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)
return -ENOMEM;
wdt->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(wdt->base))
return PTR_ERR(wdt->base);
wdt->clk = devm_clk_get(dev, NULL);
if (IS_ERR(wdt->clk))
return PTR_ERR(wdt->clk);
dc_wdt_wdd.max_timeout = U32_MAX / clk_get_rate(wdt->clk);
dc_wdt_wdd.timeout = dc_wdt_wdd.max_timeout;
dc_wdt_wdd.parent = dev;
spin_lock_init(&wdt->lock);
watchdog_set_drvdata(&dc_wdt_wdd, wdt);
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;
}
static int __init wdt_init(void)
{
int ret;
int chip;
static const char * const chip_name[] = {
"W83627HF",
"W83627S",
"W83697HF",
"W83697UG",
"W83637HF",
"W83627THF",
"W83687THF",
"W83627EHF",
"W83627DHG",
"W83627UHG",
"W83667HG",
"W83667DHG-P",
"W83667HG-B",
"NCT6775",
"NCT6776",
"NCT6779",
"NCT6791",
"NCT6792",
"NCT6793",
"NCT6795",
"NCT6102",
};
wdt_io = 0x2e;
chip = wdt_find(0x2e);
if (chip < 0) {
wdt_io = 0x4e;
chip = wdt_find(0x4e);
if (chip < 0)
return chip;
}
pr_info("WDT driver for %s Super I/O chip initialising\n",
chip_name[chip]);
watchdog_init_timeout(&wdt_dev, timeout, NULL);
watchdog_set_nowayout(&wdt_dev, nowayout);
watchdog_stop_on_reboot(&wdt_dev);
ret = w83627hf_init(&wdt_dev, chip);
if (ret) {
pr_err("failed to initialize watchdog (err=%d)\n", ret);
return ret;
}
ret = watchdog_register_device(&wdt_dev);
if (ret)
return ret;
pr_info("initialized. timeout=%d sec (nowayout=%d)\n",
wdt_dev.timeout, nowayout);
return ret;
}
static int bcm2835_wdt_probe(struct platform_device *pdev)
{
struct resource *res;
struct device *dev = &pdev->dev;
struct bcm2835_wdt *wdt;
int err;
wdt = devm_kzalloc(dev, sizeof(struct bcm2835_wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
platform_set_drvdata(pdev, wdt);
spin_lock_init(&wdt->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
wdt->base = devm_ioremap_resource(dev, res);
if (IS_ERR(wdt->base))
return PTR_ERR(wdt->base);
watchdog_set_drvdata(&bcm2835_wdt_wdd, wdt);
watchdog_init_timeout(&bcm2835_wdt_wdd, heartbeat, dev);
watchdog_set_nowayout(&bcm2835_wdt_wdd, nowayout);
bcm2835_wdt_wdd.parent = dev;
if (bcm2835_wdt_is_running(wdt)) {
/*
* The currently active timeout value (set by the
* bootloader) may be different from the module
* heartbeat parameter or the value in device
* tree. But we just need to set WDOG_HW_RUNNING,
* because then the framework will "immediately" ping
* the device, updating the timeout.
*/
set_bit(WDOG_HW_RUNNING, &bcm2835_wdt_wdd.status);
}
watchdog_set_restart_priority(&bcm2835_wdt_wdd, 128);
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");
return err;
}
if (pm_power_off == NULL)
pm_power_off = bcm2835_power_off;
dev_info(dev, "Broadcom BCM2835 watchdog timer");
return 0;
}
static int uniphier_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct uniphier_wdt_dev *wdev;
struct regmap *regmap;
struct device_node *parent;
int ret;
wdev = devm_kzalloc(dev, sizeof(*wdev), GFP_KERNEL);
if (!wdev)
return -ENOMEM;
platform_set_drvdata(pdev, wdev);
parent = of_get_parent(dev->of_node); /* parent should be syscon node */
regmap = syscon_node_to_regmap(parent);
of_node_put(parent);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
wdev->regmap = regmap;
wdev->wdt_dev.info = &uniphier_wdt_info;
wdev->wdt_dev.ops = &uniphier_wdt_ops;
wdev->wdt_dev.max_timeout = WDT_PERIOD_MAX;
wdev->wdt_dev.min_timeout = WDT_PERIOD_MIN;
wdev->wdt_dev.parent = dev;
if (watchdog_init_timeout(&wdev->wdt_dev, timeout, dev) < 0) {
wdev->wdt_dev.timeout = WDT_DEFAULT_TIMEOUT;
}
watchdog_set_nowayout(&wdev->wdt_dev, nowayout);
watchdog_stop_on_reboot(&wdev->wdt_dev);
watchdog_set_drvdata(&wdev->wdt_dev, wdev);
uniphier_watchdog_stop(&wdev->wdt_dev);
ret = regmap_write(wdev->regmap, WDTRSTSEL, WDTRSTSEL_RSTSEL_BOTH);
if (ret)
return ret;
ret = devm_watchdog_register_device(dev, &wdev->wdt_dev);
if (ret)
return ret;
dev_info(dev, "watchdog driver (timeout=%d sec, nowayout=%d)\n",
wdev->wdt_dev.timeout, nowayout);
return 0;
}
static int __init softdog_init(void)
{
int ret;
watchdog_init_timeout(&softdog_dev, soft_margin, NULL);
watchdog_set_nowayout(&softdog_dev, nowayout);
watchdog_stop_on_reboot(&softdog_dev);
ret = watchdog_register_device(&softdog_dev);
if (ret)
return ret;
pr_info("initialized. soft_noboot=%d soft_margin=%d sec soft_panic=%d (nowayout=%d)\n",
soft_noboot, softdog_dev.timeout, soft_panic, nowayout);
return 0;
}
static int rtd119x_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rtd119x_watchdog_device *data;
int ret;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(data->base))
return PTR_ERR(data->base);
data->clk = devm_clk_get(dev, NULL);
if (IS_ERR(data->clk))
return PTR_ERR(data->clk);
ret = clk_prepare_enable(data->clk);
if (ret)
return ret;
ret = devm_add_action_or_reset(dev, rtd119x_clk_disable_unprepare,
data->clk);
if (ret)
return ret;
data->wdt_dev.info = &rtd119x_wdt_info;
data->wdt_dev.ops = &rtd119x_wdt_ops;
data->wdt_dev.timeout = 120;
data->wdt_dev.max_timeout = 0xffffffff / clk_get_rate(data->clk);
data->wdt_dev.min_timeout = 1;
data->wdt_dev.parent = dev;
watchdog_stop_on_reboot(&data->wdt_dev);
watchdog_set_drvdata(&data->wdt_dev, data);
platform_set_drvdata(pdev, data);
writel_relaxed(RTD119X_TCWTR_WDCLR, data->base + RTD119X_TCWTR);
rtd119x_wdt_set_timeout(&data->wdt_dev, data->wdt_dev.timeout);
rtd119x_wdt_stop(&data->wdt_dev);
return devm_watchdog_register_device(dev, &data->wdt_dev);
}
/**
* cdns_wdt_probe - Probe call for the device.
*
* @pdev: handle to the platform device structure.
* Return: 0 on success, negative error otherwise.
*
* It does all the memory allocation and registration for the device.
*/
static int cdns_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int ret, irq;
unsigned long clock_f;
struct cdns_wdt *wdt;
struct watchdog_device *cdns_wdt_device;
wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
cdns_wdt_device = &wdt->cdns_wdt_device;
cdns_wdt_device->info = &cdns_wdt_info;
cdns_wdt_device->ops = &cdns_wdt_ops;
cdns_wdt_device->timeout = CDNS_WDT_DEFAULT_TIMEOUT;
cdns_wdt_device->min_timeout = CDNS_WDT_MIN_TIMEOUT;
cdns_wdt_device->max_timeout = CDNS_WDT_MAX_TIMEOUT;
wdt->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(wdt->regs))
return PTR_ERR(wdt->regs);
/* Register the interrupt */
wdt->rst = of_property_read_bool(dev->of_node, "reset-on-timeout");
irq = platform_get_irq(pdev, 0);
if (!wdt->rst && irq >= 0) {
ret = devm_request_irq(dev, irq, cdns_wdt_irq_handler, 0,
pdev->name, pdev);
if (ret) {
dev_err(dev,
"cannot register interrupt handler err=%d\n",
ret);
return ret;
}
}
/* Initialize the members of cdns_wdt structure */
cdns_wdt_device->parent = dev;
watchdog_init_timeout(cdns_wdt_device, wdt_timeout, dev);
watchdog_set_nowayout(cdns_wdt_device, nowayout);
watchdog_stop_on_reboot(cdns_wdt_device);
watchdog_set_drvdata(cdns_wdt_device, wdt);
wdt->clk = devm_clk_get(dev, NULL);
if (IS_ERR(wdt->clk)) {
dev_err(dev, "input clock not found\n");
return PTR_ERR(wdt->clk);
}
ret = clk_prepare_enable(wdt->clk);
if (ret) {
dev_err(dev, "unable to enable clock\n");
return ret;
}
ret = devm_add_action_or_reset(dev, cdns_clk_disable_unprepare,
wdt->clk);
if (ret)
return ret;
clock_f = clk_get_rate(wdt->clk);
if (clock_f <= CDNS_WDT_CLK_75MHZ) {
wdt->prescaler = CDNS_WDT_PRESCALE_512;
wdt->ctrl_clksel = CDNS_WDT_PRESCALE_SELECT_512;
} else {
wdt->prescaler = CDNS_WDT_PRESCALE_4096;
wdt->ctrl_clksel = CDNS_WDT_PRESCALE_SELECT_4096;
}
spin_lock_init(&wdt->io_lock);
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");
return ret;
}
platform_set_drvdata(pdev, wdt);
dev_info(dev, "Xilinx Watchdog Timer at %p with timeout %ds%s\n",
wdt->regs, cdns_wdt_device->timeout,
nowayout ? ", nowayout" : "");
return 0;
}
static int gpio_wdt_probe(struct platform_device *pdev)
{
struct gpio_wdt_priv *priv;
enum of_gpio_flags flags;
unsigned int hw_margin;
unsigned long f = 0;
const char *algo;
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->gpio = of_get_gpio_flags(pdev->dev.of_node, 0, &flags);
if (!gpio_is_valid(priv->gpio))
return priv->gpio;
priv->active_low = flags & OF_GPIO_ACTIVE_LOW;
ret = of_property_read_string(pdev->dev.of_node, "hw_algo", &algo);
if (ret)
return ret;
if (!strcmp(algo, "toggle")) {
priv->hw_algo = HW_ALGO_TOGGLE;
f = GPIOF_IN;
} else if (!strcmp(algo, "level")) {
priv->hw_algo = HW_ALGO_LEVEL;
f = priv->active_low ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
} else {
return -EINVAL;
}
ret = devm_gpio_request_one(&pdev->dev, priv->gpio, f,
dev_name(&pdev->dev));
if (ret)
return ret;
ret = of_property_read_u32(pdev->dev.of_node,
"hw_margin_ms", &hw_margin);
if (ret)
return ret;
/* Disallow values lower than 2 and higher than 65535 ms */
if (hw_margin < 2 || hw_margin > 65535)
return -EINVAL;
/* Use safe value (1/2 of real timeout) */
priv->hw_margin = msecs_to_jiffies(hw_margin / 2);
priv->always_running = of_property_read_bool(pdev->dev.of_node,
"always-running");
watchdog_set_drvdata(&priv->wdd, priv);
priv->wdd.info = &gpio_wdt_ident;
priv->wdd.ops = &gpio_wdt_ops;
priv->wdd.min_timeout = SOFT_TIMEOUT_MIN;
priv->wdd.max_timeout = SOFT_TIMEOUT_MAX;
priv->wdd.parent = &pdev->dev;
if (watchdog_init_timeout(&priv->wdd, 0, &pdev->dev) < 0)
priv->wdd.timeout = SOFT_TIMEOUT_DEF;
setup_timer(&priv->timer, gpio_wdt_hwping, (unsigned long)&priv->wdd);
watchdog_stop_on_reboot(&priv->wdd);
ret = watchdog_register_device(&priv->wdd);
if (ret)
return ret;
if (priv->always_running)
gpio_wdt_start_impl(priv);
return 0;
}
