diff --git a/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..e83026fef2e993c50fb06003b0b4c513d5df1d9b
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/ti,rti-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 SoC Watchdog Timer
+
+maintainers:
+ - Tero Kristo <t-kristo@ti.com>
+
+description:
+ The TI K3 SoC watchdog timer is implemented via the RTI (Real Time
+ Interrupt) IP module. This timer adds a support for windowed watchdog
+ mode, which will signal an error if it is pinged outside the watchdog
+ time window, meaning either too early or too late. The error signal
+ generated can be routed to either interrupt a safety controller or
+ to directly reset the SoC.
+
+allOf:
+ - $ref: "watchdog.yaml#"
+
+properties:
+ compatible:
+ enum:
+ - ti,j7-rti-wdt
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+ assigned-clocks:
+ maxItems: 1
+
+ assigned-clocks-parents:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - power-domains
+
+examples:
+ - |
+ /*
+ * RTI WDT in main domain on J721e SoC. Assigned clocks are used to
+ * select the source clock for the watchdog, forcing it to tick with
+ * a 32kHz clock in this case.
+ */
+ #include <dt-bindings/soc/ti,sci_pm_domain.h>
+
+ watchdog0: rti@2200000 {
+ compatible = "ti,rti-wdt";
+ reg = <0x0 0x2200000 0x0 0x100>;
+ clocks = <&k3_clks 252 1>;
+ power-domains = <&k3_pds 252 TI_SCI_PD_EXCLUSIVE>;
+ assigned-clocks = <&k3_clks 252 1>;
+ assigned-clock-parents = <&k3_clks 252 5>;
+ };
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 9ea2b43d4b012aebc8571b3b713011733e3d332c..0663c604bd642c454e24a2988b8a12cdf4c347a6 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -584,6 +584,14 @@ config DAVINCI_WATCHDOG
NOTE: once enabled, this timer cannot be disabled.
Say N if you are unsure.
+config K3_RTI_WATCHDOG
+ tristate "Texas Instruments K3 RTI watchdog"
+ depends on ARCH_K3 || COMPILE_TEST
+ select WATCHDOG_CORE
+ help
+ Say Y here if you want to include support for the K3 watchdog
+ timer (RTI module) available in the K3 generation of processors.
+
config ORION_WATCHDOG
tristate "Orion watchdog"
depends on ARCH_ORION5X || ARCH_DOVE || MACH_DOVE || ARCH_MVEBU || (COMPILE_TEST && !ARCH_EBSA110)
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 2ee352bf3372d72d2550e6ad5c7caf397365c492..6de2e4ceef190865dcbe756e92a800921b154961 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -57,6 +57,7 @@ obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o
obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o
+obj-$(CONFIG_K3_RTI_WATCHDOG) += rti_wdt.o
obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o
obj-$(CONFIG_SUNXI_WATCHDOG) += sunxi_wdt.o
obj-$(CONFIG_RN5T618_WATCHDOG) += rn5t618_wdt.o
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index f8d58bf0bf668e85d3dd833861dc637efbc3eac3..1fe472f56cb30b634fa5fe5ee242b6174cea9c19 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -244,6 +244,11 @@ static const struct regmap_config imx2_wdt_regmap_config = {
.max_register = 0x8,
};
+static void imx2_wdt_action(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
static int __init imx2_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -292,6 +297,10 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
if (ret)
return ret;
+ ret = devm_add_action_or_reset(dev, imx2_wdt_action, wdev->clk);
+ if (ret)
+ return ret;
+
regmap_read(wdev->regmap, IMX2_WDT_WRSR, &val);
wdog->bootstatus = val & IMX2_WDT_WRSR_TOUT ? WDIOF_CARDRESET : 0;
@@ -315,32 +324,7 @@ 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)
- goto disable_clk;
-
- dev_info(dev, "timeout %d sec (nowayout=%d)\n",
- wdog->timeout, nowayout);
-
- return 0;
-
-disable_clk:
- clk_disable_unprepare(wdev->clk);
- return ret;
-}
-
-static int __exit imx2_wdt_remove(struct platform_device *pdev)
-{
- struct watchdog_device *wdog = platform_get_drvdata(pdev);
- struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);
-
- watchdog_unregister_device(wdog);
-
- if (imx2_wdt_is_running(wdev)) {
- imx2_wdt_ping(wdog);
- dev_crit(&pdev->dev, "Device removed: Expect reboot!\n");
- }
- return 0;
+ return devm_watchdog_register_device(dev, wdog);
}
static void imx2_wdt_shutdown(struct platform_device *pdev)
@@ -417,7 +401,6 @@ static const struct of_device_id imx2_wdt_dt_ids[] = {
MODULE_DEVICE_TABLE(of, imx2_wdt_dt_ids);
static struct platform_driver imx2_wdt_driver = {
- .remove = __exit_p(imx2_wdt_remove),
.shutdown = imx2_wdt_shutdown,
.driver = {
.name = DRIVER_NAME,
diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c
index 11b9e7c6b7f596a3b5a28c4bfe7acf0e02bece85..7993c8c41b3a8fa9520479576c4fb213b289204f 100644
--- a/drivers/watchdog/imx7ulp_wdt.c
+++ b/drivers/watchdog/imx7ulp_wdt.c
@@ -4,7 +4,6 @@
*/
#include <linux/clk.h>
-#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
diff --git a/drivers/watchdog/imx_sc_wdt.c b/drivers/watchdog/imx_sc_wdt.c
index 8ed89f032ebf29058c6f13ee0b9fb46a31a8588c..60a32469f7ded899e25ce9fc79d4e8e087922481 100644
--- a/drivers/watchdog/imx_sc_wdt.c
+++ b/drivers/watchdog/imx_sc_wdt.c
@@ -6,13 +6,11 @@
#include <linux/arm-smccc.h>
#include <linux/firmware/imx/sci.h>
#include <linux/io.h>
-#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/platform_device.h>
-#include <linux/reboot.h>
#include <linux/watchdog.h>
#define DEFAULT_TIMEOUT 60
diff --git a/drivers/watchdog/npcm_wdt.c b/drivers/watchdog/npcm_wdt.c
index 9c773c3d6d5dc5b9c0f23d33aef332c56304ab5b..765577f11c8db371ff3b8d654a8dc3bc73fb9041 100644
--- a/drivers/watchdog/npcm_wdt.c
+++ b/drivers/watchdog/npcm_wdt.c
@@ -103,30 +103,29 @@ static int npcm_wdt_stop(struct watchdog_device *wdd)
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;
+ wdd->timeout = 2;
else if (timeout < 6)
- wdd->timeout = 5;
+ wdd->timeout = 5;
else if (timeout < 11)
- wdd->timeout = 10;
+ wdd->timeout = 10;
else if (timeout < 22)
- wdd->timeout = 21;
+ wdd->timeout = 21;
else if (timeout < 44)
- wdd->timeout = 43;
+ wdd->timeout = 43;
else if (timeout < 87)
- wdd->timeout = 86;
+ wdd->timeout = 86;
else if (timeout < 173)
- wdd->timeout = 172;
+ wdd->timeout = 172;
else if (timeout < 688)
- wdd->timeout = 687;
+ wdd->timeout = 687;
else
- wdd->timeout = 2750;
+ wdd->timeout = 2750;
if (watchdog_active(wdd))
npcm_wdt_start(wdd);
diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index 8e6dfe76f9c9d48affaa01a1f927eb25308acd2b..4ddb4ea2e4a32d1b2e23b31d016cf27238dd4171 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -52,7 +52,7 @@
#define WDT_A370_RATIO (1 << WDT_A370_RATIO_SHIFT)
static bool nowayout = WATCHDOG_NOWAYOUT;
-static int heartbeat = -1; /* module parameter (seconds) */
+static int heartbeat; /* module parameter (seconds) */
struct orion_watchdog;
diff --git a/drivers/watchdog/pm8916_wdt.c b/drivers/watchdog/pm8916_wdt.c
index 1213179f863c27405dca286393734a9c3e694111..0937b8d3310425b5a7efb81a7c091e711120a22b 100644
--- a/drivers/watchdog/pm8916_wdt.c
+++ b/drivers/watchdog/pm8916_wdt.c
@@ -192,6 +192,7 @@ static int pm8916_wdt_probe(struct platform_device *pdev)
wdt->wdev.timeout = PM8916_WDT_DEFAULT_TIMEOUT;
wdt->wdev.pretimeout = 0;
watchdog_set_drvdata(&wdt->wdev, wdt);
+ platform_set_drvdata(pdev, wdt);
watchdog_init_timeout(&wdt->wdev, 0, dev);
pm8916_wdt_configure_timers(&wdt->wdev);
@@ -199,6 +200,29 @@ static int pm8916_wdt_probe(struct platform_device *pdev)
return devm_watchdog_register_device(dev, &wdt->wdev);
}
+static int __maybe_unused pm8916_wdt_suspend(struct device *dev)
+{
+ struct pm8916_wdt *wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&wdt->wdev))
+ return pm8916_wdt_stop(&wdt->wdev);
+
+ return 0;
+}
+
+static int __maybe_unused pm8916_wdt_resume(struct device *dev)
+{
+ struct pm8916_wdt *wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&wdt->wdev))
+ return pm8916_wdt_start(&wdt->wdev);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(pm8916_wdt_pm_ops, pm8916_wdt_suspend,
+ pm8916_wdt_resume);
+
static const struct of_device_id pm8916_wdt_id_table[] = {
{ .compatible = "qcom,pm8916-wdt" },
{ }
@@ -210,6 +234,7 @@ static struct platform_driver pm8916_wdt_driver = {
.driver = {
.name = "pm8916-wdt",
.of_match_table = of_match_ptr(pm8916_wdt_id_table),
+ .pm = &pm8916_wdt_pm_ops,
},
};
module_platform_driver(pm8916_wdt_driver);
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index eb47fe5ed28052f70334125f1cccc068d19a13f4..ab7465d186fdaa6f849ee193be13f3772658fed4 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -40,6 +40,11 @@ static const u32 reg_offset_data_kpss[] = {
[WDT_BITE_TIME] = 0x14,
};
+struct qcom_wdt_match_data {
+ const u32 *offset;
+ bool pretimeout;
+};
+
struct qcom_wdt {
struct watchdog_device wdd;
unsigned long rate;
@@ -179,19 +184,29 @@ static void qcom_clk_disable_unprepare(void *data)
clk_disable_unprepare(data);
}
+static const struct qcom_wdt_match_data match_data_apcs_tmr = {
+ .offset = reg_offset_data_apcs_tmr,
+ .pretimeout = false,
+};
+
+static const struct qcom_wdt_match_data match_data_kpss = {
+ .offset = reg_offset_data_kpss,
+ .pretimeout = true,
+};
+
static int qcom_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct qcom_wdt *wdt;
struct resource *res;
struct device_node *np = dev->of_node;
- const u32 *regs;
+ const struct qcom_wdt_match_data *data;
u32 percpu_offset;
int irq, ret;
struct clk *clk;
- regs = of_device_get_match_data(dev);
- if (!regs) {
+ data = of_device_get_match_data(dev);
+ if (!data) {
dev_err(dev, "Unsupported QCOM WDT module\n");
return -ENODEV;
}
@@ -247,9 +262,8 @@ static int qcom_wdt_probe(struct platform_device *pdev)
/* check if there is pretimeout support */
irq = platform_get_irq_optional(pdev, 0);
- if (irq > 0) {
- ret = devm_request_irq(dev, irq, qcom_wdt_isr,
- IRQF_TRIGGER_RISING,
+ if (data->pretimeout && irq > 0) {
+ ret = devm_request_irq(dev, irq, qcom_wdt_isr, 0,
"wdt_bark", &wdt->wdd);
if (ret)
return ret;
@@ -267,7 +281,7 @@ static int qcom_wdt_probe(struct platform_device *pdev)
wdt->wdd.min_timeout = 1;
wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
wdt->wdd.parent = dev;
- wdt->layout = regs;
+ wdt->layout = data->offset;
if (readl(wdt_addr(wdt, WDT_STS)) & 1)
wdt->wdd.bootstatus = WDIOF_CARDRESET;
@@ -311,9 +325,9 @@ static int __maybe_unused qcom_wdt_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(qcom_wdt_pm_ops, qcom_wdt_suspend, qcom_wdt_resume);
static const struct of_device_id qcom_wdt_of_table[] = {
- { .compatible = "qcom,kpss-timer", .data = reg_offset_data_apcs_tmr },
- { .compatible = "qcom,scss-timer", .data = reg_offset_data_apcs_tmr },
- { .compatible = "qcom,kpss-wdt", .data = reg_offset_data_kpss },
+ { .compatible = "qcom,kpss-timer", .data = &match_data_apcs_tmr },
+ { .compatible = "qcom,scss-timer", .data = &match_data_apcs_tmr },
+ { .compatible = "qcom,kpss-wdt", .data = &match_data_kpss },
{ },
};
MODULE_DEVICE_TABLE(of, qcom_wdt_of_table);
diff --git a/drivers/watchdog/rti_wdt.c b/drivers/watchdog/rti_wdt.c
new file mode 100644
index 0000000000000000000000000000000000000000..d456dd72d99a0854a361d4ce6abb96db724d55fd
--- /dev/null
+++ b/drivers/watchdog/rti_wdt.c
@@ -0,0 +1,255 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Watchdog driver for the K3 RTI module
+ *
+ * (c) Copyright 2019-2020 Texas Instruments Inc.
+ * All rights reserved.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+
+#define DEFAULT_HEARTBEAT 60
+
+/* Max heartbeat is calculated at 32kHz source clock */
+#define MAX_HEARTBEAT 1000
+
+/* Timer register set definition */
+#define RTIDWDCTRL 0x90
+#define RTIDWDPRLD 0x94
+#define RTIWDSTATUS 0x98
+#define RTIWDKEY 0x9c
+#define RTIDWDCNTR 0xa0
+#define RTIWWDRXCTRL 0xa4
+#define RTIWWDSIZECTRL 0xa8
+
+#define RTIWWDRX_NMI 0xa
+
+#define RTIWWDSIZE_50P 0x50
+
+#define WDENABLE_KEY 0xa98559da
+
+#define WDKEY_SEQ0 0xe51a
+#define WDKEY_SEQ1 0xa35c
+
+#define WDT_PRELOAD_SHIFT 13
+
+#define WDT_PRELOAD_MAX 0xfff
+
+#define DWDST BIT(1)
+
+static int heartbeat;
+
+/*
+ * struct to hold data for each WDT device
+ * @base - base io address of WD device
+ * @freq - source clock frequency of WDT
+ * @wdd - hold watchdog device as is in WDT core
+ */
+struct rti_wdt_device {
+ void __iomem *base;
+ unsigned long freq;
+ struct watchdog_device wdd;
+};
+
+static int rti_wdt_start(struct watchdog_device *wdd)
+{
+ u32 timer_margin;
+ struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);
+
+ /* set timeout period */
+ timer_margin = (u64)wdd->timeout * wdt->freq;
+ timer_margin >>= WDT_PRELOAD_SHIFT;
+ if (timer_margin > WDT_PRELOAD_MAX)
+ timer_margin = WDT_PRELOAD_MAX;
+ writel_relaxed(timer_margin, wdt->base + RTIDWDPRLD);
+
+ /*
+ * RTI only supports a windowed mode, where the watchdog can only
+ * be petted during the open window; not too early or not too late.
+ * The HW configuration options only allow for the open window size
+ * to be 50% or less than that; we obviouly want to configure the open
+ * window as large as possible so we select the 50% option. To avoid
+ * any glitches, we accommodate 5% safety margin also, so we setup
+ * the min_hw_hearbeat at 55% of the timeout period.
+ */
+ wdd->min_hw_heartbeat_ms = 11 * wdd->timeout * 1000 / 20;
+
+ /* Generate NMI when wdt expires */
+ writel_relaxed(RTIWWDRX_NMI, wdt->base + RTIWWDRXCTRL);
+
+ /* Open window size 50%; this is the largest window size available */
+ writel_relaxed(RTIWWDSIZE_50P, wdt->base + RTIWWDSIZECTRL);
+
+ readl_relaxed(wdt->base + RTIWWDSIZECTRL);
+
+ /* enable watchdog */
+ writel_relaxed(WDENABLE_KEY, wdt->base + RTIDWDCTRL);
+ return 0;
+}
+
+static int rti_wdt_ping(struct watchdog_device *wdd)
+{
+ struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);
+
+ /* put watchdog in service state */
+ writel_relaxed(WDKEY_SEQ0, wdt->base + RTIWDKEY);
+ /* put watchdog in active state */
+ writel_relaxed(WDKEY_SEQ1, wdt->base + RTIWDKEY);
+
+ return 0;
+}
+
+static unsigned int rti_wdt_get_timeleft(struct watchdog_device *wdd)
+{
+ u64 timer_counter;
+ u32 val;
+ struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);
+
+ /* if timeout has occurred then return 0 */
+ val = readl_relaxed(wdt->base + RTIWDSTATUS);
+ if (val & DWDST)
+ return 0;
+
+ timer_counter = readl_relaxed(wdt->base + RTIDWDCNTR);
+
+ do_div(timer_counter, wdt->freq);
+
+ return timer_counter;
+}
+
+static const struct watchdog_info rti_wdt_info = {
+ .options = WDIOF_KEEPALIVEPING,
+ .identity = "K3 RTI Watchdog",
+};
+
+static const struct watchdog_ops rti_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = rti_wdt_start,
+ .ping = rti_wdt_ping,
+ .get_timeleft = rti_wdt_get_timeleft,
+};
+
+static int rti_wdt_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct device *dev = &pdev->dev;
+ struct resource *wdt_mem;
+ struct watchdog_device *wdd;
+ struct rti_wdt_device *wdt;
+ struct clk *clk;
+
+ wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
+
+ clk = clk_get(dev, NULL);
+ if (IS_ERR(clk)) {
+ if (PTR_ERR(clk) != -EPROBE_DEFER)
+ dev_err(dev, "failed to get clock\n");
+ return PTR_ERR(clk);
+ }
+
+ wdt->freq = clk_get_rate(clk);
+
+ clk_put(clk);
+
+ if (!wdt->freq) {
+ dev_err(dev, "Failed to get fck rate.\n");
+ return -EINVAL;
+ }
+
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(dev);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "runtime pm failed\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, wdt);
+
+ wdd = &wdt->wdd;
+ wdd->info = &rti_wdt_info;
+ wdd->ops = &rti_wdt_ops;
+ wdd->min_timeout = 1;
+ wdd->max_hw_heartbeat_ms = (WDT_PRELOAD_MAX << WDT_PRELOAD_SHIFT) /
+ wdt->freq * 1000;
+ wdd->timeout = DEFAULT_HEARTBEAT;
+ wdd->parent = dev;
+
+ watchdog_init_timeout(wdd, heartbeat, dev);
+
+ watchdog_set_drvdata(wdd, wdt);
+ watchdog_set_nowayout(wdd, 1);
+ watchdog_set_restart_priority(wdd, 128);
+
+ wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ wdt->base = devm_ioremap_resource(dev, wdt_mem);
+ if (IS_ERR(wdt->base)) {
+ ret = PTR_ERR(wdt->base);
+ goto err_iomap;
+ }
+
+ ret = watchdog_register_device(wdd);
+ if (ret) {
+ dev_err(dev, "cannot register watchdog device\n");
+ goto err_iomap;
+ }
+
+ return 0;
+
+err_iomap:
+ pm_runtime_put_sync(&pdev->dev);
+
+ return ret;
+}
+
+static int rti_wdt_remove(struct platform_device *pdev)
+{
+ struct rti_wdt_device *wdt = platform_get_drvdata(pdev);
+
+ watchdog_unregister_device(&wdt->wdd);
+ pm_runtime_put(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id rti_wdt_of_match[] = {
+ { .compatible = "ti,j7-rti-wdt", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, rti_wdt_of_match);
+
+static struct platform_driver rti_wdt_driver = {
+ .driver = {
+ .name = "rti-wdt",
+ .of_match_table = rti_wdt_of_match,
+ },
+ .probe = rti_wdt_probe,
+ .remove = rti_wdt_remove,
+};
+
+module_platform_driver(rti_wdt_driver);
+
+MODULE_AUTHOR("Tero Kristo <t-kristo@ti.com>");
+MODULE_DESCRIPTION("K3 RTI Watchdog Driver");
+
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat period in seconds from 1 to "
+ __MODULE_STRING(MAX_HEARTBEAT) ", default "
+ __MODULE_STRING(DEFAULT_HEARTBEAT));
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:rti-wdt");
diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index 861daf4f37b28490dc84d82d7650da0b6bcc72d8..4238447578128a73d072df2c89902c86417a9147 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -39,6 +39,10 @@
static DEFINE_IDA(watchdog_ida);
+static int stop_on_reboot = -1;
+module_param(stop_on_reboot, int, 0444);
+MODULE_PARM_DESC(stop_on_reboot, "Stop watchdogs on reboot (0=keep watching, 1=stop)");
+
/*
* Deferred Registration infrastructure.
*
@@ -254,6 +258,14 @@ static int __watchdog_register_device(struct watchdog_device *wdd)
}
}
+ /* Module parameter to force watchdog policy on reboot. */
+ if (stop_on_reboot != -1) {
+ if (stop_on_reboot)
+ set_bit(WDOG_STOP_ON_REBOOT, &wdd->status);
+ else
+ clear_bit(WDOG_STOP_ON_REBOOT, &wdd->status);
+ }
+
if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status)) {
wdd->reboot_nb.notifier_call = watchdog_reboot_notifier;
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 8b5c742f24e81c612cf87e13f24fe71a3b3ee894..7e4cd34a8c20eaade5f4820eb4acca11b986b0b2 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -282,6 +282,7 @@ static int watchdog_start(struct watchdog_device *wdd)
if (err == 0) {
set_bit(WDOG_ACTIVE, &wdd->status);
wd_data->last_keepalive = started_at;
+ wd_data->last_hw_keepalive = started_at;
watchdog_update_worker(wdd);
}
diff --git a/drivers/watchdog/wm831x_wdt.c b/drivers/watchdog/wm831x_wdt.c
index 030ce240620d45529359ca61929365453810cc1c..d96ad8f38bd2e647938b4dfbee9317d046284550 100644
--- a/drivers/watchdog/wm831x_wdt.c
+++ b/drivers/watchdog/wm831x_wdt.c
@@ -13,7 +13,6 @@
#include <linux/platform_device.h>
#include <linux/watchdog.h>
#include <linux/uaccess.h>
-#include <linux/gpio.h>
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>
@@ -29,7 +28,6 @@ struct wm831x_wdt_drvdata {
struct watchdog_device wdt;
struct wm831x *wm831x;
struct mutex lock;
- int update_gpio;
int update_state;
};
@@ -103,14 +101,6 @@ static int wm831x_wdt_ping(struct watchdog_device *wdt_dev)
mutex_lock(&driver_data->lock);
- if (driver_data->update_gpio) {
- gpio_set_value_cansleep(driver_data->update_gpio,
- driver_data->update_state);
- driver_data->update_state = !driver_data->update_state;
- ret = 0;
- goto out;
- }
-
reg = wm831x_reg_read(wm831x, WM831X_WATCHDOG);
if (!(reg & WM831X_WDOG_RST_SRC)) {
@@ -239,23 +229,6 @@ static int wm831x_wdt_probe(struct platform_device *pdev)
reg |= pdata->secondary << WM831X_WDOG_SECACT_SHIFT;
reg |= pdata->software << WM831X_WDOG_RST_SRC_SHIFT;
- if (pdata->update_gpio) {
- ret = devm_gpio_request_one(dev, pdata->update_gpio,
- GPIOF_OUT_INIT_LOW,
- "Watchdog update");
- if (ret < 0) {
- dev_err(wm831x->dev,
- "Failed to request update GPIO: %d\n",
- ret);
- return ret;
- }
-
- driver_data->update_gpio = pdata->update_gpio;
-
- /* Make sure the watchdog takes hardware updates */
- reg |= WM831X_WDOG_RST_SRC;
- }
-
ret = wm831x_reg_unlock(wm831x);
if (ret == 0) {
ret = wm831x_reg_write(wm831x, WM831X_WATCHDOG, reg);
diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c
index 4a363a8b2d20fe0de48539d495c7680a8b8cf48a..cab86a08456bcd3c13bb3e2663ae2facd2221d85 100644
--- a/drivers/watchdog/ziirave_wdt.c
+++ b/drivers/watchdog/ziirave_wdt.c
@@ -422,7 +422,7 @@ static int ziirave_firm_upload(struct watchdog_device *wdd,
static const struct watchdog_info ziirave_wdt_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
- .identity = "Zodiac RAVE Watchdog",
+ .identity = "RAVE Switch Watchdog",
};
static const struct watchdog_ops ziirave_wdt_ops = {
diff --git a/include/linux/mfd/wm831x/pdata.h b/include/linux/mfd/wm831x/pdata.h
index 986986fe4e4e426768a76047f67afc7ce2b61f78..75aa94dadf1c96f9dafecb84844b6b27ff9f7938 100644
--- a/include/linux/mfd/wm831x/pdata.h
+++ b/include/linux/mfd/wm831x/pdata.h
@@ -89,7 +89,6 @@ enum wm831x_watchdog_action {
struct wm831x_watchdog_pdata {
enum wm831x_watchdog_action primary, secondary;
- int update_gpio;
unsigned int software:1;
};