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