# 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
additionalProperties: false
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>;
};
