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-rw-r--r--drivers/watchdog/Kconfig10
-rw-r--r--drivers/watchdog/Makefile1
-rw-r--r--drivers/watchdog/imx2_wdt.c5
-rw-r--r--drivers/watchdog/menz69_wdt.c170
-rw-r--r--drivers/watchdog/orion_wdt.c2
-rw-r--r--drivers/watchdog/sp805_wdt.c63
-rw-r--r--drivers/watchdog/sprd_wdt.c4
-rw-r--r--drivers/watchdog/stm32_iwdg.c116
-rw-r--r--drivers/watchdog/stmp3xxx_rtc_wdt.c5
9 files changed, 312 insertions, 64 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 9af07fd92763..5ea8909a41f9 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -161,6 +161,16 @@ config MENF21BMC_WATCHDOG
This driver can also be built as a module. If so the module
will be called menf21bmc_wdt.
+config MENZ069_WATCHDOG
+ tristate "MEN 16Z069 Watchdog"
+ depends on MCB
+ select WATCHDOG_CORE
+ help
+ Say Y here to include support for the MEN 16Z069 Watchdog.
+
+ This driver can also be built as a module. If so the module
+ will be called menz069_wdt.
+
config TANGOX_WATCHDOG
tristate "Sigma Designs SMP86xx/SMP87xx watchdog"
select WATCHDOG_CORE
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 1d3c6b094fe5..bf92e7bf9ce0 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -215,4 +215,5 @@ obj-$(CONFIG_MAX77620_WATCHDOG) += max77620_wdt.o
obj-$(CONFIG_ZIIRAVE_WATCHDOG) += ziirave_wdt.o
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
obj-$(CONFIG_MENF21BMC_WATCHDOG) += menf21bmc_wdt.o
+obj-$(CONFIG_MENZ069_WATCHDOG) += menz69_wdt.o
obj-$(CONFIG_RAVE_SP_WATCHDOG) += rave-sp-wdt.o
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index f07850d2c977..2b52514eaa86 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Watchdog driver for IMX2 and later processors
*
@@ -7,10 +8,6 @@
* some parts adapted by similar drivers from Darius Augulis and Vladimir
* Zapolskiy, additional improvements by Wim Van Sebroeck.
*
- * 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.
- *
* NOTE: MX1 has a slightly different Watchdog than MX2 and later:
*
* MX1: MX2+:
diff --git a/drivers/watchdog/menz69_wdt.c b/drivers/watchdog/menz69_wdt.c
new file mode 100644
index 000000000000..ed18238c5407
--- /dev/null
+++ b/drivers/watchdog/menz69_wdt.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Watchdog driver for the MEN z069 IP-Core
+ *
+ * Copyright (C) 2018 Johannes Thumshirn <jth@kernel.org>
+ */
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mcb.h>
+#include <linux/module.h>
+#include <linux/watchdog.h>
+
+struct men_z069_drv {
+ struct watchdog_device wdt;
+ void __iomem *base;
+ struct resource *mem;
+};
+
+#define MEN_Z069_WTR 0x10
+#define MEN_Z069_WTR_WDEN BIT(15)
+#define MEN_Z069_WTR_WDET_MASK 0x7fff
+#define MEN_Z069_WVR 0x14
+
+#define MEN_Z069_TIMER_FREQ 500 /* 500 Hz */
+#define MEN_Z069_WDT_COUNTER_MIN 1
+#define MEN_Z069_WDT_COUNTER_MAX 0x7fff
+#define MEN_Z069_DEFAULT_TIMEOUT 30
+
+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) ")");
+
+static int men_z069_wdt_start(struct watchdog_device *wdt)
+{
+ struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
+ u16 val;
+
+ val = readw(drv->base + MEN_Z069_WTR);
+ val |= MEN_Z069_WTR_WDEN;
+ writew(val, drv->base + MEN_Z069_WTR);
+
+ return 0;
+}
+
+static int men_z069_wdt_stop(struct watchdog_device *wdt)
+{
+ struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
+ u16 val;
+
+ val = readw(drv->base + MEN_Z069_WTR);
+ val &= ~MEN_Z069_WTR_WDEN;
+ writew(val, drv->base + MEN_Z069_WTR);
+
+ return 0;
+}
+
+static int men_z069_wdt_ping(struct watchdog_device *wdt)
+{
+ struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
+ u16 val;
+
+ /* The watchdog trigger value toggles between 0x5555 and 0xaaaa */
+ val = readw(drv->base + MEN_Z069_WVR);
+ val ^= 0xffff;
+ writew(val, drv->base + MEN_Z069_WVR);
+
+ return 0;
+}
+
+static int men_z069_wdt_set_timeout(struct watchdog_device *wdt,
+ unsigned int timeout)
+{
+ struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
+ u16 reg, val, ena;
+
+ wdt->timeout = timeout;
+ val = timeout * MEN_Z069_TIMER_FREQ;
+
+ reg = readw(drv->base + MEN_Z069_WVR);
+ ena = reg & MEN_Z069_WTR_WDEN;
+ reg = ena | val;
+ writew(reg, drv->base + MEN_Z069_WTR);
+
+ return 0;
+}
+
+static const struct watchdog_info men_z069_info = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+ .identity = "MEN z069 Watchdog",
+};
+
+static const struct watchdog_ops men_z069_ops = {
+ .owner = THIS_MODULE,
+ .start = men_z069_wdt_start,
+ .stop = men_z069_wdt_stop,
+ .ping = men_z069_wdt_ping,
+ .set_timeout = men_z069_wdt_set_timeout,
+};
+
+static struct watchdog_device men_z069_wdt = {
+ .info = &men_z069_info,
+ .ops = &men_z069_ops,
+ .timeout = MEN_Z069_DEFAULT_TIMEOUT,
+ .min_timeout = 1,
+ .max_timeout = MEN_Z069_WDT_COUNTER_MAX / MEN_Z069_TIMER_FREQ,
+};
+
+static int men_z069_probe(struct mcb_device *dev,
+ const struct mcb_device_id *id)
+{
+ struct men_z069_drv *drv;
+ struct resource *mem;
+
+ drv = devm_kzalloc(&dev->dev, sizeof(struct men_z069_drv), GFP_KERNEL);
+ if (!drv)
+ return -ENOMEM;
+
+ mem = mcb_request_mem(dev, "z069-wdt");
+ if (IS_ERR(mem))
+ return PTR_ERR(mem);
+
+ drv->base = devm_ioremap(&dev->dev, mem->start, resource_size(mem));
+ if (drv->base == NULL)
+ goto release_mem;
+
+ drv->mem = mem;
+
+ drv->wdt = men_z069_wdt;
+ watchdog_init_timeout(&drv->wdt, 0, &dev->dev);
+ watchdog_set_nowayout(&drv->wdt, nowayout);
+ watchdog_set_drvdata(&drv->wdt, drv);
+ drv->wdt.parent = &dev->dev;
+ mcb_set_drvdata(dev, drv);
+
+ return watchdog_register_device(&men_z069_wdt);
+
+release_mem:
+ mcb_release_mem(mem);
+ return -ENOMEM;
+}
+
+static void men_z069_remove(struct mcb_device *dev)
+{
+ struct men_z069_drv *drv = mcb_get_drvdata(dev);
+
+ watchdog_unregister_device(&drv->wdt);
+ mcb_release_mem(drv->mem);
+}
+
+static const struct mcb_device_id men_z069_ids[] = {
+ { .device = 0x45 },
+ { }
+};
+MODULE_DEVICE_TABLE(mcb, men_z069_ids);
+
+static struct mcb_driver men_z069_driver = {
+ .driver = {
+ .name = "z069-wdt",
+ .owner = THIS_MODULE,
+ },
+ .probe = men_z069_probe,
+ .remove = men_z069_remove,
+ .id_table = men_z069_ids,
+};
+module_mcb_driver(men_z069_driver);
+
+MODULE_AUTHOR("Johannes Thumshirn <jth@kernel.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("mcb:16z069");
diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index ea676d233e1e..9db3b09f7568 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -581,6 +581,8 @@ static int orion_wdt_probe(struct platform_device *pdev)
*/
if (!orion_wdt_enabled(&dev->wdt))
orion_wdt_stop(&dev->wdt);
+ else
+ set_bit(WDOG_HW_RUNNING, &dev->wdt.status);
/* Request the IRQ only after the watchdog is disabled */
irq = platform_get_irq(pdev, 0);
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 9849db0743a7..072986d461b7 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -11,6 +11,7 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/resource.h>
#include <linux/amba/bus.h>
@@ -22,6 +23,7 @@
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/of.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@@ -42,6 +44,7 @@
/* control register masks */
#define INT_ENABLE (1 << 0)
#define RESET_ENABLE (1 << 1)
+ #define ENABLE_MASK (INT_ENABLE | RESET_ENABLE)
#define WDTINTCLR 0x00C
#define WDTRIS 0x010
#define WDTMIS 0x014
@@ -65,6 +68,7 @@ struct sp805_wdt {
spinlock_t lock;
void __iomem *base;
struct clk *clk;
+ u64 rate;
struct amba_device *adev;
unsigned int load_val;
};
@@ -74,13 +78,22 @@ module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout,
"Set to 1 to keep watchdog running after device release");
+/* returns true if wdt is running; otherwise returns false */
+static bool wdt_is_running(struct watchdog_device *wdd)
+{
+ struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
+ u32 wdtcontrol = readl_relaxed(wdt->base + WDTCONTROL);
+
+ return (wdtcontrol & ENABLE_MASK) == ENABLE_MASK;
+}
+
/* This routine finds load value that will reset system in required timout */
static int wdt_setload(struct watchdog_device *wdd, unsigned int timeout)
{
struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
u64 load, rate;
- rate = clk_get_rate(wdt->clk);
+ rate = wdt->rate;
/*
* sp805 runs counter with given value twice, after the end of first
@@ -106,9 +119,7 @@ static int wdt_setload(struct watchdog_device *wdd, unsigned int timeout)
static unsigned int wdt_timeleft(struct watchdog_device *wdd)
{
struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
- u64 load, rate;
-
- rate = clk_get_rate(wdt->clk);
+ u64 load;
spin_lock(&wdt->lock);
load = readl_relaxed(wdt->base + WDTVALUE);
@@ -118,7 +129,7 @@ static unsigned int wdt_timeleft(struct watchdog_device *wdd)
load += wdt->load_val + 1;
spin_unlock(&wdt->lock);
- return div_u64(load, rate);
+ return div_u64(load, wdt->rate);
}
static int
@@ -228,11 +239,25 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
if (IS_ERR(wdt->base))
return PTR_ERR(wdt->base);
- wdt->clk = devm_clk_get(&adev->dev, NULL);
- if (IS_ERR(wdt->clk)) {
- dev_warn(&adev->dev, "Clock not found\n");
- ret = PTR_ERR(wdt->clk);
- goto err;
+ if (adev->dev.of_node) {
+ wdt->clk = devm_clk_get(&adev->dev, NULL);
+ if (IS_ERR(wdt->clk)) {
+ dev_err(&adev->dev, "Clock not found\n");
+ return PTR_ERR(wdt->clk);
+ }
+ wdt->rate = clk_get_rate(wdt->clk);
+ } else if (has_acpi_companion(&adev->dev)) {
+ /*
+ * When Driver probe with ACPI device, clock devices
+ * are not available, so watchdog rate get from
+ * clock-frequency property given in _DSD object.
+ */
+ device_property_read_u64(&adev->dev, "clock-frequency",
+ &wdt->rate);
+ if (!wdt->rate) {
+ dev_err(&adev->dev, "no clock-frequency property\n");
+ return -ENODEV;
+ }
}
wdt->adev = adev;
@@ -244,7 +269,23 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
watchdog_set_nowayout(&wdt->wdd, nowayout);
watchdog_set_drvdata(&wdt->wdd, wdt);
watchdog_set_restart_priority(&wdt->wdd, 128);
- wdt_setload(&wdt->wdd, DEFAULT_TIMEOUT);
+
+ /*
+ * If 'timeout-sec' devicetree property is specified, use that.
+ * Otherwise, use DEFAULT_TIMEOUT
+ */
+ wdt->wdd.timeout = DEFAULT_TIMEOUT;
+ watchdog_init_timeout(&wdt->wdd, 0, &adev->dev);
+ wdt_setload(&wdt->wdd, wdt->wdd.timeout);
+
+ /*
+ * If HW is already running, enable/reset the wdt and set the running
+ * bit to tell the wdt subsystem
+ */
+ if (wdt_is_running(&wdt->wdd)) {
+ wdt_enable(&wdt->wdd);
+ set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);
+ }
ret = watchdog_register_device(&wdt->wdd);
if (ret) {
diff --git a/drivers/watchdog/sprd_wdt.c b/drivers/watchdog/sprd_wdt.c
index b4d484a42b70..ff9397d9638a 100644
--- a/drivers/watchdog/sprd_wdt.c
+++ b/drivers/watchdog/sprd_wdt.c
@@ -279,10 +279,8 @@ static int sprd_wdt_probe(struct platform_device *pdev)
wdt_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
wdt->base = devm_ioremap_resource(&pdev->dev, wdt_res);
- if (IS_ERR(wdt->base)) {
- dev_err(&pdev->dev, "failed to map memory resource\n");
+ if (IS_ERR(wdt->base))
return PTR_ERR(wdt->base);
- }
wdt->enable = devm_clk_get(&pdev->dev, "enable");
if (IS_ERR(wdt->enable)) {
diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c
index c97ad5619cb0..e00e3b3526c6 100644
--- a/drivers/watchdog/stm32_iwdg.c
+++ b/drivers/watchdog/stm32_iwdg.c
@@ -11,12 +11,13 @@
#include <linux/clk.h>
#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/watchdog.h>
@@ -54,11 +55,15 @@
#define TIMEOUT_US 100000
#define SLEEP_US 1000
+#define HAS_PCLK true
+
struct stm32_iwdg {
struct watchdog_device wdd;
void __iomem *regs;
- struct clk *clk;
+ struct clk *clk_lsi;
+ struct clk *clk_pclk;
unsigned int rate;
+ bool has_pclk;
};
static inline u32 reg_read(void __iomem *base, u32 reg)
@@ -133,6 +138,44 @@ static int stm32_iwdg_set_timeout(struct watchdog_device *wdd,
return 0;
}
+static int stm32_iwdg_clk_init(struct platform_device *pdev,
+ struct stm32_iwdg *wdt)
+{
+ u32 ret;
+
+ wdt->clk_lsi = devm_clk_get(&pdev->dev, "lsi");
+ if (IS_ERR(wdt->clk_lsi)) {
+ dev_err(&pdev->dev, "Unable to get lsi clock\n");
+ return PTR_ERR(wdt->clk_lsi);
+ }
+
+ /* optional peripheral clock */
+ if (wdt->has_pclk) {
+ wdt->clk_pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(wdt->clk_pclk)) {
+ dev_err(&pdev->dev, "Unable to get pclk clock\n");
+ return PTR_ERR(wdt->clk_pclk);
+ }
+
+ ret = clk_prepare_enable(wdt->clk_pclk);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to prepare pclk clock\n");
+ return ret;
+ }
+ }
+
+ ret = clk_prepare_enable(wdt->clk_lsi);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to prepare lsi clock\n");
+ clk_disable_unprepare(wdt->clk_pclk);
+ return ret;
+ }
+
+ wdt->rate = clk_get_rate(wdt->clk_lsi);
+
+ return 0;
+}
+
static const struct watchdog_info stm32_iwdg_info = {
.options = WDIOF_SETTIMEOUT |
WDIOF_MAGICCLOSE |
@@ -147,49 +190,42 @@ static const struct watchdog_ops stm32_iwdg_ops = {
.set_timeout = stm32_iwdg_set_timeout,
};
+static const struct of_device_id stm32_iwdg_of_match[] = {
+ { .compatible = "st,stm32-iwdg", .data = (void *)!HAS_PCLK },
+ { .compatible = "st,stm32mp1-iwdg", .data = (void *)HAS_PCLK },
+ { /* end node */ }
+};
+MODULE_DEVICE_TABLE(of, stm32_iwdg_of_match);
+
static int stm32_iwdg_probe(struct platform_device *pdev)
{
struct watchdog_device *wdd;
+ const struct of_device_id *match;
struct stm32_iwdg *wdt;
struct resource *res;
- void __iomem *regs;
- struct clk *clk;
int ret;
+ match = of_match_device(stm32_iwdg_of_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
+
+ wdt->has_pclk = match->data;
+
/* This is the timer base. */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- regs = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(regs)) {
+ wdt->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(wdt->regs)) {
dev_err(&pdev->dev, "Could not get resource\n");
- return PTR_ERR(regs);
+ return PTR_ERR(wdt->regs);
}
- clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(clk)) {
- dev_err(&pdev->dev, "Unable to get clock\n");
- return PTR_ERR(clk);
- }
-
- ret = clk_prepare_enable(clk);
- if (ret) {
- dev_err(&pdev->dev, "Unable to prepare clock %p\n", clk);
+ ret = stm32_iwdg_clk_init(pdev, wdt);
+ if (ret)
return ret;
- }
-
- /*
- * Allocate our watchdog driver data, which has the
- * struct watchdog_device nested within it.
- */
- wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
- if (!wdt) {
- ret = -ENOMEM;
- goto err;
- }
-
- /* Initialize struct stm32_iwdg. */
- wdt->regs = regs;
- wdt->clk = clk;
- wdt->rate = clk_get_rate(clk);
/* Initialize struct watchdog_device. */
wdd = &wdt->wdd;
@@ -217,7 +253,8 @@ static int stm32_iwdg_probe(struct platform_device *pdev)
return 0;
err:
- clk_disable_unprepare(clk);
+ clk_disable_unprepare(wdt->clk_lsi);
+ clk_disable_unprepare(wdt->clk_pclk);
return ret;
}
@@ -227,23 +264,18 @@ static int stm32_iwdg_remove(struct platform_device *pdev)
struct stm32_iwdg *wdt = platform_get_drvdata(pdev);
watchdog_unregister_device(&wdt->wdd);
- clk_disable_unprepare(wdt->clk);
+ clk_disable_unprepare(wdt->clk_lsi);
+ clk_disable_unprepare(wdt->clk_pclk);
return 0;
}
-static const struct of_device_id stm32_iwdg_of_match[] = {
- { .compatible = "st,stm32-iwdg" },
- { /* end node */ }
-};
-MODULE_DEVICE_TABLE(of, stm32_iwdg_of_match);
-
static struct platform_driver stm32_iwdg_driver = {
.probe = stm32_iwdg_probe,
.remove = stm32_iwdg_remove,
.driver = {
.name = "iwdg",
- .of_match_table = stm32_iwdg_of_match,
+ .of_match_table = of_match_ptr(stm32_iwdg_of_match),
},
};
module_platform_driver(stm32_iwdg_driver);
diff --git a/drivers/watchdog/stmp3xxx_rtc_wdt.c b/drivers/watchdog/stmp3xxx_rtc_wdt.c
index d8b11eb269ad..994c54cc68e9 100644
--- a/drivers/watchdog/stmp3xxx_rtc_wdt.c
+++ b/drivers/watchdog/stmp3xxx_rtc_wdt.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Watchdog driver for the RTC based watchdog in STMP3xxx and i.MX23/28
*
* Author: Wolfram Sang <kernel@pengutronix.de>
*
* Copyright (C) 2011-12 Wolfram Sang, Pengutronix
- *
- * 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-21 20:37:07 +0300