On Thu, Jan 30, 2020 at 02:50:40PM +0100, Olivier Moysan wrote: > Convert the STM32 SAI bindings to DT schema format using json-schema. > > Signed-off-by: Olivier Moysan <olivier.moysan@xxxxxx> > --- > .../bindings/sound/st,stm32-sai.txt | 107 ---------- > .../bindings/sound/st,stm32-sai.yaml | 193 ++++++++++++++++++ > 2 files changed, 193 insertions(+), 107 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/sound/st,stm32-sai.txt > create mode 100644 Documentation/devicetree/bindings/sound/st,stm32-sai.yaml > diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.yaml b/Documentation/devicetree/bindings/sound/st,stm32-sai.yaml > new file mode 100644 > index 000000000000..33dca007fc86 > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.yaml > @@ -0,0 +1,193 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/sound/st,stm32-sai.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: STMicroelectronics STM32 Serial Audio Interface (SAI) > + > +maintainers: > + - Olivier Moysan <olivier.moysan@xxxxxx> > + > +description: > + The SAI interface (Serial Audio Interface) offers a wide set of audio > + protocols as I2S standards, LSB or MSB-justified, PCM/DSP, TDM, and AC'97. > + The SAI contains two independent audio sub-blocks. Each sub-block has > + its own clock generator and I/O lines controller. > + > +properties: > + compatible: > + enum: > + - st,stm32f4-sai > + - st,stm32h7-sai > + > + reg: > + items: > + - description: Base address and size of SAI common register set. > + - description: Base address and size of SAI identification register set. > + minItems: 1 > + maxItems: 2 > + > + ranges: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + resets: > + maxItems: 1 > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 1 > + > + clocks: > + items: > + - description: pclk feeds the peripheral bus interface. > + - description: x8k, SAI parent clock for sampling rates multiple of 8kHz. > + - description: x11k, SAI parent clock for sampling rates multiple of 11.025kHz. > + > + clock-names: > + items: > + enum: [ pclk, x8k, x11k ] > + minItems: 3 > + maxItems: 3 > + > +required: > + - compatible > + - reg > + - ranges > + - "#address-cells" > + - "#size-cells" > + - clocks > + - clock-names > + > +patternProperties: > + "^audio-controller@[0-9a-f]+$": > + type: object > + description: > + Two subnodes corresponding to SAI sub-block instances A et B > + can be defined. Subnode can be omitted for unsused sub-block. > + > + properties: > + compatible: > + description: Compatible for SAI sub-block A or B. > + enum: > + - st,stm32-sai-sub-a > + - st,stm32-sai-sub-b pattern: 'st,stm32-sai-sub-[ab]' > + > + "#sound-dai-cells": > + const: 0 > + > + reg: > + maxItems: 1 > + > + clocks: > + items: > + - description: sai_ck clock feeding the internal clock generator. > + - description: MCLK clock from a SAI set as master clock provider. > + minItems: 1 > + maxItems: 2 > + > + clock-names: > + items: > + - const: sai_ck > + - const: MCLK > + minItems: 1 > + maxItems: 2 > + > + dmas: > + items: > + - description: SAI sub-block is configured as a capture DAI. > + - description: SAI sub-block is configured as a playback DAI. > + minItems: 1 > + maxItems: 1 This is defining that dmas has 2 entries, but then limits it to the 1st entry only. > + > + dma-names: > + items: > + - enum: [ rx, tx ] > + > + st,sync: > + description: > + Configure the SAI sub-block as slave of another SAI sub-block. > + By default SAI sub-block is in asynchronous mode. > + Must contain the phandle and index of the SAI sub-block providing > + the synchronization. > + allOf: > + - $ref: /schemas/types.yaml#definitions/phandle-array > + - maxItems: 1 > + > + st,iec60958: > + description: > + If set, support S/PDIF IEC6958 protocol for playback. > + IEC60958 protocol is not available for capture. > + By default, custom protocol is assumed, meaning that protocol is > + configured according to protocol defined in related DAI link node, > + such as i2s, left justified, right justified, dsp and pdm protocols. > + allOf: > + - $ref: /schemas/types.yaml#definitions/flag > + > + "#clock-cells": > + description: Configure the SAI device as master clock provider. > + const: 0 > + > + required: > + - compatible > + - "#sound-dai-cells" > + - reg > + - clocks > + - clock-names > + - dmas > + - dma-names additionalProperties: false. > + > +allOf: > + - if: > + properties: > + compatible: > + contains: > + const: st,stm32f4-sai > + > + - then: > + properties: > + clocks: > + minItems: 2 > + maxItems: 2 > + > + clock-names: > + items: > + enum: [ x8k, x11k ] Define the order. > + minItems: 2 > + maxItems: 2 > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/clock/stm32mp1-clks.h> > + #include <dt-bindings/reset/stm32mp1-resets.h> > + sai1: sai@4400a000 { > + compatible = "st,stm32h7-sai"; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0 0x4400a000 0x400>; > + reg = <0x4400a000 0x4>, <0x4400a3f0 0x10>; > + interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&rcc SAI1>, <&rcc PLL1_Q>, <&rcc PLL2_P>; > + clock-names = "pclk", "x8k", "x11k"; > + resets = <&rcc SAI1_R>; > + > + sai1a: audio-controller@4400a004 { > + compatible = "st,stm32-sai-sub-a"; > + #sound-dai-cells = <0>; > + reg = <0x4 0x1c>; > + clocks = <&rcc SAI1_K>; > + clock-names = "sai_ck"; > + dmas = <&dmamux1 87 0x400 0x01>; > + dma-names = "tx"; > + }; > + }; > + > +... > -- > 2.17.1 >
