1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 $id: http://devicetree.org/schemas/sound/st,stm32-sai.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 Serial Audio Interface (SAI)
13 The SAI interface (Serial Audio Interface) offers a wide set of audio
14 protocols as I2S standards, LSB or MSB-justified, PCM/DSP, TDM, and AC'97.
15 The SAI contains two independent audio sub-blocks. Each sub-block has
16 its own clock generator and I/O lines controller.
26 - description: Base address and size of SAI common register set.
27 - description: Base address and size of SAI identification register set.
65 "^audio-controller@[0-9a-f]+$":
67 additionalProperties: false
69 Two subnodes corresponding to SAI sub-block instances A et B
70 can be defined. Subnode can be omitted for unused sub-block.
74 description: Compatible for SAI sub-block A or B.
75 pattern: "^st,stm32-sai-sub-[ab]$"
85 - description: sai_ck clock feeding the internal clock generator.
86 - description: MCLK clock from a SAI set as master clock provider.
100 rx: SAI sub-block is configured as a capture DAI.
101 tx: SAI sub-block is configured as a playback DAI.
106 Configure the SAI sub-block as slave of another SAI sub-block.
107 By default SAI sub-block is in asynchronous mode.
108 Must contain the phandle and index of the SAI sub-block providing
110 $ref: /schemas/types.yaml#/definitions/phandle-array
113 - description: phandle of the SAI sub-block
114 - description: index of the SAI sub-block
118 If set, support S/PDIF IEC6958 protocol for playback.
119 IEC60958 protocol is not available for capture.
120 By default, custom protocol is assumed, meaning that protocol is
121 configured according to protocol defined in related DAI link node,
122 such as i2s, left justified, right justified, dsp and pdm protocols.
123 $ref: /schemas/types.yaml#/definitions/flag
126 description: Configure the SAI device as master clock provider.
130 $ref: audio-graph-port.yaml#
131 unevaluatedProperties: false
147 const: st,stm32f4-sai
152 - description: x8k, SAI parent clock for sampling rates multiple of 8kHz.
153 - description: x11k, SAI parent clock for sampling rates multiple of 11.025kHz.
163 - description: pclk feeds the peripheral bus interface.
164 - description: x8k, SAI parent clock for sampling rates multiple of 8kHz.
165 - description: x11k, SAI parent clock for sampling rates multiple of 11.025kHz.
173 additionalProperties: false
177 #include <dt-bindings/interrupt-controller/arm-gic.h>
178 #include <dt-bindings/clock/stm32mp1-clks.h>
179 #include <dt-bindings/reset/stm32mp1-resets.h>
181 compatible = "st,stm32h7-sai";
182 #address-cells = <1>;
184 ranges = <0 0x4400b000 0x400>;
185 reg = <0x4400b000 0x4>, <0x4400b3f0 0x10>;
186 clocks = <&rcc SAI2>, <&rcc PLL3_Q>, <&rcc PLL3_R>;
187 clock-names = "pclk", "x8k", "x11k";
188 pinctrl-names = "default", "sleep";
189 pinctrl-0 = <&sai2a_pins_a>, <&sai2b_pins_b>;
190 pinctrl-1 = <&sai2a_sleep_pins_a>, <&sai2b_sleep_pins_b>;
192 sai2a: audio-controller@4400b004 {
193 #sound-dai-cells = <0>;
194 compatible = "st,stm32-sai-sub-a";
196 dmas = <&dmamux1 89 0x400 0x01>;
198 clocks = <&rcc SAI2_K>;
199 clock-names = "sai_ck";