,0 @@ -* Freescale i.MX System Controller Watchdog - -i.MX system controller watchdog is for i.MX SoCs with system controller inside, -the watchdog is managed by system controller, users can ONLY communicate with -system controller from secure mode for watchdog operations, so Linux i.MX system -controller watchdog driver will call ARM SMC API and trap into ARM-Trusted-Firmware -for watchdog operations, ARM-Trusted-Firmware is running at secure EL3 mode and -it will request system controller to execute the watchdog operation passed from -Linux kernel. - -Required properties: -- compatible: Should be : - "fsl,imx8qxp-sc-wdt" - followed by "fsl,imx-sc-wdt"; - -Optional properties: -- timeout-sec : Contains the watchdog timeout in seconds. - -Examples: - -watchdog { - compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt"; - timeout-sec = <60>; -}; diff --git a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt b/Documentation/devicetree/bindings/watchdog/renesas,wdt.txt index 9f365c1a3399..9f365c1a3399 100644 --- a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/renesas,wdt.txt diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt index 46055254e8dd..e65198d82a2b 100644 --- a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt @@ -6,6 +6,7 @@ Required properties: "allwinner,sun4i-a10-wdt" "allwinner,sun6i-a31-wdt" "allwinner,sun50i-a64-wdt","allwinner,sun6i-a31-wdt" + "allwinner,sun50i-h6-wdt","allwinner,sun6i-a31-wdt" "allwinner,suniv-f1c100s-wdt", "allwinner,sun4i-a10-wdt" - reg : Specifies base physical address and size of the registers. diff --git a/Documentation/watchdog/hpwdt.rst b/Documentation/watchdog/hpwdt.rst index 94a96371113e..c165d92cfd12 100644 --- a/Documentation/watchdog/hpwdt.rst +++ b/Documentation/watchdog/hpwdt.rst @@ -39,6 +39,10 @@ Last reviewed: 08/20/2018 Default value is set when compiling the kernel. If it is set to "Y", then there is no way of disabling the watchdog once it has been started. + kdumptimeout Minimum timeout in seconds to apply upon receipt of an NMI + before calling panic. (-1) disables the watchdog. When value + is > 0, the timer is reprogrammed with the greater of + value or current timeout value. ============ ================================================================ NOTE: diff --git a/Documentation/watchdog/watchdog-parameters.rst b/Documentation/watchdog/watchdog-parameters.rst index b121caae7798..a3985cc5aeda 100644 --- a/Documentation/watchdog/watchdog-parameters.rst +++ b/Documentation/watchdog/watchdog-parameters.rst @@ -13,6 +13,17 @@ modules. ------------------------------------------------- +watchdog core: + open_timeout: + Maximum time, in seconds, for which the watchdog framework will take + care of pinging a running hardware watchdog until userspace opens the + corresponding /dev/watchdogN device. A value of 0 means an infinite + timeout. Setting this to a non-zero value can be useful to ensure that + either userspace comes up properly, or the board gets reset and allows + fallback logic in the bootloader to try something else. + +------------------------------------------------- + acquirewdt: wdt_stop: Acquire WDT 'stop' io port (default 0x43) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 6cad0b33d7ad..8188963a405b 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -58,6 +58,15 @@ config WATCHDOG_HANDLE_BOOT_ENABLED the watchdog on its own. Thus if your userspace does not start fast enough your device will reboot. +config WATCHDOG_OPEN_TIMEOUT + int "Timeout value for opening watchdog device" + default 0 + help + The maximum time, in seconds, for which the watchdog framework takes + care of pinging a hardware watchdog. A value of 0 means infinite. The + value set here can be overridden by the commandline parameter + "watchdog.open_timeout". + config WATCHDOG_SYSFS bool "Read different watchdog information through sysfs" help @@ -717,6 +726,7 @@ config IMX2_WDT config IMX_SC_WDT tristate "IMX SC Watchdog" depends on HAVE_ARM_SMCCC + depends on IMX_SCU select WATCHDOG_CORE help This is the driver for the system controller watchdog diff --git a/drivers/watchdog/acquirewdt.c b/drivers/watchdog/acquirewdt.c index 957d1255d4ca..848db958411e 100644 --- a/drivers/watchdog/acquirewdt.c +++ b/drivers/watchdog/acquirewdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Acquire Single Board Computer Watchdog Timer driver * @@ -6,11 +7,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c index 2766af292a71..0d02bb275b3d 100644 --- a/drivers/watchdog/advantechwdt.c +++ b/drivers/watchdog/advantechwdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Advantech Single Board Computer WDT driver * @@ -9,11 +10,6 @@ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>, * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index f0148637e5dd..cc71861e033a 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -309,13 +309,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY) wdt->wdd.bootstatus = WDIOF_CARDRESET; - ret = devm_watchdog_register_device(dev, &wdt->wdd); - if (ret) { - dev_err(dev, "failed to register\n"); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, &wdt->wdd); } static struct platform_driver aspeed_watchdog_driver = { diff --git a/drivers/watchdog/bcm2835_wdt.c b/drivers/watchdog/bcm2835_wdt.c index 560c1c54c177..dec6ca019bea 100644 --- a/drivers/watchdog/bcm2835_wdt.c +++ b/drivers/watchdog/bcm2835_wdt.c @@ -202,10 +202,8 @@ static int bcm2835_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(&bcm2835_wdt_wdd); err = devm_watchdog_register_device(dev, &bcm2835_wdt_wdd); - if (err) { - dev_err(dev, "Failed to register watchdog device"); + if (err) return err; - } if (pm_power_off == NULL) { pm_power_off = bcm2835_power_off; @@ -240,6 +238,7 @@ module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +MODULE_ALIAS("platform:bcm2835-wdt"); MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>"); MODULE_DESCRIPTION("Driver for Broadcom BCM2835 watchdog timer"); MODULE_LICENSE("GPL"); diff --git a/drivers/watchdog/bcm7038_wdt.c b/drivers/watchdog/bcm7038_wdt.c index d3d88f6703d7..979caa18d3c8 100644 --- a/drivers/watchdog/bcm7038_wdt.c +++ b/drivers/watchdog/bcm7038_wdt.c @@ -159,10 +159,8 @@ static int bcm7038_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(&wdt->wdd); watchdog_stop_on_unregister(&wdt->wdd); err = devm_watchdog_register_device(dev, &wdt->wdd); - if (err) { - dev_err(dev, "Failed to register watchdog device\n"); + if (err) return err; - } dev_info(dev, "Registered BCM7038 Watchdog\n"); diff --git a/drivers/watchdog/bcm_kona_wdt.c b/drivers/watchdog/bcm_kona_wdt.c index 921291025680..eb850a8d19df 100644 --- a/drivers/watchdog/bcm_kona_wdt.c +++ b/drivers/watchdog/bcm_kona_wdt.c @@ -301,10 +301,8 @@ static int bcm_kona_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(&bcm_kona_wdt_wdd); watchdog_stop_on_unregister(&bcm_kona_wdt_wdd); ret = devm_watchdog_register_device(dev, &bcm_kona_wdt_wdd); - if (ret) { - dev_err(dev, "Failed to register watchdog device"); + if (ret) return ret; - } bcm_kona_wdt_debug_init(pdev); dev_dbg(dev, "Broadcom Kona Watchdog Timer"); diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c index a22f2d431a35..f8d4e91d0383 100644 --- a/drivers/watchdog/cadence_wdt.c +++ b/drivers/watchdog/cadence_wdt.c @@ -363,10 +363,8 @@ static int cdns_wdt_probe(struct platform_device *pdev) watchdog_stop_on_reboot(cdns_wdt_device); watchdog_stop_on_unregister(cdns_wdt_device); ret = devm_watchdog_register_device(dev, cdns_wdt_device); - if (ret) { - dev_err(dev, "Failed to register wdt device\n"); + if (ret) return ret; - } platform_set_drvdata(pdev, wdt); dev_info(dev, "Xilinx Watchdog Timer at %p with timeout %ds%s\n", diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c index a2feef1ff307..d708c091bf1b 100644 --- a/drivers/watchdog/da9052_wdt.c +++ b/drivers/watchdog/da9052_wdt.c @@ -176,14 +176,7 @@ static int da9052_wdt_probe(struct platform_device *pdev) return ret; } - ret = devm_watchdog_register_device(dev, &driver_data->wdt); - if (ret != 0) { - dev_err(da9052->dev, "watchdog_register_device() failed: %d\n", - ret); - return ret; - } - - return ret; + return devm_watchdog_register_device(dev, &driver_data->wdt); } static struct platform_driver da9052_wdt_driver = { diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c index aac749cfaccb..e149e66a6ea9 100644 --- a/drivers/watchdog/da9062_wdt.c +++ b/drivers/watchdog/da9062_wdt.c @@ -214,11 +214,8 @@ static int da9062_wdt_probe(struct platform_device *pdev) watchdog_set_drvdata(&wdt->wdtdev, wdt); ret = devm_watchdog_register_device(dev, &wdt->wdtdev); - if (ret < 0) { - dev_err(wdt->hw->dev, - "watchdog registration failed (%d)\n", ret); + if (ret < 0) return ret; - } return da9062_wdt_ping(&wdt->wdtdev); } diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c index 7b2ee35b5ffd..2b3f3cd382ef 100644 --- a/drivers/watchdog/davinci_wdt.c +++ b/drivers/watchdog/davinci_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * drivers/char/watchdog/davinci_wdt.c * @@ -5,10 +6,7 @@ * * Copyright (C) 2006-2013 Texas Instruments. * - * 2007 (c) MontaVista Software, Inc. 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. + * 2007 (c) MontaVista Software, Inc. */ #include <linux/module.h> @@ -247,13 +245,7 @@ static int davinci_wdt_probe(struct platform_device *pdev) if (IS_ERR(davinci_wdt->base)) return PTR_ERR(davinci_wdt->base); - ret = devm_watchdog_register_device(dev, wdd); - if (ret) { - dev_err(dev, "cannot register watchdog device\n"); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, wdd); } static const struct of_device_id davinci_wdt_of_match[] = { diff --git a/drivers/watchdog/digicolor_wdt.c b/drivers/watchdog/digicolor_wdt.c index 8af6e9a67d0d..073d37867f47 100644 --- a/drivers/watchdog/digicolor_wdt.c +++ b/drivers/watchdog/digicolor_wdt.c @@ -118,7 +118,6 @@ static int dc_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dc_wdt *wdt; - int ret; wdt = devm_kzalloc(dev, sizeof(struct dc_wdt), GFP_KERNEL); if (!wdt) @@ -141,13 +140,7 @@ static int dc_wdt_probe(struct platform_device *pdev) watchdog_set_restart_priority(&dc_wdt_wdd, 128); watchdog_init_timeout(&dc_wdt_wdd, timeout, dev); watchdog_stop_on_reboot(&dc_wdt_wdd); - ret = devm_watchdog_register_device(dev, &dc_wdt_wdd); - if (ret) { - dev_err(dev, "Failed to register watchdog device"); - return ret; - } - - return 0; + return devm_watchdog_register_device(dev, &dc_wdt_wdd); } static const struct of_device_id dc_wdt_of_match[] = { diff --git a/drivers/watchdog/ebc-c384_wdt.c b/drivers/watchdog/ebc-c384_wdt.c index c176f59fea28..8ef4b0df3855 100644 --- a/drivers/watchdog/ebc-c384_wdt.c +++ b/drivers/watchdog/ebc-c384_wdt.c @@ -2,15 +2,6 @@ /* * Watchdog timer driver for the WinSystems EBC-C384 * Copyright (C) 2016 William Breathitt Gray - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2, as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. */ #include <linux/device.h> #include <linux/dmi.h> diff --git a/drivers/watchdog/eurotechwdt.c b/drivers/watchdog/eurotechwdt.c index 89129e6fa9b6..3a83a48abcae 100644 --- a/ |