On 27/09/2022 13:02, Srinivas Neeli wrote:
> +
> +static void xwwdt_clk_disable_unprepare(void *data)
> +{
> + clk_disable_unprepare(data);
If watchdog is stopped and then device unbound, don't you have double
disable? IOW, where is matching clk_enable?
> +}
> +
> +static const struct watchdog_info xilinx_wwdt_ident = {
> + .options = WDIOF_KEEPALIVEPING |
> + WDIOF_SETTIMEOUT,
> + .firmware_version = 1,
> + .identity = "xlnx_window watchdog",
> +};
> +
> +static const struct watchdog_ops xilinx_wwdt_ops = {
> + .owner = THIS_MODULE,
> + .start = xilinx_wwdt_start,
> + .stop = xilinx_wwdt_stop,
> + .set_timeout = xilinx_wwdt_set_timeout,
> + .ping = xilinx_wwdt_keepalive,
> +};
> +
> +static int xwwdt_probe(struct platform_device *pdev)
> +{
> + struct watchdog_device *xilinx_wwdt_wdd;
> + struct device *dev = &pdev->dev;
> + struct xwwdt_device *xdev;
> + int ret;
> +
> + xdev = devm_kzalloc(dev, sizeof(*xdev), GFP_KERNEL);
> + if (!xdev)
> + return -ENOMEM;
> +
> + xilinx_wwdt_wdd = &xdev->xilinx_wwdt_wdd;
> + xilinx_wwdt_wdd->info = &xilinx_wwdt_ident;
> + xilinx_wwdt_wdd->ops = &xilinx_wwdt_ops;
> + xilinx_wwdt_wdd->parent = dev;
> +
> + xdev->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(xdev->base))
> + return PTR_ERR(xdev->base);
> +
> + xdev->clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(xdev->clk))
> + return PTR_ERR(xdev->clk);
> +
> + xdev->freq = clk_get_rate(xdev->clk);
> + if (!xdev->freq)
> + return -EINVAL;
> +
> + ret = clk_prepare_enable(xdev->clk);
> + if (ret) {
> + dev_err(dev, "unable to enable clock\n");
> + return ret;
> + }
> +
> + ret = devm_add_action_or_reset(dev, xwwdt_clk_disable_unprepare,
> + xdev->clk);
> + if (ret)
> + return ret;
> +
> + xilinx_wwdt_wdd->timeout = XWWDT_DEFAULT_TIMEOUT;
> + xilinx_wwdt_wdd->min_timeout = XWWDT_MIN_TIMEOUT;
> + xilinx_wwdt_wdd->max_timeout = XWWDT_MAX_TIMEOUT;
> +
> + ret = watchdog_init_timeout(xilinx_wwdt_wdd,
> + xwwdt_timeout, &pdev->dev);
> + if (ret)
> + dev_info(&pdev->dev, "Configured default timeout value\n");
> +
> + spin_lock_init(&xdev->spinlock);
> + watchdog_set_drvdata(xilinx_wwdt_wdd, xdev);
> +
> + ret = devm_watchdog_register_device(dev, xilinx_wwdt_wdd);
> + if (ret)
> + return ret;
> +
> + dev_info(dev, "Xilinx window watchdog Timer with timeout %ds\n",
> + xilinx_wwdt_wdd->timeout);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id xwwdt_of_match[] = {
> + { .compatible = "xlnx,versal-wwdt-1.0", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, xwwdt_of_match);
> +
> +static struct platform_driver xwwdt_driver = {
> + .probe = xwwdt_probe,
> + .driver = {
> + .name = "Xilinx window watchdog",
Do you see spaces in other names of drivers?
Best regards,
Krzysztof
