nokia-modem.txt

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    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 };

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sys/contrib/device-tree/Bindings/hsi/nokia-modem.txt