[PATCH 1/2] dt-bindings: iio: dac: add support for Microchip MCP48FEB02 to MCP47FEB02
From: Ariana Lazar
Date: Fri Apr 03 2026 - 06:51:18 EST
This is the device tree schema for iio driver for Microchip
MCP48FxBy1/2/4/8 series of buffered voltage output Digital-to-Analog
Converters with nonvolatile or volatile memory on top of MCP47FEB02.
The families support up to 8 output channels and have 8-bit, 10-bit or
12-bit resolution.
The I2C (MCP47F(E/V)BXX) and SPI (MCP48F(E/V)BXX) DAC families were merged
into the same dt-binding file.
Fixes: 4ba12d304175 ("dt-bindings: iio: dac: adding support for Microchip MCP47FEB02")
Signed-off-by: Ariana Lazar <ariana.lazar@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20260216-shiny-itunes-00a31d1f4db7@spud/
---
.../bindings/iio/dac/microchip,mcp47feb02.yaml | 291 +++++++++++++++------
MAINTAINERS | 1 -
2 files changed, 217 insertions(+), 75 deletions(-)
diff --git a/Documentation/devicetree/bindings/iio/dac/microchip,mcp47feb02.yaml b/Documentation/devicetree/bindings/iio/dac/microchip,mcp47feb02.yaml
index d2466aa6bda2106a8b695347a0edf38462294d03..544755cb6334c311f38d156dcf4b4e6170c6e62d 100644
--- a/Documentation/devicetree/bindings/iio/dac/microchip,mcp47feb02.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/microchip,mcp47feb02.yaml
@@ -4,90 +4,151 @@
$id: http://devicetree.org/schemas/iio/dac/microchip,mcp47feb02.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
-title: Microchip MCP47F(E/V)B(0/1/2)(1/2/4/8) DAC with I2C Interface Families
+title: Microchip MCP4(7/8)F(E/V)B(0/1/2)(1/2/4/8) DAC with I2C/SPI Interface Families
maintainers:
- Ariana Lazar <ariana.lazar@xxxxxxxxxxxxx>
description: |
- Datasheet for MCP47FEB01, MCP47FEB11, MCP47FEB21, MCP47FEB02, MCP47FEB12,
- MCP47FEB22 can be found here:
- https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005375A.pdf
- Datasheet for MCP47FVB01, MCP47FVB11, MCP47FVB21, MCP47FVB02, MCP47FVB12,
- MCP47FVB22 can be found here:
- https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005405A.pdf
- Datasheet for MCP47FEB04, MCP47FEB14, MCP47FEB24, MCP47FEB08, MCP47FEB18,
- MCP47FEB28, MCP47FVB04, MCP47FVB14, MCP47FVB24, MCP47FVB08, MCP47FVB18,
- MCP47FVB28 can be found here:
- https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP47FXBX48-Data-Sheet-DS200006368A.pdf
-
- +------------+--------------+-------------+-------------+------------+
- | Device | Resolution | Channels | Vref number | Memory |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FEB01 | 8-bit | 1 | 1 | EEPROM |
- | MCP47FEB11 | 10-bit | 1 | 1 | EEPROM |
- | MCP47FEB21 | 12-bit | 1 | 1 | EEPROM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FEB02 | 8-bit | 2 | 1 | EEPROM |
- | MCP47FEB12 | 10-bit | 2 | 1 | EEPROM |
- | MCP47FEB22 | 12-bit | 2 | 1 | EEPROM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FVB01 | 8-bit | 1 | 1 | RAM |
- | MCP47FVB11 | 10-bit | 1 | 1 | RAM |
- | MCP47FVB21 | 12-bit | 1 | 1 | RAM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FVB02 | 8-bit | 2 | 1 | RAM |
- | MCP47FVB12 | 10-bit | 2 | 1 | RAM |
- | MCP47FVB22 | 12-bit | 2 | 1 | RAM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FVB04 | 8-bit | 4 | 2 | RAM |
- | MCP47FVB14 | 10-bit | 4 | 2 | RAM |
- | MCP47FVB24 | 12-bit | 4 | 2 | RAM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FVB08 | 8-bit | 8 | 2 | RAM |
- | MCP47FVB18 | 10-bit | 8 | 2 | RAM |
- | MCP47FVB28 | 12-bit | 8 | 2 | RAM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FEB04 | 8-bit | 4 | 2 | EEPROM |
- | MCP47FEB14 | 10-bit | 4 | 2 | EEPROM |
- | MCP47FEB24 | 12-bit | 4 | 2 | EEPROM |
- |------------|--------------|-------------|-------------|------------|
- | MCP47FEB08 | 8-bit | 8 | 2 | EEPROM |
- | MCP47FEB18 | 10-bit | 8 | 2 | EEPROM |
- | MCP47FEB28 | 12-bit | 8 | 2 | EEPROM |
- +------------+--------------+-------------+-------------+------------+
+ Datasheets for MCP47F(E/V)B(0/1/2)(1/2/4/8) DAC with I2C Interface Families:
+ Datasheet for MCP47FEB01, MCP47FEB11, MCP47FEB21, MCP47FEB02, MCP47FEB12,
+ MCP47FEB22 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005375A.pdf
+ Datasheet for MCP47FVB01, MCP47FVB11, MCP47FVB21, MCP47FVB02, MCP47FVB12,
+ MCP47FVB22 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005405A.pdf
+ Datasheet for MCP47FEB04, MCP47FEB14, MCP47FEB24, MCP47FEB08, MCP47FEB18,
+ MCP47FEB28, MCP47FVB04, MCP47FVB14, MCP47FVB24, MCP47FVB08, MCP47FVB18,
+ MCP47FVB28 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP47FXBX48-Data-Sheet-DS200006368A.pdf
+ Datasheets for MCP48F(E/V)B(0/1/2)(1/2/4/8) DAC with SPI Interface Families:
+ Datasheet for MCP48FEB01, MCP48FEB02, MCP48FEB11, MCP48FEB12, MCP48FEB21,
+ MCP48FEB22 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005429B.pdf
+ Datasheet for MCP48FVB01, MCP48FVB02, MCP48FVB11, MCP48FVB12, MCP48FVB21,
+ MCP48FVB22 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005466A.pdf
+ Datasheet for MCP48FEB04, MCP48FEB14, MCP48FEB24, MCP48FEB08, MCP48FEB18,
+ MCP48FEB28, MCP48FVB04, MCP48FVB14, MCP48FVB24, MCP48FVB08, MCP48FVB18,
+ MCP48FVB28 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP48FXBX4-8-Family-Data-Sheet-DS20006362A.pdf
+
+ +------------+--------------+-------------+-------------+------------+------------+
+ | Device | Resolution | Channels | Vref number | Memory | Interface |
+ |------------|--------------|-------------|-------------|------------|------------|
+ | MCP47FEB01 | | 1 | 1 | EEPROM | I2C |
+ | MCP47FEB02 | | 2 | 1 | EEPROM | I2C |
+ | MCP47FEB04 | | 4 | 2 | EEPROM | I2C |
+ | MCP47FEB08 | 8-bit | 8 | 2 | EEPROM | I2C |
+ | MCP48FEB01 | | 1 | 1 | EEPROM | SPI |
+ | MCP48FEB02 | | 2 | 1 | EEPROM | SPI |
+ | MCP48FEB04 | | 4 | 2 | EEPROM | SPI |
+ | MCP48FEB08 | | 8 | 2 | EEPROM | SPI |
+ |------------|--------------|-------------|-------------|------------|------------|
+ | MCP47FEB11 | | 1 | 1 | EEPROM | I2C |
+ | MCP47FEB12 | | 2 | 1 | EEPROM | I2C |
+ | MCP47FEB14 | | 4 | 2 | EEPROM | I2C |
+ | MCP47FEB18 | 10-bit | 8 | 2 | EEPROM | I2C |
+ | MCP48FEB11 | | 1 | 1 | EEPROM | SPI |
+ | MCP48FEB12 | | 2 | 1 | EEPROM | SPI |
+ | MCP48FEB14 | | 4 | 2 | EEPROM | SPI |
+ | MCP48FEB18 | | 8 | 2 | EEPROM | SPI |
+ |------------|--------------|-------------|-------------|------------|------------|
+ | MCP47FEB21 | | 1 | 1 | EEPROM | I2C |
+ | MCP47FEB22 | | 2 | 1 | EEPROM | I2C |
+ | MCP47FEB24 | | 4 | 2 | EEPROM | I2C |
+ | MCP47FEB28 | 12-bit | 8 | 2 | EEPROM | I2C |
+ | MCP48FEB21 | | 1 | 1 | EEPROM | SPI |
+ | MCP48FEB22 | | 2 | 1 | EEPROM | SPI |
+ | MCP48FEB24 | | 4 | 2 | EEPROM | SPI |
+ | MCP48FEB28 | | 8 | 2 | EEPROM | SPI |
+ |------------|--------------|-------------|-------------|------------|------------|
+ | MCP47FVB01 | | 1 | 1 | RAM | I2C |
+ | MCP47FVB02 | | 2 | 1 | RAM | I2C |
+ | MCP47FVB04 | | 4 | 2 | RAM | I2C |
+ | MCP47FVB08 | 8-bit | 8 | 2 | RAM | I2C |
+ | MCP48FVB01 | | 1 | 1 | RAM | SPI |
+ | MCP48FVB02 | | 2 | 1 | RAM | SPI |
+ | MCP48FVB04 | | 4 | 2 | RAM | SPI |
+ | MCP48FVB08 | | 8 | 2 | RAM | SPI |
+ |------------|--------------|-------------|-------------|------------|------------|
+ | MCP47FVB11 | | 1 | 1 | RAM | I2C |
+ | MCP47FVB12 | | 2 | 1 | RAM | I2C |
+ | MCP47FVB14 | | 4 | 2 | RAM | I2C |
+ | MCP47FVB18 | 10-bit | 8 | 2 | RAM | I2C |
+ | MCP48FVB11 | | 1 | 1 | RAM | SPI |
+ | MCP48FVB12 | | 2 | 1 | RAM | SPI |
+ | MCP48FVB14 | | 4 | 2 | RAM | SPI |
+ | MCP48FVB18 | | 8 | 2 | RAM | SPI |
+ |------------|--------------|-------------|-------------|------------|------------|
+ | MCP47FVB21 | | 1 | 1 | RAM | I2C |
+ | MCP47FVB22 | | 2 | 1 | RAM | I2C |
+ | MCP47FVB24 | | 4 | 2 | RAM | I2C |
+ | MCP47FVB28 | 12-bit | 8 | 2 | RAM | I2C |
+ | MCP48FVB21 | | 1 | 1 | RAM | SPI |
+ | MCP48FVB22 | | 2 | 1 | RAM | SPI |
+ | MCP48FVB24 | | 4 | 2 | RAM | SPI |
+ | MCP48FVB28 | | 8 | 2 | RAM | SPI |
+ +------------+--------------+-------------+-------------+------------+------------+
properties:
compatible:
enum:
- microchip,mcp47feb01
- - microchip,mcp47feb11
- - microchip,mcp47feb21
- microchip,mcp47feb02
+ - microchip,mcp47feb04
+ - microchip,mcp47feb08
+ - microchip,mcp47feb11
- microchip,mcp47feb12
+ - microchip,mcp47feb14
+ - microchip,mcp47feb18
+ - microchip,mcp47feb21
- microchip,mcp47feb22
+ - microchip,mcp47feb24
+ - microchip,mcp47feb28
- microchip,mcp47fvb01
- - microchip,mcp47fvb11
- - microchip,mcp47fvb21
- microchip,mcp47fvb02
- - microchip,mcp47fvb12
- - microchip,mcp47fvb22
- microchip,mcp47fvb04
- - microchip,mcp47fvb14
- - microchip,mcp47fvb24
- microchip,mcp47fvb08
+ - microchip,mcp47fvb11
+ - microchip,mcp47fvb12
+ - microchip,mcp47fvb14
- microchip,mcp47fvb18
+ - microchip,mcp47fvb21
+ - microchip,mcp47fvb22
+ - microchip,mcp47fvb24
- microchip,mcp47fvb28
- - microchip,mcp47feb04
- - microchip,mcp47feb14
- - microchip,mcp47feb24
- - microchip,mcp47feb08
- - microchip,mcp47feb18
- - microchip,mcp47feb28
+ - microchip,mcp48feb01
+ - microchip,mcp48feb02
+ - microchip,mcp48feb04
+ - microchip,mcp48feb08
+ - microchip,mcp48feb11
+ - microchip,mcp48feb12
+ - microchip,mcp48feb14
+ - microchip,mcp48feb18
+ - microchip,mcp48feb21
+ - microchip,mcp48feb22
+ - microchip,mcp48feb24
+ - microchip,mcp48feb28
+ - microchip,mcp48fvb01
+ - microchip,mcp48fvb02
+ - microchip,mcp48fvb04
+ - microchip,mcp48fvb08
+ - microchip,mcp48fvb11
+ - microchip,mcp48fvb12
+ - microchip,mcp48fvb14
+ - microchip,mcp48fvb18
+ - microchip,mcp48fvb21
+ - microchip,mcp48fvb22
+ - microchip,mcp48fvb24
+ - microchip,mcp48fvb28
reg:
maxItems: 1
+ spi-max-frequency:
+ maximum: 10000000
+
"#address-cells":
const: 1
@@ -111,7 +172,7 @@ properties:
- for single-channel device: Vout0;
- for dual-channel device: Vout0, Vout1;
- for quad-channel device: Vout0, Vout2;
- - for octal-channel device: Vout0, Vout2, Vout6, Vout8;
+ - for octal-channel device: Vout0, Vout2, Vout4, Vout6;
vref1-supply:
description: |
@@ -141,7 +202,7 @@ properties:
description:
Enable buffering of the external Vref/Vref0 pin in cases where the
external reference voltage does not have sufficient current capability in
- order not to drop it’s voltage when connected to the internal resistor
+ order not to drop its voltage when connected to the internal resistor
ladder circuit.
microchip,vref1-buffered:
@@ -149,7 +210,7 @@ properties:
description:
Enable buffering of the external Vref1 pin in cases where the external
reference voltage does not have sufficient current capability in order not
- to drop it’s voltage when connected to the internal resistor ladder
+ to drop its voltage when connected to the internal resistor ladder
circuit.
patternProperties:
@@ -161,8 +222,7 @@ patternProperties:
properties:
reg:
description: The channel number.
- minItems: 1
- maxItems: 8
+ maxItems: 1
label:
description: Unique name to identify which channel this is.
@@ -178,6 +238,13 @@ required:
- vdd-supply
allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ pattern: "mcp48"
+ then:
+ $ref: /schemas/spi/spi-peripheral-props.yaml#
- if:
properties:
compatible:
@@ -189,6 +256,12 @@ allOf:
- microchip,mcp47fvb01
- microchip,mcp47fvb11
- microchip,mcp47fvb21
+ - microchip,mcp48feb01
+ - microchip,mcp48feb11
+ - microchip,mcp48feb21
+ - microchip,mcp48fvb01
+ - microchip,mcp48fvb11
+ - microchip,mcp48fvb21
then:
properties:
lat1-gpios: false
@@ -211,6 +284,12 @@ allOf:
- microchip,mcp47fvb02
- microchip,mcp47fvb12
- microchip,mcp47fvb22
+ - microchip,mcp48feb02
+ - microchip,mcp48feb12
+ - microchip,mcp48feb22
+ - microchip,mcp48fvb02
+ - microchip,mcp48fvb12
+ - microchip,mcp48fvb22
then:
properties:
lat1-gpios: false
@@ -227,12 +306,18 @@ allOf:
compatible:
contains:
enum:
- - microchip,mcp47fvb04
- - microchip,mcp47fvb14
- - microchip,mcp47fvb24
- microchip,mcp47feb04
- microchip,mcp47feb14
- microchip,mcp47feb24
+ - microchip,mcp47fvb04
+ - microchip,mcp47fvb14
+ - microchip,mcp47fvb24
+ - microchip,mcp48feb04
+ - microchip,mcp48feb14
+ - microchip,mcp48feb24
+ - microchip,mcp48fvb04
+ - microchip,mcp48fvb14
+ - microchip,mcp48fvb24
then:
patternProperties:
"^channel@[0-3]$":
@@ -245,12 +330,12 @@ allOf:
compatible:
contains:
enum:
- - microchip,mcp47fvb08
- - microchip,mcp47fvb18
- - microchip,mcp47fvb28
- microchip,mcp47feb08
- microchip,mcp47feb18
- microchip,mcp47feb28
+ - microchip,mcp48fvb08
+ - microchip,mcp48fvb18
+ - microchip,mcp48fvb28
then:
patternProperties:
"^channel@[0-7]$":
@@ -272,7 +357,40 @@ allOf:
properties:
microchip,vref1-buffered: false
-additionalProperties: false
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - microchip,mcp47feb01
+ - microchip,mcp47feb02
+ - microchip,mcp47feb04
+ - microchip,mcp47feb08
+ - microchip,mcp47feb11
+ - microchip,mcp47feb12
+ - microchip,mcp47feb14
+ - microchip,mcp47feb18
+ - microchip,mcp47feb21
+ - microchip,mcp47feb22
+ - microchip,mcp47feb24
+ - microchip,mcp47feb28
+ - microchip,mcp47fvb01
+ - microchip,mcp47fvb02
+ - microchip,mcp47fvb04
+ - microchip,mcp47fvb08
+ - microchip,mcp47fvb11
+ - microchip,mcp47fvb12
+ - microchip,mcp47fvb14
+ - microchip,mcp47fvb18
+ - microchip,mcp47fvb21
+ - microchip,mcp47fvb22
+ - microchip,mcp47fvb24
+ - microchip,mcp47fvb28
+ then:
+ properties:
+ spi-max-frequency: false
+
+unevaluatedProperties: false
examples:
- |
@@ -280,7 +398,7 @@ examples:
#address-cells = <1>;
#size-cells = <0>;
- dac@0 {
+ dac@60 {
compatible = "microchip,mcp47feb02";
reg = <0>;
vdd-supply = <&vdac_vdd>;
@@ -299,4 +417,29 @@ examples:
};
};
};
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dac@0 {
+ compatible = "microchip,mcp48feb02";
+ reg = <0>;
+ vdd-supply = <&vdac_vdd>;
+ vref-supply = <&vref_reg>;
+ spi-max-frequency = <10000000>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ channel@0 {
+ reg = <0>;
+ label = "Adjustable_voltage_ch0";
+ };
+
+ channel@1 {
+ reg = <0x1>;
+ label = "Adjustable_voltage_ch1";
+ };
+ };
+ };
...
diff --git a/MAINTAINERS b/MAINTAINERS
index d664add6d40891fb4a94dba34c58d401df81d657..5997cf04b0732beaf69ac78cb762c42c56e4fcd6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15850,7 +15850,6 @@ M: Ariana Lazar <ariana.lazar@xxxxxxxxxxxxx>
L: linux-iio@xxxxxxxxxxxxxxx
S: Supported
F: Documentation/devicetree/bindings/iio/dac/microchip,mcp47feb02.yaml
-F: drivers/iio/dac/mcp47feb02.c
MCP4821 DAC DRIVER
M: Anshul Dalal <anshulusr@xxxxxxxxx>
--
2.43.0