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The Nokia N900's modem is connected via Synchronous Serial Interface (SSI), which is a legacy version of MIPI's High-speed Synchronous Serial Interface (HSI). The handles the GPIOs for enabling and resetting the modem and instanciates ssi-protocol for data exchange. It does not yet support exchanging voice data with the modem. Signed-off-by: Sebastian Reichel <sre@kernel.org> Reviewed-by: Pavel Machek <pavel@ucw.cz> Tested-By: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
58 lines
1.5 KiB
Plaintext
58 lines
1.5 KiB
Plaintext
Nokia modem client bindings
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The Nokia modem HSI client follows the common HSI client binding
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and inherits all required properties. The following additional
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properties are needed by the Nokia modem HSI client:
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Required properties:
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- compatible: Should be one of
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"nokia,n900-modem"
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- hsi-channel-names: Should contain the following strings
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"mcsaab-control"
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"speech-control"
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"speech-data"
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"mcsaab-data"
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- gpios: Should provide a GPIO handler for each GPIO listed in
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gpio-names
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- gpio-names: Should contain the following strings
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"cmt_apeslpx"
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"cmt_rst_rq"
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"cmt_en"
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"cmt_rst"
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"cmt_bsi"
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- interrupts: Should be IRQ handle for modem's reset indication
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Example:
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&ssi_port {
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modem: hsi-client {
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compatible = "nokia,n900-modem";
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pinctrl-names = "default";
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pinctrl-0 = <&modem_pins>;
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hsi-channel-ids = <0>, <1>, <2>, <3>;
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hsi-channel-names = "mcsaab-control",
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"speech-control",
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"speech-data",
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"mcsaab-data";
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hsi-speed-kbps = <55000>;
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hsi-mode = "frame";
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hsi-flow = "synchronized";
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hsi-arb-mode = "round-robin";
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interrupts-extended = <&gpio3 8 IRQ_TYPE_EDGE_FALLING>; /* 72 */
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gpios = <&gpio3 6 GPIO_ACTIVE_HIGH>, /* 70 */
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<&gpio3 9 GPIO_ACTIVE_HIGH>, /* 73 */
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<&gpio3 10 GPIO_ACTIVE_HIGH>, /* 74 */
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<&gpio3 11 GPIO_ACTIVE_HIGH>, /* 75 */
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<&gpio5 29 GPIO_ACTIVE_HIGH>; /* 157 */
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gpio-names = "cmt_apeslpx",
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"cmt_rst_rq",
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"cmt_en",
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"cmt_rst",
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"cmt_bsi";
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};
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};
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