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>
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@ -22,7 +22,6 @@
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#define GXBB_WDT_CTRL_CLKDIV_EN BIT(25)
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#define GXBB_WDT_CTRL_CLK_EN BIT(24)
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#define GXBB_WDT_CTRL_EE_RESET BIT(21)
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#define GXBB_WDT_CTRL_EN BIT(18)
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#define GXBB_WDT_CTRL_DIV_MASK (BIT(18) - 1)
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@ -45,6 +44,10 @@ struct meson_gxbb_wdt {
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struct clk *clk;
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};
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struct wdt_params {
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u32 rst;
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};
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static int meson_gxbb_wdt_start(struct watchdog_device *wdt_dev)
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{
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struct meson_gxbb_wdt *data = watchdog_get_drvdata(wdt_dev);
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@ -140,8 +143,12 @@ static const struct dev_pm_ops meson_gxbb_wdt_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(meson_gxbb_wdt_suspend, meson_gxbb_wdt_resume)
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};
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static const struct wdt_params gxbb_params = {
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.rst = BIT(21),
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};
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static const struct of_device_id meson_gxbb_wdt_dt_ids[] = {
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{ .compatible = "amlogic,meson-gxbb-wdt", },
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{ .compatible = "amlogic,meson-gxbb-wdt", .data = &gxbb_params, },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, meson_gxbb_wdt_dt_ids);
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@ -150,6 +157,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct meson_gxbb_wdt *data;
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struct wdt_params *params;
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u32 ctrl_reg;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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@ -164,6 +172,8 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
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if (IS_ERR(data->clk))
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return PTR_ERR(data->clk);
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params = (struct wdt_params *)of_device_get_match_data(dev);
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platform_set_drvdata(pdev, data);
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data->wdt_dev.parent = dev;
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@ -191,7 +201,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
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/* Setup with 1ms timebase */
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ctrl_reg |= ((clk_get_rate(data->clk) / 1000) &
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GXBB_WDT_CTRL_DIV_MASK) |
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GXBB_WDT_CTRL_EE_RESET |
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params->rst |
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GXBB_WDT_CTRL_CLK_EN |
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GXBB_WDT_CTRL_CLKDIV_EN;
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