Kernel-4.18.0-80.el8_client-devices

Each HSI port is supposed to have one child node, which
symbols the remote device connected to the HSI port. The
following properties are standardized for HSI clients:

Required HSI configuration properties:

• hsi-channel-ids: A list of channel ids

• hsi-rx-mode: Receiver Bit transmission mode (“stream” or “frame”)

• hsi-tx-mode: Transmitter Bit transmission mode (“stream” or “frame”)

• hsi-mode: May be used instead hsi-rx-mode and hsi-tx-mode if

        the transmission mode is the same for receiver and
        transmitter
  

• hsi-speed-kbps: Max bit transmission speed in kbit/s

• hsi-flow: RX flow type (“synchronized” or “pipeline”)

• hsi-arb-mode: Arbitration mode for TX frame (“round-robin”, “priority”)

Optional HSI configuration properties:

• hsi-channel-names: A list with one name per channel specified in the

        hsi-channel-ids property
  

Device Tree node example for an HSI client:

hsi-controller {
hsi-port {
modem: hsi-client {
compatible = “nokia,n900-modem”;

        hsi-channel-ids = <0>, <1>, <2>, <3>;
        hsi-channel-names = "mcsaab-control",
                    "speech-control",
                    "speech-data",
                    "mcsaab-data";
        hsi-speed-kbps = <55000>;
        hsi-mode = "frame";
        hsi-flow = "synchronized";
        hsi-arb-mode = "round-robin";

        /* more client specific properties */
    };
};

};