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Thu, 27 Jul 2023 17:04:41 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 9F44410002A; Thu, 27 Jul 2023 17:04:39 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 9751D209BA2; Thu, 27 Jul 2023 17:04:39 +0200 (CEST) Received: from localhost (10.201.20.178) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Thu, 27 Jul 2023 17:04:39 +0200 From: Olivier Moysan To: Olivier Moysan , Arnaud Pouliquen , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue , Fabrice Gasnier CC: , , , , , Subject: [RFC v2 03/11] dt-bindings: iio: stm32-dfsdm-adc: add scaling support Date: Thu, 27 Jul 2023 17:03:14 +0200 Message-ID: <20230727150324.1157933-4-olivier.moysan@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230727150324.1157933-1-olivier.moysan@foss.st.com> References: <20230727150324.1157933-1-olivier.moysan@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.178] X-ClientProxiedBy: EQNCAS1NODE3.st.com (10.75.129.80) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-27_07,2023-07-26_01,2023-05-22_02 Message-ID-Hash: KY47KB7X7O6LDIDZB2PWI5HCJPPESGWB X-Message-ID-Hash: KY47KB7X7O6LDIDZB2PWI5HCJPPESGWB X-MailFrom: prvs=5572493f00=olivier.moysan@foss.st.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Add scaling support to STM32 DFSDM. This introduces the following changes: - Add ADC generic channel binding and remove support of deprecated channel bindings. - DFSDM is now implemented as a channel provider, so remove io-channels properties. - Add iio-backend property to connect DFSDM to an SD modulator. Signed-off-by: Olivier Moysan --- .../bindings/iio/adc/st,stm32-dfsdm-adc.yaml | 189 ++++++------------ 1 file changed, 63 insertions(+), 126 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml b/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml index 1970503389aa..128545cedc7f 100644 --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml @@ -85,22 +85,14 @@ patternProperties: description: Specifies the DFSDM filter instance used. maxItems: 1 - interrupts: - maxItems: 1 + '#address-cells': + const: 1 - st,adc-channels: - description: | - List of single-ended channels muxed for this ADC. - On stm32h7 and stm32mp1: - - For st,stm32-dfsdm-adc: up to 8 channels numbered from 0 to 7. - - For st,stm32-dfsdm-dmic: 1 channel numbered from 0 to 7. - $ref: /schemas/types.yaml#/definitions/uint32-array - items: - minimum: 0 - maximum: 7 + '#size-cells': + const: 0 - st,adc-channel-names: - description: List of single-ended channel names. + interrupts: + maxItems: 1 st,filter-order: description: | @@ -111,39 +103,6 @@ patternProperties: $ref: /schemas/types.yaml#/definitions/uint32 maximum: 5 - "#io-channel-cells": - const: 1 - - st,adc-channel-types: - description: | - Single-ended channel input type. - - "SPI_R": SPI with data on rising edge (default) - - "SPI_F": SPI with data on falling edge - - "MANCH_R": manchester codec, rising edge = logic 0, falling edge = logic 1 - - "MANCH_F": manchester codec, rising edge = logic 1, falling edge = logic 0 - items: - enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] - $ref: /schemas/types.yaml#/definitions/non-unique-string-array - - st,adc-channel-clk-src: - description: | - Conversion clock source. - - "CLKIN": external SPI clock (CLKIN x) - - "CLKOUT": internal SPI clock (CLKOUT) (default) - - "CLKOUT_F": internal SPI clock divided by 2 (falling edge). - - "CLKOUT_R": internal SPI clock divided by 2 (rising edge). - items: - enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] - $ref: /schemas/types.yaml#/definitions/non-unique-string-array - - st,adc-alt-channel: - description: - Must be defined if two sigma delta modulators are - connected on same SPI input. - If not set, channel n is connected to SPI input n. - If set, channel n is connected to SPI input n + 1. - type: boolean - st,filter0-sync: description: Set to 1 to synchronize with DFSDM filter instance 0. @@ -157,14 +116,68 @@ patternProperties: items: - const: rx + patternProperties: + "^channel@([0-9]|1[0-9])$": + type: object + $ref: "adc.yaml" + description: Represents the external channels which are connected to the DFSDM. + + properties: + reg: + items: + minimum: 0 + maximum: 19 + + label: + description: | + Unique name to identify channel. + + st,adc-channel-types: + description: | + Single-ended channel input type. + - "SPI_R": SPI with data on rising edge (default) + - "SPI_F": SPI with data on falling edge + - "MANCH_R": manchester codec, rising edge = logic 0, falling edge = logic 1 + - "MANCH_F": manchester codec, rising edge = logic 1, falling edge = logic 0 + items: + enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] + $ref: /schemas/types.yaml#/definitions/non-unique-string-array + + st,adc-channel-clk-src: + description: | + Conversion clock source. + - "CLKIN": external SPI clock (CLKIN x) + - "CLKOUT": internal SPI clock (CLKOUT) (default) + - "CLKOUT_F": internal SPI clock divided by 2 (falling edge). + - "CLKOUT_R": internal SPI clock divided by 2 (rising edge). + items: + enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] + $ref: /schemas/types.yaml#/definitions/non-unique-string-array + + st,adc-alt-channel: + description: + Must be defined if two sigma delta modulators are + connected on same SPI input. + If not set, channel n is connected to SPI input n. + If set, channel n is connected to SPI input n + 1. + type: boolean + + io-backends: + description: | + phandle to an external sigma delta modulator or internal ADC output. + $ref: /schemas/types.yaml#/definitions/phandle + + required: + - reg + - io-backends + + additionalProperties: false + required: - compatible - reg - interrupts - - st,adc-channels - - st,adc-channel-names - st,filter-order - - "#io-channel-cells" allOf: - if: @@ -175,14 +188,6 @@ patternProperties: then: properties: - st,adc-channels: - minItems: 1 - maxItems: 8 - - st,adc-channel-names: - minItems: 1 - maxItems: 8 - st,adc-channel-types: minItems: 1 maxItems: 8 @@ -191,14 +196,6 @@ patternProperties: minItems: 1 maxItems: 8 - io-channels: - description: - From common IIO binding. Used to pipe external sigma delta - modulator or internal ADC output to DFSDM channel. - - required: - - io-channels - - if: properties: compatible: @@ -207,12 +204,6 @@ patternProperties: then: properties: - st,adc-channels: - maxItems: 1 - - st,adc-channel-names: - maxItems: 1 - st,adc-channel-types: maxItems: 1 @@ -237,15 +228,9 @@ patternProperties: "#sound-dai-cells": const: 0 - io-channels: - description: - From common IIO binding. Used to pipe external sigma delta - modulator or internal ADC output to DFSDM channel. - required: - compatible - "#sound-dai-cells" - - io-channels allOf: - if: @@ -278,52 +263,4 @@ allOf: minimum: 0 maximum: 5 -examples: - - | - #include - #include - dfsdm: dfsdm@4400d000 { - compatible = "st,stm32mp1-dfsdm"; - reg = <0x4400d000 0x800>; - clocks = <&rcc DFSDM_K>, <&rcc ADFSDM_K>; - clock-names = "dfsdm", "audio"; - #address-cells = <1>; - #size-cells = <0>; - - dfsdm0: filter@0 { - compatible = "st,stm32-dfsdm-dmic"; - reg = <0>; - interrupts = ; - dmas = <&dmamux1 101 0x400 0x01>; - dma-names = "rx"; - #io-channel-cells = <1>; - st,adc-channels = <1>; - st,adc-channel-names = "dmic0"; - st,adc-channel-types = "SPI_R"; - st,adc-channel-clk-src = "CLKOUT"; - st,filter-order = <5>; - - asoc_pdm0: dfsdm-dai { - compatible = "st,stm32h7-dfsdm-dai"; - #sound-dai-cells = <0>; - io-channels = <&dfsdm0 0>; - }; - }; - - dfsdm_pdm1: filter@1 { - compatible = "st,stm32-dfsdm-adc"; - reg = <1>; - interrupts = ; - dmas = <&dmamux1 102 0x400 0x01>; - dma-names = "rx"; - #io-channel-cells = <1>; - st,adc-channels = <2 3>; - st,adc-channel-names = "in2", "in3"; - st,adc-channel-types = "SPI_R", "SPI_R"; - st,adc-channel-clk-src = "CLKOUT_F", "CLKOUT_F"; - io-channels = <&sd_adc2 &sd_adc3>; - st,filter-order = <1>; - }; - }; - ...