Documentation/devicetree/bindings/hsi/nokia-modem.txt

   1 Nokia modem client bindings
   2
   3 The Nokia modem HSI client follows the common HSI client binding
   4 and inherits all required properties. The following additional
   5 properties are needed by the Nokia modem HSI client:
   6
   7 Required properties:
   8 - compatible:           Should be one of
   9       "nokia,n900-modem"
  10       "nokia,n950-modem"
  11       "nokia,n9-modem"
  12 - hsi-channel-names:    Should contain the following strings
  13       "mcsaab-control"
  14       "speech-control"
  15       "speech-data"
  16       "mcsaab-data"
  17 - gpios:                Should provide a GPIO handler for each GPIO listed in
  18                         gpio-names
  19 - gpio-names:           Should contain the following strings
  20       "cmt_apeslpx" (for n900, n950, n9)
  21       "cmt_rst_rq"  (for n900, n950, n9)
  22       "cmt_en"      (for n900, n950, n9)
  23       "cmt_rst"     (for n900)
  24       "cmt_bsi"     (for n900)
  25 - interrupts:           Should be IRQ handle for modem's reset indication
  26
  27 Example:
  28
  29 &ssi_port {
  30         modem: hsi-client {
  31                 compatible = "nokia,n900-modem";
  32
  33                 pinctrl-names = "default";
  34                 pinctrl-0 = <&modem_pins>;
  35
  36                 hsi-channel-ids = <0>, <1>, <2>, <3>;
  37                 hsi-channel-names = "mcsaab-control",
  38                                     "speech-control",
  39                                     "speech-data",
  40                                     "mcsaab-data";
  41                 hsi-speed-kbps = <55000>;
  42                 hsi-mode = "frame";
  43                 hsi-flow = "synchronized";
  44                 hsi-arb-mode = "round-robin";
  45
  46                 interrupts-extended = <&gpio3 8 IRQ_TYPE_EDGE_FALLING>; /* 72 */
  47
  48                 gpios = <&gpio3  6 GPIO_ACTIVE_HIGH>, /* 70 */
  49                         <&gpio3  9 GPIO_ACTIVE_HIGH>, /* 73 */
  50                         <&gpio3 10 GPIO_ACTIVE_HIGH>, /* 74 */
  51                         <&gpio3 11 GPIO_ACTIVE_HIGH>, /* 75 */
  52                         <&gpio5 29 GPIO_ACTIVE_HIGH>; /* 157 */
  53                 gpio-names = "cmt_apeslpx",
  54                              "cmt_rst_rq",
  55                              "cmt_en",
  56                              "cmt_rst",
  57                              "cmt_bsi";
  58         };
  59 };