[mmc]设备树节点含义

 

&mmc3 {
    status = "okay";
    dmas = <&edma 30 &edma 31>;
    dma-names = "tx", "rx";
    vmmc-supply = <&wlan_en_reg>;
    bus-width = <4>;
    max-speed = <8000000>;
    pinctrl-names = "default", "sleep";
    pinctrl-0 = <&mmc3_pins_default>;
    pinctrl-1 = <&mmc3_pins_sleep>;
    cap-power-off-card;
    keep-power-in-suspend;
    ti,non-removable;
}

节点含义

• cap-power-off-card: Can power off after boot.
• keep-power-in-suspend: preserve card power during suspend
• ti,no-removable: No card-detection configuration is performed.