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-* Samsung I2S controller
-
-Required SoC Specific Properties:
-
-- compatible : should be one of the following.
- - samsung,s3c6410-i2s: for 8/16/24bit stereo I2S.
- - samsung,s5pv210-i2s: for 8/16/24bit multichannel(5.1) I2S with
- secondary fifo, s/w reset control and internal mux for root clk src.
- - samsung,exynos5420-i2s: for 8/16/24bit multichannel(5.1) I2S for
- playback, stereo channel capture, secondary fifo using internal
- or external dma, s/w reset control, internal mux for root clk src
- and 7.1 channel TDM support for playback. TDM (Time division multiplexing)
- is to allow transfer of multiple channel audio data on single data line.
- - samsung,exynos7-i2s: with all the available features of exynos5 i2s,
- exynos7 I2S has 7.1 channel TDM support for capture, secondary fifo
- with only external dma and more no.of root clk sampling frequencies.
- - samsung,exynos7-i2s1: I2S1 on previous samsung platforms supports
- stereo channels. exynos7 i2s1 upgraded to 5.1 multichannel with
- slightly modified bit offsets.
-
-- reg: physical base address of the controller and length of memory mapped
- region.
-- dmas: list of DMA controller phandle and DMA request line ordered pairs.
-- dma-names: identifier string for each DMA request line in the dmas property.
- These strings correspond 1:1 with the ordered pairs in dmas.
-- clocks: Handle to iis clock and RCLK source clk.
-- clock-names:
- i2s0 uses some base clocks from CMU and some are from audio subsystem internal
- clock controller. The clock names for i2s0 should be "iis", "i2s_opclk0" and
- "i2s_opclk1" as shown in the example below.
- i2s1 and i2s2 uses clocks from CMU. The clock names for i2s1 and i2s2 should
- be "iis" and "i2s_opclk0".
- "iis" is the i2s bus clock and i2s_opclk0, i2s_opclk1 are sources of the root
- clk. i2s0 has internal mux to select the source of root clk and i2s1 and i2s2
- doesn't have any such mux.
-- #clock-cells: should be 1, this property must be present if the I2S device
- is a clock provider in terms of the common clock bindings, described in
- ../clock/clock-bindings.txt.
-- clock-output-names (deprecated): from the common clock bindings, names of
- the CDCLK I2S output clocks, suggested values are "i2s_cdclk0", "i2s_cdclk1",
- "i2s_cdclk3" for the I2S0, I2S1, I2S2 devices respectively.
-
-There are following clocks available at the I2S device nodes:
- CLK_I2S_CDCLK - the CDCLK (CODECLKO) gate clock,
- CLK_I2S_RCLK_PSR - the RCLK prescaler divider clock (corresponding to the
- IISPSR register),
- CLK_I2S_RCLK_SRC - the RCLKSRC mux clock (corresponding to RCLKSRC bit in
- IISMOD register).
-
-Refer to the SoC datasheet for availability of the above clocks.
-The CLK_I2S_RCLK_PSR and CLK_I2S_RCLK_SRC clocks are usually only available
-in the IIS Multi Audio Interface.
-
-Note: Old DTs may not have the #clock-cells property and then not use the I2S
-node as a clock supplier.
-
-Optional SoC Specific Properties:
-
-- samsung,idma-addr: Internal DMA register base address of the audio
- sub system(used in secondary sound source).
-- pinctrl-0: Should specify pin control groups used for this controller.
-- pinctrl-names: Should contain only one value - "default".
-- #sound-dai-cells: should be 1.
-
-
-Example:
-
-i2s0: i2s@3830000 {
- compatible = "samsung,s5pv210-i2s";
- reg = <0x03830000 0x100>;
- dmas = <&pdma0 10
- &pdma0 9
- &pdma0 8>;
- dma-names = "tx", "rx", "tx-sec";
- clocks = <&clock_audss EXYNOS_I2S_BUS>,
- <&clock_audss EXYNOS_I2S_BUS>,
- <&clock_audss EXYNOS_SCLK_I2S>;
- clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
- #clock-cells = <1>;
- samsung,idma-addr = <0x03000000>;
- pinctrl-names = "default";
- pinctrl-0 = <&i2s0_bus>;
- #sound-dai-cells = <1>;
-};
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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/samsung-i2s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung SoC I2S controller
+
+maintainers:
+ - Krzysztof Kozlowski <krzk@kernel.org>
+ - Sylwester Nawrocki <s.nawrocki@samsung.com>
+
+properties:
+ compatible:
+ description: |
+ samsung,s3c6410-i2s: for 8/16/24bit stereo I2S.
+
+ samsung,s5pv210-i2s: for 8/16/24bit multichannel (5.1) I2S with
+ secondary FIFO, s/w reset control and internal mux for root clock
+ source.
+
+ samsung,exynos5420-i2s: for 8/16/24bit multichannel (5.1) I2S for
+ playback, stereo channel capture, secondary FIFO using internal
+ or external DMA, s/w reset control, internal mux for root clock
+ source and 7.1 channel TDM support for playback; TDM (Time division
+ multiplexing) is to allow transfer of multiple channel audio data on
+ single data line.
+
+ samsung,exynos7-i2s: with all the available features of Exynos5 I2S.
+ Exynos7 I2S has 7.1 channel TDM support for capture, secondary FIFO
+ with only external DMA and more number of root clock sampling
+ frequencies.
+
+ samsung,exynos7-i2s1: I2S1 on previous samsung platforms supports
+ stereo channels. Exynos7 I2S1 upgraded to 5.1 multichannel with
+ slightly modified bit offsets.
+ enum:
+ - samsung,s3c6410-i2s
+ - samsung,s5pv210-i2s
+ - samsung,exynos5420-i2s
+ - samsung,exynos7-i2s
+ - samsung,exynos7-i2s1
+
+ reg:
+ maxItems: 1
+
+ dmas:
+ minItems: 2
+ maxItems: 3
+
+ dma-names:
+ oneOf:
+ - items:
+ - const: tx
+ - const: rx
+ - items:
+ - const: tx
+ - const: rx
+ - const: tx-sec
+
+ clocks:
+ minItems: 1
+ maxItems: 3
+
+ clock-names:
+ oneOf:
+ - items:
+ - const: iis
+ - items: # for I2S0
+ - const: iis
+ - const: i2s_opclk0
+ - const: i2s_opclk1
+ - items: # for I2S1 and I2S2
+ - const: iis
+ - const: i2s_opclk0
+ description: |
+ "iis" is the I2S bus clock and i2s_opclk0, i2s_opclk1 are sources
+ of the root clock. I2S0 has internal mux to select the source
+ of root clock and I2S1 and I2S2 doesn't have any such mux.
+
+ "#clock-cells":
+ const: 1
+
+ clock-output-names:
+ deprecated: true
+ oneOf:
+ - items: # for I2S0
+ - const: i2s_cdclk0
+ - items: # for I2S1
+ - const: i2s_cdclk1
+ - items: # for I2S2
+ - const: i2s_cdclk2
+ description: Names of the CDCLK I2S output clocks.
+
+ samsung,idma-addr:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Internal DMA register base address of the audio
+ subsystem (used in secondary sound source).
+
+ pinctrl-0:
+ description: Should specify pin control groups used for this controller.
+
+ pinctrl-names:
+ const: default
+
+ "#sound-dai-cells":
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - dmas
+ - dma-names
+ - clocks
+ - clock-names
+
+examples:
+ - |
+ #include <dt-bindings/clock/exynos-audss-clk.h>
+
+ i2s0: i2s@3830000 {
+ compatible = "samsung,s5pv210-i2s";
+ reg = <0x03830000 0x100>;
+ dmas = <&pdma0 10>,
+ <&pdma0 9>,
+ <&pdma0 8>;
+ dma-names = "tx", "rx", "tx-sec";
+ clocks = <&clock_audss EXYNOS_I2S_BUS>,
+ <&clock_audss EXYNOS_I2S_BUS>,
+ <&clock_audss EXYNOS_SCLK_I2S>;
+ clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
+ #clock-cells = <1>;
+ samsung,idma-addr = <0x03000000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2s0_bus>;
+ #sound-dai-cells = <1>;
+ };