Samsung Exynos SoC Low Power Audio Subsystem (LPASS)
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Required properties:
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- compatible : "samsung,exynos5433-lpass"
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- reg : should contain the LPASS top SFR region location
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and size
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- clock-names : should contain following required clocks: "sfr0_ctrl"
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- clocks : should contain clock specifiers of all clocks, which
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input names have been specified in clock-names
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property, in same order.
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- #address-cells : should be 1
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- #size-cells : should be 1
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- ranges : must be present
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Each IP block of the Low Power Audio Subsystem should be specified as
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an optional sub-node. For "samsung,exynos5433-lpass" compatible this includes:
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UART, SLIMBUS, PCM, I2S, DMAC, Timers 0...4, VIC, WDT 0...1 devices.
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Bindings of the sub-nodes are described in:
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../serial/samsung_uart.txt
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../sound/samsung-i2s.txt
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../dma/arm-pl330.txt
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Example:
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audio-subsystem {
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compatible = "samsung,exynos5433-lpass";
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reg = <0x11400000 0x100>, <0x11500000 0x08>;
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clocks = <&cmu_aud CLK_PCLK_SFR0_CTRL>;
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clock-names = "sfr0_ctrl";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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adma: adma@11420000 {
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compatible = "arm,pl330", "arm,primecell";
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reg = <0x11420000 0x1000>;
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interrupts = <0 73 0>;
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clocks = <&cmu_aud CLK_ACLK_DMAC>;
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clock-names = "apb_pclk";
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#dma-cells = <1>;
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#dma-channels = <8>;
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#dma-requests = <32>;
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};
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i2s0: i2s0@11440000 {
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compatible = "samsung,exynos7-i2s";
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reg = <0x11440000 0x100>;
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dmas = <&adma 0 &adma 2>;
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dma-names = "tx", "rx";
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interrupts = <0 70 0>;
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clocks = <&cmu_aud CLK_PCLK_AUD_I2S>,
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<&cmu_aud CLK_SCLK_AUD_I2S>,
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<&cmu_aud CLK_SCLK_I2S_BCLK>;
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clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
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pinctrl-names = "default";
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pinctrl-0 = <&i2s0_bus>;
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};
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serial_3: serial@11460000 {
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compatible = "samsung,exynos5433-uart";
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reg = <0x11460000 0x100>;
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interrupts = <0 67 0>;
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clocks = <&cmu_aud CLK_PCLK_AUD_UART>,
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<&cmu_aud CLK_SCLK_AUD_UART>;
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clock-names = "uart", "clk_uart_baud0";
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pinctrl-names = "default";
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pinctrl-0 = <&uart_aud_bus>;
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};
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};
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