| Message ID | 20240625150717.1038212-5-olivier.moysan@foss.st.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | iio: adc: dfsdm: add scaling support | expand |
On Tue, Jun 25, 2024 at 05:07:12PM +0200, Olivier Moysan wrote: > Change the DFSDM binding to use the new IIO backend framework, > along with the adoption of IIO generic channels. > This binding change allows to add scaling support to the DFSDM. > > Keep the legacy binding as deprecated for backward compatibility. > > The io-backends property is supported only in generic IIO channel > binding. > > - Channel description with the generic binding (Audio and Analog): > > Properties superseded by generic properties: > st,adc-channels: becomes "reg" property in channel node > st,adc-channel-names: becomes "label" property in channel node > Properties moved to channel child node: > st,adc-channel-types: becomes st,adc-channel-type > st,adc-channel-clk-src, st,adc-alt-channel > > - Analog binding: > > DFSDM filter channel is configured as an IIO backend consumer. > Add io-backends property in channel child nodes. > > DFSDM is no more configured as a channel consumer from SD modulator. > Use of io-channels in DFSDM node is deprecated. > > - Audio binding: > > DFSDM audio DAI is configured as a channel consumer from DFSDM filter. > No change compare to legacy. > > Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> > --- > .../bindings/iio/adc/st,stm32-dfsdm-adc.yaml | 157 +++++++++++++++++- > 1 file changed, 151 insertions(+), 6 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 c1b1324fa132..1802120b16b0 100644 > --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml > +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml > @@ -102,9 +102,11 @@ patternProperties: > items: > minimum: 0 > maximum: 7 > + deprecated: true > > st,adc-channel-names: > description: List of single-ended channel names. > + deprecated: true > > st,filter-order: > description: | > @@ -118,6 +120,12 @@ patternProperties: > "#io-channel-cells": > const: 1 > > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > st,adc-channel-types: > description: | > Single-ended channel input type. > @@ -128,6 +136,7 @@ patternProperties: > items: > enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] > $ref: /schemas/types.yaml#/definitions/non-unique-string-array > + deprecated: true > > st,adc-channel-clk-src: > description: | > @@ -139,6 +148,7 @@ patternProperties: > items: > enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] > $ref: /schemas/types.yaml#/definitions/non-unique-string-array > + deprecated: true > > st,adc-alt-channel: > description: > @@ -147,6 +157,7 @@ patternProperties: > If not set, channel n is connected to SPI input n. > If set, channel n is connected to SPI input n + 1. > type: boolean > + deprecated: true > > st,filter0-sync: > description: > @@ -165,11 +176,64 @@ patternProperties: > - compatible > - reg > - interrupts > - - st,adc-channels > - - st,adc-channel-names > - st,filter-order > - "#io-channel-cells" > > + patternProperties: > + "^channel@([0-9]|1[0-9])$": Unit-addresses are normally hex. And according to reg below, the max value is 8. > + type: object > + $ref: adc.yaml > + description: Represents the external channels which are connected to the DFSDM. > + > + properties: > + reg: > + items: > + minimum: 0 > + maximum: 8 More than 1 reg entry valid? Either way, you need maxItems. Or you can just drop 'items' > + > + label: > + description: > + Unique name to identify which channel this is. > + > + st,adc-channel-type: > + 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: 'items' is for arrays, but... > + enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] > + $ref: /schemas/types.yaml#/definitions/string not an 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: ditto > + enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] > + $ref: /schemas/types.yaml#/definitions/string > + > + 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: > + Used to pipe external sigma delta modulator or internal ADC backend to DFSDM channel. How many entries (maxItems)? > + > + required: > + - reg > + > + additionalProperties: false Put this next to the $ref for the node. And switch to unevaluatedProperties and drop 'label' from here. > + > allOf: > - if: > properties: > @@ -199,9 +263,19 @@ patternProperties: > description: > From common IIO binding. Used to pipe external sigma delta > modulator or internal ADC output to DFSDM channel. > + deprecated: true > > - required: > - - io-channels > + if: > + required: > + - st,adc-channels > + then: > + required: > + - io-channels > + > + patternProperties: > + "^channel@([0-9]|1[0-9])$": > + required: > + - io-backends Don't think this is needed here. If channel node is present, the io-backends should always be required, right? Then this can go under the node schema. Rob
Hi Rob, On 6/28/24 23:35, Rob Herring wrote: > On Tue, Jun 25, 2024 at 05:07:12PM +0200, Olivier Moysan wrote: >> Change the DFSDM binding to use the new IIO backend framework, >> along with the adoption of IIO generic channels. >> This binding change allows to add scaling support to the DFSDM. >> >> Keep the legacy binding as deprecated for backward compatibility. >> >> The io-backends property is supported only in generic IIO channel >> binding. >> >> - Channel description with the generic binding (Audio and Analog): >> >> Properties superseded by generic properties: >> st,adc-channels: becomes "reg" property in channel node >> st,adc-channel-names: becomes "label" property in channel node >> Properties moved to channel child node: >> st,adc-channel-types: becomes st,adc-channel-type >> st,adc-channel-clk-src, st,adc-alt-channel >> >> - Analog binding: >> >> DFSDM filter channel is configured as an IIO backend consumer. >> Add io-backends property in channel child nodes. >> >> DFSDM is no more configured as a channel consumer from SD modulator. >> Use of io-channels in DFSDM node is deprecated. >> >> - Audio binding: >> >> DFSDM audio DAI is configured as a channel consumer from DFSDM filter. >> No change compare to legacy. >> >> Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> >> --- >> .../bindings/iio/adc/st,stm32-dfsdm-adc.yaml | 157 +++++++++++++++++- >> 1 file changed, 151 insertions(+), 6 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 c1b1324fa132..1802120b16b0 100644 >> --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml >> +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml >> @@ -102,9 +102,11 @@ patternProperties: >> items: >> minimum: 0 >> maximum: 7 >> + deprecated: true >> >> st,adc-channel-names: >> description: List of single-ended channel names. >> + deprecated: true >> >> st,filter-order: >> description: | >> @@ -118,6 +120,12 @@ patternProperties: >> "#io-channel-cells": >> const: 1 >> >> + '#address-cells': >> + const: 1 >> + >> + '#size-cells': >> + const: 0 >> + >> st,adc-channel-types: >> description: | >> Single-ended channel input type. >> @@ -128,6 +136,7 @@ patternProperties: >> items: >> enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] >> $ref: /schemas/types.yaml#/definitions/non-unique-string-array >> + deprecated: true >> >> st,adc-channel-clk-src: >> description: | >> @@ -139,6 +148,7 @@ patternProperties: >> items: >> enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] >> $ref: /schemas/types.yaml#/definitions/non-unique-string-array >> + deprecated: true >> >> st,adc-alt-channel: >> description: >> @@ -147,6 +157,7 @@ patternProperties: >> If not set, channel n is connected to SPI input n. >> If set, channel n is connected to SPI input n + 1. >> type: boolean >> + deprecated: true >> >> st,filter0-sync: >> description: >> @@ -165,11 +176,64 @@ patternProperties: >> - compatible >> - reg >> - interrupts >> - - st,adc-channels >> - - st,adc-channel-names >> - st,filter-order >> - "#io-channel-cells" >> >> + patternProperties: >> + "^channel@([0-9]|1[0-9])$": > > Unit-addresses are normally hex. And according to reg below, the max > value is 8. > Right. The maximum number of serial interfaces is 8. So, the pattern can be reduced to "^channel@([0-7])$": >> + type: object >> + $ref: adc.yaml >> + description: Represents the external channels which are connected to the DFSDM. >> + >> + properties: >> + reg: >> + items: >> + minimum: 0 >> + maximum: 8 > > More than 1 reg entry valid? Either way, you need maxItems. Or you can > just drop 'items' > Added "maxItems: 1" and dropped items. >> + >> + label: >> + description: >> + Unique name to identify which channel this is. >> + >> + st,adc-channel-type: >> + 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: > > 'items' is for arrays, but... > Removed items >> + enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] >> + $ref: /schemas/types.yaml#/definitions/string > > not an 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: > > ditto > Done >> + enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] >> + $ref: /schemas/types.yaml#/definitions/string >> + >> + 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: >> + Used to pipe external sigma delta modulator or internal ADC backend to DFSDM channel. > > How many entries (maxItems)? > >> + >> + required: >> + - reg >> + >> + additionalProperties: false > > Put this next to the $ref for the node. And switch to > unevaluatedProperties and drop 'label' from here. > Done >> + >> allOf: >> - if: >> properties: >> @@ -199,9 +263,19 @@ patternProperties: >> description: >> From common IIO binding. Used to pipe external sigma delta >> modulator or internal ADC output to DFSDM channel. >> + deprecated: true >> >> - required: >> - - io-channels >> + if: >> + required: >> + - st,adc-channels >> + then: >> + required: >> + - io-channels >> + >> + patternProperties: >> + "^channel@([0-9]|1[0-9])$": >> + required: >> + - io-backends > > Don't think this is needed here. If channel node is present, the > io-backends should always be required, right? Then this can go under the > node schema. > The io-backends property is required only when we use st,stm32-dfsdm-adc compatible. In other words, when we are in an analog use case. In this case the channel is a consumer of a backend (typically a sd modulator) In an audio use case (compatible st,stm32-dfsdm-dmic) the backend is not required. BRs Olivier > Rob > >
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 c1b1324fa132..1802120b16b0 100644 --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml @@ -102,9 +102,11 @@ patternProperties: items: minimum: 0 maximum: 7 + deprecated: true st,adc-channel-names: description: List of single-ended channel names. + deprecated: true st,filter-order: description: | @@ -118,6 +120,12 @@ patternProperties: "#io-channel-cells": const: 1 + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + st,adc-channel-types: description: | Single-ended channel input type. @@ -128,6 +136,7 @@ patternProperties: items: enum: [ SPI_R, SPI_F, MANCH_R, MANCH_F ] $ref: /schemas/types.yaml#/definitions/non-unique-string-array + deprecated: true st,adc-channel-clk-src: description: | @@ -139,6 +148,7 @@ patternProperties: items: enum: [ CLKIN, CLKOUT, CLKOUT_F, CLKOUT_R ] $ref: /schemas/types.yaml#/definitions/non-unique-string-array + deprecated: true st,adc-alt-channel: description: @@ -147,6 +157,7 @@ patternProperties: If not set, channel n is connected to SPI input n. If set, channel n is connected to SPI input n + 1. type: boolean + deprecated: true st,filter0-sync: description: @@ -165,11 +176,64 @@ patternProperties: - compatible - reg - interrupts - - st,adc-channels - - st,adc-channel-names - st,filter-order - "#io-channel-cells" + patternProperties: + "^channel@([0-9]|1[0-9])$": + type: object + $ref: adc.yaml + description: Represents the external channels which are connected to the DFSDM. + + properties: + reg: + items: + minimum: 0 + maximum: 8 + + label: + description: + Unique name to identify which channel this is. + + st,adc-channel-type: + 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/string + + 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 ] + $ref: /schemas/types.yaml#/definitions/string + + st,adc-alt-channel: + description: + Must be defined if two sigma delta modulators are + connected on same SPI input. + If not set, channel n is connected to SPI input n. + If set, channel n is connected to SPI input n + 1. + type: boolean + + io-backends: + description: + Used to pipe external sigma delta modulator or internal ADC backend to DFSDM channel. + + required: + - reg + + additionalProperties: false + allOf: - if: properties: @@ -199,9 +263,19 @@ patternProperties: description: From common IIO binding. Used to pipe external sigma delta modulator or internal ADC output to DFSDM channel. + deprecated: true - required: - - io-channels + if: + required: + - st,adc-channels + then: + required: + - io-channels + + patternProperties: + "^channel@([0-9]|1[0-9])$": + required: + - io-backends - if: properties: @@ -294,7 +368,77 @@ examples: #address-cells = <1>; #size-cells = <0>; + // Example 1: Audio use case with generic binding 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>; + #address-cells = <1>; + #size-cells = <0>; + st,filter-order = <5>; + + channel@1 { + reg = <1>; + label = "dmic0"; + st,adc-channel-type = "SPI_R"; + st,adc-channel-clk-src = "CLKOUT"; + st,adc-alt-channel; + }; + + asoc_pdm0: dfsdm-dai { + compatible = "st,stm32h7-dfsdm-dai"; + #sound-dai-cells = <0>; + io-channels = <&dfsdm0 0>; + }; + }; + + // Example 1: Analog use case with generic binding + dfsdm1: 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"; + st,filter-order = <1>; + #io-channel-cells = <1>; + #address-cells = <1>; + #size-cells = <0>; + + channel@2 { + reg = <2>; + label = "in2"; + st,adc-channel-type = "SPI_F"; + st,adc-channel-clk-src = "CLKOUT"; + st,adc-alt-channel; + io-backends = <&sd_adc2>; + }; + + channel@3 { + reg = <3>; + label = "in3"; + st,adc-channel-type = "SPI_R"; + st,adc-channel-clk-src = "CLKOUT"; + io-backends = <&sd_adc3>; + }; + }; + }; + + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/stm32mp1-clks.h> + dfsdm_2: 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>; + + // Example 3: Audio use case with legacy binding + dfsdm0_2: filter@0 { compatible = "st,stm32-dfsdm-dmic"; reg = <0>; interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>; @@ -307,14 +451,15 @@ examples: st,adc-channel-clk-src = "CLKOUT"; st,filter-order = <5>; - asoc_pdm0: dfsdm-dai { + asoc_pdm0_2: dfsdm-dai { compatible = "st,stm32h7-dfsdm-dai"; #sound-dai-cells = <0>; io-channels = <&dfsdm0 0>; }; }; - dfsdm_pdm1: filter@1 { + // Example 3: Analog use case with legacy binding + dfsdm1_2: filter@1 { compatible = "st,stm32-dfsdm-adc"; reg = <1>; interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
Change the DFSDM binding to use the new IIO backend framework, along with the adoption of IIO generic channels. This binding change allows to add scaling support to the DFSDM. Keep the legacy binding as deprecated for backward compatibility. The io-backends property is supported only in generic IIO channel binding. - Channel description with the generic binding (Audio and Analog): Properties superseded by generic properties: st,adc-channels: becomes "reg" property in channel node st,adc-channel-names: becomes "label" property in channel node Properties moved to channel child node: st,adc-channel-types: becomes st,adc-channel-type st,adc-channel-clk-src, st,adc-alt-channel - Analog binding: DFSDM filter channel is configured as an IIO backend consumer. Add io-backends property in channel child nodes. DFSDM is no more configured as a channel consumer from SD modulator. Use of io-channels in DFSDM node is deprecated. - Audio binding: DFSDM audio DAI is configured as a channel consumer from DFSDM filter. No change compare to legacy. Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> --- .../bindings/iio/adc/st,stm32-dfsdm-adc.yaml | 157 +++++++++++++++++- 1 file changed, 151 insertions(+), 6 deletions(-)