diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-13 15:43:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-13 15:43:50 -0700 |
| commit | 41531f58a6513b86f8f379117eca82502022b4a9 (patch) | |
| tree | 18d69ef03890d23e6b7d379467ea6cf07f377bfe | |
| parent | 80a17a5f501ea048d86f81d629c94062b76610d4 (diff) | |
| parent | 1991a55dc87e8f2557bc90d7f0062b7110ab8437 (diff) | |
Merge tag 'linux-watchdog-4.17-rc1' of git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck:
- Add Nuvoton NPCM watchdog driver
- renesas_wdt: Add R-Car Gen2 support
- renesas_wdt: add suspend/resume and restart handler support
- hpwdt: convert to watchdog core and improve NMI
- improve timeout setting/handling in various drivers
- coh901327: make license text and module licence match
- fix error handling in asm9260_wdt, sprd_wdt and davinci_wdt
- aspeed imrovements
- dw improvements (for control register & suspend/resume)
- add SPDX identifiers for watchdog subsystem
* tag 'linux-watchdog-4.17-rc1' of git://www.linux-watchdog.org/linux-watchdog: (35 commits)
watchdog: davinci_wdt: fix error handling in davinci_wdt_probe()
watchdog: add SPDX identifiers for watchdog subsystem
watchdog: aspeed: Allow configuring for alternate boot
watchdog: Add Nuvoton NPCM watchdog driver
dt-bindings: watchdog: Add Nuvoton NPCM description
watchdog: dw: save/restore control and timeout across suspend/resume
watchdog: dw: RMW the control register
watchdog: sprd_wdt: Fix error handling in sprd_wdt_enable()
watchdog: aspeed: Fix translation of reset mode to ctrl register
watchdog: renesas_wdt: Add restart handler
watchdog: renesas_wdt: Add R-Car Gen2 support
watchdog: renesas_wdt: Add suspend/resume support
watchdog: f71808e_wdt: Fix WD_EN register read
watchdog: hpwdt: Update driver version.
watchdog: hpwdt: Add dynamic debug
watchdog: hpwdt: Programable Pretimeout NMI
watchdog: hpwdt: remove allow_kdump module parameter.
watchdog: hpwdt: condition early return of NMI handler on iLO5
watchdog: hpwdt: Modify to use watchdog core.
watchdog: hpwdt: Update nmi_panic message.
...
55 files changed, 628 insertions, 456 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt index 107280ef0025..adc6b76fcb3a 100644 --- a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt @@ -11,6 +11,7 @@ Optional properties: detail please see: Documentation/devicetree/bindings/regmap/regmap.txt. - fsl,ext-reset-output: If present the watchdog device is configured to assert its external reset (WDOG_B) instead of issuing a software reset. +- timeout-sec : Contains the watchdog timeout in seconds Examples: @@ -19,4 +20,5 @@ wdt@73f98000 { reg = <0x73f98000 0x4000>; interrupts = <58>; big-endian; + timeout-sec = <20>; }; diff --git a/Documentation/devicetree/bindings/watchdog/meson-wdt.txt b/Documentation/devicetree/bindings/watchdog/meson-wdt.txt index 8a6d84cb36c9..7588cc3971bf 100644 --- a/Documentation/devicetree/bindings/watchdog/meson-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/meson-wdt.txt @@ -9,9 +9,13 @@ Required properties: "amlogic,meson8m2-wdt" and "amlogic,meson8b-wdt" on Meson8m2 SoCs - reg : Specifies base physical address and size of the registers. +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + Example: wdt: watchdog@c1109900 { compatible = "amlogic,meson6-wdt"; reg = <0xc1109900 0x8>; + timeout-sec = <10>; }; diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt index 5b38a30e608c..859dee167b91 100644 --- a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt @@ -11,9 +11,13 @@ Required properties: - reg : Specifies base physical address and size of the registers. +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + Example: wdt: watchdog@10000000 { compatible = "mediatek,mt6589-wdt"; reg = <0x10000000 0x18>; + timeout-sec = <10>; }; diff --git a/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt new file mode 100644 index 000000000000..6d593003c933 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt @@ -0,0 +1,28 @@ +Nuvoton NPCM Watchdog + +Nuvoton NPCM timer module provides five 24-bit timer counters, and a watchdog. +The watchdog supports a pre-timeout interrupt that fires 10ms before the +expiry. + +Required properties: +- compatible : "nuvoton,npcm750-wdt" for NPCM750 (Poleg). +- reg : Offset and length of the register set for the device. +- interrupts : Contain the timer interrupt with flags for + falling edge. + +Required clocking property, have to be one of: +- clocks : phandle of timer reference clock. +- clock-frequency : The frequency in Hz of the clock that drives the NPCM7xx + timer (usually 25000000). + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + +timer@f000801c { + compatible = "nuvoton,npcm750-wdt"; + interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>; + reg = <0xf000801c 0x4>; + clocks = <&clk NPCM7XX_CLK_TIMER>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt index 9cbc76c89b2b..0dce5e3100b4 100644 --- a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt @@ -5,10 +5,14 @@ Required properties: - reg: Address range of tick timer/WDT register set - interrupts: interrupt number to the cpu +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds + Example: timer@b0020000 { compatible = "sirf,prima2-tick"; reg = <0xb0020000 0x1000>; interrupts = <0>; + timeout-sec = <30>; }; diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt index 04fc368d828f..ed11ce0ac836 100644 --- a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt @@ -8,9 +8,13 @@ Required properties: "allwinner,sun50i-a64-wdt","allwinner,sun6i-a31-wdt" - reg : Specifies base physical address and size of the registers. +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds + Example: wdt: watchdog@1c20c90 { compatible = "allwinner,sun4i-a10-wdt"; reg = <0x01c20c90 0x10>; + timeout-sec = <10>; }; diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 66a7f5a2f474..9af07fd92763 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -514,6 +514,17 @@ config COH901327_WATCHDOG This watchdog is used to reset the system and thus cannot be compiled as a module. +config NPCM7XX_WATCHDOG + bool "Nuvoton NPCM750 watchdog" + depends on ARCH_NPCM || COMPILE_TEST + default y if ARCH_NPCM750 + select WATCHDOG_CORE + help + Say Y here to include Watchdog timer support for the + watchdog embedded into the NPCM7xx. + This watchdog is used to reset the system and thus cannot be + compiled as a module. + config TWL4030_WATCHDOG tristate "TWL4030 Watchdog" depends on TWL4030_CORE @@ -1102,6 +1113,7 @@ config IT87_WDT config HP_WATCHDOG tristate "HP ProLiant iLO2+ Hardware Watchdog Timer" + select WATCHDOG_CORE depends on X86 && PCI help A software monitoring watchdog and NMI sourcing driver. This driver diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index e4dd91f5585a..1d3c6b094fe5 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o obj-$(CONFIG_SUNXI_WATCHDOG) += sunxi_wdt.o obj-$(CONFIG_RN5T618_WATCHDOG) += rn5t618_wdt.o obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o +obj-$(CONFIG_NPCM7XX_WATCHDOG) += npcm_wdt.o obj-$(CONFIG_STMP3XXX_RTC_WATCHDOG) += stmp3xxx_rtc_wdt.o obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o obj-$(CONFIG_TS4800_WATCHDOG) += ts4800_wdt.o diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c index 6d5ae251e309..ee1ab12ab04f 100644 --- a/drivers/watchdog/ar7_wdt.c +++ b/drivers/watchdog/ar7_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * drivers/watchdog/ar7_wdt.c * @@ -8,19 +9,6 @@ * National Semiconductor SCx200 Watchdog support * Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com> * - * 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. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/asm9260_wdt.c b/drivers/watchdog/asm9260_wdt.c index 7dd0da644a7f..2cf56b459d84 100644 --- a/drivers/watchdog/asm9260_wdt.c +++ b/drivers/watchdog/asm9260_wdt.c @@ -292,14 +292,14 @@ static int asm9260_wdt_probe(struct platform_device *pdev) if (IS_ERR(priv->iobase)) return PTR_ERR(priv->iobase); - ret = asm9260_wdt_get_dt_clks(priv); - if (ret) - return ret; - priv->rst = devm_reset_control_get_exclusive(&pdev->dev, "wdt_rst"); if (IS_ERR(priv->rst)) return PTR_ERR(priv->rst); + ret = asm9260_wdt_get_dt_clks(priv); + if (ret) + return ret; + wdd = &priv->wdd; wdd->info = &asm9260_wdt_ident; wdd->ops = &asm9260_wdt_ops; diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index ca5b91e2eb92..a5b8eb21201f 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -46,6 +46,7 @@ MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table); #define WDT_RELOAD_VALUE 0x04 #define WDT_RESTART 0x08 #define WDT_CTRL 0x0C +#define WDT_CTRL_BOOT_SECONDARY BIT(7) #define WDT_CTRL_RESET_MODE_SOC (0x00 << 5) #define WDT_CTRL_RESET_MODE_FULL_CHIP (0x01 << 5) #define WDT_CTRL_RESET_MODE_ARM_CPU (0x10 << 5) @@ -158,6 +159,7 @@ static int aspeed_wdt_restart(struct watchdog_device *wdd, { struct aspeed_wdt *wdt = to_aspeed_wdt(wdd); + wdt->ctrl &= ~WDT_CTRL_BOOT_SECONDARY; aspeed_wdt_enable(wdt, 128 * WDT_RATE_1MHZ / 1000); mdelay(1000); @@ -232,16 +234,21 @@ static int aspeed_wdt_probe(struct platform_device *pdev) wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC | WDT_CTRL_RESET_SYSTEM; } else { if (!strcmp(reset_type, "cpu")) - wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU; + wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU | + WDT_CTRL_RESET_SYSTEM; else if (!strcmp(reset_type, "soc")) - wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC; + wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC | + WDT_CTRL_RESET_SYSTEM; else if (!strcmp(reset_type, "system")) - wdt->ctrl |= WDT_CTRL_RESET_SYSTEM; + wdt->ctrl |= WDT_CTRL_RESET_MODE_FULL_CHIP | + WDT_CTRL_RESET_SYSTEM; else if (strcmp(reset_type, "none")) return -EINVAL; } if (of_property_read_bool(np, "aspeed,external-signal")) wdt->ctrl |= WDT_CTRL_WDT_EXT; + if (of_property_read_bool(np, "aspeed,alt-boot")) + wdt->ctrl |= WDT_CTRL_BOOT_SECONDARY; if (readl(wdt->base + WDT_CTRL) & WDT_CTRL_ENABLE) { /* diff --git a/drivers/watchdog/at91rm9200_wdt.c b/drivers/watchdog/at91rm9200_wdt.c index e12a797cb820..b45fc0aee667 100644 --- a/drivers/watchdog/at91rm9200_wdt.c +++ b/drivers/watchdog/at91rm9200_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for Atmel AT91RM9200 (Thunder) * * Copyright (C) 2003 SAN People (Pty) Ltd * - * 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. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index 88c05d0448b2..f4050a229eb5 100644 --- a/drivers/watchdog/at91sam9_wdt.c +++ b/drivers/watchdog/at91sam9_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for Atmel AT91SAM9x processors. * * Copyright (C) 2008 Renaud CERRATO r.cerrato@til-technologies.fr * - * 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. */ /* diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h index b79a83b467ce..390941c65eee 100644 --- a/drivers/watchdog/at91sam9_wdt.h +++ b/drivers/watchdog/at91sam9_wdt.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * drivers/watchdog/at91sam9_wdt.h * @@ -7,10 +8,6 @@ * Watchdog Timer (WDT) - System peripherals regsters. * Based on AT91SAM9261 datasheet revision D. * - * 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. */ #ifndef AT91_WDT_H diff --git a/drivers/watchdog/bcm2835_wdt.c b/drivers/watchdog/bcm2835_wdt.c index b339e0e67b4c..ed05514cc2dc 100644 --- a/drivers/watchdog/bcm2835_wdt.c +++ b/drivers/watchdog/bcm2835_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for Broadcom BCM2835 * @@ -7,10 +8,6 @@ * * Copyright (C) 2013 Lubomir Rintel <lkundrak@v3.sk> * - * 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. */ #include <linux/delay.h> diff --git a/drivers/watchdog/bcm47xx_wdt.c b/drivers/watchdog/bcm47xx_wdt.c index f41b756d6dd5..05425c1dfd4c 100644 --- a/drivers/watchdog/bcm47xx_wdt.c +++ b/drivers/watchdog/bcm47xx_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for Broadcom BCM47XX * @@ -5,10 +6,6 @@ * Copyright (C) 2009 Matthieu CASTET <castet.matthieu@free.fr> * Copyright (C) 2012-2013 Hauke Mehrtens <hauke@hauke-m.de> * - * 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. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/bcm63xx_wdt.c b/drivers/watchdog/bcm63xx_wdt.c index 8555afc70f9b..d3c1113e774c 100644 --- a/drivers/watchdog/bcm63xx_wdt.c +++ b/drivers/watchdog/bcm63xx_wdt.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Broadcom BCM63xx SoC watchdog driver * * Copyright (C) 2007, Miguel Gaio <miguel.gaio@efixo.com> * Copyright (C) 2008, Florian Fainelli <florian@openwrt.org> * - * 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. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/watchdog/bcm7038_wdt.c b/drivers/watchdog/bcm7038_wdt.c index f88f546e8050..ce3f646e8077 100644 --- a/drivers/watchdog/bcm7038_wdt.c +++ b/drivers/watchdog/bcm7038_wdt.c @@ -1,15 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2015 Broadcom Corporation * - * 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. - * - * 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/clk.h> @@ -235,6 +227,6 @@ module_platform_driver(bcm7038_wdt_driver); module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); -MODULE_LICENSE("GPL v2"); +MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Driver for Broadcom 7038 SoCs Watchdog"); MODULE_AUTHOR("Justin Chen"); diff --git a/drivers/watchdog/bcm_kona_wdt.c b/drivers/watchdog/bcm_kona_wdt.c index a5775dfd8d5f..1462be9e6fc5 100644 --- a/drivers/watchdog/bcm_kona_wdt.c +++ b/drivers/watchdog/bcm_kona_wdt.c @@ -1,14 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2013 Broadcom Corporation * - * 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 version 2. - * - * This program is distributed "as is" WITHOUT ANY WARRANTY of any - * kind, whether express or implied; without even the implied warranty - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/debugfs.h> diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c index 064cf7b6c1c5..3ec1f418837d 100644 --- a/drivers/watchdog/cadence_wdt.c +++ b/drivers/watchdog/cadence_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Cadence WDT driver - Used by Xilinx Zynq * * Copyright (C) 2010 - 2014 Xilinx, Inc. * - * 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. */ #include <linux/clk.h> diff --git a/drivers/watchdog/coh901327_wdt.c b/drivers/watchdog/coh901327_wdt.c index 4410337f4f7f..e3a78f927f83 100644 --- a/drivers/watchdog/coh901327_wdt.c +++ b/drivers/watchdog/coh901327_wdt.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * coh901327_wdt.c * * Copyright (C) 2008-2009 ST-Ericsson AB - * License terms: GNU General Public License (GPL) version 2 * Watchdog driver for the ST-Ericsson AB COH 901 327 IP core * Author: Linus Walleij <linus.walleij@stericsson.com> */ @@ -67,7 +67,9 @@ #define U300_WDOG_IFR_WILL_BARK_IRQ_FORCE_ENABLE 0x0001U /* Default timeout in seconds = 1 minute */ -static unsigned int margin = 60; +#define U300_WDOG_DEFAULT_TIMEOUT 60 + +static unsigned int margin; static int irq; static void __iomem *virtbase; static struct device *parent; @@ -235,8 +237,9 @@ static struct watchdog_device coh901327_wdt = { * timeout register is max * 0x7FFF = 327670ms ~= 327s. */ - .min_timeout = 0, + .min_timeout = 1, .max_timeout = 327, + .timeout = U300_WDOG_DEFAULT_TIMEOUT, }; static int __exit coh901327_remove(struct platform_device *pdev) @@ -315,16 +318,15 @@ static int __init coh901327_probe(struct platform_device *pdev) goto out_no_irq; } - ret = watchdog_init_timeout(&coh901327_wdt, margin, dev); - if (ret < 0) - coh901327_wdt.timeout = 60; + watchdog_init_timeout(&coh901327_wdt, margin, dev); coh901327_wdt.parent = dev; ret = watchdog_register_device(&coh901327_wdt); if (ret) goto out_no_wdog; - dev_info(dev, "initialized. timer margin=%d sec\n", margin); + dev_info(dev, "initialized. (timeout=%d sec)\n", + coh901327_wdt.timeout); return 0; out_no_wdog: @@ -419,5 +421,5 @@ MODULE_DESCRIPTION("COH 901 327 Watchdog"); module_param(margin, uint, 0); MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)"); -MODULE_LICENSE("GPL"); +MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:coh901327-watchdog"); diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c index d6d5006efa71..e263bad99574 100644 --- a/drivers/watchdog/da9052_wdt.c +++ b/drivers/watchdog/da9052_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * System monitoring driver for DA9052 PMICs. * @@ -5,11 +6,6 @@ * * Author: Anthony Olech <Anthony.Olech@diasemi.com> * - * 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. - * */ #include <linux/module.h> diff --git a/drivers/watchdog/da9055_wdt.c b/drivers/watchdog/da9055_wdt.c index 50bdd1022186..26a5b2984094 100644 --- a/drivers/watchdog/da9055_wdt.c +++ b/drivers/watchdog/da9055_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * System monitoring driver for DA9055 PMICs. * @@ -5,11 +6,6 @@ * * Author: David Dajun Chen <dchen@diasemi.com> * - * 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. - * */ #include <linux/module.h> diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c index 814dff6045a4..a001782bbfdb 100644 --- a/drivers/watchdog/da9062_wdt.c +++ b/drivers/watchdog/da9062_wdt.c @@ -1,16 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog device driver for DA9062 and DA9061 PMICs * Copyright (C) 2015 Dialog Semiconductor Ltd. * - * 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. - * - * 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/kernel.h> diff --git a/drivers/watchdog/da9063_wdt.c b/drivers/watchdog/da9063_wdt.c index 2a20fc163ed0..b17ac1bb1f28 100644 --- a/drivers/watchdog/da9063_wdt.c +++ b/drivers/watchdog/da9063_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for DA9063 PMICs. * @@ -5,10 +6,6 @@ * * Author: Mariusz Wojtasik <mariusz.wojtasik@diasemi.com> * - * 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. */ #include <linux/kernel.h> diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c index 3e4c592c239f..6c6594261cb7 100644 --- a/drivers/watchdog/davinci_wdt.c +++ b/drivers/watchdog/davinci_wdt.c @@ -236,15 +236,22 @@ static int davinci_wdt_probe(struct platform_device *pdev) wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); davinci_wdt->base = devm_ioremap_resource(dev, wdt_mem); - if (IS_ERR(davinci_wdt->base)) - return PTR_ERR(davinci_wdt->base); + if (IS_ERR(davinci_wdt->base)) { + ret = PTR_ERR(davinci_wdt->base); + goto err_clk_disable; + } ret = watchdog_register_device(wdd); - if (ret < 0) { - clk_disable_unprepare(davinci_wdt->clk); + if (ret) { dev_err(dev, "cannot register watchdog device\n"); + goto err_clk_disable; } + return 0; + +err_clk_disable: + clk_disable_unprepare(davinci_wdt->clk); + return ret; } diff --git a/drivers/watchdog/digicolor_wdt.c b/drivers/watchdog/digicolor_wdt.c index 5e4ef93caa02..a9e11df155b8 100644 --- a/drivers/watchdog/digicolor_wdt.c +++ b/drivers/watchdog/digicolor_wdt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for Conexant Digicolor * * Copyright (C) 2015 Paradox Innovation Ltd. * - * 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. */ #include <linux/types.h> diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c index c2f4ff516230..501aebb5b81f 100644 --- a/drivers/watchdog/dw_wdt.c +++ b/drivers/watchdog/dw_wdt.c @@ -34,6 +34,7 @@ #define WDOG_CONTROL_REG_OFFSET 0x00 #define WDOG_CONTROL_REG_WDT_EN_MASK 0x01 +#define WDOG_CONTROL_REG_RESP_MODE_MASK 0x02 #define WDOG_TIMEOUT_RANGE_REG_OFFSET 0x04 #define WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT 4 #define WDOG_CURRENT_COUNT_REG_OFFSET 0x08 @@ -56,6 +57,9 @@ struct dw_wdt { unsigned long rate; struct watchdog_device wdd; struct reset_control *rst; + /* Save/restore */ + u32 control; + u32 timeout; }; #define to_dw_wdt(wdd) container_of(wdd, struct dw_wdt, wdd) @@ -121,14 +125,23 @@ static int dw_wdt_set_timeout(struct watchdog_device *wdd, unsigned int top_s) return 0; } +static void dw_wdt_arm_system_reset(struct dw_wdt *dw_wdt) +{ + u32 val = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + + /* Disable interrupt mode; always perform system reset. */ + val &= ~WDOG_CONTROL_REG_RESP_MODE_MASK; + /* Enable watchdog. */ + val |= WDOG_CONTROL_REG_WDT_EN_MASK; + writel(val, dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); +} + static int dw_wdt_start(struct watchdog_device *wdd) { struct dw_wdt *dw_wdt = to_dw_wdt(wdd); dw_wdt_set_timeout(wdd, wdd->timeout); - - writel(WDOG_CONTROL_REG_WDT_EN_MASK, - dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_arm_system_reset(dw_wdt); return 0; } @@ -152,16 +165,13 @@ static int dw_wdt_restart(struct watchdog_device *wdd, unsigned long action, void *data) { struct dw_wdt *dw_wdt = to_dw_wdt(wdd); - u32 val; writel(0, dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET); - val = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); - if (val & WDOG_CONTROL_REG_WDT_EN_MASK) + if (dw_wdt_is_enabled(dw_wdt)) writel(WDOG_COUNTER_RESTART_KICK_VALUE, dw_wdt->regs + WDOG_COUNTER_RESTART_REG_OFFSET); else - writel(WDOG_CONTROL_REG_WDT_EN_MASK, - dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_arm_system_reset(dw_wdt); /* wait for reset to assert... */ mdelay(500); @@ -198,6 +208,9 @@ static int dw_wdt_suspend(struct device *dev) { struct dw_wdt *dw_wdt = dev_get_drvdata(dev); + dw_wdt->control = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt->timeout = readl(dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET); + clk_disable_unprepare(dw_wdt->clk); return 0; @@ -211,6 +224,9 @@ static int dw_wdt_resume(struct device *dev) if (err) return err; + writel(dw_wdt->timeout, dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET); + writel(dw_wdt->control, dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_ping(&dw_wdt->wdd); return 0; diff --git a/drivers/watchdog/ebc-c384_wdt.c b/drivers/watchdog/ebc-c384_wdt.c index 2170b275ea01..4c4c8ce78021 100644 --- a/drivers/watchdog/ebc-c384_wdt.c +++ b/drivers/watchdog/ebc-c384_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Watchdog timer driver for the WinSystems EBC-C384 * Copyright (C) 2016 William Breathitt Gray diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c index 3a33c5344bd5..9a1c761258ce 100644 --- a/drivers/watchdog/f71808e_wdt.c +++ b/drivers/watchdog/f71808e_wdt.c @@ -496,7 +496,7 @@ static bool watchdog_is_running(void) is_running = (superio_inb(watchdog.sioaddr, SIO_REG_ENABLE) & BIT(0)) && (superio_inb(watchdog.sioaddr, F71808FG_REG_WDT_CONF) - & F71808FG_FLAG_WD_EN); + & BIT(F71808FG_FLAG_WD_EN)); superio_exit(watchdog.sioaddr); diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c index 3ade28190341..ea77cae03c9d 100644 --- a/drivers/watchdog/gpio_wdt.c +++ b/drivers/watchdog/gpio_wdt.c @@ -152,9 +152,9 @@ static int gpio_wdt_probe(struct platform_device *pdev) priv->wdd.min_timeout = SOFT_TIMEOUT_MIN; priv->wdd.max_hw_heartbeat_ms = hw_margin; priv->wdd.parent = dev; + priv->wdd.timeout = SOFT_TIMEOUT_DEF; - if (watchdog_init_timeout(&priv->wdd, 0, dev) < 0) - priv->wdd.timeout = SOFT_TIMEOUT_DEF; + watchdog_init_timeout(&priv->wdd, 0, &pdev->dev); watchdog_stop_on_reboot(&priv->wdd); diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index b0a158073abd..a43ab2cecca2 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -4,7 +4,7 @@ * * SoftDog 0.05: A Software Watchdog Device * - * (c) Copyright 2015 Hewlett Packard Enterprise Development LP + * (c) Copyright 2018 Hewlett Packard Enterprise Development LP * Thomas Mingarelli <thomas.mingarelli@hpe.com> * * This program is free software; you can redistribute it and/or @@ -16,34 +16,27 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/device.h> -#include <linux/fs.h> #include <linux/io.h> -#include <linux/bitops.h> #include <linux/kernel.h> -#include <linux/miscdevice.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/types.h> -#include <linux/uaccess.h> #include <linux/watchdog.h> #include <asm/nmi.h> -#define HPWDT_VERSION "1.4.0" +#define HPWDT_VERSION "2.0.0" #define SECS_TO_TICKS(secs) ((secs) * 1000 / 128) #define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000) #define HPWDT_MAX_TIMER TICKS_TO_SECS(65535) #define DEFAULT_MARGIN 30 +#define PRETIMEOUT_SEC 9 +static bool ilo5; static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */ -static unsigned int reload; /* the computed soft_margin */ static bool nowayout = WATCHDOG_NOWAYOUT; -#ifdef CONFIG_HPWDT_NMI_DECODING -static unsigned int allow_kdump = 1; -#endif -static char expect_release; -static unsigned long hpwdt_is_open; +static bool pretimeout = IS_ENABLED(CONFIG_HPWDT_NMI_DECODING); static void __iomem *pci_mem_addr; /* the PCI-memory address */ static unsigned long __iomem *hpwdt_nmistat; @@ -61,48 +54,92 @@ MODULE_DEVICE_TABLE(pci, hpwdt_devices); /* * Watchdog operations */ -static void hpwdt_start(void) +static int hpwdt_start(struct watchdog_device *wdd) { - reload = SECS_TO_TICKS(soft_margin); + int control = 0x81 | (pretimeout ? 0x4 : 0); + int reload = SECS_TO_TICKS(wdd->timeout); + + dev_dbg(wdd->parent, "start watchdog 0x%08x:0x%02x\n", reload, control); iowrite16(reload, hpwdt_timer_reg); - iowrite8(0x85, hpwdt_timer_con); + iowrite8(control, hpwdt_timer_con); + + return 0; } static void hpwdt_stop(void) { unsigned long data; + pr_debug("stop watchdog\n"); + data = ioread8(hpwdt_timer_con); data &= 0xFE; iowrite8(data, hpwdt_timer_con); } -static void hpwdt_ping(void) +static int hpwdt_stop_core(struct watchdog_device *wdd) { - iowrite16(reload, hpwdt_timer_reg); + hpwdt_stop(); + + return 0; } -static int hpwdt_change_timer(int new_margin) +static int hpwdt_ping(struct watchdog_device *wdd) { - if (new_margin < 1 || new_margin > HPWDT_MAX_TIMER) { - pr_warn("New value passed in is invalid: %d seconds\n", - new_margin); - return -EINVAL; - } + int reload = SECS_TO_TICKS(wdd->timeout); - soft_margin = new_margin; - pr_debug("New timer passed in is %d seconds\n", new_margin); - reload = SECS_TO_TICKS(soft_margin); + dev_dbg(wdd->parent, "ping watchdog 0x%08x\n", reload); + iowrite16(reload, hpwdt_timer_reg); return 0; } -static int hpwdt_time_left(void) +static unsigned int hpwdt_gettimeleft(struct watchdog_device *wdd) { return TICKS_TO_SECS(ioread16(hpwdt_timer_reg)); } +static int hpwdt_settimeout(struct watchdog_device *wdd, unsigned int val) +{ + dev_dbg(wdd->parent, "set_timeout = %d\n", val); + + wdd->timeout = val; + if (val <= wdd->pretimeout) { + dev_dbg(wdd->parent, "pretimeout < timeout. Setting to zero\n"); + wdd->pretimeout = 0; + pretimeout = 0; + if (watchdog_active(wdd)) + hpwdt_start(wdd); + } + hpwdt_ping(wdd); + + return 0; +} + #ifdef CONFIG_HPWDT_NMI_DECODING +static int hpwdt_set_pretimeout(struct watchdog_device *wdd, unsigned int req) +{ + unsigned int val = 0; + + dev_dbg(wdd->parent, "set_pretimeout = %d\n", req); + if (req) { + val = PRETIMEOUT_SEC; + if (val >= wdd->timeout) + return -EINVAL; + } + + if (val != req) + dev_dbg(wdd->parent, "Rounding pretimeout to: %d\n", val); + + wdd->pretimeout = val; + pretimeout = !!val; + + if (watchdog_active(wdd)) + hpwdt_start(wdd); + + return 0; +} + static int hpwdt_my_nmi(void) { return ioread8(hpwdt_nmistat) & 0x6; @@ -113,178 +150,71 @@ static int hpwdt_my_nmi(void) */ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) { - if ((ulReason == NMI_UNKNOWN) && !hpwdt_my_nmi()) - return NMI_DONE; - - if (allow_kdump) - hpwdt_stop(); - - nmi_panic(regs, "An NMI occurred. Depending on your system the reason " - "for the NMI is logged in any one of the following " - "resources:\n" + unsigned int mynmi = hpwdt_my_nmi(); + static char panic_msg[] = + "00: An NMI occurred. Depending on your system the reason " + "for the NMI is logged in any one of the following resources:\n" "1. Integrated Management Log (IML)\n" "2. OA Syslog\n" "3. OA Forward Progress Log\n" - "4. iLO Event Log"); - - return NMI_HANDLED; -} -#endif /* CONFIG_HPWDT_NMI_DECODING */ - -/* - * /dev/watchdog handling - */ -static int hpwdt_open(struct inode *inode, struct file *file) -{ - /* /dev/watchdog can only be opened once */ - if (test_and_set_bit(0, &hpwdt_is_open)) - return -EBUSY; + "4. iLO Event Log"; - /* Start the watchdog */ - hpwdt_start(); - hpwdt_ping(); - - return nonseekable_open(inode, file); -} + if (ilo5 && ulReason == NMI_UNKNOWN && mynmi) + return NMI_DONE; -static int hpwdt_release(struct inode *inode, struct file *file) -{ - /* Stop the watchdog */ - if (expect_release == 42) { - hpwdt_stop(); - } else { - pr_crit("Unexpected close, not stopping watchdog!\n"); - hpwdt_ping(); - } + if (ilo5 && !pretimeout) + return NMI_DONE; - expect_release = 0; + hpwdt_stop(); - /* /dev/watchdog is being closed, make sure it can be re-opened */ - clear_bit(0, &hpwdt_is_open); + hex_byte_pack(panic_msg, mynmi); + nmi_panic(regs, panic_msg); - return 0; + return NMI_HANDLED; } +#endif /* CONFIG_HPWDT_NMI_DECODING */ -static ssize_t hpwdt_write(struct file *file, const char __user *data, - size_t len, loff_t *ppos) -{ - /* See if we got the magic character 'V' and reload the timer */ - if (len) { - if (!nowayout) { - size_t i; - - /* note: just in case someone wrote the magic character - * five months ago... */ - expect_release = 0; - - /* scan to see whether or not we got the magic char. */ - for (i = 0; i != len; i++) { - char c; - if (get_user(c, data + i)) - return -EFAULT; - if (c == 'V') - expect_release = 42; - } - } - - /* someone wrote to us, we should reload the timer */ - hpwdt_ping(); - } - - return len; -} static const struct watchdog_info ident = { - .options = WDIOF_SETTIMEOUT | + .options = WDIOF_PRETIMEOUT | + WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "HPE iLO2+ HW Watchdog Timer", }; -static long hpwdt_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - void __user *argp = (void __user *)arg; - int __user *p = argp; - int new_margin, options; - int ret = -ENOTTY; - - switch (cmd) { - case WDIOC_GETSUPPORT: - ret = 0; - if (copy_to_user(argp, &ident, sizeof(ident))) - ret = -EFAULT; - break; - - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - ret = put_user(0, p); - break; - - case WDIOC_KEEPALIVE: - hpwdt_ping(); - ret = 0; - break; - - case WDIOC_SETOPTIONS: - ret = get_user(options, p); - if (ret) - break; - - if (options & WDIOS_DISABLECARD) - hpwdt_stop(); - - if (options & WDIOS_ENABLECARD) { - hpwdt_start(); - hpwdt_ping(); - } - break; - - case WDIOC_SETTIMEOUT: - ret = get_user(new_margin, p); - if (ret) - break; - - ret = hpwdt_change_timer(new_margin); - if (ret) - break; - - hpwdt_ping(); - /* Fall */ - case WDIOC_GETTIMEOUT: - ret = put_user(soft_margin, p); - break; - - case WDIOC_GETTIMELEFT: - ret = put_user(hpwdt_time_left(), p); - break; - } - return ret; -} - /* * Kernel interfaces */ -static const struct file_operations hpwdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = hpwdt_write, - .unlocked_ioctl = hpwdt_ioctl, - .open = hpwdt_open, - .release = hpwdt_release, + +static const struct watchdog_ops hpwdt_ops = { + .owner = THIS_MODULE, + .start = hpwdt_start, + .stop = hpwdt_stop_core, + .ping = hpwdt_ping, + .set_timeout = hpwdt_settimeout, + .get_timeleft = hpwdt_gettimeleft, +#ifdef CONFIG_HPWDT_NMI_DECODING + .set_pretimeout = hpwdt_set_pretimeout, +#endif }; -static struct miscdevice hpwdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &hpwdt_fops, +static struct watchdog_device hpwdt_dev = { + .info = &ident, + .ops = &hpwdt_ops, + .min_timeout = 1, + .max_timeout = HPWDT_MAX_TIMER, + .timeout = DEFAULT_MARGIN, +#ifdef CONFIG_HPWDT_NMI_DECODING + .pretimeout = PRETIMEOUT_SEC, +#endif }; + /* * Init & Exit */ - static int hpwdt_init_nmi_decoding(struct pci_dev *dev) { #ifdef CONFIG_HPWDT_NMI_DECODING @@ -303,9 +233,8 @@ static int hpwdt_init_nmi_decoding(struct pci_dev *dev) goto error2; dev_info(&dev->dev, - "HPE Watchdog Timer Driver: NMI decoding initialized" - ", allow kernel dump: %s (default = 1/ON)\n", - (allow_kdump == 0) ? "OFF" : "ON"); + "HPE Watchdog Timer Driver: NMI decoding initialized\n"); + return 0; error2: @@ -375,29 +304,32 @@ static int hpwdt_init_one(struct pci_dev *dev, /* Make sure that timer is disabled until /dev/watchdog is opened */ hpwdt_stop(); - /* Make sure that we have a valid soft_margin */ - if (hpwdt_change_timer(soft_margin)) - hpwdt_change_timer(DEFAULT_MARGIN); - /* Initialize NMI Decoding functionality */ retval = hpwdt_init_nmi_decoding(dev); if (retval != 0) goto error_init_nmi_decoding; - retval = misc_register(&hpwdt_miscdev); + watchdog_set_nowayout(&hpwdt_dev, nowayout); + if (watchdog_init_timeout(&hpwdt_dev, soft_margin, NULL)) + dev_warn(&dev->dev, "Invalid soft_margin: %d.\n", soft_margin); + + hpwdt_dev.parent = &dev->dev; + retval = watchdog_register_device(&hpwdt_dev); if (retval < 0) { - dev_warn(&dev->dev, - "Unable to register miscdev on minor=%d (err=%d).\n", - WATCHDOG_MINOR, retval); - goto error_misc_register; + dev_err(&dev->dev, "watchdog register failed: %d.\n", retval); + goto error_wd_register; } dev_info(&dev->dev, "HPE Watchdog Timer Driver: %s" ", timer margin: %d seconds (nowayout=%d).\n", - HPWDT_VERSION, soft_margin, nowayout); + HPWDT_VERSION, hpwdt_dev.timeout, nowayout); + + if (dev->subsystem_vendor == PCI_VENDOR_ID_HP_3PAR) + ilo5 = true; + return 0; -error_misc_register: +error_wd_register: hpwdt_exit_nmi_decoding(); error_init_nmi_decoding: pci_iounmap(dev, pci_mem_addr); @@ -411,7 +343,7 @@ static void hpwdt_exit(struct pci_dev *dev) if (!nowayout) hpwdt_stop(); - misc_deregister(&hpwdt_miscdev); + watchdog_unregister_device(&hpwdt_dev); hpwdt_exit_nmi_decoding(); pci_iounmap(dev, pci_mem_addr); pci_disable_device(dev); @@ -425,7 +357,7 @@ static struct pci_driver hpwdt_driver = { }; MODULE_AUTHOR("Tom Mingarelli"); -MODULE_DESCRIPTION("hp watchdog driver"); +MODULE_DESCRIPTION("hpe watchdog driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(HPWDT_VERSION); @@ -437,8 +369,8 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); #ifdef CONFIG_HPWDT_NMI_DECODING -module_param(allow_kdump, int, 0); -MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs"); -#endif /* CONFIG_HPWDT_NMI_DECODING */ +module_param(pretimeout, bool, 0); +MODULE_PARM_DESC(pretimeout, "Watchdog pretimeout enabled"); +#endif module_pci_driver(hpwdt_driver); diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c index 518dfa1047cb..f07850d2c977 100644 --- a/drivers/watchdog/imx2_wdt.c +++ b/drivers/watchdog/imx2_wdt.c @@ -76,7 +76,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); -static unsigned timeout = IMX2_WDT_DEFAULT_TIME; +static unsigned timeout; module_param(timeout, uint, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default=" __MODULE_STRING(IMX2_WDT_DEFAULT_TIME) ")"); @@ -281,6 +281,7 @@ static int __init imx2_wdt_probe(struct platform_device *pdev) wdog->info = &imx2_wdt_info; wdog->ops = &imx2_wdt_ops; wdog->min_timeout = 1; + wdog->timeout = IMX2_WDT_DEFAULT_TIME; wdog->max_hw_heartbeat_ms = IMX2_WDT_MAX_TIME * 1000; wdog->parent = &pdev->dev; @@ -299,11 +300,6 @@ static int __init imx2_wdt_probe(struct platform_device *pdev) wdev->ext_reset = of_property_read_bool(pdev->dev.of_node, "fsl,ext-reset-output"); - wdog->timeout = clamp_t(unsigned, timeout, 1, IMX2_WDT_MAX_TIME); - if (wdog->timeout != timeout) - dev_warn(&pdev->dev, "Initial timeout out of range! Clamped from %u to %u\n", - timeout, wdog->timeout); - platform_set_drvdata(pdev, wdog); watchdog_set_drvdata(wdog, wdev); watchdog_set_nowayout(wdog, nowayout); diff --git a/drivers/watchdog/lpc18xx_wdt.c b/drivers/watchdog/lpc18xx_wdt.c index b4221f43cd94..331cadb459ac 100644 --- a/drivers/watchdog/lpc18xx_wdt.c +++ b/drivers/watchdog/lpc18xx_wdt.c @@ -265,7 +265,7 @@ static int lpc18xx_wdt_probe(struct platform_device *pdev) lpc18xx_wdt->wdt_dev.parent = dev; watchdog_set_drvdata(&lpc18xx_wdt->wdt_dev, lpc18xx_wdt); - ret = watchdog_init_timeout(&lpc18xx_wdt->wdt_dev, heartbeat, dev); + watchdog_init_timeout(&lpc18xx_wdt->wdt_dev, heartbeat, dev); __lpc18xx_wdt_set_timeout(lpc18xx_wdt); diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c index b8194b02abe0..8023cf28657a 100644 --- a/drivers/watchdog/mei_wdt.c +++ b/drivers/watchdog/mei_wdt.c @@ -1,15 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Intel Management Engine Interface (Intel MEI) Linux driver * Copyright (c) 2015, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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/module.h> @@ -687,5 +679,5 @@ static struct mei_cl_driver mei_wdt_driver = { module_mei_cl_driver(mei_wdt_driver); MODULE_AUTHOR("Intel Corporation"); -MODULE_LICENSE("GPL"); +MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Device driver for Intel MEI iAMT watchdog"); diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c index 045201a6fdb3..25d5d2b8cfbe 100644 --- a/drivers/watchdog/mena21_wdt.c +++ b/drivers/watchdog/mena21_wdt.c @@ -1,11 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for the A21 VME CPU Boards * * Copyright (C) 2013 MEN Mikro Elektronik Nuernberg GmbH * - * 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 */ #include <linux/module.h> #include <linux/moduleparam.h> diff --git a/drivers/watchdog/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c index 69a5a57f1446..69adeab3fde7 100644 --- a/drivers/watchdog/meson_gxbb_wdt.c +++ b/drivers/watchdog/meson_gxbb_wdt.c @@ -1,56 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* - * This file is provided under a dual BSD/GPLv2 license. When using or - * redistributing this file, you may do so under either license. - * - * GPL LICENSE SUMMARY - * * Copyright (c) 2016 BayLibre, SAS. * Author: Neil Armstrong <narmstrong@baylibre.com> * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. - * The full GNU General Public License is included in this distribution - * in the file called COPYING. - * - * BSD LICENSE - * - * Copyright (c) 2016 BayLibre, SAS. - * Author: Neil Armstrong <narmstrong@baylibre.com> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <linux/clk.h> #include <linux/err.h> diff --git a/drivers/watchdog/meson_wdt.c b/drivers/watchdog/meson_wdt.c index 304274c67735..cd0275a6cdac 100644 --- a/drivers/watchdog/meson_wdt.c +++ b/drivers/watchdog/meson_wdt.c @@ -36,7 +36,7 @@ #define MESON_SEC_TO_TC(s, c) ((s) * (c)) static bool nowayout = WATCHDOG_NOWAYOUT; -static unsigned int timeout = MESON_WDT_TIMEOUT; +static unsigned int timeout; struct meson_wdt_data { unsigned int enable; diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index 7ed417a765c7..4baf64f21aa1 100644 --- a/drivers/watchdog/mtk_wdt.c +++ b/drivers/watchdog/mtk_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Mediatek Watchdog Driver * @@ -5,16 +6,6 @@ * * Matthias Brugger <matthias.bgg@gmail.com> * - * 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. - * - * 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. - * * Based on sunxi_wdt.c */ @@ -57,7 +48,7 @@ #define DRV_VERSION "1.0" static bool nowayout = WATCHDOG_NOWAYOUT; -static unsigned int timeout = WDT_MAX_TIMEOUT; +static unsigned int timeout; struct mtk_wdt_dev { struct watchdog_device wdt_dev; diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c index ca360d204548..1fa7d2b32494 100644 --- a/drivers/watchdog/mtx-1_wdt.c +++ b/drivers/watchdog/mtx-1_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Driver for the MTX-1 Watchdog. * @@ -6,16 +7,6 @@ * http://www.4g-systems.biz * * (C) Copyright 2007 OpenWrt.org, Florian Fainelli <florian@openwrt.org> - * - * 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 Michael Stickel nor 4G Systems admit liability nor provide - * warranty for any of this software. This material is provided - * "AS-IS" and at no charge. - * * (c) Copyright 2005 4G Systems <info@4g-systems.biz> * * Release 0.01. diff --git a/drivers/watchdog/npcm_wdt.c b/drivers/watchdog/npcm_wdt.c new file mode 100644 index 000000000000..0d4213652ecc --- /dev/null +++ b/drivers/watchdog/npcm_wdt.c @@ -0,0 +1,254 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Nuvoton Technology corporation. +// Copyright (c) 2018 IBM Corp. + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/watchdog.h> + +#define NPCM_WTCR 0x1C + +#define NPCM_WTCLK (BIT(10) | BIT(11)) /* Clock divider */ +#define NPCM_WTE BIT(7) /* Enable */ +#define NPCM_WTIE BIT(6) /* Enable irq */ +#define NPCM_WTIS (BIT(4) | BIT(5)) /* Interval selection */ +#define NPCM_WTIF BIT(3) /* Interrupt flag*/ +#define NPCM_WTRF BIT(2) /* Reset flag */ +#define NPCM_WTRE BIT(1) /* Reset enable */ +#define NPCM_WTR BIT(0) /* Reset counter */ + +/* + * Watchdog timeouts + * + * 170 msec: WTCLK=01 WTIS=00 VAL= 0x400 + * 670 msec: WTCLK=01 WTIS=01 VAL= 0x410 + * 1360 msec: WTCLK=10 WTIS=00 VAL= 0x800 + * 2700 msec: WTCLK=01 WTIS=10 VAL= 0x420 + * 5360 msec: WTCLK=10 WTIS=01 VAL= 0x810 + * 10700 msec: WTCLK=01 WTIS=11 VAL= 0x430 + * 21600 msec: WTCLK=10 WTIS=10 VAL= 0x820 + * 43000 msec: WTCLK=11 WTIS=00 VAL= 0xC00 + * 85600 msec: WTCLK=10 WTIS=11 VAL= 0x830 + * 172000 msec: WTCLK=11 WTIS=01 VAL= 0xC10 + * 687000 msec: WTCLK=11 WTIS=10 VAL= 0xC20 + * 2750000 msec: WTCLK=11 WTIS=11 VAL= 0xC30 + */ + +struct npcm_wdt { + struct watchdog_device wdd; + void __iomem *reg; +}; + +static inline struct npcm_wdt *to_npcm_wdt(struct watchdog_device *wdd) +{ + return container_of(wdd, struct npcm_wdt, wdd); +} + +static int npcm_wdt_ping(struct watchdog_device *wdd) +{ + struct npcm_wdt *wdt = to_npcm_wdt(wdd); + u32 val; + + val = readl(wdt->reg); + writel(val | NPCM_WTR, wdt->reg); + + return 0; +} + +static int npcm_wdt_start(struct watchdog_device *wdd) +{ + struct npcm_wdt *wdt = to_npcm_wdt(wdd); + u32 val; + + if (wdd->timeout < 2) + val = 0x800; + else if (wdd->timeout < 3) + val = 0x420; + else if (wdd->timeout < 6) + val = 0x810; + else if (wdd->timeout < 11) + val = 0x430; + else if (wdd->timeout < 22) + val = 0x820; + else if (wdd->timeout < 44) + val = 0xC00; + else if (wdd->timeout < 87) + val = 0x830; + else if (wdd->timeout < 173) + val = 0xC10; + else if (wdd->timeout < 688) + val = 0xC20; + else + val = 0xC30; + + val |= NPCM_WTRE | NPCM_WTE | NPCM_WTR | NPCM_WTIE; + + writel(val, wdt->reg); + + return 0; +} + +static int npcm_wdt_stop(struct watchdog_device *wdd) +{ + struct npcm_wdt *wdt = to_npcm_wdt(wdd); + + writel(0, wdt->reg); + + return 0; +} + + +static int npcm_wdt_set_timeout(struct watchdog_device *wdd, + unsigned int timeout) +{ + if (timeout < 2) + wdd->timeout = 1; + else if (timeout < 3) + wdd->timeout = 2; + else if (timeout < 6) + wdd->timeout = 5; + else if (timeout < 11) + wdd->timeout = 10; + else if (timeout < 22) + wdd->timeout = 21; + else if (timeout < 44) + wdd->timeout = 43; + else if (timeout < 87) + wdd->timeout = 86; + else if (timeout < 173) + wdd->timeout = 172; + else if (timeout < 688) + wdd->timeout = 687; + else + wdd->timeout = 2750; + + if (watchdog_active(wdd)) + npcm_wdt_start(wdd); + + return 0; +} + +static irqreturn_t npcm_wdt_interrupt(int irq, void *data) +{ + struct npcm_wdt *wdt = data; + + watchdog_notify_pretimeout(&wdt->wdd); + + return IRQ_HANDLED; +} + +static int npcm_wdt_restart(struct watchdog_device *wdd, + unsigned long action, void *data) +{ + struct npcm_wdt *wdt = to_npcm_wdt(wdd); + + writel(NPCM_WTR | NPCM_WTRE | NPCM_WTE, wdt->reg); + udelay(1000); + + return 0; +} + +static bool npcm_is_running(struct watchdog_device *wdd) +{ + struct npcm_wdt *wdt = to_npcm_wdt(wdd); + + return readl(wdt->reg) & NPCM_WTE; +} + +static const struct watchdog_info npcm_wdt_info = { + .identity = KBUILD_MODNAME, + .options = WDIOF_SETTIMEOUT + | WDIOF_KEEPALIVEPING + | WDIOF_MAGICCLOSE, +}; + +static const struct watchdog_ops npcm_wdt_ops = { + .owner = THIS_MODULE, + .start = npcm_wdt_start, + .stop = npcm_wdt_stop, + .ping = npcm_wdt_ping, + .set_timeout = npcm_wdt_set_timeout, + .restart = npcm_wdt_restart, +}; + +static int npcm_wdt_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct npcm_wdt *wdt; + struct resource *res; + int irq; + int ret; + + wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL); + if (!wdt) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + wdt->reg = devm_ioremap_resource(dev, res); + if (IS_ERR(wdt->reg)) + return PTR_ERR(wdt->reg); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + wdt->wdd.info = &npcm_wdt_info; + wdt->wdd.ops = &npcm_wdt_ops; + wdt->wdd.min_timeout = 1; + wdt->wdd.max_timeout = 2750; + wdt->wdd.parent = dev; + + wdt->wdd.timeout = 86; + watchdog_init_timeout(&wdt->wdd, 0, dev); + + /* Ensure timeout is able to be represented by the hardware */ + npcm_wdt_set_timeout(&wdt->wdd, wdt->wdd.timeout); + + if (npcm_is_running(&wdt->wdd)) { + /* Restart with the default or device-tree specified timeout */ + npcm_wdt_start(&wdt->wdd); + set_bit(WDOG_HW_RUNNING, &wdt->wdd.status); + } + + ret = devm_request_irq(dev, irq, npcm_wdt_interrupt, 0, + "watchdog", wdt); + if (ret) + return ret; + + ret = devm_watchdog_register_device(dev, &wdt->wdd); + if (ret) { + dev_err(dev, "failed to register watchdog\n"); + return ret; + } + + dev_info(dev, "NPCM watchdog driver enabled\n"); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id npcm_wdt_match[] = { + {.compatible = "nuvoton,npcm750-wdt"}, + {}, +}; +MODULE_DEVICE_TABLE(of, npcm_wdt_match); +#endif + +static struct platform_driver npcm_wdt_driver = { + .probe = npcm_wdt_probe, + .driver = { + .name = "npcm-wdt", + .of_match_table = of_match_ptr(npcm_wdt_match), + }, +}; +module_platform_driver(npcm_wdt_driver); + +MODULE_AUTHOR("Joel Stanley"); +MODULE_DESCRIPTION("Watchdog driver for NPCM"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c index 1cf286945b7a..4acbe05e27bb 100644 --- a/drivers/watchdog/of_xilinx_wdt.c +++ b/drivers/watchdog/of_xilinx_wdt.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog Device Driver for Xilinx axi/xps_timebase_wdt * * (C) Copyright 2013 - 2014 Xilinx, Inc. * (C) Copyright 2011 (Alejandro Cabrera <aldaya@gmail.com>) - * - * 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. */ #include <linux/clk.h> @@ -323,4 +319,4 @@ module_platform_driver(xwdt_driver); MODULE_AUTHOR("Alejandro Cabrera <aldaya@gmail.com>"); MODULE_DESCRIPTION("Xilinx Watchdog driver"); -MODULE_LICENSE("GPL v2"); +MODULE_LICENSE("GPL"); diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c index 1b02bfa81b29..ae77112ce97f 100644 --- a/drivers/watchdog/omap_wdt.c +++ b/drivers/watchdog/omap_wdt.c @@ -253,10 +253,10 @@ static int omap_wdt_probe(struct platform_device *pdev) wdev->wdog.ops = &omap_wdt_ops; wdev->wdog.min_timeout = TIMER_MARGIN_MIN; wdev->wdog.max_timeout = TIMER_MARGIN_MAX; + wdev->wdog.timeout = TIMER_MARGIN_DEFAULT; wdev->wdog.parent = &pdev->dev; - if (watchdog_init_timeout(&wdev->wdog, timer_margin, &pdev->dev) < 0) - wdev->wdog.timeout = TIMER_MARGIN_DEFAULT; + watchdog_init_timeout(&wdev->wdog, timer_margin, &pdev->dev); watchdog_set_nowayout(&wdev->wdog, nowayout); diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c index 0529aed158a4..8e261799c84e 100644 --- a/drivers/watchdog/pnx4008_wdt.c +++ b/drivers/watchdog/pnx4008_wdt.c @@ -78,7 +78,7 @@ #define WDOG_COUNTER_RATE 13000000 /*the counter clock is 13 MHz fixed */ static bool nowayout = WATCHDOG_NOWAYOUT; -static unsigned int heartbeat = DEFAULT_HEARTBEAT; +static unsigned int heartbeat; static DEFINE_SPINLOCK(io_lock); static void __iomem *wdt_base; diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c index 831ef83f6de1..6b8c6ddfe30b 100644 --- a/drivers/watchdog/renesas_wdt.c +++ b/drivers/watchdog/renesas_wdt.c @@ -16,6 +16,8 @@ #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> +#include <linux/smp.h> +#include <linux/sys_soc.h> #include <linux/watchdog.h> #define RWTCNT 0 @@ -49,6 +51,7 @@ struct rwdt_priv { void __iomem *base; struct watchdog_device wdev; unsigned long clk_rate; + u16 time_left; u8 cks; }; @@ -107,6 +110,16 @@ static unsigned int rwdt_get_timeleft(struct watchdog_device *wdev) return DIV_BY_CLKS_PER_SEC(priv, 65536 - val); } +static int rwdt_restart(struct watchdog_device *wdev, unsigned long action, + void *data) +{ + struct rwdt_priv *priv = watchdog_get_drvdata(wdev); + + rwdt_start(wdev); + rwdt_write(priv, 0xffff, RWTCNT); + return 0; +} + static const struct watchdog_info rwdt_ident = { .options = WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, .identity = "Renesas WDT Watchdog", @@ -118,8 +131,47 @@ static const struct watchdog_ops rwdt_ops = { .stop = rwdt_stop, .ping = rwdt_init_timeout, .get_timeleft = rwdt_get_timeleft, + .restart = rwdt_restart, }; +#if defined(CONFIG_ARCH_RCAR_GEN2) && defined(CONFIG_SMP) +/* + * Watchdog-reset integration is broken on early revisions of R-Car Gen2 SoCs + */ +static const struct soc_device_attribute rwdt_quirks_match[] = { + { + .soc_id = "r8a7790", + .revision = "ES1.*", + .data = (void *)1, /* needs single CPU */ + }, { + .soc_id = "r8a7791", + .revision = "ES[12].*", + .data = (void *)1, /* needs single CPU */ + }, { + .soc_id = "r8a7792", + .revision = "*", + .data = (void *)0, /* needs SMP disabled */ + }, + { /* sentinel */ } +}; + +static bool rwdt_blacklisted(struct device *dev) +{ + const struct soc_device_attribute *attr; + + attr = soc_device_match(rwdt_quirks_match); + if (attr && setup_max_cpus > (uintptr_t)attr->data) { + dev_info(dev, "Watchdog blacklisted on %s %s\n", attr->soc_id, + attr->revision); + return true; + } + + return false; +} +#else /* !CONFIG_ARCH_RCAR_GEN2 || !CONFIG_SMP */ +static inline bool rwdt_blacklisted(struct device *dev) { return false; } +#endif /* !CONFIG_ARCH_RCAR_GEN2 || !CONFIG_SMP */ + static int rwdt_probe(struct platform_device *pdev) { struct rwdt_priv *priv; @@ -128,6 +180,9 @@ static int rwdt_probe(struct platform_device *pdev) unsigned long clks_per_sec; int ret, i; + if (rwdt_blacklisted(&pdev->dev)) + return -ENODEV; + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; @@ -176,6 +231,7 @@ static int rwdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, priv); watchdog_set_drvdata(&priv->wdev, priv); watchdog_set_nowayout(&priv->wdev, nowayout); + watchdog_set_restart_priority(&priv->wdev, 0); /* This overrides the default timeout only if DT configuration was found */ ret = watchdog_init_timeout(&priv->wdev, 0, &pdev->dev); @@ -203,12 +259,32 @@ static int rwdt_remove(struct platform_device *pdev) return 0; } -/* - * This driver does also fit for R-Car Gen2 (r8a779[0-4]) WDT. However, for SMP - * to work there, one also needs a RESET (RST) driver which does not exist yet - * due to HW issues. This needs to be solved before adding compatibles here. - */ +static int __maybe_unused rwdt_suspend(struct device *dev) +{ + struct rwdt_priv *priv = dev_get_drvdata(dev); + + if (watchdog_active(&priv->wdev)) { + priv->time_left = readw(priv->base + RWTCNT); + rwdt_stop(&priv->wdev); + } + return 0; +} + +static int __maybe_unused rwdt_resume(struct device *dev) +{ + struct rwdt_priv *priv = dev_get_drvdata(dev); + + if (watchdog_active(&priv->wdev)) { + rwdt_start(&priv->wdev); + rwdt_write(priv, priv->time_left, RWTCNT); + } + return 0; +} + +static SIMPLE_DEV_PM_OPS(rwdt_pm_ops, rwdt_suspend, rwdt_resume); + static const struct of_device_id rwdt_ids[] = { + { .compatible = "renesas,rcar-gen2-wdt", }, { .compatible = "renesas,rcar-gen3-wdt", }, { /* sentinel */ } }; @@ -218,6 +294,7 @@ static struct platform_driver rwdt_driver = { .driver = { .name = "renesas_wdt", .of_match_table = rwdt_ids, + .pm = &rwdt_pm_ops, }, .probe = rwdt_probe, .remove = rwdt_remove, diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c index 0ae947c3d7bc..255169916dbb 100644 --- a/drivers/watchdog/sama5d4_wdt.c +++ b/drivers/watchdog/sama5d4_wdt.c @@ -33,7 +33,7 @@ struct sama5d4_wdt { unsigned long last_ping; }; -static int wdt_timeout = WDT_DEFAULT_TIMEOUT; +static int wdt_timeout; static bool nowayout = WATCHDOG_NOWAYOUT; module_param(wdt_timeout, int, 0); @@ -212,7 +212,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev) return -ENOMEM; wdd = &wdt->wdd; - wdd->timeout = wdt_timeout; + wdd->timeout = WDT_DEFAULT_TIMEOUT; wdd->info = &sama5d4_wdt_info; wdd->ops = &sama5d4_wdt_ops; wdd->min_timeout = MIN_WDT_TIMEOUT; @@ -273,7 +273,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, wdt); dev_info(&pdev->dev, "initialized (timeout = %d sec, nowayout = %d)\n", - wdt_timeout, nowayout); + wdd->timeout, nowayout); return 0; } diff --git a/drivers/watchdog/sirfsoc_wdt.c b/drivers/watchdog/sirfsoc_wdt.c index 4eea351e09b0..ac0c9d2c4aee 100644 --- a/drivers/watchdog/sirfsoc_wdt.c +++ b/drivers/watchdog/sirfsoc_wdt.c @@ -29,7 +29,7 @@ #define SIRFSOC_WDT_MAX_TIMEOUT (10 * 60) /* 10 mins */ #define SIRFSOC_WDT_DEFAULT_TIMEOUT 30 /* 30 secs */ -static unsigned int timeout = SIRFSOC_WDT_DEFAULT_TIMEOUT; +static unsigned int timeout; static bool nowayout = WATCHDOG_NOWAYOUT; module_param(timeout, uint, 0); diff --git a/drivers/watchdog/sprd_wdt.c b/drivers/watchdog/sprd_wdt.c index a8b280ff33e0..b4d484a42b70 100644 --- a/drivers/watchdog/sprd_wdt.c +++ b/drivers/watchdog/sprd_wdt.c @@ -154,8 +154,10 @@ static int sprd_wdt_enable(struct sprd_wdt *wdt) if (ret) return ret; ret = clk_prepare_enable(wdt->rtc_enable); - if (ret) + if (ret) { + clk_disable_unprepare(wdt->enable); return ret; + } sprd_wdt_unlock(wdt->base); val = readl_relaxed(wdt->base + SPRD_WDT_CTRL); diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c index e6100e447dd8..177829b379da 100644 --- a/drivers/watchdog/st_lpc_wdt.c +++ b/drivers/watchdog/st_lpc_wdt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * ST's LPC Watchdog * @@ -5,11 +6,6 @@ * * Author: David Paris <david.paris@st.com> for STMicroelectronics * Lee Jones <lee.jones@linaro.org> for STMicroelectronics - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. */ #include <linux/clk.h> diff --git a/drivers/watchdog/sunxi_wdt.c b/drivers/watchdog/sunxi_wdt.c index 802e31b1416d..c6c73656997e 100644 --- a/drivers/watchdog/sunxi_wdt.c +++ b/drivers/watchdog/sunxi_wdt.c @@ -39,7 +39,7 @@ #define DRV_VERSION "1.0" static bool nowayout = WATCHDOG_NOWAYOUT; -static unsigned int timeout = WDT_MAX_TIMEOUT; +static unsigned int timeout; /* * This structure stores the register offsets for different variants diff --git a/drivers/watchdog/tangox_wdt.c b/drivers/watchdog/tangox_wdt.c index d5fcce062920..b1de8297fa40 100644 --- a/drivers/watchdog/tangox_wdt.c +++ b/drivers/watchdog/tangox_wdt.c @@ -1,11 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2015 Mans Rullgard <mans@mansr.com> * SMP86xx/SMP87xx Watchdog driver - * - * 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. */ #include <linux/bitops.h> diff --git a/drivers/watchdog/tegra_wdt.c b/drivers/watchdog/tegra_wdt.c index 9403c08816e3..877dd39bd41f 100644 --- a/drivers/watchdog/tegra_wdt.c +++ b/drivers/watchdog/tegra_wdt.c @@ -1,14 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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/kernel.h> diff --git a/drivers/watchdog/uniphier_wdt.c b/drivers/watchdog/uniphier_wdt.c index 0ea2339d9702..e20a7a459d69 100644 --- a/drivers/watchdog/uniphier_wdt.c +++ b/drivers/watchdog/uniphier_wdt.c @@ -1,18 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Watchdog driver for the UniPhier watchdog timer * * (c) Copyright 2014 Panasonic Corporation * (c) Copyright 2016 Socionext Inc. * 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 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/bitops.h> @@ -212,11 +204,10 @@ static int uniphier_wdt_probe(struct platform_device *pdev) wdev->wdt_dev.ops = &uniphier_wdt_ops; wdev->wdt_dev.max_timeout = WDT_PERIOD_MAX; wdev->wdt_dev.min_timeout = WDT_PERIOD_MIN; + wdev->wdt_dev.timeout = WDT_DEFAULT_TIMEOUT; wdev->wdt_dev.parent = dev; - if (watchdog_init_timeout(&wdev->wdt_dev, timeout, dev) < 0) { - wdev->wdt_dev.timeout = WDT_DEFAULT_TIMEOUT; - } + watchdog_init_timeout(&wdev->wdt_dev, timeout, dev); watchdog_set_nowayout(&wdev->wdt_dev, nowayout); watchdog_stop_on_reboot(&wdev->wdt_dev); diff --git a/drivers/watchdog/wm831x_wdt.c b/drivers/watchdog/wm831x_wdt.c index 1ddc1f742cd4..116c2f47b463 100644 --- a/drivers/watchdog/wm831x_wdt.c +++ b/drivers/watchdog/wm831x_wdt.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for the wm831x PMICs * * Copyright (C) 2009 Wolfson Microelectronics - * - * 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 */ #include <linux/module.h> diff --git a/drivers/watchdog/wm8350_wdt.c b/drivers/watchdog/wm8350_wdt.c index 4ab4b8347d45..33c62d51f00a 100644 --- a/drivers/watchdog/wm8350_wdt.c +++ b/drivers/watchdog/wm8350_wdt.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Watchdog driver for the wm8350 * * Copyright (C) 2007, 2008 Wolfson Microelectronics <linux@wolfsonmicro.com> - * - * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |