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如何为 simple-pm-bus 探针配置设备节点？

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如何为 simple-pm-bus 探针配置设备节点？

在 soc 节点内，我有一个带有 simple-mdf 设备的看门狗节点。

soc {
        #address-cells = <2>;
        #size-cells = <2>;
        compatible = "simple-bus";
        ranges;
        toprgu: watchdog@10007000 {
            compatible = "mediatek,mt6589-wdt", "syscon", "simple-mfd";
            reg = <0 0x10017000 0 0x1000>;
            ...
            reboot-mode {
                compatible = "syscon-reboot-mode";
            };
        };
};

我的问题是，当探测时我得到以下结果

[    0.105509] bus: 'platform': add driver simple-pm-bus
[    0.105555] bus: 'platform': __driver_probe_device: matched device soc with driver simple-pm-bus
[    0.105574] bus: 'platform': really_probe: probing driver simple-pm-bus with device soc
[    0.105630] driver: 'simple-pm-bus': driver_bound: bound to device 'soc'
[    0.105811] bus: 'platform': really_probe: bound device soc to driver simple-pm-bus
[    0.105832] bus: 'platform': __driver_probe_device: matched device 10007000.watchdog with driver simple-pm-bus
[    0.105846] bus: 'platform': really_probe: probing driver simple-pm-bus with device 10007000.watchdog
[    0.105891] simple-pm-bus: probe of 10007000.watchdog rejects match -19

simple-pm-bus 驱动程序似乎拒绝compatible = "foo", "syscon", "simple-mfd"我的树中的设备。这mt6589-wdt(foo) 探测正常，甚至报告

mtk-wdt 10007000.watchdog: Watchdog enabled (timeout=10 sec, nowayout=0)

让我困惑的是为什么 simple-pm-bus 拒绝该设备？我缺少什么特殊属性吗？

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