From: Kenneth Westfield <[email protected]> Add documentation to the sound directory of the device-tree bindings for the IPQ806x LPASS CPU DAI device.
Signed-off-by: Kenneth Westfield <[email protected]> Acked-by: Banajit Goswami <[email protected]> --- .../devicetree/bindings/sound/qcom,lpass-cpu.txt | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/qcom,lpass-cpu.txt diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.txt b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.txt new file mode 100644 index 0000000000000000000000000000000000000000..7406ae52aec196f136883eb01afbc6c425bdc465 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.txt @@ -0,0 +1,66 @@ +* Qualcomm Technologies LPASS CPU DAI + +This node models the Qualcomm Technologies LPASS DAI ports. + +Required properties: + +- compatible : "qcom,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" +- 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" + * "lpass-lpm" + +Optional properties: + +- qcom,system-clock-shift : Add this bool property if the default + frequency of the system clock needs to + be reduced. +- qcom,system-clock-shift-compare : A numerical value used to right-shift + the default system clock frequency for + comparison with the target bit clock + frequency. +- qcom,system-clock-shift-amount : A numerical value used to right-shift + the default system clock frequency. +- qcom,alternate-sysclk : Add this bool property if the default + frequency of the system clock cannot + divide down to the target bit clock + frequency. +- qcom,alternate-sysclk-bitwidth : A numerical value representing the + sample bitwidth which requires use of + the alternate system clock frequency. +- qcom,alternate-sysclk-frequency : A numerical value representing the new + system clock frequency to use. + +Example: + +lpass-cpu@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>, <0x28400000 0x4000>; + reg-names = "lpass-lpaif", "lpass-lpm"; + qcom,system-clock-shift; + qcom,system-clock-shift-compare = <4>; + qcom,system-clock-shift-amount = <3>; + qcom,alternate-sysclk; + qcom,alternate-systclk-bitwidth = <24>; + qcom,alternate-systclk-frequency = <4608000>; +}; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
