This patch adds DT bindings for the new Microchip PDMC embedded in sama7g5 SoCs. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx> --- .../devicetree/bindings/sound/mchp,pdmc.yaml | 99 +++++++++++++++++++ include/dt-bindings/sound/mchp,pdmc.h | 13 +++ 2 files changed, 112 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/mchp,pdmc.yaml create mode 100644 include/dt-bindings/sound/mchp,pdmc.h diff --git a/Documentation/devicetree/bindings/sound/mchp,pdmc.yaml b/Documentation/devicetree/bindings/sound/mchp,pdmc.yaml new file mode 100644 index 000000000000..bdf5c52c29d9 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/mchp,pdmc.yaml @@ -0,0 +1,99 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/mchp,pdmc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microchip PDMC Device Tree Bindings + +maintainers: + - Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx> + +description: + The Microchip Pulse Density Microphone Controller (PDMC) interfaces up to 4 digital microphones + having Pulse Density Modulated (PDM) outputs. + +properties: + "#sound-dai-cells": + const: 0 + + compatible: + const: microchip,sama7g5-pdmc + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Peripheral Bus Clock + - description: Generic Clock + + clock-names: + items: + - const: pclk + - const: gclk + + dmas: + description: RX DMA Channel + maxItems: 1 + + dma-names: + const: rx + + microchip,mic-pos: + description: | + Position of PDM microphones on the DS line and the sampling edge (rising or falling) of the + CLK line. A microphone is represented as a pair of DS line and the sampling edge. The first + microhpone is mapped to channel 0, the second to channel 1, etc. + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + items: + - description: value for DS line + - description: value for sampling edge + anyOf: + - enum: + - [0, 0] + - [0, 1] + - [1, 0] + - [1, 1] + minItems: 1 + maxItems: 4 + uniqueItems: true + +required: + - "#sound-dai-cells" + - compatible + - reg + - interrupts + - clocks + - clock-names + - dmas + - dma-names + - microchip,mic-pos + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/at91.h> + #include <dt-bindings/dma/at91.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/sound/mchp,pdmc.h> + + pdmc: pdmc@e1608000 { + #sound-dai-cells = <0>; + compatible = "microchip,sama7g5-pdmc"; + reg = <0xe1608000 0x4000>; + interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>; + dmas = <&dma0 AT91_XDMAC_DT_PERID(37)>; + dma-names = "rx"; + clocks = <&pmc PMC_TYPE_PERIPHERAL 68>, <&pmc PMC_TYPE_GCK 68>; + clock-names = "pclk", "gclk"; + microchip,mic-pos = <MCHP_PDMC_DS0 MCHP_PDMC_CLK_POSITIVE>, + <MCHP_PDMC_DS0 MCHP_PDMC_CLK_NEGATIVE>, + <MCHP_PDMC_DS1 MCHP_PDMC_CLK_POSITIVE>, + <MCHP_PDMC_DS1 MCHP_PDMC_CLK_NEGATIVE>; + }; diff --git a/include/dt-bindings/sound/mchp,pdmc.h b/include/dt-bindings/sound/mchp,pdmc.h new file mode 100644 index 000000000000..543c424a5a6f --- /dev/null +++ b/include/dt-bindings/sound/mchp,pdmc.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __DT_BINDINGS_MCHP_PDMC_H__ +#define __DT_BINDINGS_MCHP_PDMC_H__ + +/* PDM microphone's pin placement */ +#define MCHP_PDMC_DS0 0 +#define MCHP_PDMC_DS1 1 + +/* PDM microphone clock edge sampling */ +#define MCHP_PDMC_CLK_POSITIVE 0 +#define MCHP_PDMC_CLK_NEGATIVE 1 + +#endif /* __DT_BINDINGS_MCHP_PDMC_H__ */ -- 2.32.0
