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-rw-r--r--Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt15
-rw-r--r--Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt24
-rw-r--r--Documentation/devicetree/bindings/watchdog/renesas,wdt.txt (renamed from Documentation/devicetree/bindings/watchdog/renesas-wdt.txt)0
-rw-r--r--Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt1
-rw-r--r--Documentation/watchdog/hpwdt.rst4
-rw-r--r--Documentation/watchdog/watchdog-parameters.rst11
-rw-r--r--drivers/watchdog/Kconfig10
-rw-r--r--drivers/watchdog/acquirewdt.c6
-rw-r--r--drivers/watchdog/advantechwdt.c6
-rw-r--r--drivers/watchdog/aspeed_wdt.c8
-rw-r--r--drivers/watchdog/bcm2835_wdt.c5
-rw-r--r--drivers/watchdog/bcm7038_wdt.c4
-rw-r--r--drivers/watchdog/bcm_kona_wdt.c4
-rw-r--r--drivers/watchdog/cadence_wdt.c4
-rw-r--r--drivers/watchdog/da9052_wdt.c9
-rw-r--r--drivers/watchdog/da9062_wdt.c5
-rw-r--r--drivers/watchdog/davinci_wdt.c14
-rw-r--r--drivers/watchdog/digicolor_wdt.c9
-rw-r--r--drivers/watchdog/ebc-c384_wdt.c9
-rw-r--r--drivers/watchdog/eurotechwdt.c6
-rw-r--r--drivers/watchdog/ftwdt010_wdt.c4
-rw-r--r--drivers/watchdog/gpio_wdt.c7
-rw-r--r--drivers/watchdog/hpwdt.c59
-rw-r--r--drivers/watchdog/i6300esb.c5
-rw-r--r--drivers/watchdog/iTCO_vendor_support.c7
-rw-r--r--drivers/watchdog/iTCO_wdt.c6
-rw-r--r--drivers/watchdog/ib700wdt.c6
-rw-r--r--drivers/watchdog/ie6xx_wdt.c8
-rw-r--r--drivers/watchdog/imx2_wdt.c4
-rw-r--r--drivers/watchdog/imx_sc_wdt.c123
-rw-r--r--drivers/watchdog/intel-mid_wdt.c4
-rw-r--r--drivers/watchdog/jz4740_wdt.c57
-rw-r--r--drivers/watchdog/loongson1_wdt.c4
-rw-r--r--drivers/watchdog/max77620_wdt.c8
-rw-r--r--drivers/watchdog/mei_wdt.c4
-rw-r--r--drivers/watchdog/mena21_wdt.c4
-rw-r--r--drivers/watchdog/menf21bmc_wdt.c4
-rw-r--r--drivers/watchdog/mpc8xxx_wdt.c5
-rw-r--r--drivers/watchdog/mv64x60_wdt.c6
-rw-r--r--drivers/watchdog/ni903x_wdt.c4
-rw-r--r--drivers/watchdog/nic7018_wdt.c1
-rw-r--r--drivers/watchdog/npcm_wdt.c4
-rw-r--r--drivers/watchdog/nv_tco.h6
-rw-r--r--drivers/watchdog/octeon-wdt-main.c11
-rw-r--r--drivers/watchdog/of_xilinx_wdt.c4
-rw-r--r--drivers/watchdog/omap_wdt.c6
-rw-r--r--drivers/watchdog/omap_wdt.h21
-rw-r--r--drivers/watchdog/pc87413_wdt.c6
-rw-r--r--drivers/watchdog/pcwd_pci.c6
-rw-r--r--drivers/watchdog/pcwd_usb.c6
-rw-r--r--drivers/watchdog/pic32-dmt.c4
-rw-r--r--drivers/watchdog/pic32-wdt.c4
-rw-r--r--drivers/watchdog/pnx4008_wdt.c9
-rw-r--r--drivers/watchdog/qcom-wdt.c4
-rw-r--r--drivers/watchdog/rave-sp-wdt.c1
-rw-r--r--drivers/watchdog/renesas_wdt.c35
-rw-r--r--drivers/watchdog/retu_wdt.c10
-rw-r--r--drivers/watchdog/s3c2410_wdt.c4
-rw-r--r--drivers/watchdog/sa1100_wdt.c6
-rw-r--r--drivers/watchdog/sama5d4_wdt.c29
-rw-r--r--drivers/watchdog/sbc7240_wdt.c11
-rw-r--r--drivers/watchdog/sbc8360.c6
-rw-r--r--drivers/watchdog/sch311x_wdt.c6
-rw-r--r--drivers/watchdog/softdog.c6
-rw-r--r--drivers/watchdog/sp5100_tco.c4
-rw-r--r--drivers/watchdog/sp805_wdt.c5
-rw-r--r--drivers/watchdog/sprd_wdt.c1
-rw-r--r--drivers/watchdog/st_lpc_wdt.c4
-rw-r--r--drivers/watchdog/stm32_iwdg.c4
-rw-r--r--drivers/watchdog/stmp3xxx_rtc_wdt.c4
-rw-r--r--drivers/watchdog/tegra_wdt.c4
-rw-r--r--drivers/watchdog/ts4800_wdt.c4
-rw-r--r--drivers/watchdog/w83627hf_wdt.c6
-rw-r--r--drivers/watchdog/wafer5823wdt.c6
-rw-r--r--drivers/watchdog/watchdog_core.c22
-rw-r--r--drivers/watchdog/watchdog_core.h6
-rw-r--r--drivers/watchdog/watchdog_dev.c54
-rw-r--r--drivers/watchdog/wd501p.h6
-rw-r--r--drivers/watchdog/wdt.c6
-rw-r--r--drivers/watchdog/wdt_pci.c6
-rw-r--r--drivers/watchdog/wm831x_wdt.c9
-rw-r--r--drivers/watchdog/xen_wdt.c4
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/drivers/watchdog/eurotechwdt.c
+++ b/drivers/watchdog/eurotechwdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Eurotech CPU-1220/1410/1420 on board WDT driver
*
@@ -11,11 +12,6 @@
* (c) Copyright 1996-1997 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/ftwdt010_wdt.c b/drivers/watchdog/ftwdt010_wdt.c
index d9626ef9b9ae..21dcc7765688 100644
--- a/drivers/watchdog/ftwdt010_wdt.c
+++ b/drivers/watchdog/ftwdt010_wdt.c
@@ -165,10 +165,8 @@ static int ftwdt010_wdt_probe(struct platform_device *pdev)
}
ret = devm_watchdog_register_device(dev, &gwdt->wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog\n");
+ if (ret)
return ret;
- }
/* Set up platform driver data */
platform_set_drvdata(pdev, gwdt);
diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c
index 777de10f2a78..0923201ce874 100644
--- a/drivers/watchdog/gpio_wdt.c
+++ b/drivers/watchdog/gpio_wdt.c
@@ -13,6 +13,12 @@
#include <linux/platform_device.h>
#include <linux/watchdog.h>
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
#define SOFT_TIMEOUT_MIN 1
#define SOFT_TIMEOUT_DEF 60
@@ -151,6 +157,7 @@ static int gpio_wdt_probe(struct platform_device *pdev)
priv->wdd.timeout = SOFT_TIMEOUT_DEF;
watchdog_init_timeout(&priv->wdd, 0, dev);
+ watchdog_set_nowayout(&priv->wdd, nowayout);
watchdog_stop_on_reboot(&priv->wdd);
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 8a90f159ffb1..7d34bcf1c45b 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -22,10 +22,11 @@
#include <linux/watchdog.h>
#include <asm/nmi.h>
-#define HPWDT_VERSION "2.0.2"
+#define HPWDT_VERSION "2.0.3"
#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 HPWDT_MAX_TICKS 65535
+#define HPWDT_MAX_TIMER TICKS_TO_SECS(HPWDT_MAX_TICKS)
#define DEFAULT_MARGIN 30
#define PRETIMEOUT_SEC 9
@@ -33,6 +34,7 @@ static bool ilo5;
static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */
static bool nowayout = WATCHDOG_NOWAYOUT;
static bool pretimeout = IS_ENABLED(CONFIG_HPWDT_NMI_DECODING);
+static int kdumptimeout = -1;
static void __iomem *pci_mem_addr; /* the PCI-memory address */
static unsigned long __iomem *hpwdt_nmistat;
@@ -52,15 +54,21 @@ static const struct pci_device_id hpwdt_blacklist[] = {
{0}, /* terminate list */
};
+static struct watchdog_device hpwdt_dev;
/*
* Watchdog operations
*/
+static int hpwdt_hw_is_running(void)
+{
+ return ioread8(hpwdt_timer_con) & 0x01;
+}
+
static int hpwdt_start(struct watchdog_device *wdd)
{
int control = 0x81 | (pretimeout ? 0x4 : 0);
- int reload = SECS_TO_TICKS(wdd->timeout);
+ int reload = SECS_TO_TICKS(min(wdd->timeout, wdd->max_hw_heartbeat_ms/1000));
- dev_dbg(wdd->parent, "start watchdog 0x%08x:0x%02x\n", reload, control);
+ dev_dbg(wdd->parent, "start watchdog 0x%08x:0x%08x:0x%02x\n", wdd->timeout, reload, control);
iowrite16(reload, hpwdt_timer_reg);
iowrite8(control, hpwdt_timer_con);
@@ -85,12 +93,18 @@ static int hpwdt_stop_core(struct watchdog_device *wdd)
return 0;
}
+static void hpwdt_ping_ticks(int val)
+{
+ val = min(val, HPWDT_MAX_TICKS);
+ iowrite16(val, hpwdt_timer_reg);
+}
+
static int hpwdt_ping(struct watchdog_device *wdd)
{
- int reload = SECS_TO_TICKS(wdd->timeout);
+ int reload = SECS_TO_TICKS(min(wdd->timeout, wdd->max_hw_heartbeat_ms/1000));
- dev_dbg(wdd->parent, "ping watchdog 0x%08x\n", reload);
- iowrite16(reload, hpwdt_timer_reg);
+ dev_dbg(wdd->parent, "ping watchdog 0x%08x:0x%08x\n", wdd->timeout, reload);
+ hpwdt_ping_ticks(reload);
return 0;
}
@@ -166,7 +180,14 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs)
if (ilo5 && !pretimeout && !mynmi)
return NMI_DONE;
- hpwdt_stop();
+ if (kdumptimeout < 0)
+ hpwdt_stop();
+ else if (kdumptimeout == 0)
+ ;
+ else {
+ unsigned int val = max((unsigned int)kdumptimeout, hpwdt_dev.timeout);
+ hpwdt_ping_ticks(SECS_TO_TICKS(val));
+ }
hex_byte_pack(panic_msg, mynmi);
nmi_panic(regs, panic_msg);
@@ -204,9 +225,9 @@ static struct watchdog_device hpwdt_dev = {
.info = &ident,
.ops = &hpwdt_ops,
.min_timeout = 1,
- .max_timeout = HPWDT_MAX_TIMER,
.timeout = DEFAULT_MARGIN,
.pretimeout = PRETIMEOUT_SEC,
+ .max_hw_heartbeat_ms = HPWDT_MAX_TIMER * 1000,
};
@@ -298,14 +319,18 @@ static int hpwdt_init_one(struct pci_dev *dev,
hpwdt_timer_reg = pci_mem_addr + 0x70;
hpwdt_timer_con = pci_mem_addr + 0x72;
- /* Make sure that timer is disabled until /dev/watchdog is opened */
- hpwdt_stop();
+ /* Have the core update running timer until user space is ready */
+ if (hpwdt_hw_is_running()) {
+ dev_info(&dev->dev, "timer is running\n");
+ set_bit(WDOG_HW_RUNNING, &hpwdt_dev.status);
+ }
/* Initialize NMI Decoding functionality */
retval = hpwdt_init_nmi_decoding(dev);
if (retval != 0)
goto error_init_nmi_decoding;
+ watchdog_stop_on_unregister(&hpwdt_dev);
watchdog_set_nowayout(&hpwdt_dev, nowayout);
watchdog_init_timeout(&hpwdt_dev, soft_margin, NULL);
@@ -314,13 +339,12 @@ static int hpwdt_init_one(struct pci_dev *dev,
pretimeout = 0;
}
hpwdt_dev.pretimeout = pretimeout ? PRETIMEOUT_SEC : 0;
+ kdumptimeout = min(kdumptimeout, HPWDT_MAX_TIMER);
hpwdt_dev.parent = &dev->dev;
retval = watchdog_register_device(&hpwdt_dev);
- if (retval < 0) {
- dev_err(&dev->dev, "watchdog register failed: %d.\n", retval);
+ if (retval < 0)
goto error_wd_register;
- }
dev_info(&dev->dev, "HPE Watchdog Timer Driver: Version: %s\n",
HPWDT_VERSION);
@@ -328,6 +352,7 @@ static int hpwdt_init_one(struct pci_dev *dev,
hpwdt_dev.timeout, nowayout);
dev_info(&dev->dev, "pretimeout: %s.\n",
pretimeout ? "on" : "off");
+ dev_info(&dev->dev, "kdumptimeout: %d.\n", kdumptimeout);
if (dev->subsystem_vendor == PCI_VENDOR_ID_HP_3PAR)
ilo5 = true;
@@ -345,9 +370,6 @@ error_pci_iomap:
static void hpwdt_exit(struct pci_dev *dev)
{
- if (!nowayout)
- hpwdt_stop();
-
watchdog_unregister_device(&hpwdt_dev);
hpwdt_exit_nmi_decoding();
pci_iounmap(dev, pci_mem_addr);
@@ -376,6 +398,9 @@ module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+module_param(kdumptimeout, int, 0444);
+MODULE_PARM_DESC(kdumptimeout, "Timeout applied for crash kernel transition in seconds");
+
#ifdef CONFIG_HPWDT_NMI_DECODING
module_param(pretimeout, bool, 0);
MODULE_PARM_DESC(pretimeout, "Watchdog pretimeout enabled");
diff --git a/drivers/watchdog/i6300esb.c b/drivers/watchdog/i6300esb.c
index f98f35a05896..a30835f547b3 100644
--- a/drivers/watchdog/i6300esb.c
+++ b/drivers/watchdog/i6300esb.c
@@ -315,11 +315,8 @@ static int esb_probe(struct pci_dev *pdev,
/* Register the watchdog so that userspace has access to it */
ret = watchdog_register_device(&edev->wdd);
- if (ret != 0) {
- dev_err(&pdev->dev,
- "cannot register watchdog device (err=%d)\n", ret);
+ if (ret != 0)
goto err_unmap;
- }
dev_info(&pdev->dev,
"initialized. heartbeat=%d sec (nowayout=%d)\n",
edev->wdd.timeout, nowayout);
diff --git a/drivers/watchdog/iTCO_vendor_support.c b/drivers/watchdog/iTCO_vendor_support.c
index 68a9d9cc2eb8..4f1b96f59349 100644
--- a/drivers/watchdog/iTCO_vendor_support.c
+++ b/drivers/watchdog/iTCO_vendor_support.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* intel TCO vendor specific watchdog driver support
*
* (c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>.
*
- * 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 Wim Van Sebroeck nor Iguana vzw. admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
@@ -216,4 +212,3 @@ MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>, "
MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support");
MODULE_VERSION(DRV_VERSION);
MODULE_LICENSE("GPL");
-
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index 89cea6ce9a08..c559f706ae7e 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* intel TCO Watchdog Driver
*
* (c) Copyright 2006-2011 Wim Van Sebroeck <wim@iguana.be>.
*
- * 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 Wim Van Sebroeck nor Iguana vzw. 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/ib700wdt.c b/drivers/watchdog/ib700wdt.c
index 30d6cec582af..92fd7f33bc4d 100644
--- a/drivers/watchdog/ib700wdt.c
+++ b/drivers/watchdog/ib700wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* IB700 Single Board Computer WDT driver
*
@@ -14,11 +15,6 @@
* (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/ie6xx_wdt.c b/drivers/watchdog/ie6xx_wdt.c
index 508fbefce9f6..8f28993fab8b 100644
--- a/drivers/watchdog/ie6xx_wdt.c
+++ b/drivers/watchdog/ie6xx_wdt.c
@@ -66,7 +66,7 @@ MODULE_PARM_DESC(resetmode,
static struct {
unsigned short sch_wdtba;
- struct spinlock unlock_sequence;
+ spinlock_t unlock_sequence;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
@@ -254,12 +254,8 @@ static int ie6xx_wdt_probe(struct platform_device *pdev)
ie6xx_wdt_debugfs_init();
ret = watchdog_register_device(&ie6xx_wdt_dev);
- if (ret) {
- dev_err(&pdev->dev,
- "Watchdog timer: cannot register device (err =%d)\n",
- ret);
+ if (ret)
goto misc_register_error;
- }
return 0;
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index a606005dd65f..32af3974e6bb 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -316,10 +316,8 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
regmap_write(wdev->regmap, IMX2_WDT_WMCR, 0);
ret = watchdog_register_device(wdog);
- if (ret) {
- dev_err(&pdev->dev, "cannot register watchdog device\n");
+ if (ret)
goto disable_clk;
- }
dev_info(&pdev->dev, "timeout %d sec (nowayout=%d)\n",
wdog->timeout, nowayout);
diff --git a/drivers/watchdog/imx_sc_wdt.c b/drivers/watchdog/imx_sc_wdt.c
index 49848b66186c..78eaaf75a263 100644
--- a/drivers/watchdog/imx_sc_wdt.c
+++ b/drivers/watchdog/imx_sc_wdt.c
@@ -4,6 +4,7 @@
*/
#include <linux/arm-smccc.h>
+#include <linux/firmware/imx/sci.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -33,11 +34,19 @@
#define SC_TIMER_WDOG_ACTION_PARTITION 0
+#define SC_IRQ_WDOG 1
+#define SC_IRQ_GROUP_WDOG 1
+
static bool nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, bool, 0000);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+struct imx_sc_wdt_device {
+ struct watchdog_device wdd;
+ struct notifier_block wdt_notifier;
+};
+
static int imx_sc_wdt_ping(struct watchdog_device *wdog)
{
struct arm_smccc_res res;
@@ -85,24 +94,66 @@ static int imx_sc_wdt_set_timeout(struct watchdog_device *wdog,
return res.a0 ? -EACCES : 0;
}
+static int imx_sc_wdt_set_pretimeout(struct watchdog_device *wdog,
+ unsigned int pretimeout)
+{
+ struct arm_smccc_res res;
+
+ arm_smccc_smc(IMX_SIP_TIMER, IMX_SIP_TIMER_SET_PRETIME_WDOG,
+ pretimeout * 1000, 0, 0, 0, 0, 0, &res);
+ if (res.a0)
+ return -EACCES;
+
+ wdog->pretimeout = pretimeout;
+
+ return 0;
+}
+
+static int imx_sc_wdt_notify(struct notifier_block *nb,
+ unsigned long event, void *group)
+{
+ struct imx_sc_wdt_device *imx_sc_wdd =
+ container_of(nb,
+ struct imx_sc_wdt_device,
+ wdt_notifier);
+
+ if (event & SC_IRQ_WDOG &&
+ *(u8 *)group == SC_IRQ_GROUP_WDOG)
+ watchdog_notify_pretimeout(&imx_sc_wdd->wdd);
+
+ return 0;
+}
+
+static void imx_sc_wdt_action(void *data)
+{
+ struct notifier_block *wdt_notifier = data;
+
+ imx_scu_irq_unregister_notifier(wdt_notifier);
+ imx_scu_irq_group_enable(SC_IRQ_GROUP_WDOG,
+ SC_IRQ_WDOG,
+ false);
+}
+
static const struct watchdog_ops imx_sc_wdt_ops = {
.owner = THIS_MODULE,
.start = imx_sc_wdt_start,
.stop = imx_sc_wdt_stop,
.ping = imx_sc_wdt_ping,
.set_timeout = imx_sc_wdt_set_timeout,
+ .set_pretimeout = imx_sc_wdt_set_pretimeout,
};
-static const struct watchdog_info imx_sc_wdt_info = {
+static struct watchdog_info imx_sc_wdt_info = {
.identity = "i.MX SC watchdog timer",
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE | WDIOF_PRETIMEOUT,
+ WDIOF_MAGICCLOSE,
};
static int imx_sc_wdt_probe(struct platform_device *pdev)
{
+ struct imx_sc_wdt_device *imx_sc_wdd;
+ struct watchdog_device *wdog;
struct device *dev = &pdev->dev;
- struct watchdog_device *imx_sc_wdd;
int ret;
imx_sc_wdd = devm_kzalloc(dev, sizeof(*imx_sc_wdd), GFP_KERNEL);
@@ -111,42 +162,70 @@ static int imx_sc_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, imx_sc_wdd);
- imx_sc_wdd->info = &imx_sc_wdt_info;
- imx_sc_wdd->ops = &imx_sc_wdt_ops;
- imx_sc_wdd->min_timeout = 1;
- imx_sc_wdd->max_timeout = MAX_TIMEOUT;
- imx_sc_wdd->parent = dev;
- imx_sc_wdd->timeout = DEFAULT_TIMEOUT;
-
- watchdog_init_timeout(imx_sc_wdd, 0, dev);
- watchdog_stop_on_reboot(imx_sc_wdd);
- watchdog_stop_on_unregister(imx_sc_wdd);
+ wdog = &imx_sc_wdd->wdd;
+ wdog->info = &imx_sc_wdt_info;
+ wdog->ops = &imx_sc_wdt_ops;
+ wdog->min_timeout = 1;
+ wdog->max_timeout = MAX_TIMEOUT;
+ wdog->parent = dev;
+ wdog->timeout = DEFAULT_TIMEOUT;
+
+ watchdog_init_timeout(wdog, 0, dev);
+ watchdog_stop_on_reboot(wdog);
+ watchdog_stop_on_unregister(wdog);
+
+ ret = devm_watchdog_register_device(dev, wdog);
+
+ if (ret) {
+ dev_err(dev, "Failed to register watchdog device\n");
+ return ret;
+ }
+
+ ret = imx_scu_irq_group_enable(SC_IRQ_GROUP_WDOG,
+ SC_IRQ_WDOG,
+ true);
+ if (ret) {
+ dev_warn(dev, "Enable irq failed, pretimeout NOT supported\n");
+ return 0;
+ }
- ret = devm_watchdog_register_device(dev, imx_sc_wdd);
+ imx_sc_wdd->wdt_notifier.notifier_call = imx_sc_wdt_notify;
+ ret = imx_scu_irq_register_notifier(&imx_sc_wdd->wdt_notifier);
if (ret) {
- dev_err(dev, "Failed to register watchdog device\n");
- return ret;
+ imx_scu_irq_group_enable(SC_IRQ_GROUP_WDOG,
+ SC_IRQ_WDOG,
+ false);
+ dev_warn(dev,
+ "Register irq notifier failed, pretimeout NOT supported\n");
+ return 0;
}
+ ret = devm_add_action_or_reset(dev, imx_sc_wdt_action,
+ &imx_sc_wdd->wdt_notifier);
+ if (!ret)
+ imx_sc_wdt_info.options |= WDIOF_PRETIMEOUT;
+ else
+ dev_warn(dev, "Add action failed, pretimeout NOT supported\n");
+
return 0;
}
static int __maybe_unused imx_sc_wdt_suspend(struct device *dev)
{
- struct watchdog_device *imx_sc_wdd = dev_get_drvdata(dev);
+ struct imx_sc_wdt_device *imx_sc_wdd = dev_get_drvdata(dev);
- if (watchdog_active(imx_sc_wdd))
- imx_sc_wdt_stop(imx_sc_wdd);
+ if (watchdog_active(&imx_sc_wdd->wdd))
+ imx_sc_wdt_stop(&imx_sc_wdd->wdd);
return 0;
}
static int __maybe_unused imx_sc_wdt_resume(struct device *dev)
{
- struct watchdog_device *imx_sc_wdd = dev_get_drvdata(dev);
+ struct imx_sc_wdt_device *imx_sc_wdd = dev_get_drvdata(dev);
- if (watchdog_active(imx_sc_wdd))
- imx_sc_wdt_start(imx_sc_wdd);
+ if (watchdog_active(&imx_sc_wdd->wdd))
+ imx_sc_wdt_start(&imx_sc_wdd->wdd);
return 0;
}
diff --git a/drivers/watchdog/intel-mid_wdt.c b/drivers/watchdog/intel-mid_wdt.c
index b2463f8276e6..2cdbd37c700c 100644
--- a/drivers/watchdog/intel-mid_wdt.c
+++ b/drivers/watchdog/intel-mid_wdt.c
@@ -161,10 +161,8 @@ static int mid_wdt_probe(struct platform_device *pdev)
set_bit(WDOG_HW_RUNNING, &wdt_dev->status);
ret = devm_watchdog_register_device(dev, wdt_dev);
- if (ret) {
- dev_err(dev, "error registering watchdog device\n");
+ if (ret)
return ret;
- }
dev_info(dev, "Intel MID watchdog device probed\n");
diff --git a/drivers/watchdog/jz4740_wdt.c b/drivers/watchdog/jz4740_wdt.c
index 313358b2e0b1..d4a90916dd38 100644
--- a/drivers/watchdog/jz4740_wdt.c
+++ b/drivers/watchdog/jz4740_wdt.c
@@ -4,6 +4,7 @@
* JZ4740 Watchdog driver
*/
+#include <linux/mfd/ingenic-tcu.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
@@ -19,23 +20,16 @@
#include <asm/mach-jz4740/timer.h>
-#define JZ_REG_WDT_TIMER_DATA 0x0
-#define JZ_REG_WDT_COUNTER_ENABLE 0x4
-#define JZ_REG_WDT_TIMER_COUNTER 0x8
-#define JZ_REG_WDT_TIMER_CONTROL 0xC
-
#define JZ_WDT_CLOCK_PCLK 0x1
#define JZ_WDT_CLOCK_RTC 0x2
#define JZ_WDT_CLOCK_EXT 0x4
-#define JZ_WDT_CLOCK_DIV_SHIFT 3
-
-#define JZ_WDT_CLOCK_DIV_1 (0 << JZ_WDT_CLOCK_DIV_SHIFT)
-#define JZ_WDT_CLOCK_DIV_4 (1 << JZ_WDT_CLOCK_DIV_SHIFT)
-#define JZ_WDT_CLOCK_DIV_16 (2 << JZ_WDT_CLOCK_DIV_SHIFT)
-#define JZ_WDT_CLOCK_DIV_64 (3 << JZ_WDT_CLOCK_DIV_SHIFT)
-#define JZ_WDT_CLOCK_DIV_256 (4 << JZ_WDT_CLOCK_DIV_SHIFT)
-#define JZ_WDT_CLOCK_DIV_1024 (5 << JZ_WDT_CLOCK_DIV_SHIFT)
+#define JZ_WDT_CLOCK_DIV_1 (0 << TCU_TCSR_PRESCALE_LSB)
+#define JZ_WDT_CLOCK_DIV_4 (1 << TCU_TCSR_PRESCALE_LSB)
+#define JZ_WDT_CLOCK_DIV_16 (2 << TCU_TCSR_PRESCALE_LSB)
+#define JZ_WDT_CLOCK_DIV_64 (3 << TCU_TCSR_PRESCALE_LSB)
+#define JZ_WDT_CLOCK_DIV_256 (4 << TCU_TCSR_PRESCALE_LSB)
+#define JZ_WDT_CLOCK_DIV_1024 (5 << TCU_TCSR_PRESCALE_LSB)
#define DEFAULT_HEARTBEAT 5
#define MAX_HEARTBEAT 2048
@@ -63,7 +57,7 @@ static int jz4740_wdt_ping(struct watchdog_device *wdt_dev)
{
struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);
- writew(0x0, drvdata->base + JZ_REG_WDT_TIMER_COUNTER);
+ writew(0x0, drvdata->base + TCU_REG_WDT_TCNT);
return 0;
}
@@ -74,6 +68,7 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev,
unsigned int rtc_clk_rate;
unsigned int timeout_value;
unsigned short clock_div = JZ_WDT_CLOCK_DIV_1;
+ u8 tcer;
rtc_clk_rate = clk_get_rate(drvdata->rtc_clk);
@@ -86,18 +81,19 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev,
break;
}
timeout_value >>= 2;
- clock_div += (1 << JZ_WDT_CLOCK_DIV_SHIFT);
+ clock_div += (1 << TCU_TCSR_PRESCALE_LSB);
}
- writeb(0x0, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE);
- writew(clock_div, drvdata->base + JZ_REG_WDT_TIMER_CONTROL);
+ tcer = readb(drvdata->base + TCU_REG_WDT_TCER);
+ writeb(0x0, drvdata->base + TCU_REG_WDT_TCER);
+ writew(clock_div, drvdata->base + TCU_REG_WDT_TCSR);
- writew((u16)timeout_value, drvdata->base + JZ_REG_WDT_TIMER_DATA);
- writew(0x0, drvdata->base + JZ_REG_WDT_TIMER_COUNTER);
- writew(clock_div | JZ_WDT_CLOCK_RTC,
- drvdata->base + JZ_REG_WDT_TIMER_CONTROL);
+ writew((u16)timeout_value, drvdata->base + TCU_REG_WDT_TDR);
+ writew(0x0, drvdata->base + TCU_REG_WDT_TCNT);
+ writew(clock_div | JZ_WDT_CLOCK_RTC, drvdata->base + TCU_REG_WDT_TCSR);
- writeb(0x1, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE);
+ if (tcer & TCU_WDT_TCER_TCEN)
+ writeb(TCU_WDT_TCER_TCEN, drvdata->base + TCU_REG_WDT_TCER);
wdt_dev->timeout = new_timeout;
return 0;
@@ -105,9 +101,18 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev,
static int jz4740_wdt_start(struct watchdog_device *wdt_dev)
{
+ struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);
+ u8 tcer;
+
+ tcer = readb(drvdata->base + TCU_REG_WDT_TCER);
+
jz4740_timer_enable_watchdog();
jz4740_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
+ /* Start watchdog if it wasn't started already */
+ if (!(tcer & TCU_WDT_TCER_TCEN))
+ writeb(TCU_WDT_TCER_TCEN, drvdata->base + TCU_REG_WDT_TCER);
+
return 0;
}
@@ -115,7 +120,7 @@ static int jz4740_wdt_stop(struct watchdog_device *wdt_dev)
{
struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);
- writeb(0x0, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE);
+ writeb(0x0, drvdata->base + TCU_REG_WDT_TCER);
jz4740_timer_disable_watchdog();
return 0;
@@ -187,11 +192,7 @@ static int jz4740_wdt_probe(struct platform_device *pdev)
return PTR_ERR(drvdata->rtc_clk);
}
- ret = devm_watchdog_register_device(dev, &drvdata->wdt);
- if (ret < 0)
- return ret;
-
- return 0;
+ return devm_watchdog_register_device(dev, &drvdata->wdt);
}
static struct platform_driver jz4740_wdt_driver = {
diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c
index c8c2b8a88fc2..bb3d075c0633 100644
--- a/drivers/watchdog/loongson1_wdt.c
+++ b/drivers/watchdog/loongson1_wdt.c
@@ -132,10 +132,8 @@ static int ls1x_wdt_probe(struct platform_device *pdev)
watchdog_set_drvdata(ls1x_wdt, drvdata);
err = devm_watchdog_register_device(dev, &drvdata->wdt);
- if (err) {
- dev_err(dev, "failed to register watchdog device\n");
+ if (err)
return err;
- }
platform_set_drvdata(pdev, drvdata);
diff --git a/drivers/watchdog/max77620_wdt.c b/drivers/watchdog/max77620_wdt.c
index 9937f9fccd2e..be6a53c30002 100644
--- a/drivers/watchdog/max77620_wdt.c
+++ b/drivers/watchdog/max77620_wdt.c
@@ -182,13 +182,7 @@ static int max77620_wdt_probe(struct platform_device *pdev)
watchdog_set_drvdata(wdt_dev, wdt);
watchdog_stop_on_unregister(wdt_dev);
- ret = devm_watchdog_register_device(dev, wdt_dev);
- if (ret < 0) {
- dev_err(dev, "watchdog registration failed: %d\n", ret);
- return ret;
- }
-
- return 0;
+ return devm_watchdog_register_device(dev, wdt_dev);
}
static const struct platform_device_id max77620_wdt_devtype[] = {
diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c
index 96a770938ff0..5391bf3e6b11 100644
--- a/drivers/watchdog/mei_wdt.c
+++ b/drivers/watchdog/mei_wdt.c
@@ -384,10 +384,8 @@ static int mei_wdt_register(struct mei_wdt *wdt)
watchdog_stop_on_reboot(&wdt->wdd);
ret = watchdog_register_device(&wdt->wdd);
- if (ret) {
- dev_err(dev, "unable to register watchdog device = %d.\n", ret);
+ if (ret)
watchdog_set_drvdata(&wdt->wdd, NULL);
- }
wdt->state = MEI_WDT_IDLE;
diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c
index e9ca4e0e25dc..99d2359d5a8a 100644
--- a/drivers/watchdog/mena21_wdt.c
+++ b/drivers/watchdog/mena21_wdt.c
@@ -190,10 +190,8 @@ static int a21_wdt_probe(struct platform_device *pdev)
dev_set_drvdata(dev, drv);
ret = devm_watchdog_register_device(dev, &a21_wdt);
- if (ret) {
- dev_err(dev, "Cannot register watchdog device\n");
+ if (ret)
return ret;
- }
dev_info(dev, "MEN A21 watchdog timer driver enabled\n");
diff --git a/drivers/watchdog/menf21bmc_wdt.c b/drivers/watchdog/menf21bmc_wdt.c
index 7766d7361d3b..81ebdfc371f4 100644
--- a/drivers/watchdog/menf21bmc_wdt.c
+++ b/drivers/watchdog/menf21bmc_wdt.c
@@ -152,10 +152,8 @@ static int menf21bmc_wdt_probe(struct platform_device *pdev)
}
ret = devm_watchdog_register_device(dev, &drv_data->wdt);
- if (ret) {
- dev_err(dev, "failed to register Watchdog device\n");
+ if (ret)
return ret;
- }
dev_info(dev, "MEN 14F021P00 BMC Watchdog device enabled\n");
diff --git a/drivers/watchdog/mpc8xxx_wdt.c b/drivers/watchdog/mpc8xxx_wdt.c
index b6ffad421bd0..3fc457bc16db 100644
--- a/drivers/watchdog/mpc8xxx_wdt.c
+++ b/drivers/watchdog/mpc8xxx_wdt.c
@@ -201,11 +201,8 @@ static int mpc8xxx_wdt_probe(struct platform_device *ofdev)
ddata->wdd.timeout = ddata->wdd.min_timeout;
ret = devm_watchdog_register_device(dev, &ddata->wdd);
- if (ret) {
- dev_err(dev, "cannot register watchdog device (err=%d)\n",
- ret);
+ if (ret)
return ret;
- }
dev_info(dev,
"WDT driver for MPC8xxx initialized. mode:%s timeout=%d sec\n",
diff --git a/drivers/watchdog/mv64x60_wdt.c b/drivers/watchdog/mv64x60_wdt.c
index c785f4f0a196..74bf7144a970 100644
--- a/drivers/watchdog/mv64x60_wdt.c
+++ b/drivers/watchdog/mv64x60_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* mv64x60_wdt.c - MV64X60 (Marvell Discovery) watchdog userspace interface
*
@@ -9,10 +10,7 @@
*
* Derived from mpc8xx_wdt.c, with the following copyright.
*
- * 2002 (c) Florian Schirmer <jolt@tuxbox.org> 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.
+ * 2002 (c) Florian Schirmer <jolt@tuxbox.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/watchdog/ni903x_wdt.c b/drivers/watchdog/ni903x_wdt.c
index 60f5608af2a8..4cebad324b20 100644
--- a/drivers/watchdog/ni903x_wdt.c
+++ b/drivers/watchdog/ni903x_wdt.c
@@ -211,10 +211,8 @@ static int ni903x_acpi_add(struct acpi_device *device)
watchdog_init_timeout(wdd, timeout, dev);
ret = watchdog_register_device(wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog\n");
+ if (ret)
return ret;
- }
/* Switch from boot mode to user mode */
outb(NIWD_CONTROL_RESET | NIWD_CONTROL_MODE,
diff --git a/drivers/watchdog/nic7018_wdt.c b/drivers/watchdog/nic7018_wdt.c
index 2e1a2a3d4ec9..2a46cc662943 100644
--- a/drivers/watchdog/nic7018_wdt.c
+++ b/drivers/watchdog/nic7018_wdt.c
@@ -210,7 +210,6 @@ static int nic7018_probe(struct platform_device *pdev)
ret = watchdog_register_device(wdd);
if (ret) {
outb(LOCK, wdt->io_base + WDT_REG_LOCK);
- dev_err(dev, "failed to register watchdog\n");
return ret;
}
diff --git a/drivers/watchdog/npcm_wdt.c b/drivers/watchdog/npcm_wdt.c
index 9d6c1689b12c..9c773c3d6d5d 100644
--- a/drivers/watchdog/npcm_wdt.c
+++ b/drivers/watchdog/npcm_wdt.c
@@ -220,10 +220,8 @@ static int npcm_wdt_probe(struct platform_device *pdev)
return ret;
ret = devm_watchdog_register_device(dev, &wdt->wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog\n");
+ if (ret)
return ret;
- }
dev_info(dev, "NPCM watchdog driver enabled\n");
diff --git a/drivers/watchdog/nv_tco.h b/drivers/watchdog/nv_tco.h
index c2d1d04e055b..d325e528010f 100644
--- a/drivers/watchdog/nv_tco.h
+++ b/drivers/watchdog/nv_tco.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* nv_tco: TCO timer driver for nVidia chipsets.
*
@@ -10,11 +11,6 @@
* Reserved.
* http://www.kernelconcepts.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.
- *
* Neither kernel concepts nor Nils Faerber 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/octeon-wdt-main.c b/drivers/watchdog/octeon-wdt-main.c
index 0ec419a3f7ed..fde9e739b436 100644
--- a/drivers/watchdog/octeon-wdt-main.c
+++ b/drivers/watchdog/octeon-wdt-main.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Octeon Watchdog driver
*
@@ -10,22 +11,12 @@
* (c) Copyright 1996-1997 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.
*
* (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- *
* The OCTEON watchdog has a maximum timeout of 2^32 * io_clock.
* For most systems this is less than 10 seconds, so to allow for
* software to request longer watchdog heartbeats, we maintain software
diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
index 03786992b701..7fe4f7c3f7ce 100644
--- a/drivers/watchdog/of_xilinx_wdt.c
+++ b/drivers/watchdog/of_xilinx_wdt.c
@@ -238,10 +238,8 @@ static int xwdt_probe(struct platform_device *pdev)
}
rc = devm_watchdog_register_device(dev, xilinx_wdt_wdd);
- if (rc) {
- dev_err(dev, "Cannot register watchdog (err=%d)\n", rc);
+ if (rc)
return rc;
- }
clk_disable(xdev->clk);
diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c
index d49688d93f6a..9b91882fe3c4 100644
--- a/drivers/watchdog/omap_wdt.c
+++ b/drivers/watchdog/omap_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* omap_wdt.c
*
@@ -6,10 +7,7 @@
* Author: MontaVista Software, Inc.
* <gdavis@mvista.com> or <source@mvista.com>
*
- * 2003 (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.
+ * 2003 (c) MontaVista Software, Inc.
*
* History:
*
diff --git a/drivers/watchdog/omap_wdt.h b/drivers/watchdog/omap_wdt.h
index 42f31ec5e90d..950b4643f3e7 100644
--- a/drivers/watchdog/omap_wdt.h
+++ b/drivers/watchdog/omap_wdt.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* linux/drivers/char/watchdog/omap_wdt.h
*
@@ -5,26 +6,6 @@
* OMAP Watchdog timer register definitions
*
* Copyright (C) 2004 Texas Instruments.
- *
- * 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 SOFTWARE IS PROVIDED ``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 AUTHOR 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.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _OMAP_WATCHDOG_H
diff --git a/drivers/watchdog/pc87413_wdt.c b/drivers/watchdog/pc87413_wdt.c
index ca21d6c240a3..2af1a8b3f973 100644
--- a/drivers/watchdog/pc87413_wdt.c
+++ b/drivers/watchdog/pc87413_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* NS pc87413-wdt Watchdog Timer driver for Linux 2.6.x.x
*
@@ -6,11 +7,6 @@
* (C) Copyright 2006 Sven Anders, <anders@anduras.de>
* and Marcus Junker, <junker@anduras.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.
- *
* Neither Sven Anders, Marcus Junker nor ANDURAS AG
* 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/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c
index 5773d2591d3f..e30c1f762045 100644
--- a/drivers/watchdog/pcwd_pci.c
+++ b/drivers/watchdog/pcwd_pci.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Berkshire PCI-PC Watchdog Card Driver
*
@@ -10,11 +11,6 @@
* Matt Domsch <Matt_Domsch@dell.com>,
* Rob Radez <rob@osinvestor.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.
- *
* Neither Wim Van Sebroeck nor Iguana vzw. 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/pcwd_usb.c b/drivers/watchdog/pcwd_usb.c
index 5de6182dae33..6727f8ab2d18 100644
--- a/drivers/watchdog/pcwd_usb.c
+++ b/drivers/watchdog/pcwd_usb.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Berkshire USB-PC Watchdog Card Driver
*
@@ -10,11 +11,6 @@
* Rob Radez <rob@osinvestor.com>,
* Greg Kroah-Hartman <greg@kroah.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.
- *
* Neither Wim Van Sebroeck nor Iguana vzw. 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/pic32-dmt.c b/drivers/watchdog/pic32-dmt.c
index 4f2aca78f13a..f43062b3c4c8 100644
--- a/drivers/watchdog/pic32-dmt.c
+++ b/drivers/watchdog/pic32-dmt.c
@@ -212,10 +212,8 @@ static int pic32_dmt_probe(struct platform_device *pdev)
watchdog_set_drvdata(wdd, dmt);
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "watchdog register failed, err %d\n", ret);
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdd);
return 0;
diff --git a/drivers/watchdog/pic32-wdt.c b/drivers/watchdog/pic32-wdt.c
index 5ecdd880f0b7..41715d68d9e9 100644
--- a/drivers/watchdog/pic32-wdt.c
+++ b/drivers/watchdog/pic32-wdt.c
@@ -221,10 +221,8 @@ static int pic32_wdt_drv_probe(struct platform_device *pdev)
watchdog_set_drvdata(wdd, wdt);
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "watchdog register failed, err %d\n", ret);
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdd);
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index d9e03544aeae..7b446b696f2b 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* drivers/char/watchdog/pnx4008_wdt.c
*
@@ -11,10 +12,6 @@
* 2005-2006 (c) MontaVista Software, Inc.
*
* (C) 2012 Wolfram Sang, Pengutronix
- *
- * 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -221,10 +218,8 @@ static int pnx4008_wdt_probe(struct platform_device *pdev)
set_bit(WDOG_HW_RUNNING, &pnx4008_wdd.status);
ret = devm_watchdog_register_device(dev, &pnx4008_wdd);
- if (ret < 0) {
- dev_err(dev, "cannot register watchdog device\n");
+ if (ret < 0)
return ret;
- }
dev_info(dev, "heartbeat %d sec\n", pnx4008_wdd.timeout);
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index fc0f7e5de38d..7be7f87be28f 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -223,10 +223,8 @@ static int qcom_wdt_probe(struct platform_device *pdev)
watchdog_init_timeout(&wdt->wdd, 0, dev);
ret = devm_watchdog_register_device(dev, &wdt->wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog\n");
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdt);
return 0;
diff --git a/drivers/watchdog/rave-sp-wdt.c b/drivers/watchdog/rave-sp-wdt.c
index 35db173252f9..2c95615b6354 100644
--- a/drivers/watchdog/rave-sp-wdt.c
+++ b/drivers/watchdog/rave-sp-wdt.c
@@ -310,7 +310,6 @@ static int rave_sp_wdt_probe(struct platform_device *pdev)
ret = devm_watchdog_register_device(dev, wdd);
if (ret) {
- dev_err(dev, "Failed to register watchdog device\n");
rave_sp_wdt_stop(wdd);
return ret;
}
diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c
index 565dbc1ec638..00662a8e039c 100644
--- a/drivers/watchdog/renesas_wdt.c
+++ b/drivers/watchdog/renesas_wdt.c
@@ -7,6 +7,7 @@
*/
#include <linux/bitops.h>
#include <linux/clk.h>
+#include <linux/delay.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -70,6 +71,15 @@ static int rwdt_init_timeout(struct watchdog_device *wdev)
return 0;
}
+static void rwdt_wait_cycles(struct rwdt_priv *priv, unsigned int cycles)
+{
+ unsigned int delay;
+
+ delay = DIV_ROUND_UP(cycles * 1000000, priv->clk_rate);
+
+ usleep_range(delay, 2 * delay);
+}
+
static int rwdt_start(struct watchdog_device *wdev)
{
struct rwdt_priv *priv = watchdog_get_drvdata(wdev);
@@ -80,6 +90,8 @@ static int rwdt_start(struct watchdog_device *wdev)
/* Stop the timer before we modify any register */
val = readb_relaxed(priv->base + RWTCSRA) & ~RWTCSRA_TME;
rwdt_write(priv, val, RWTCSRA);
+ /* Delay 2 cycles before setting watchdog counter */
+ rwdt_wait_cycles(priv, 2);
rwdt_init_timeout(wdev);
rwdt_write(priv, priv->cks, RWTCSRA);
@@ -98,6 +110,8 @@ static int rwdt_stop(struct watchdog_device *wdev)
struct rwdt_priv *priv = watchdog_get_drvdata(wdev);
rwdt_write(priv, priv->cks, RWTCSRA);
+ /* Delay 3 cycles before disabling module clock */
+ rwdt_wait_cycles(priv, 3);
pm_runtime_put(wdev->parent);
return 0;
@@ -175,15 +189,16 @@ static inline bool rwdt_blacklisted(struct device *dev) { return false; }
static int rwdt_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct rwdt_priv *priv;
struct clk *clk;
unsigned long clks_per_sec;
int ret, i;
- if (rwdt_blacklisted(&pdev->dev))
+ if (rwdt_blacklisted(dev))
return -ENODEV;
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@@ -191,16 +206,16 @@ static int rwdt_probe(struct platform_device *pdev)
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
- clk = devm_clk_get(&pdev->dev, NULL);
+ clk = devm_clk_get(dev, NULL);
if (IS_ERR(clk))
return PTR_ERR(clk);
- pm_runtime_enable(&pdev->dev);
- pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
priv->clk_rate = clk_get_rate(clk);
priv->wdev.bootstatus = (readb_relaxed(priv->base + RWTCSRA) &
RWTCSRA_WOVF) ? WDIOF_CARDRESET : 0;
- pm_runtime_put(&pdev->dev);
+ pm_runtime_put(dev);
if (!priv->clk_rate) {
ret = -ENOENT;
@@ -216,14 +231,14 @@ static int rwdt_probe(struct platform_device *pdev)
}
if (i < 0) {
- dev_err(&pdev->dev, "Can't find suitable clock divider\n");
+ dev_err(dev, "Can't find suitable clock divider\n");
ret = -ERANGE;
goto out_pm_disable;
}
priv->wdev.info = &rwdt_ident;
priv->wdev.ops = &rwdt_ops;
- priv->wdev.parent = &pdev->dev;
+ priv->wdev.parent = dev;
priv->wdev.min_timeout = 1;
priv->wdev.max_timeout = DIV_BY_CLKS_PER_SEC(priv, 65536);
priv->wdev.timeout = min(priv->wdev.max_timeout, RWDT_DEFAULT_TIMEOUT);
@@ -235,7 +250,7 @@ static int rwdt_probe(struct platform_device *pdev)
watchdog_stop_on_unregister(&priv->wdev);
/* This overrides the default timeout only if DT configuration was found */
- watchdog_init_timeout(&priv->wdev, 0, &pdev->dev);
+ watchdog_init_timeout(&priv->wdev, 0, dev);
ret = watchdog_register_device(&priv->wdev);
if (ret < 0)
@@ -244,7 +259,7 @@ static int rwdt_probe(struct platform_device *pdev)
return 0;
out_pm_disable:
- pm_runtime_disable(&pdev->dev);
+ pm_runtime_disable(dev);
return ret;
}
diff --git a/drivers/watchdog/retu_wdt.c b/drivers/watchdog/retu_wdt.c
index 39cd51df2ffc..258dfcf9cbda 100644
--- a/drivers/watchdog/retu_wdt.c
+++ b/drivers/watchdog/retu_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Retu watchdog driver
*
@@ -5,15 +6,6 @@
*
* Based on code written by Amit Kucheria and Michael Buesch.
* Rewritten by Aaro Koskinen.
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file "COPYING" in the main directory of this
- * archive for more details.
- *
- * 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/slab.h>
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index daf3bf0d86b8..2395f353e52d 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -606,10 +606,8 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
wdt->wdt_device.parent = dev;
ret = watchdog_register_device(&wdt->wdt_device);
- if (ret) {
- dev_err(dev, "cannot register watchdog (%d)\n", ret);
+ if (ret)
goto err_cpufreq;
- }
ret = s3c2410wdt_mask_and_disable_reset(wdt, false);
if (ret < 0)
diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
index bfa035e1a75e..cbd8c957182f 100644
--- a/drivers/watchdog/sa1100_wdt.c
+++ b/drivers/watchdog/sa1100_wdt.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Watchdog driver for the SA11x0/PXA2xx
*
* (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
* Based on SoftDog driver by Alan Cox <alan@lxorguk.ukuu.org.uk>
*
- * 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 Oleg Drokin nor iXcelerator.com 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/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c
index b8da1bf21e12..d193a60430b2 100644
--- a/drivers/watchdog/sama5d4_wdt.c
+++ b/drivers/watchdog/sama5d4_wdt.c
@@ -110,9 +110,7 @@ static int sama5d4_wdt_set_timeout(struct watchdog_device *wdd,
u32 value = WDT_SEC2TICKS(timeout);
wdt->mr &= ~AT91_WDT_WDV;
- wdt->mr &= ~AT91_WDT_WDD;
wdt->mr |= AT91_WDT_SET_WDV(value);
- wdt->mr |= AT91_WDT_SET_WDD(value);
/*
* WDDIS has to be 0 when updating WDD/WDV. The datasheet states: When
@@ -248,7 +246,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
timeout = WDT_SEC2TICKS(wdd->timeout);
- wdt->mr |= AT91_WDT_SET_WDD(timeout);
+ wdt->mr |= AT91_WDT_SET_WDD(WDT_SEC2TICKS(MAX_WDT_TIMEOUT));
wdt->mr |= AT91_WDT_SET_WDV(timeout);
ret = sama5d4_wdt_init(wdt);
@@ -259,10 +257,8 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
watchdog_stop_on_unregister(wdd);
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog device\n");
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdt);
@@ -279,7 +275,17 @@ static const struct of_device_id sama5d4_wdt_of_match[] = {
MODULE_DEVICE_TABLE(of, sama5d4_wdt_of_match);
#ifdef CONFIG_PM_SLEEP
-static int sama5d4_wdt_resume(struct device *dev)
+static int sama5d4_wdt_suspend_late(struct device *dev)
+{
+ struct sama5d4_wdt *wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&wdt->wdd))
+ sama5d4_wdt_stop(&wdt->wdd);
+
+ return 0;
+}
+
+static int sama5d4_wdt_resume_early(struct device *dev)
{
struct sama5d4_wdt *wdt = dev_get_drvdata(dev);
@@ -290,12 +296,17 @@ static int sama5d4_wdt_resume(struct device *dev)
*/
sama5d4_wdt_init(wdt);
+ if (watchdog_active(&wdt->wdd))
+ sama5d4_wdt_start(&wdt->wdd);
+
return 0;
}
#endif
-static SIMPLE_DEV_PM_OPS(sama5d4_wdt_pm_ops, NULL,
- sama5d4_wdt_resume);
+static const struct dev_pm_ops sama5d4_wdt_pm_ops = {
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(sama5d4_wdt_suspend_late,
+ sama5d4_wdt_resume_early)
+};
static struct platform_driver sama5d4_wdt_driver = {
.probe = sama5d4_wdt_probe,
diff --git a/drivers/watchdog/sbc7240_wdt.c b/drivers/watchdog/sbc7240_wdt.c
index efc81b318939..12cdee7d5069 100644
--- a/drivers/watchdog/sbc7240_wdt.c
+++ b/drivers/watchdog/sbc7240_wdt.c
@@ -1,19 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* NANO7240 SBC Watchdog device driver
*
* Based on w83877f.c by Scott Jennings,
*
- * 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;
- *
- * Software distributed under the License is distributed on an "AS IS"
- * basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
* (c) Copyright 2007 Gilles GIGAN <gilles.gigan@jcu.edu.au>
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/watchdog/sbc8360.c b/drivers/watchdog/sbc8360.c
index 3396024e7b76..4f8b9912fc51 100644
--- a/drivers/watchdog/sbc8360.c
+++ b/drivers/watchdog/sbc8360.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* SBC8360 Watchdog driver
*
@@ -19,11 +20,6 @@
* (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/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c
index ed6e9fac5d74..3612f1df381b 100644
--- a/drivers/watchdog/sch311x_wdt.c
+++ b/drivers/watchdog/sch311x_wdt.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* sch311x_wdt.c - Driver for the SCH311x Super-I/O chips
* integrated watchdog.
*
* (c) Copyright 2008 Wim Van Sebroeck <wim@iguana.be>.
*
- * 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 Wim Van Sebroeck nor Iguana vzw. 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/softdog.c b/drivers/watchdog/softdog.c
index 060740625485..3e4885c1545e 100644
--- a/drivers/watchdog/softdog.c
+++ b/drivers/watchdog/softdog.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* SoftDog: A Software Watchdog Device
*
* (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/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
index cd4430ff9b1c..93bd302ae7c5 100644
--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -402,10 +402,8 @@ static int sp5100_tco_probe(struct platform_device *pdev)
return ret;
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "cannot register watchdog device (err=%d)\n", ret);
+ if (ret)
return ret;
- }
/* Show module parameters */
dev_info(dev, "initialized. heartbeat=%d sec (nowayout=%d)\n",
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 072986d461b7..53e04926a7b2 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -288,11 +288,8 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
}
ret = watchdog_register_device(&wdt->wdd);
- if (ret) {
- dev_err(&adev->dev, "watchdog_register_device() failed: %d\n",
- ret);
+ if (ret)
goto err;
- }
amba_set_drvdata(adev, wdt);
dev_info(&adev->dev, "registration successful\n");
diff --git a/drivers/watchdog/sprd_wdt.c b/drivers/watchdog/sprd_wdt.c
index 916fb3f96bdc..edba4e278685 100644
--- a/drivers/watchdog/sprd_wdt.c
+++ b/drivers/watchdog/sprd_wdt.c
@@ -320,7 +320,6 @@ static int sprd_wdt_probe(struct platform_device *pdev)
ret = devm_watchdog_register_device(dev, &wdt->wdd);
if (ret) {
sprd_wdt_disable(wdt);
- dev_err(dev, "failed to register watchdog\n");
return ret;
}
platform_set_drvdata(pdev, wdt);
diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
index 7a90184eb950..14ab6559c748 100644
--- a/drivers/watchdog/st_lpc_wdt.c
+++ b/drivers/watchdog/st_lpc_wdt.c
@@ -228,10 +228,8 @@ static int st_wdog_probe(struct platform_device *pdev)
return ret;
ret = devm_watchdog_register_device(dev, &st_wdog_dev);
- if (ret) {
- dev_err(dev, "Unable to register watchdog\n");
+ if (ret)
return ret;
- }
st_wdog_setup(st_wdog, true);
diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c
index d569a3634d9b..a3a329011a06 100644
--- a/drivers/watchdog/stm32_iwdg.c
+++ b/drivers/watchdog/stm32_iwdg.c
@@ -263,10 +263,8 @@ static int stm32_iwdg_probe(struct platform_device *pdev)
watchdog_init_timeout(wdd, 0, dev);
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog device\n");
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdt);
diff --git a/drivers/watchdog/stmp3xxx_rtc_wdt.c b/drivers/watchdog/stmp3xxx_rtc_wdt.c
index 671f4ba7b4ed..7caf3aa71c6a 100644
--- a/drivers/watchdog/stmp3xxx_rtc_wdt.c
+++ b/drivers/watchdog/stmp3xxx_rtc_wdt.c
@@ -98,10 +98,8 @@ static int stmp3xxx_wdt_probe(struct platform_device *pdev)
stmp3xxx_wdd.parent = dev;
ret = devm_watchdog_register_device(dev, &stmp3xxx_wdd);
- if (ret < 0) {
- dev_err(dev, "cannot register watchdog device\n");
+ if (ret < 0)
return ret;
- }
if (register_reboot_notifier(&wdt_notifier))
dev_warn(dev, "cannot register reboot notifier\n");
diff --git a/drivers/watchdog/tegra_wdt.c b/drivers/watchdog/tegra_wdt.c
index a58b000acc4f..dfe06e506cad 100644
--- a/drivers/watchdog/tegra_wdt.c
+++ b/drivers/watchdog/tegra_wdt.c
@@ -219,10 +219,8 @@ static int tegra_wdt_probe(struct platform_device *pdev)
watchdog_stop_on_unregister(wdd);
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog device\n");
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdt);
diff --git a/drivers/watchdog/ts4800_wdt.c b/drivers/watchdog/ts4800_wdt.c
index 9dc6d7f45806..c137ad2bd5c3 100644
--- a/drivers/watchdog/ts4800_wdt.c
+++ b/drivers/watchdog/ts4800_wdt.c
@@ -171,10 +171,8 @@ static int ts4800_wdt_probe(struct platform_device *pdev)
ts4800_wdt_stop(wdd);
ret = devm_watchdog_register_device(dev, wdd);
- if (ret) {
- dev_err(dev, "failed to register watchdog device\n");
+ if (ret)
return ret;
- }
platform_set_drvdata(pdev, wdt);
diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 3a49ba9ea608..38b31e9947aa 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* w83627hf/thf WDT driver
*
@@ -17,11 +18,6 @@
* (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/wafer5823wdt.c b/drivers/watchdog/wafer5823wdt.c
index 0a8073b419f8..6d2071a0590d 100644
--- a/drivers/watchdog/wafer5823wdt.c
+++ b/drivers/watchdog/wafer5823wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ICP Wafer 5823 Single Board Computer WDT driver
* http://www.icpamerica.com/wafer_5823.php
@@ -13,11 +14,6 @@
* (c) Copyright 1996-1997 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/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index 62be9e52a4de..21e8085b848b 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* watchdog_core.c
*
@@ -16,11 +17,6 @@
* Satyam Sharma <satyam@infradead.org>
* Randy Dunlap <randy.dunlap@oracle.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.
- *
* Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw.
* admit liability nor provide warranty for any of this software.
* This material is provided "AS-IS" and at no charge.
@@ -60,11 +56,10 @@ static DEFINE_MUTEX(wtd_deferred_reg_mutex);
static LIST_HEAD(wtd_deferred_reg_list);
static bool wtd_deferred_reg_done;
-static int watchdog_deferred_registration_add(struct watchdog_device *wdd)
+static void watchdog_deferred_registration_add(struct watchdog_device *wdd)
{
list_add_tail(&wdd->deferred,
&wtd_deferred_reg_list);
- return 0;
}
static void watchdog_deferred_registration_del(struct watchdog_device *wdd)
@@ -265,14 +260,23 @@ static int __watchdog_register_device(struct watchdog_device *wdd)
int watchdog_register_device(struct watchdog_device *wdd)
{
- int ret;
+ const char *dev_str;
+ int ret = 0;
mutex_lock(&wtd_deferred_reg_mutex);
if (wtd_deferred_reg_done)
ret = __watchdog_register_device(wdd);
else
- ret = watchdog_deferred_registration_add(wdd);
+ watchdog_deferred_registration_add(wdd);
mutex_unlock(&wtd_deferred_reg_mutex);
+
+ if (ret) {
+ dev_str = wdd->parent ? dev_name(wdd->parent) :
+ (const char *)wdd->info->identity;
+ pr_err("%s: failed to register watchdog device (err = %d)\n",
+ dev_str, ret);
+ }
+
return ret;
}
EXPORT_SYMBOL_GPL(watchdog_register_device);
diff --git a/drivers/watchdog/watchdog_core.h b/drivers/watchdog/watchdog_core.h
index 86ff962d1e15..a5062e8e0d13 100644
--- a/drivers/watchdog/watchdog_core.h
+++ b/drivers/watchdog/watchdog_core.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* watchdog_core.h
*
@@ -16,11 +17,6 @@
* Satyam Sharma <satyam@infradead.org>
* Randy Dunlap <randy.dunlap@oracle.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.
- *
* Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw.
* 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/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 252a7c7b6592..dbd2ad4c9294 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* watchdog_dev.c
*
@@ -20,11 +21,6 @@
* Satyam Sharma <satyam@infradead.org>
* Randy Dunlap <randy.dunlap@oracle.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.
- *
* Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw.
* admit liability nor provide warranty for any of this software.
* This material is provided "AS-IS" and at no charge.
@@ -69,6 +65,7 @@ struct watchdog_core_data {
struct mutex lock;
ktime_t last_keepalive;
ktime_t last_hw_keepalive;
+ ktime_t open_deadline;
struct hrtimer timer;
struct kthread_work work;
unsigned long status; /* Internal status bits */
@@ -87,6 +84,19 @@ static struct kthread_worker *watchdog_kworker;
static bool handle_boot_enabled =
IS_ENABLED(CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED);
+static unsigned open_timeout = CONFIG_WATCHDOG_OPEN_TIMEOUT;
+
+static bool watchdog_past_open_deadline(struct watchdog_core_data *data)
+{
+ return ktime_after(ktime_get(), data->open_deadline);
+}
+
+static void watchdog_set_open_deadline(struct watchdog_core_data *data)
+{
+ data->open_deadline = open_timeout ?
+ ktime_get() + ktime_set(open_timeout, 0) : KTIME_MAX;
+}
+
static inline bool watchdog_need_worker(struct watchdog_device *wdd)
{
/* All variables in milli-seconds */
@@ -119,14 +129,15 @@ static ktime_t watchdog_next_keepalive(struct watchdog_device *wdd)
ktime_t virt_timeout;
unsigned int hw_heartbeat_ms;
- virt_timeout = ktime_add(wd_data->last_keepalive,
- ms_to_ktime(timeout_ms));
+ if (watchdog_active(wdd))
+ virt_timeout = ktime_add(wd_data->last_keepalive,
+ ms_to_ktime(timeout_ms));
+ else
+ virt_timeout = wd_data->open_deadline;
+
hw_heartbeat_ms = min_not_zero(timeout_ms, wdd->max_hw_heartbeat_ms);
keepalive_interval = ms_to_ktime(hw_heartbeat_ms / 2);
- if (!watchdog_active(wdd))
- return keepalive_interval;
-
/*
* To ensure that the watchdog times out wdd->timeout seconds
* after the most recent ping from userspace, the last
@@ -211,7 +222,13 @@ static bool watchdog_worker_should_ping(struct watchdog_core_data *wd_data)
{
struct watchdog_device *wdd = wd_data->wdd;
- return wdd && (watchdog_active(wdd) || watchdog_hw_running(wdd));
+ if (!wdd)
+ return false;
+
+ if (watchdog_active(wdd))
+ return true;
+
+ return watchdog_hw_running(wdd) && !watchdog_past_open_deadline(wd_data);
}
static void watchdog_ping_work(struct kthread_work *work)
@@ -824,6 +841,15 @@ static int watchdog_open(struct inode *inode, struct file *file)
if (!hw_running)
kref_get(&wd_data->kref);
+ /*
+ * open_timeout only applies for the first open from
+ * userspace. Set open_deadline to infinity so that the kernel
+ * will take care of an always-running hardware watchdog in
+ * case the device gets magic-closed or WDIOS_DISABLECARD is
+ * applied.
+ */
+ wd_data->open_deadline = KTIME_MAX;
+
/* dev/watchdog is a virtual (and thus non-seekable) filesystem */
return stream_open(inode, file);
@@ -983,6 +1009,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
/* Record time of most recent heartbeat as 'just before now'. */
wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);
+ watchdog_set_open_deadline(wd_data);
/*
* If the watchdog is running, prevent its driver from being unloaded,
@@ -1181,3 +1208,8 @@ module_param(handle_boot_enabled, bool, 0444);
MODULE_PARM_DESC(handle_boot_enabled,
"Watchdog core auto-updates boot enabled watchdogs before userspace takes over (default="
__MODULE_STRING(IS_ENABLED(CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED)) ")");
+
+module_param(open_timeout, uint, 0644);
+MODULE_PARM_DESC(open_timeout,
+ "Maximum time (in seconds, 0 means infinity) for userspace to take over a running watchdog (default="
+ __MODULE_STRING(CONFIG_WATCHDOG_OPEN_TIMEOUT) ")");
diff --git a/drivers/watchdog/wd501p.h b/drivers/watchdog/wd501p.h
index 0e3a497d5626..43a4d88fd363 100644
--- a/drivers/watchdog/wd501p.h
+++ b/drivers/watchdog/wd501p.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-1.0+ */
/*
* Industrial Computer Source WDT500/501 driver
*
@@ -11,12 +12,7 @@
*
* http://www.cymru.net
*
- * This driver is provided under the GNU General Public License,
- * incorporated herein by reference. The driver is provided without
- * warranty or support.
- *
* Release 0.04.
- *
*/
diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c
index 3d2f5ed60e88..0650100fad00 100644
--- a/drivers/watchdog/wdt.c
+++ b/drivers/watchdog/wdt.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Industrial Computer Source WDT501 driver
*
* (c) Copyright 1996-1997 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/wdt_pci.c b/drivers/watchdog/wdt_pci.c
index ff3a41f47127..66303ab95685 100644
--- a/drivers/watchdog/wdt_pci.c
+++ b/drivers/watchdog/wdt_pci.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Industrial Computer Source PCI-WDT500/501 driver
*
* (c) Copyright 1996-1997 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/wm831x_wdt.c b/drivers/watchdog/wm831x_wdt.c
index 9b6565a3fab4..030ce240620d 100644
--- a/drivers/watchdog/wm831x_wdt.c
+++ b/drivers/watchdog/wm831x_wdt.c
@@ -267,14 +267,7 @@ static int wm831x_wdt_probe(struct platform_device *pdev)
}
}
- ret = devm_watchdog_register_device(dev, &driver_data->wdt);
- if (ret != 0) {
- dev_err(wm831x->dev, "watchdog_register_device() failed: %d\n",
- ret);
- return ret;
- }
-
- return 0;
+ return devm_watchdog_register_device(dev, &driver_data->wdt);
}
static struct platform_driver wm831x_wdt_driver = {
diff --git a/drivers/watchdog/xen_wdt.c b/drivers/watchdog/xen_wdt.c
index 2ba0a3c4523c..b343f421dc72 100644
--- a/drivers/watchdog/xen_wdt.c
+++ b/drivers/watchdog/xen_wdt.c
@@ -138,10 +138,8 @@ static int xen_wdt_probe(struct platform_device *pdev)
watchdog_stop_on_unregister(&xen_wdt_dev);
ret = devm_watchdog_register_device(dev, &xen_wdt_dev);
- if (ret) {
- dev_err(dev, "cannot register watchdog device (%d)\n", ret);
+ if (ret)
return ret;
- }
dev_info(dev, "initialized (timeout=%ds, nowayout=%d)\n",
xen_wdt_dev.timeout, nowayout);