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