| Message ID | 1416423169-21865-3-git-send-email-kwestfie@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Nov 19, 2014 at 10:52:42AM -0800, Kenneth Westfield wrote: > +* Qualcomm Technologies IPQ806x SoundCard > + > +This node models the Qualcomm Technologies IPQ806x LPASS Audio SoundCard, > +with a connection between the CPU MI2S DAI and the external DAC. > +Required properties: > +- compatible : "qcom,ipq806x-snd-card" > +- qcom,model : The user-visible name of this sound card > +- pinctrl-0 : The default state of the MI2S pins > +- pinctrl-names : The name of the default state Why is a sound card doing pin control? I would expect that the component devices would do their own pin control. Also if you have named pin control states the set of valid names should be specified. > +- dac-gpios : GPIO specifier to the GPIO -> DAC SDMODE pin Simiarly why is a sound card controlling the DAC GPIOs, is this not part of the CODEC? > +- clocks : A list of clock specifiers in the following order: > + * AHBIX bus clock > +- clock-names : A list of names in the following order: > + * ahbix_clk Again I'd really expect any devices on the AHB to be controlling the AHB related clocks rather than a sound card doing it. > +asoc-platform : This is phandle list containing the references to platform device > + nodes that are used as part of the sound card dai-links. > +asoc-platform-names : This property contains list of platform names. The order of > + the platform names should match to that of the phandle order > + given in "asoc-platform". The device tree bindings should be OS neutral but ASoC is a Linux thing. This needs to be written in terms of the hardware it's describing. > +Required properties: > +- compatible : "qcom,lpass-cpu-dai" > +- clocks : A list of clock specifiers in the following order: > + * MI2S OSR clock > + * MI2S Bit clock > +- clock-names : A list of names in the following order: > + * mi2s_osr_clk > + * mi2s_bit_clk If there are names (which is good) why is the ordering important? The whole point in having a mandatory list of names is to remove the ordering and completeness requirements. > +Required properties: > +- compatible : "qcom,lpass-lpaif" > +- reg : Address space for the LPASS subsystem registers > +- reg-names : The name of the LPASS subsystem register address space > +- interrupts : Phandle to the LPASS interrupt > +- interrupt-names : The names of the LPASS interrupt Again you need to document the valid names. > index 0000000000000000000000000000000000000000..d2ff501d44f7b7aa790cdadc8ba75c6a8bf37ccd > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-pcm-mi2s.txt > @@ -0,0 +1,12 @@ > +* Qualcomm Technologies IPQ806x PCM audio interface > + > +This node models the Qualcomm Technologies IPQ806x PCM audio interface. > + > +Required properties: > +- compatible: "qcom,lpass-pcm-mi2s" > + > +Example: > + > +lpass-pcm-mi2s { > + compatible = "qcom,lpass-pcm-mi2s"; > +}; This doesn't appear to describe hardware - there are no register addresses or anything. I'd guess this is most likely part of another hardware block and should be handled by the driver for that device.
diff --git a/Documentation/devicetree/bindings/sound/qcom,ipq806x-snd-card.txt b/Documentation/devicetree/bindings/sound/qcom,ipq806x-snd-card.txt new file mode 100644 index 0000000000000000000000000000000000000000..1187a7f37be3820bbd5bdf4f87ca6d37dcbe1454 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/qcom,ipq806x-snd-card.txt @@ -0,0 +1,41 @@ +* Qualcomm Technologies IPQ806x SoundCard + +This node models the Qualcomm Technologies IPQ806x LPASS Audio SoundCard, +with a connection between the CPU MI2S DAI and the external DAC. + +Required properties: +- compatible : "qcom,ipq806x-snd-card" +- qcom,model : The user-visible name of this sound card +- pinctrl-0 : The default state of the MI2S pins +- pinctrl-names : The name of the default state +- dac-gpios : GPIO specifier to the GPIO -> DAC SDMODE pin +- clocks : A list of clock specifiers in the following order: + * AHBIX bus clock +- clock-names : A list of names in the following order: + * ahbix_clk +asoc-platform : This is phandle list containing the references to platform device + nodes that are used as part of the sound card dai-links. +asoc-platform-names : This property contains list of platform names. The order of + the platform names should match to that of the phandle order + given in "asoc-platform". +asoc-cpu : This is phandle list containing the references to cpu dai device nodes + that are used as part of the sound card dai-links. +asoc-cpu-names : This property contains list of cpu dai names. The order of the + cpu dai names should match to that of the phandle order given + in "asoc-cpu". + +Example: + +sound { + compatible = "qcom,ipq806x-snd-card"; + model = "ipq806x-snd-card"; + pinctrl-0 = <&mi2s_pins>; + pinctrl-names = "default"; + dac-gpios = <&qcom_pinmux 25 0>; + clocks = <&lcc AHBIX_CLK>; + clock-names = "ahbix_clk"; + asoc-platform = <&pcm0>; + asoc-platform-names = "lpass-pcm-mi2s"; + asoc-cpu = <&dai_mi2s>; + asoc-cpu-names = "lpass-cpu-dai"; +}; diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-cpu-dai.txt b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu-dai.txt new file mode 100644 index 0000000000000000000000000000000000000000..8b700c9727fef9969af810376071d2e390625fac --- /dev/null +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu-dai.txt @@ -0,0 +1,20 @@ +* Qualcomm Technologies IPQ806x LPASS DAI + +This node models the Qualcomm Technologies IPQ806x LPASS I2S DAI port. + +Required properties: +- compatible : "qcom,lpass-cpu-dai" +- clocks : A list of clock specifiers in the following order: + * MI2S OSR clock + * MI2S Bit clock +- clock-names : A list of names in the following order: + * mi2s_osr_clk + * mi2s_bit_clk + +Example: + +lpass-cpu-dai { + compatible = "qcom,lpass-cpu-dai"; + clocks = <&lcc MI2S_OSR_CLK>, <&lcc MI2S_BIT_CLK>; + clock-names = "mi2s_osr_clk", "mi2s_bit_clk"; +}; diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-lpaif.txt b/Documentation/devicetree/bindings/sound/qcom,lpass-lpaif.txt new file mode 100644 index 0000000000000000000000000000000000000000..d4feebb81aa9faebe2352a72e02a21dffc2ab331 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-lpaif.txt @@ -0,0 +1,21 @@ +* Qualcomm Technologies IPQ806x LPASS driver + +This node models the Qualcomm Technologies IPQ806x LPASS Audio driver, +which controls the various components within the subsystem. + +Required properties: +- compatible : "qcom,lpass-lpaif" +- reg : Address space for the LPASS subsystem registers +- reg-names : The name of the LPASS subsystem register address space +- interrupts : Phandle to the LPASS interrupt +- interrupt-names : The names of the LPASS interrupt + +Example: + +lpass-lpaif" + compatible = "qcom,lpass-lpaif"; + reg = <0x28100000 0x10000>; + reg-names = "lpass-lpaif-mem"; + interrupts = <0 85 1>; + interrupt-names = "lpass-lpaif-irq"; +}; diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-pcm-mi2s.txt b/Documentation/devicetree/bindings/sound/qcom,lpass-pcm-mi2s.txt new file mode 100644 index 0000000000000000000000000000000000000000..d2ff501d44f7b7aa790cdadc8ba75c6a8bf37ccd --- /dev/null +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-pcm-mi2s.txt @@ -0,0 +1,12 @@ +* Qualcomm Technologies IPQ806x PCM audio interface + +This node models the Qualcomm Technologies IPQ806x PCM audio interface. + +Required properties: +- compatible: "qcom,lpass-pcm-mi2s" + +Example: + +lpass-pcm-mi2s { + compatible = "qcom,lpass-pcm-mi2s"; +};