diff options
Diffstat (limited to 'drivers/watchdog/cadence_wdt.c')
| -rw-r--r-- | drivers/watchdog/cadence_wdt.c | 90 |
1 files changed, 27 insertions, 63 deletions
diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c index c3924356d173..a22f2d431a35 100644 --- a/drivers/watchdog/cadence_wdt.c +++ b/drivers/watchdog/cadence_wdt.c @@ -274,6 +274,11 @@ static const struct watchdog_ops cdns_wdt_ops = { .set_timeout = cdns_wdt_settimeout, }; +static void cdns_clk_disable_unprepare(void *data) +{ + clk_disable_unprepare(data); +} + /************************Platform Operations*****************************/ /** * cdns_wdt_probe - Probe call for the device. @@ -285,13 +290,13 @@ static const struct watchdog_ops cdns_wdt_ops = { */ static int cdns_wdt_probe(struct platform_device *pdev) { - struct resource *res; + 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(&pdev->dev, sizeof(*wdt), GFP_KERNEL); + wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); if (!wdt) return -ENOMEM; @@ -302,19 +307,18 @@ static int cdns_wdt_probe(struct platform_device *pdev) cdns_wdt_device->min_timeout = CDNS_WDT_MIN_TIMEOUT; cdns_wdt_device->max_timeout = CDNS_WDT_MAX_TIMEOUT; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - wdt->regs = devm_ioremap_resource(&pdev->dev, res); + 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(pdev->dev.of_node, "reset-on-timeout"); + 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(&pdev->dev, irq, cdns_wdt_irq_handler, 0, + ret = devm_request_irq(dev, irq, cdns_wdt_irq_handler, 0, pdev->name, pdev); if (ret) { - dev_err(&pdev->dev, + dev_err(dev, "cannot register interrupt handler err=%d\n", ret); return ret; @@ -322,30 +326,28 @@ static int cdns_wdt_probe(struct platform_device *pdev) } /* Initialize the members of cdns_wdt structure */ - cdns_wdt_device->parent = &pdev->dev; - - ret = watchdog_init_timeout(cdns_wdt_device, wdt_timeout, &pdev->dev); - if (ret) { - dev_err(&pdev->dev, "unable to set timeout value\n"); - return ret; - } + 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(&pdev->dev, NULL); + wdt->clk = devm_clk_get(dev, NULL); if (IS_ERR(wdt->clk)) { - dev_err(&pdev->dev, "input clock not found\n"); - ret = PTR_ERR(wdt->clk); - return ret; + dev_err(dev, "input clock not found\n"); + return PTR_ERR(wdt->clk); } ret = clk_prepare_enable(wdt->clk); if (ret) { - dev_err(&pdev->dev, "unable to enable clock\n"); + 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) { @@ -358,56 +360,20 @@ static int cdns_wdt_probe(struct platform_device *pdev) spin_lock_init(&wdt->io_lock); - ret = watchdog_register_device(cdns_wdt_device); + 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(&pdev->dev, "Failed to register wdt device\n"); - goto err_clk_disable; + dev_err(dev, "Failed to register wdt device\n"); + return ret; } platform_set_drvdata(pdev, wdt); - dev_info(&pdev->dev, "Xilinx Watchdog Timer at %p with timeout %ds%s\n", + dev_info(dev, "Xilinx Watchdog Timer at %p with timeout %ds%s\n", wdt->regs, cdns_wdt_device->timeout, nowayout ? ", nowayout" : ""); return 0; - -err_clk_disable: - clk_disable_unprepare(wdt->clk); - - return ret; -} - -/** - * cdns_wdt_remove - Probe call for the device. - * - * @pdev: handle to the platform device structure. - * Return: 0 on success, otherwise negative error. - * - * Unregister the device after releasing the resources. - */ -static int cdns_wdt_remove(struct platform_device *pdev) -{ - struct cdns_wdt *wdt = platform_get_drvdata(pdev); - - cdns_wdt_stop(&wdt->cdns_wdt_device); - watchdog_unregister_device(&wdt->cdns_wdt_device); - clk_disable_unprepare(wdt->clk); - - return 0; -} - -/** - * cdns_wdt_shutdown - Stop the device. - * - * @pdev: handle to the platform structure. - * - */ -static void cdns_wdt_shutdown(struct platform_device *pdev) -{ - struct cdns_wdt *wdt = platform_get_drvdata(pdev); - - cdns_wdt_stop(&wdt->cdns_wdt_device); - clk_disable_unprepare(wdt->clk); } /** @@ -462,8 +428,6 @@ MODULE_DEVICE_TABLE(of, cdns_wdt_of_match); /* Driver Structure */ static struct platform_driver cdns_wdt_driver = { .probe = cdns_wdt_probe, - .remove = cdns_wdt_remove, - .shutdown = cdns_wdt_shutdown, .driver = { .name = "cdns-wdt", .of_match_table = cdns_wdt_of_match, |