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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt')
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diff --git a/kernel/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt b/kernel/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt new file mode 100644 index 000000000..028fa1c82 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt @@ -0,0 +1,155 @@ +STMicroelectronics sti ASoC cards + +The sti ASoC Sound Card can be used, for all sti SoCs using internal sti-sas +codec or external codecs. + +sti sound drivers allows to expose sti SoC audio interface through the +generic ASoC simple card. For details about sound card declaration please refer to +Documentation/devicetree/bindings/sound/simple-card.txt. + +1) sti-uniperiph-dai: audio dai device. +--------------------------------------- + +Required properties: + - compatible: "st,sti-uni-player" or "st,sti-uni-reader" + + - st,syscfg: phandle to boot-device system configuration registers + + - clock-names: name of the clocks listed in clocks property in the same order + + - reg: CPU DAI IP Base address and size entries, listed in same + order than the CPU_DAI properties. + + - reg-names: names of the mapped memory regions listed in regs property in + the same order. + + - interrupts: CPU_DAI interrupt line, listed in the same order than the + CPU_DAI properties. + + - dma: CPU_DAI DMA controller phandle and DMA request line, listed in the same + order than the CPU_DAI properties. + + - dma-names: identifier string for each DMA request line in the dmas property. + "tx" for "st,sti-uni-player" compatibility + "rx" for "st,sti-uni-reader" compatibility + + - version: IP version integrated in SOC. + + - dai-name: DAI name that describes the IP. + +Required properties ("st,sti-uni-player" compatibility only): + - clocks: CPU_DAI IP clock source, listed in the same order than the + CPU_DAI properties. + + - uniperiph-id: internal SOC IP instance ID. + + - IP mode: IP working mode depending on associated codec. + "HDMI" connected to HDMI codec IP and IEC HDMI formats. + "SPDIF"connected to SPDIF codec and support SPDIF formats. + "PCM" PCM standard mode for I2S or TDM bus. + +Optional properties: + - pinctrl-0: defined for CPU_DAI@1 and CPU_DAI@4 to describe I2S PIOs for + external codecs connection. + + - pinctrl-names: should contain only one value - "default". + +Example: + + sti_uni_player2: sti-uni-player@2 { + compatible = "st,sti-uni-player"; + status = "okay"; + #sound-dai-cells = <0>; + st,syscfg = <&syscfg_core>; + clocks = <&clk_s_d0_flexgen CLK_PCM_2>; + reg = <0x8D82000 0x158>; + interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>; + dmas = <&fdma0 4 0 1>; + dai-name = "Uni Player #1 (DAC)"; + dma-names = "tx"; + uniperiph-id = <2>; + version = <5>; + mode = "PCM"; + }; + + sti_uni_player3: sti-uni-player@3 { + compatible = "st,sti-uni-player"; + status = "okay"; + #sound-dai-cells = <0>; + st,syscfg = <&syscfg_core>; + clocks = <&clk_s_d0_flexgen CLK_SPDIFF>; + reg = <0x8D85000 0x158>; + interrupts = <GIC_SPI 89 IRQ_TYPE_NONE>; + dmas = <&fdma0 7 0 1>; + dma-names = "tx"; + dai-name = "Uni Player #1 (PIO)"; + uniperiph-id = <3>; + version = <5>; + mode = "SPDIF"; + }; + + sti_uni_reader1: sti-uni-reader@1 { + compatible = "st,sti-uni-reader"; + status = "disabled"; + #sound-dai-cells = <0>; + st,syscfg = <&syscfg_core>; + reg = <0x8D84000 0x158>; + interrupts = <GIC_SPI 88 IRQ_TYPE_NONE>; + dmas = <&fdma0 6 0 1>; + dma-names = "rx"; + dai-name = "Uni Reader #1 (HDMI RX)"; + version = <3>; + }; + +2) sti-sas-codec: internal audio codec IPs driver +------------------------------------------------- + +Required properties: + - compatible: "st,sti<chip>-sas-codec" . + Should be chip "st,stih416-sas-codec" or "st,stih407-sas-codec" + + - st,syscfg: phandle to boot-device system configuration registers. + + - pinctrl-0: SPDIF PIO description. + + - pinctrl-names: should contain only one value - "default". + +Example: + sti_sas_codec: sti-sas-codec { + compatible = "st,stih407-sas-codec"; + #sound-dai-cells = <1>; + st,reg_audio = <&syscfg_core>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_spdif_out >; + }; + +Example of audio card declaration: + sound { + compatible = "simple-audio-card"; + simple-audio-card,name = "sti audio card"; + status = "okay"; + + simple-audio-card,dai-link@0 { + /* DAC */ + format = "i2s"; + dai-tdm-slot-width = <32>; + cpu { + sound-dai = <&sti_uni_player2>; + }; + + codec { + sound-dai = <&sti_sasg_codec 1>; + }; + }; + simple-audio-card,dai-link@1 { + /* SPDIF */ + format = "left_j"; + cpu { + sound-dai = <&sti_uni_player3>; + }; + + codec { + sound-dai = <&sti_sasg_codec 0>; + }; + }; + }; |