1Samsung Exynos SoC Low Power Audio Subsystem (LPASS) 2 3Required properties: 4 5 - compatible : "samsung,exynos5433-lpass" 6 - reg : should contain the LPASS top SFR region location 7 and size 8 - clock-names : should contain following required clocks: "sfr0_ctrl" 9 - clocks : should contain clock specifiers of all clocks, which 10 input names have been specified in clock-names 11 property, in same order. 12 - #address-cells : should be 1 13 - #size-cells : should be 1 14 - ranges : must be present 15 16Each IP block of the Low Power Audio Subsystem should be specified as 17an optional sub-node. For "samsung,exynos5433-lpass" compatible this includes: 18UART, SLIMBUS, PCM, I2S, DMAC, Timers 0...4, VIC, WDT 0...1 devices. 19 20Bindings of the sub-nodes are described in: 21 ../serial/samsung_uart.yaml 22 ../sound/samsung-i2s.txt 23 ../dma/arm-pl330.txt 24 25 26Example: 27 28audio-subsystem { 29 compatible = "samsung,exynos5433-lpass"; 30 reg = <0x11400000 0x100>, <0x11500000 0x08>; 31 clocks = <&cmu_aud CLK_PCLK_SFR0_CTRL>; 32 clock-names = "sfr0_ctrl"; 33 #address-cells = <1>; 34 #size-cells = <1>; 35 ranges; 36 37 adma: adma@11420000 { 38 compatible = "arm,pl330", "arm,primecell"; 39 reg = <0x11420000 0x1000>; 40 interrupts = <0 73 0>; 41 clocks = <&cmu_aud CLK_ACLK_DMAC>; 42 clock-names = "apb_pclk"; 43 #dma-cells = <1>; 44 #dma-channels = <8>; 45 #dma-requests = <32>; 46 }; 47 48 i2s0: i2s0@11440000 { 49 compatible = "samsung,exynos7-i2s"; 50 reg = <0x11440000 0x100>; 51 dmas = <&adma 0 &adma 2>; 52 dma-names = "tx", "rx"; 53 interrupts = <0 70 0>; 54 clocks = <&cmu_aud CLK_PCLK_AUD_I2S>, 55 <&cmu_aud CLK_SCLK_AUD_I2S>, 56 <&cmu_aud CLK_SCLK_I2S_BCLK>; 57 clock-names = "iis", "i2s_opclk0", "i2s_opclk1"; 58 pinctrl-names = "default"; 59 pinctrl-0 = <&i2s0_bus>; 60 }; 61 62 serial_3: serial@11460000 { 63 compatible = "samsung,exynos5433-uart"; 64 reg = <0x11460000 0x100>; 65 interrupts = <0 67 0>; 66 clocks = <&cmu_aud CLK_PCLK_AUD_UART>, 67 <&cmu_aud CLK_SCLK_AUD_UART>; 68 clock-names = "uart", "clk_uart_baud0"; 69 pinctrl-names = "default"; 70 pinctrl-0 = <&uart_aud_bus>; 71 }; 72 }; 73