mirror of https://github.com/F-Stack/f-stack.git
80 lines
2.5 KiB
Plaintext
80 lines
2.5 KiB
Plaintext
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* Qualcomm Technologies LPASS CPU DAI
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This node models the Qualcomm Technologies Low-Power Audio SubSystem (LPASS).
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Required properties:
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- compatible : "qcom,lpass-cpu" or "qcom,apq8016-lpass-cpu"
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- clocks : Must contain an entry for each entry in clock-names.
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- clock-names : A list which must include the following entries:
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* "ahbix-clk"
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* "mi2s-osr-clk"
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* "mi2s-bit-clk"
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: required clocks for "qcom,lpass-cpu-apq8016"
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* "ahbix-clk"
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* "mi2s-bit-clk0"
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* "mi2s-bit-clk1"
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* "mi2s-bit-clk2"
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* "mi2s-bit-clk3"
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* "pcnoc-mport-clk"
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* "pcnoc-sway-clk"
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- interrupts : Must contain an entry for each entry in
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interrupt-names.
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- interrupt-names : A list which must include the following entries:
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* "lpass-irq-lpaif"
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- pinctrl-N : One property must exist for each entry in
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pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
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for details of the property values.
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- pinctrl-names : Must contain a "default" entry.
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- reg : Must contain an address for each entry in reg-names.
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- reg-names : A list which must include the following entries:
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* "lpass-lpaif"
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- #address-cells : Must be 1
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- #size-cells : Must be 0
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Optional properties:
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- qcom,adsp : Phandle for the audio DSP node
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By default, the driver uses up to 4 MI2S SD lines, for a total of 8 channels.
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The SD lines to use can be configured by adding subnodes for each of the DAIs.
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Required properties for each DAI (represented by a subnode):
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- reg : Must be one of the DAI IDs
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(usually part of dt-bindings header)
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- qcom,playback-sd-lines: List of serial data lines to use for playback
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Each SD line should be represented by a number from 0-3.
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- qcom,capture-sd-lines : List of serial data lines to use for capture
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Each SD line should be represented by a number from 0-3.
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Note that adding a subnode changes the default to "no lines configured",
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so both playback and capture lines should be configured when a subnode is added.
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Example:
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lpass@28100000 {
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compatible = "qcom,lpass-cpu";
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clocks = <&lcc AHBIX_CLK>, <&lcc MI2S_OSR_CLK>, <&lcc MI2S_BIT_CLK>;
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clock-names = "ahbix-clk", "mi2s-osr-clk", "mi2s-bit-clk";
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interrupts = <0 85 1>;
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interrupt-names = "lpass-irq-lpaif";
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pinctrl-names = "default", "idle";
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pinctrl-0 = <&mi2s_default>;
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pinctrl-1 = <&mi2s_idle>;
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reg = <0x28100000 0x10000>;
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reg-names = "lpass-lpaif";
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qcom,adsp = <&adsp>;
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#address-cells = <1>;
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#size-cells = <0>;
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/* Optional to set different MI2S SD lines */
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dai@3 {
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reg = <MI2S_QUATERNARY>;
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qcom,playback-sd-lines = <0 1>;
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};
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};
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