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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-01 21:16:45 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-01 21:16:45 (GMT)
commit115502a6f31d84d8172a71283aaea266302a8ad5 (patch)
tree5951b551534a40524e502770f8a4d6a1e56772ed /drivers/watchdog
parent57b0e31453209d746c99e513d80b3d0c44a80891 (diff)
parente3c21e088f8936a004a3d9f2f4e14b3f2bdd6ea9 (diff)
Merge tag 'linux-watchdog-4.21-rc1' of git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck: - add TQ-Systems TQMX86 watchdog driver - add Qualcomm PM8916 watchdog driver - w83627hf_wdt: add quirk for Inves system - renesas_wdt: several improvements and document r8a774c0 support - mena21_wdt, mtx-1: Convert to use GPIO descriptor - bcm281xx, ie6xx_wdt: convert to DEFINE_SHOW_ATTRIBUTE - documentation: add PM usage and kernel-api: don't reference removed functions - update bindings for MT7629 SoC - several small fixes * tag 'linux-watchdog-4.21-rc1' of git://www.linux-watchdog.org/linux-watchdog: (22 commits) watchdog: tqmx86: Add watchdog driver for the IO controller dt-bindings: watchdog: renesas-wdt: Document r8a774c0 support watchdog: docs: kernel-api: don't reference removed functions watchdog: add documentation for PM usage watchdog: mtx-1: Convert to use GPIO descriptor watchdog: mena21_wdt: Convert to GPIO descriptors dt-bindings: watchdog: Add Qualcomm PM8916 watchdog watchdog: Add pm8916 watchdog driver dt-bindings: watchdog: update bindings for MT7629 SoC watchdog: renesas_wdt: don't keep timer value during suspend/resume watchdog: ie6xx_wdt: convert to DEFINE_SHOW_ATTRIBUTE watchdog: bcm281xx: convert to DEFINE_SHOW_ATTRIBUTE watchdog: asm9260_wdt: make array mode_name static, shrinks object size watchdog/hpwdt: Update driver version. watchdog/hpwdt: Do not claim unsupported hardware watchdog/hpwdt: Exclude via blacklist Watchdog: remove outdated comment watchdog: w83627hf_wdt: Add quirk for Inves system watchdog: cpwd: add of_node_put() watchdog: renesas_wdt: don't set divider while watchdog is running ...
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/Kconfig22
-rw-r--r--drivers/watchdog/Makefile2
-rw-r--r--drivers/watchdog/asm9260_wdt.c2
-rw-r--r--drivers/watchdog/bcm_kona_wdt.c16
-rw-r--r--drivers/watchdog/cpwd.c2
-rw-r--r--drivers/watchdog/hpwdt.c15
-rw-r--r--drivers/watchdog/ie6xx_wdt.c16
-rw-r--r--drivers/watchdog/mena21_wdt.c73
-rw-r--r--drivers/watchdog/mtx-1_wdt.c19
-rw-r--r--drivers/watchdog/pm8916_wdt.c211
-rw-r--r--drivers/watchdog/renesas_wdt.c24
-rw-r--r--drivers/watchdog/tqmx86_wdt.c126
-rw-r--r--drivers/watchdog/w83627hf_wdt.c38
13 files changed, 471 insertions, 95 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 2d64333..57f017d 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -538,7 +538,7 @@ config COH901327_WATCHDOG
config NPCM7XX_WATCHDOG
bool "Nuvoton NPCM750 watchdog"
depends on ARCH_NPCM || COMPILE_TEST
- default y if ARCH_NPCM750
+ default y if ARCH_NPCM7XX
select WATCHDOG_CORE
help
Say Y here to include Watchdog timer support for the
@@ -847,6 +847,14 @@ config SPRD_WATCHDOG
Say Y here to include watchdog timer supported
by Spreadtrum system.
+config PM8916_WATCHDOG
+ tristate "QCOM PM8916 pmic watchdog"
+ depends on OF && MFD_SPMI_PMIC
+ select WATCHDOG_CORE
+ help
+ Say Y here to include support watchdog timer embedded into the
+ pm8916 module.
+
# X86 (i386 + ia64 + x86_64) Architecture
config ACQUIRE_WDT
@@ -1308,6 +1316,18 @@ config SMSC37B787_WDT
Most people will say N.
+config TQMX86_WDT
+ tristate "TQ-Systems TQMX86 Watchdog Timer"
+ depends on X86
+ help
+ This is the driver for the hardware watchdog timer in the TQMX86 IO
+ controller found on some of their ComExpress Modules.
+
+ To compile this driver as a module, choose M here; the module
+ will be called tqmx86_wdt.
+
+ Most people will say N.
+
config VIA_WDT
tristate "VIA Watchdog Timer"
depends on X86 && PCI
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index f69cdff..a0917ef 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -92,6 +92,7 @@ obj-$(CONFIG_STM32_WATCHDOG) += stm32_iwdg.o
obj-$(CONFIG_UNIPHIER_WATCHDOG) += uniphier_wdt.o
obj-$(CONFIG_RTD119X_WATCHDOG) += rtd119x_wdt.o
obj-$(CONFIG_SPRD_WATCHDOG) += sprd_wdt.o
+obj-$(CONFIG_PM8916_WATCHDOG) += pm8916_wdt.o
# X86 (i386 + ia64 + x86_64) Architecture
obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
@@ -129,6 +130,7 @@ obj-$(CONFIG_SBC7240_WDT) += sbc7240_wdt.o
obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
obj-$(CONFIG_SMSC_SCH311X_WDT) += sch311x_wdt.o
obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
+obj-$(CONFIG_TQMX86_WDT) += tqmx86_wdt.o
obj-$(CONFIG_VIA_WDT) += via_wdt.o
obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
diff --git a/drivers/watchdog/asm9260_wdt.c b/drivers/watchdog/asm9260_wdt.c
index 2cf56b4..9768e44 100644
--- a/drivers/watchdog/asm9260_wdt.c
+++ b/drivers/watchdog/asm9260_wdt.c
@@ -278,7 +278,7 @@ static int asm9260_wdt_probe(struct platform_device *pdev)
struct watchdog_device *wdd;
struct resource *res;
int ret;
- const char * const mode_name[] = { "hw", "sw", "debug", };
+ static const char * const mode_name[] = { "hw", "sw", "debug", };
priv = devm_kzalloc(&pdev->dev, sizeof(struct asm9260_wdt_priv),
GFP_KERNEL);
diff --git a/drivers/watchdog/bcm_kona_wdt.c b/drivers/watchdog/bcm_kona_wdt.c
index 1462be9..4249b47 100644
--- a/drivers/watchdog/bcm_kona_wdt.c
+++ b/drivers/watchdog/bcm_kona_wdt.c
@@ -90,7 +90,7 @@ static int secure_register_read(struct bcm_kona_wdt *wdt, uint32_t offset)
#ifdef CONFIG_BCM_KONA_WDT_DEBUG
-static int bcm_kona_wdt_dbg_show(struct seq_file *s, void *data)
+static int bcm_kona_show(struct seq_file *s, void *data)
{
int ctl_val, cur_val;
unsigned long flags;
@@ -130,17 +130,7 @@ static int bcm_kona_wdt_dbg_show(struct seq_file *s, void *data)
return 0;
}
-static int bcm_kona_dbg_open(struct inode *inode, struct file *file)
-{
- return single_open(file, bcm_kona_wdt_dbg_show, inode->i_private);
-}
-
-static const struct file_operations bcm_kona_dbg_operations = {
- .open = bcm_kona_dbg_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(bcm_kona);
static void bcm_kona_wdt_debug_init(struct platform_device *pdev)
{
@@ -157,7 +147,7 @@ static void bcm_kona_wdt_debug_init(struct platform_device *pdev)
return;
if (debugfs_create_file("info", S_IFREG | S_IRUGO, dir, wdt,
- &bcm_kona_dbg_operations))
+ &bcm_kona_fops))
wdt->debugfs = dir;
else
debugfs_remove_recursive(dir);
diff --git a/drivers/watchdog/cpwd.c b/drivers/watchdog/cpwd.c
index aee0b25..32156e1 100644
--- a/drivers/watchdog/cpwd.c
+++ b/drivers/watchdog/cpwd.c
@@ -570,6 +570,8 @@ static int cpwd_probe(struct platform_device *op)
if (str_prop)
p->timeout = simple_strtoul(str_prop, NULL, 10);
+ of_node_put(options);
+
/* CP1400s seem to have broken PLD implementations-- the
* interrupt_mask register cannot be written, so no timer
* interrupts can be masked within the PLD.
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 9356230..ef30c7e 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -26,7 +26,7 @@
#include <linux/watchdog.h>
#include <asm/nmi.h>
-#define HPWDT_VERSION "2.0.1"
+#define HPWDT_VERSION "2.0.2"
#define SECS_TO_TICKS(secs) ((secs) * 1000 / 128)
#define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000)
#define HPWDT_MAX_TIMER TICKS_TO_SECS(65535)
@@ -50,6 +50,11 @@ static const struct pci_device_id hpwdt_devices[] = {
};
MODULE_DEVICE_TABLE(pci, hpwdt_devices);
+static const struct pci_device_id hpwdt_blacklist[] = {
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3306, PCI_VENDOR_ID_HP, 0x1979) }, /* auxilary iLO */
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3306, PCI_VENDOR_ID_HP_3PAR, 0x0289) }, /* CL */
+ {0}, /* terminate list */
+};
/*
* Watchdog operations
@@ -274,12 +279,10 @@ static int hpwdt_init_one(struct pci_dev *dev,
return -ENODEV;
}
- /*
- * Ignore all auxilary iLO devices with the following PCI ID
- */
- if (dev->subsystem_vendor == PCI_VENDOR_ID_HP &&
- dev->subsystem_device == 0x1979)
+ if (pci_match_id(hpwdt_blacklist, dev)) {
+ dev_dbg(&dev->dev, "Not supported on this device\n");
return -ENODEV;
+ }
if (pci_enable_device(dev)) {
dev_warn(&dev->dev,
diff --git a/drivers/watchdog/ie6xx_wdt.c b/drivers/watchdog/ie6xx_wdt.c
index 78c2541..8de9fb1 100644
--- a/drivers/watchdog/ie6xx_wdt.c
+++ b/drivers/watchdog/ie6xx_wdt.c
@@ -193,7 +193,7 @@ static struct watchdog_device ie6xx_wdt_dev = {
#ifdef CONFIG_DEBUG_FS
-static int ie6xx_wdt_dbg_show(struct seq_file *s, void *unused)
+static int ie6xx_wdt_show(struct seq_file *s, void *unused)
{
seq_printf(s, "PV1 = 0x%08x\n",
inl(ie6xx_wdt_data.sch_wdtba + PV1));
@@ -212,23 +212,13 @@ static int ie6xx_wdt_dbg_show(struct seq_file *s, void *unused)
return 0;
}
-static int ie6xx_wdt_dbg_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ie6xx_wdt_dbg_show, NULL);
-}
-
-static const struct file_operations ie6xx_wdt_dbg_operations = {
- .open = ie6xx_wdt_dbg_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(ie6xx_wdt);
static void ie6xx_wdt_debugfs_init(void)
{
/* /sys/kernel/debug/ie6xx_wdt */
ie6xx_wdt_data.debugfs = debugfs_create_file("ie6xx_wdt",
- S_IFREG | S_IRUGO, NULL, NULL, &ie6xx_wdt_dbg_operations);
+ S_IFREG | S_IRUGO, NULL, NULL, &ie6xx_wdt_fops);
}
static void ie6xx_wdt_debugfs_exit(void)
diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c
index 0be7f50..6db6988 100644
--- a/drivers/watchdog/mena21_wdt.c
+++ b/drivers/watchdog/mena21_wdt.c
@@ -13,10 +13,10 @@
#include <linux/platform_device.h>
#include <linux/watchdog.h>
#include <linux/uaccess.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/bitops.h>
+#include <linux/of.h>
#define NUM_GPIOS 6
@@ -31,7 +31,7 @@ enum a21_wdt_gpios {
struct a21_wdt_drv {
struct watchdog_device wdt;
- unsigned gpios[NUM_GPIOS];
+ struct gpio_desc *gpios[NUM_GPIOS];
};
static bool nowayout = WATCHDOG_NOWAYOUT;
@@ -43,9 +43,9 @@ static unsigned int a21_wdt_get_bootstatus(struct a21_wdt_drv *drv)
{
int reset = 0;
- reset |= gpio_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0;
- reset |= gpio_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0;
- reset |= gpio_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0;
+ reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0;
+ reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0;
+ reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0;
return reset;
}
@@ -54,7 +54,7 @@ static int a21_wdt_start(struct watchdog_device *wdt)
{
struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt);
- gpio_set_value(drv->gpios[GPIO_WD_ENAB], 1);
+ gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 1);
return 0;
}
@@ -63,7 +63,7 @@ static int a21_wdt_stop(struct watchdog_device *wdt)
{
struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt);
- gpio_set_value(drv->gpios[GPIO_WD_ENAB], 0);
+ gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0);
return 0;
}
@@ -72,9 +72,9 @@ static int a21_wdt_ping(struct watchdog_device *wdt)
{
struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt);
- gpio_set_value(drv->gpios[GPIO_WD_TRIG], 0);
+ gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 0);
ndelay(10);
- gpio_set_value(drv->gpios[GPIO_WD_TRIG], 1);
+ gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 1);
return 0;
}
@@ -96,9 +96,9 @@ static int a21_wdt_set_timeout(struct watchdog_device *wdt,
}
if (timeout == 1)
- gpio_set_value(drv->gpios[GPIO_WD_FAST], 1);
+ gpiod_set_value(drv->gpios[GPIO_WD_FAST], 1);
else
- gpio_set_value(drv->gpios[GPIO_WD_FAST], 0);
+ gpiod_set_value(drv->gpios[GPIO_WD_FAST], 0);
wdt->timeout = timeout;
@@ -127,7 +127,6 @@ static struct watchdog_device a21_wdt = {
static int a21_wdt_probe(struct platform_device *pdev)
{
- struct device_node *node;
struct a21_wdt_drv *drv;
unsigned int reset = 0;
int num_gpios;
@@ -138,40 +137,40 @@ static int a21_wdt_probe(struct platform_device *pdev)
if (!drv)
return -ENOMEM;
- /* Fill GPIO pin array */
- node = pdev->dev.of_node;
-
- num_gpios = of_gpio_count(node);
+ num_gpios = gpiod_count(&pdev->dev, NULL);
if (num_gpios != NUM_GPIOS) {
dev_err(&pdev->dev, "gpios DT property wrong, got %d want %d",
num_gpios, NUM_GPIOS);
return -ENODEV;
}
- for (i = 0; i < num_gpios; i++) {
- int val;
-
- val = of_get_gpio(node, i);
- if (val < 0)
- return val;
-
- drv->gpios[i] = val;
- }
-
/* Request the used GPIOs */
for (i = 0; i < num_gpios; i++) {
- ret = devm_gpio_request(&pdev->dev, drv->gpios[i],
- "MEN A21 Watchdog");
- if (ret)
- return ret;
+ enum gpiod_flags gflags;
if (i < GPIO_WD_RST0)
- ret = gpio_direction_output(drv->gpios[i],
- gpio_get_value(drv->gpios[i]));
- else /* GPIO_WD_RST[0..2] are inputs */
- ret = gpio_direction_input(drv->gpios[i]);
- if (ret)
+ gflags = GPIOD_ASIS;
+ else
+ gflags = GPIOD_IN;
+ drv->gpios[i] = devm_gpiod_get_index(&pdev->dev, NULL, i,
+ gflags);
+ if (IS_ERR(drv->gpios[i])) {
+ ret = PTR_ERR(drv->gpios[i]);
return ret;
+ }
+
+ gpiod_set_consumer_name(drv->gpios[i], "MEN A21 Watchdog");
+
+ /*
+ * Retrieve the initial value from the GPIOs that should be
+ * output, then set up the line as output with that value.
+ */
+ if (i < GPIO_WD_RST0) {
+ int val;
+
+ val = gpiod_get_value(drv->gpios[i]);
+ gpiod_direction_output(drv->gpios[i], val);
+ }
}
watchdog_init_timeout(&a21_wdt, 30, &pdev->dev);
@@ -207,7 +206,7 @@ static void a21_wdt_shutdown(struct platform_device *pdev)
{
struct a21_wdt_drv *drv = dev_get_drvdata(&pdev->dev);
- gpio_set_value(drv->gpios[GPIO_WD_ENAB], 0);
+ gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0);
}
static const struct of_device_id a21_wdt_ids[] = {
diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
index 1fa7d2b..e028e0a 100644
--- a/drivers/watchdog/mtx-1_wdt.c
+++ b/drivers/watchdog/mtx-1_wdt.c
@@ -39,7 +39,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/uaccess.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <asm/mach-au1x00/au1000.h>
@@ -55,7 +55,7 @@ static struct {
int queue;
int default_ticks;
unsigned long inuse;
- unsigned gpio;
+ struct gpio_desc *gpiod;
unsigned int gstate;
} mtx1_wdt_device;
@@ -67,7 +67,7 @@ static void mtx1_wdt_trigger(struct timer_list *unused)
/* toggle wdt gpio */
mtx1_wdt_device.gstate = !mtx1_wdt_device.gstate;
- gpio_set_value(mtx1_wdt_device.gpio, mtx1_wdt_device.gstate);
+ gpiod_set_value(mtx1_wdt_device.gpiod, mtx1_wdt_device.gstate);
if (mtx1_wdt_device.queue && ticks)
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
@@ -90,7 +90,7 @@ static void mtx1_wdt_start(void)
if (!mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 1;
mtx1_wdt_device.gstate = 1;
- gpio_set_value(mtx1_wdt_device.gpio, 1);
+ gpiod_set_value(mtx1_wdt_device.gpiod, 1);
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
}
mtx1_wdt_device.running++;
@@ -105,7 +105,7 @@ static int mtx1_wdt_stop(void)
if (mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 0;
mtx1_wdt_device.gstate = 0;
- gpio_set_value(mtx1_wdt_device.gpio, 0);
+ gpiod_set_value(mtx1_wdt_device.gpiod, 0);
}
ticks = mtx1_wdt_device.default_ticks;
spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags);
@@ -198,12 +198,11 @@ static int mtx1_wdt_probe(struct platform_device *pdev)
{
int ret;
- mtx1_wdt_device.gpio = pdev->resource[0].start;
- ret = devm_gpio_request_one(&pdev->dev, mtx1_wdt_device.gpio,
- GPIOF_OUT_INIT_HIGH, "mtx1-wdt");
- if (ret < 0) {
+ mtx1_wdt_device.gpiod = devm_gpiod_get(&pdev->dev,
+ NULL, GPIOD_OUT_HIGH);
+ if (IS_ERR(mtx1_wdt_device.gpiod)) {
dev_err(&pdev->dev, "failed to request gpio");
- return ret;
+ return PTR_ERR(mtx1_wdt_device.gpiod);
}
spin_lock_init(&mtx1_wdt_device.lock);
diff --git a/drivers/watchdog/pm8916_wdt.c b/drivers/watchdog/pm8916_wdt.c
new file mode 100644
index 0000000..7f10041
--- /dev/null
+++ b/drivers/watchdog/pm8916_wdt.c
@@ -0,0 +1,211 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/property.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/watchdog.h>
+
+#define PON_INT_RT_STS 0x10
+#define PMIC_WD_BARK_STS_BIT BIT(6)
+
+#define PON_PMIC_WD_RESET_S1_TIMER 0x54
+#define PON_PMIC_WD_RESET_S2_TIMER 0x55
+
+#define PON_PMIC_WD_RESET_S2_CTL 0x56
+#define RESET_TYPE_WARM 0x01
+#define RESET_TYPE_SHUTDOWN 0x04
+#define RESET_TYPE_HARD 0x07
+
+#define PON_PMIC_WD_RESET_S2_CTL2 0x57
+#define S2_RESET_EN_BIT BIT(7)
+
+#define PON_PMIC_WD_RESET_PET 0x58
+#define WATCHDOG_PET_BIT BIT(0)
+
+#define PM8916_WDT_DEFAULT_TIMEOUT 32
+#define PM8916_WDT_MIN_TIMEOUT 1
+#define PM8916_WDT_MAX_TIMEOUT 127
+
+struct pm8916_wdt {
+ struct regmap *regmap;
+ struct watchdog_device wdev;
+ u32 baseaddr;
+};
+
+static int pm8916_wdt_start(struct watchdog_device *wdev)
+{
+ struct pm8916_wdt *wdt = watchdog_get_drvdata(wdev);
+
+ return regmap_update_bits(wdt->regmap,
+ wdt->baseaddr + PON_PMIC_WD_RESET_S2_CTL2,
+ S2_RESET_EN_BIT, S2_RESET_EN_BIT);
+}
+
+static int pm8916_wdt_stop(struct watchdog_device *wdev)
+{
+ struct pm8916_wdt *wdt = watchdog_get_drvdata(wdev);
+
+ return regmap_update_bits(wdt->regmap,
+ wdt->baseaddr + PON_PMIC_WD_RESET_S2_CTL2,
+ S2_RESET_EN_BIT, 0);
+}
+
+static int pm8916_wdt_ping(struct watchdog_device *wdev)
+{
+ struct pm8916_wdt *wdt = watchdog_get_drvdata(wdev);
+
+ return regmap_update_bits(wdt->regmap,
+ wdt->baseaddr + PON_PMIC_WD_RESET_PET,
+ WATCHDOG_PET_BIT, WATCHDOG_PET_BIT);
+}
+
+static int pm8916_wdt_configure_timers(struct watchdog_device *wdev)
+{
+ struct pm8916_wdt *wdt = watchdog_get_drvdata(wdev);
+ int err;
+
+ err = regmap_write(wdt->regmap,
+ wdt->baseaddr + PON_PMIC_WD_RESET_S1_TIMER,
+ wdev->timeout - wdev->pretimeout);
+ if (err)
+ return err;
+
+ return regmap_write(wdt->regmap,
+ wdt->baseaddr + PON_PMIC_WD_RESET_S2_TIMER,
+ wdev->pretimeout);
+}
+
+static int pm8916_wdt_set_timeout(struct watchdog_device *wdev,
+ unsigned int timeout)
+{
+ wdev->timeout = timeout;
+
+ return pm8916_wdt_configure_timers(wdev);
+}
+
+static int pm8916_wdt_set_pretimeout(struct watchdog_device *wdev,
+ unsigned int pretimeout)
+{
+ wdev->pretimeout = pretimeout;
+
+ return pm8916_wdt_configure_timers(wdev);
+}
+
+static irqreturn_t pm8916_wdt_isr(int irq, void *arg)
+{
+ struct pm8916_wdt *wdt = arg;
+ int err, sts;
+
+ err = regmap_read(wdt->regmap, wdt->baseaddr + PON_INT_RT_STS, &sts);
+ if (err)
+ return IRQ_HANDLED;
+
+ if (sts & PMIC_WD_BARK_STS_BIT)
+ watchdog_notify_pretimeout(&wdt->wdev);
+
+ return IRQ_HANDLED;
+}
+
+static const struct watchdog_info pm8916_wdt_ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+ .identity = "QCOM PM8916 PON WDT",
+};
+
+static const struct watchdog_info pm8916_wdt_pt_ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE |
+ WDIOF_PRETIMEOUT,
+ .identity = "QCOM PM8916 PON WDT",
+};
+
+static const struct watchdog_ops pm8916_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = pm8916_wdt_start,
+ .stop = pm8916_wdt_stop,
+ .ping = pm8916_wdt_ping,
+ .set_timeout = pm8916_wdt_set_timeout,
+ .set_pretimeout = pm8916_wdt_set_pretimeout,
+};
+
+static int pm8916_wdt_probe(struct platform_device *pdev)
+{
+ struct pm8916_wdt *wdt;
+ struct device *parent;
+ int err, irq;
+
+ wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
+
+ parent = pdev->dev.parent;
+
+ /*
+ * The pm8916-pon-wdt is a child of the pon device, which is a child
+ * of the pm8916 mfd device. We want access to the pm8916 registers.
+ * Retrieve regmap from pm8916 (parent->parent) and base address
+ * from pm8916-pon (pon).
+ */
+ wdt->regmap = dev_get_regmap(parent->parent, NULL);
+ if (!wdt->regmap) {
+ dev_err(&pdev->dev, "failed to locate regmap\n");
+ return -ENODEV;
+ }
+
+ err = device_property_read_u32(parent, "reg", &wdt->baseaddr);
+ if (err) {
+ dev_err(&pdev->dev, "failed to get pm8916-pon address\n");
+ return err;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq > 0) {
+ if (devm_request_irq(&pdev->dev, irq, pm8916_wdt_isr, 0,
+ "pm8916_wdt", wdt))
+ irq = 0;
+ }
+
+ /* Configure watchdog to hard-reset mode */
+ err = regmap_write(wdt->regmap,
+ wdt->baseaddr + PON_PMIC_WD_RESET_S2_CTL,
+ RESET_TYPE_HARD);
+ if (err) {
+ dev_err(&pdev->dev, "failed configure watchdog\n");
+ return err;
+ }
+
+ wdt->wdev.info = (irq > 0) ? &pm8916_wdt_pt_ident : &pm8916_wdt_ident,
+ wdt->wdev.ops = &pm8916_wdt_ops,
+ wdt->wdev.parent = &pdev->dev;
+ wdt->wdev.min_timeout = PM8916_WDT_MIN_TIMEOUT;
+ wdt->wdev.max_timeout = PM8916_WDT_MAX_TIMEOUT;
+ wdt->wdev.timeout = PM8916_WDT_DEFAULT_TIMEOUT;
+ wdt->wdev.pretimeout = 0;
+ watchdog_set_drvdata(&wdt->wdev, wdt);
+
+ watchdog_init_timeout(&wdt->wdev, 0, &pdev->dev);
+ pm8916_wdt_configure_timers(&wdt->wdev);
+
+ return devm_watchdog_register_device(&pdev->dev, &wdt->wdev);
+}
+
+static const struct of_device_id pm8916_wdt_id_table[] = {
+ { .compatible = "qcom,pm8916-wdt" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pm8916_wdt_id_table);
+
+static struct platform_driver pm8916_wdt_driver = {
+ .probe = pm8916_wdt_probe,
+ .driver = {
+ .name = "pm8916-wdt",
+ .of_match_table = of_match_ptr(pm8916_wdt_id_table),
+ },
+};
+module_platform_driver(pm8916_wdt_driver);
+
+MODULE_AUTHOR("Loic Poulain <loic.poulain@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm pm8916 watchdog driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c
index 0d74c3e..622ede5 100644
--- a/drivers/watchdog/renesas_wdt.c
+++ b/drivers/watchdog/renesas_wdt.c
@@ -48,7 +48,6 @@ struct rwdt_priv {
void __iomem *base;
struct watchdog_device wdev;
unsigned long clk_rate;
- u16 time_left;
u8 cks;
};
@@ -74,12 +73,17 @@ static int rwdt_init_timeout(struct watchdog_device *wdev)
static int rwdt_start(struct watchdog_device *wdev)
{
struct rwdt_priv *priv = watchdog_get_drvdata(wdev);
+ u8 val;
pm_runtime_get_sync(wdev->parent);
- rwdt_write(priv, 0, RWTCSRB);
- rwdt_write(priv, priv->cks, RWTCSRA);
+ /* Stop the timer before we modify any register */
+ val = readb_relaxed(priv->base + RWTCSRA) & ~RWTCSRA_TME;
+ rwdt_write(priv, val, RWTCSRA);
+
rwdt_init_timeout(wdev);
+ rwdt_write(priv, priv->cks, RWTCSRA);
+ rwdt_write(priv, 0, RWTCSRB);
while (readb_relaxed(priv->base + RWTCSRA) & RWTCSRA_WRFLG)
cpu_relax();
@@ -220,8 +224,8 @@ static int rwdt_probe(struct platform_device *pdev)
goto out_pm_disable;
}
- priv->wdev.info = &rwdt_ident,
- priv->wdev.ops = &rwdt_ops,
+ priv->wdev.info = &rwdt_ident;
+ priv->wdev.ops = &rwdt_ops;
priv->wdev.parent = &pdev->dev;
priv->wdev.min_timeout = 1;
priv->wdev.max_timeout = DIV_BY_CLKS_PER_SEC(priv, 65536);
@@ -263,10 +267,9 @@ static int __maybe_unused rwdt_suspend(struct device *dev)
{
struct rwdt_priv *priv = dev_get_drvdata(dev);
- if (watchdog_active(&priv->wdev)) {
- priv->time_left = readw(priv->base + RWTCNT);
+ if (watchdog_active(&priv->wdev))
rwdt_stop(&priv->wdev);
- }
+
return 0;
}
@@ -274,10 +277,9 @@ static int __maybe_unused rwdt_resume(struct device *dev)
{
struct rwdt_priv *priv = dev_get_drvdata(dev);
- if (watchdog_active(&priv->wdev)) {
+ if (watchdog_active(&priv->wdev))
rwdt_start(&priv->wdev);
- rwdt_write(priv, priv->time_left, RWTCNT);
- }
+
return 0;
}
diff --git a/drivers/watchdog/tqmx86_wdt.c b/drivers/watchdog/tqmx86_wdt.c
new file mode 100644
index 0000000..0d3a0fb
--- /dev/null
+++ b/drivers/watchdog/tqmx86_wdt.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Watchdog driver for TQMx86 PLD.
+ *
+ * The watchdog supports power of 2 timeouts from 1 to 4096sec.
+ * Once started, it cannot be stopped.
+ *
+ * Based on the vendor code written by Vadim V.Vlasov
+ * <vvlasov@dev.rtsoft.ru>
+ */
+
+#include <linux/io.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/timer.h>
+#include <linux/watchdog.h>
+
+/* default timeout (secs) */
+#define WDT_TIMEOUT 32
+
+static unsigned int timeout;
+module_param(timeout, uint, 0);
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1<=timeout<=4096, default="
+ __MODULE_STRING(WDT_TIMEOUT) ")");
+struct tqmx86_wdt {
+ struct watchdog_device wdd;
+ void __iomem *io_base;
+};
+
+#define TQMX86_WDCFG 0x00 /* Watchdog Configuration Register */
+#define TQMX86_WDCS 0x01 /* Watchdog Config/Status Register */
+
+static int tqmx86_wdt_start(struct watchdog_device *wdd)
+{
+ struct tqmx86_wdt *priv = watchdog_get_drvdata(wdd);
+
+ iowrite8(0x81, priv->io_base + TQMX86_WDCS);
+
+ return 0;
+}
+
+static int tqmx86_wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
+{
+ struct tqmx86_wdt *priv = watchdog_get_drvdata(wdd);
+ u8 val;
+
+ t = roundup_pow_of_two(t);
+ val = ilog2(t) | 0x90;
+ val += 3; /* values 0,1,2 correspond to 0.125,0.25,0.5s timeouts */
+ iowrite8(val, priv->io_base + TQMX86_WDCFG);
+
+ wdd->timeout = t;
+
+ return 0;
+}
+
+static const struct watchdog_info tqmx86_wdt_info = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING,
+ .identity = "TQMx86 Watchdog",
+};
+
+static struct watchdog_ops tqmx86_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = tqmx86_wdt_start,
+ .set_timeout = tqmx86_wdt_set_timeout,
+};
+
+static int tqmx86_wdt_probe(struct platform_device *pdev)
+{
+ struct tqmx86_wdt *priv;
+ struct resource *res;
+ int err;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (IS_ERR(res))
+ return PTR_ERR(res);
+
+ priv->io_base = devm_ioport_map(&pdev->dev, res->start,
+ resource_size(res));
+ if (IS_ERR(priv->io_base))
+ return PTR_ERR(priv->io_base);
+
+ watchdog_set_drvdata(&priv->wdd, priv);
+
+ priv->wdd.parent = &pdev->dev;
+ priv->wdd.info = &tqmx86_wdt_info;
+ priv->wdd.ops = &tqmx86_wdt_ops;
+ priv->wdd.min_timeout = 1;
+ priv->wdd.max_timeout = 4096;
+ priv->wdd.max_hw_heartbeat_ms = 4096*1000;
+ priv->wdd.timeout = WDT_TIMEOUT;
+
+ watchdog_init_timeout(&priv->wdd, timeout, &pdev->dev);
+ watchdog_set_nowayout(&priv->wdd, WATCHDOG_NOWAYOUT);
+
+ tqmx86_wdt_set_timeout(&priv->wdd, priv->wdd.timeout);
+
+ err = devm_watchdog_register_device(&pdev->dev, &priv->wdd);
+ if (err)
+ return err;
+
+ dev_info(&pdev->dev, "TQMx86 watchdog\n");
+
+ return 0;
+}
+
+static struct platform_driver tqmx86_wdt_driver = {
+ .driver = {
+ .name = "tqmx86-wdt",
+ },
+ .probe = tqmx86_wdt_probe,
+};
+
+module_platform_driver(tqmx86_wdt_driver);
+
+MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
+MODULE_DESCRIPTION("TQMx86 Watchdog");
+MODULE_ALIAS("platform:tqmx86-wdt");
+MODULE_LICENSE("GPL");
diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 4b9365d..3a49ba9 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -38,6 +38,7 @@
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/dmi.h>
#define WATCHDOG_NAME "w83627hf/thf/hg/dhg WDT"
#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
@@ -46,6 +47,8 @@ static int wdt_io;
static int cr_wdt_timeout; /* WDT timeout register */
static int cr_wdt_control; /* WDT control register */
static int cr_wdt_csr; /* WDT control & status register */
+static int wdt_cfg_enter = 0x87;/* key to unlock configuration space */
+static int wdt_cfg_leave = 0xAA;/* key to lock configuration space */
enum chips { w83627hf, w83627s, w83697hf, w83697ug, w83637hf, w83627thf,
w83687thf, w83627ehf, w83627dhg, w83627uhg, w83667hg, w83627dhg_p,
@@ -130,8 +133,8 @@ static int superio_enter(void)
if (!request_muxed_region(wdt_io, 2, WATCHDOG_NAME))
return -EBUSY;
- outb_p(0x87, WDT_EFER); /* Enter extended function mode */
- outb_p(0x87, WDT_EFER); /* Again according to manual */
+ outb_p(wdt_cfg_enter, WDT_EFER); /* Enter extended function mode */
+ outb_p(wdt_cfg_enter, WDT_EFER); /* Again according to manual */
return 0;
}
@@ -143,7 +146,7 @@ static void superio_select(int ld)
static void superio_exit(void)
{
- outb_p(0xAA, WDT_EFER); /* Leave extended function mode */
+ outb_p(wdt_cfg_leave, WDT_EFER); /* Leave extended function mode */
release_region(wdt_io, 2);
}
@@ -430,6 +433,32 @@ static int wdt_find(int addr)
return ret;
}
+/*
+ * On some systems, the NCT6791D comes with a companion chip and the
+ * watchdog function is in this companion chip. We must use a different
+ * unlocking sequence to access the companion chip.
+ */
+static int __init wdt_use_alt_key(const struct dmi_system_id *d)
+{
+ wdt_cfg_enter = 0x88;
+ wdt_cfg_leave = 0xBB;
+
+ return 0;
+}
+
+static const struct dmi_system_id wdt_dmi_table[] __initconst = {
+ {
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "INVES"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CTS"),
+ DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "INVES"),
+ DMI_EXACT_MATCH(DMI_BOARD_NAME, "SHARKBAY"),
+ },
+ .callback = wdt_use_alt_key,
+ },
+ {}
+};
+
static int __init wdt_init(void)
{
int ret;
@@ -459,6 +488,9 @@ static int __init wdt_init(void)
"NCT6102",
};
+ /* Apply system-specific quirks */
+ dmi_check_system(wdt_dmi_table);
+
wdt_io = 0x2e;
chip = wdt_find(0x2e);
if (chip < 0) {

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