watchdog: Add a new struct for Amlogic-GXBB driver

Add a new structure wdt_params to describe the watchdog difference
of different chips.

Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com>
Reviewed-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230802033222.4024946-3-huqiang.qin@amlogic.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/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c
index 35d80cb39856c137095671339ab65255b749ad77..18180d91543e514edb90cc30b61184e644e89da9 100644 (file)
--- a/drivers/watchdog/meson_gxbb_wdt.c
+++ b/drivers/watchdog/meson_gxbb_wdt.c
@@ -22,7 +22,6 @@
 
 #define GXBB_WDT_CTRL_CLKDIV_EN                        BIT(25)
 #define GXBB_WDT_CTRL_CLK_EN                   BIT(24)
-#define GXBB_WDT_CTRL_EE_RESET                 BIT(21)
 #define GXBB_WDT_CTRL_EN                       BIT(18)
 #define GXBB_WDT_CTRL_DIV_MASK                 (BIT(18) - 1)
 
@@ -45,6 +44,10 @@ struct meson_gxbb_wdt {
        struct clk *clk;
 };
 
+struct wdt_params {
+       u32 rst;
+};
+
 static int meson_gxbb_wdt_start(struct watchdog_device *wdt_dev)
 {
        struct meson_gxbb_wdt *data = watchdog_get_drvdata(wdt_dev);
@@ -140,8 +143,12 @@ static const struct dev_pm_ops meson_gxbb_wdt_pm_ops = {
        SET_SYSTEM_SLEEP_PM_OPS(meson_gxbb_wdt_suspend, meson_gxbb_wdt_resume)
 };
 
+static const struct wdt_params gxbb_params = {
+       .rst = BIT(21),
+};
+
 static const struct of_device_id meson_gxbb_wdt_dt_ids[] = {
-        { .compatible = "amlogic,meson-gxbb-wdt", },
+        { .compatible = "amlogic,meson-gxbb-wdt", .data = &gxbb_params, },
         { /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, meson_gxbb_wdt_dt_ids);
@@ -150,6 +157,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
        struct meson_gxbb_wdt *data;
+       struct wdt_params *params;
        u32 ctrl_reg;
 
        data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
@@ -164,6 +172,8 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
        if (IS_ERR(data->clk))
                return PTR_ERR(data->clk);
 
+       params = (struct wdt_params *)of_device_get_match_data(dev);
+
        platform_set_drvdata(pdev, data);
 
        data->wdt_dev.parent = dev;
@@ -191,7 +201,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
        /* Setup with 1ms timebase */
        ctrl_reg |= ((clk_get_rate(data->clk) / 1000) &
                        GXBB_WDT_CTRL_DIV_MASK) |
-                       GXBB_WDT_CTRL_EE_RESET |
+                       params->rst |
                        GXBB_WDT_CTRL_CLK_EN |
                        GXBB_WDT_CTRL_CLKDIV_EN;