Documentation/devicetree/bindings/hsi/client-devices.txt

   1 Each HSI port is supposed to have one child node, which
   2 symbols the remote device connected to the HSI port. The
   3 following properties are standardized for HSI clients:
   4
   5 Required HSI configuration properties:
   6
   7 - hsi-channel-ids:      A list of channel ids
   8
   9 - hsi-rx-mode:          Receiver Bit transmission mode ("stream" or "frame")
  10 - hsi-tx-mode:          Transmitter Bit transmission mode ("stream" or "frame")
  11 - hsi-mode:             May be used instead hsi-rx-mode and hsi-tx-mode if
  12                         the transmission mode is the same for receiver and
  13                         transmitter
  14 - hsi-speed-kbps:       Max bit transmission speed in kbit/s
  15 - hsi-flow:             RX flow type ("synchronized" or "pipeline")
  16 - hsi-arb-mode:         Arbitration mode for TX frame ("round-robin", "priority")
  17
  18 Optional HSI configuration properties:
  19
  20 - hsi-channel-names:    A list with one name per channel specified in the
  21                         hsi-channel-ids property
  22
  23
  24 Device Tree node example for an HSI client:
  25
  26 hsi-controller {
  27         hsi-port {
  28                 modem: hsi-client {
  29                         compatible = "nokia,n900-modem";
  30
  31                         hsi-channel-ids = <0>, <1>, <2>, <3>;
  32                         hsi-channel-names = "mcsaab-control",
  33                                             "speech-control",
  34                                             "speech-data",
  35                                             "mcsaab-data";
  36                         hsi-speed-kbps = <55000>;
  37                         hsi-mode = "frame";
  38                         hsi-flow = "synchronized";
  39                         hsi-arb-mode = "round-robin";
  40
  41                         /* more client specific properties */
  42                 };
  43         };
  44 };