| Message ID | 20230727150324.1157933-4-olivier.moysan@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iio: add iio backend device type | expand |
On Thu, Jul 27, 2023 at 05:03:14PM +0200, Olivier Moysan wrote: > Add scaling support to STM32 DFSDM. > > This introduces the following changes: Why? > - Add ADC generic channel binding and remove support of deprecated > channel bindings. When was it deprecated? > - DFSDM is now implemented as a channel provider, so remove io-channels > properties. > - Add iio-backend property to connect DFSDM to an SD modulator. io-backends All sorts of ABI issues with this change. Please explain why you don't care. > > Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> > --- > .../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 <dt-bindings/interrupt-controller/arm-gic.h> > - #include <dt-bindings/clock/stm32mp1-clks.h> > - 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 = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>; > - 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 = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; > - 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>; > - }; > - }; > - > ... > -- > 2.25.1 >
Hi Rob, On 8/11/23 19:10, Rob Herring wrote: > On Thu, Jul 27, 2023 at 05:03:14PM +0200, Olivier Moysan wrote: >> Add scaling support to STM32 DFSDM. >> >> This introduces the following changes: > > Why? > This RFC is an attempt to support scaling through a change in DFSDM topology. These changes have some impacts on DFSDM and sd modulator bindings. To keep things simple in this RFC, I skipped legacy support, to put the emphasis on the new bindings proposal. There are two changes here: adoption of the generic IIO bindings and new "io-backends" property. This needs to be put in two separate patches at the end, I think (as already done for driver patches) Anyway, the current bindings would become deprecated with these changes. I still have to consider how to support these legacy bindings for next step, However. BRs Olivier >> - Add ADC generic channel binding and remove support of deprecated >> channel bindings. > > When was it deprecated? > >> - DFSDM is now implemented as a channel provider, so remove io-channels >> properties. >> - Add iio-backend property to connect DFSDM to an SD modulator. > > io-backends > > All sorts of ABI issues with this change. Please explain why you don't > care. > >> >> Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> >> --- >> .../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 <dt-bindings/interrupt-controller/arm-gic.h> >> - #include <dt-bindings/clock/stm32mp1-clks.h> >> - 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 = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>; >> - 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 = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; >> - 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>; >> - }; >> - }; >> - >> ... >> -- >> 2.25.1 >>
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 <dt-bindings/interrupt-controller/arm-gic.h> - #include <dt-bindings/clock/stm32mp1-clks.h> - 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 = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>; - 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 = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; - 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>; - }; - }; - ...
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 <olivier.moysan@foss.st.com> --- .../bindings/iio/adc/st,stm32-dfsdm-adc.yaml | 189 ++++++------------ 1 file changed, 63 insertions(+), 126 deletions(-)