watchdog: loongson1_wdt: Add DT support

This patch adds the of_match_table to enable DT support
of Loongson-1 watchdog driver.
And modify the parameter of devm_clk_get_enabled() accordingly.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lkml.kernel.org/r/20230511121159.463645-3-keguang.zhang@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c
index 3c651c5..4ac7810 100644 (file)
--- a/drivers/watchdog/loongson1_wdt.c
+++ b/drivers/watchdog/loongson1_wdt.c
@@ -5,6 +5,7 @@
 
 #include <linux/clk.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/watchdog.h>
 
@@ -112,7 +113,7 @@ static int ls1x_wdt_probe(struct platform_device *pdev)
        if (IS_ERR(drvdata->base))
                return PTR_ERR(drvdata->base);
 
-       drvdata->clk = devm_clk_get_enabled(dev, pdev->name);
+       drvdata->clk = devm_clk_get_enabled(dev, NULL);
        if (IS_ERR(drvdata->clk))
                return PTR_ERR(drvdata->clk);
 
@@ -144,10 +145,20 @@ static int ls1x_wdt_probe(struct platform_device *pdev)
        return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id ls1x_wdt_dt_ids[] = {
+       { .compatible = "loongson,ls1b-wdt", },
+       { .compatible = "loongson,ls1c-wdt", },
+       { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ls1x_wdt_dt_ids);
+#endif
+
 static struct platform_driver ls1x_wdt_driver = {
        .probe = ls1x_wdt_probe,
        .driver = {
                .name = "ls1x-wdt",
+               .of_match_table = of_match_ptr(ls1x_wdt_dt_ids),
        },
 };