Add support for the Analog Devices ADG1712 quad SPST switch to the
existing GPIO multiplexer bindings. The ADG1712 contains four
independent single-pole/single-throw (SPST) switches, each controlled
by a dedicated GPIO pin.
Unlike traditional multiplexers that use GPIOs as binary-encoded
selectors, the ADG1712 treats each GPIO as a direct switch controller.
The mux state represents the combination of all four switches, with
values from 0-15 corresponding to different switch combinations.
For example, state 5 (binary 0101) represents:
- SW1: ON (GPIO0 = 1)
- SW2: OFF (GPIO1 = 0)
- SW3: ON (GPIO2 = 1)
- SW4: OFF (GPIO3 = 0)
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
.../devicetree/bindings/mux/gpio-mux.yaml | 24 ++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/mux/gpio-mux.yaml b/Documentation/devicetree/bindings/mux/gpio-mux.yaml
index ef7e33ec85d4..7c5784875683 100644
--- a/Documentation/devicetree/bindings/mux/gpio-mux.yaml
+++ b/Documentation/devicetree/bindings/mux/gpio-mux.yaml
@@ -17,9 +17,14 @@ description: |+
multiplexer GPIO pins, where the first pin is the least significant
bit. An active pin is a binary 1, an inactive pin is a binary 0.
+ For ADG1712, each GPIO directly controls one independent switch, and
+ the state represents the combination of all four switches (0-15).
+
properties:
compatible:
- const: gpio-mux
+ enum:
+ - gpio-mux
+ - adi,adg1712
mux-gpios:
description:
@@ -100,4 +105,21 @@ examples:
};
};
};
+
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ // ADG1712 quad SPST switch controller
+ adg1712: switch-controller {
+ compatible = "adi,adg1712";
+ #mux-control-cells = <0>;
+
+ mux-gpios = <&gpio 10 GPIO_ACTIVE_HIGH>,
+ <&gpio 11 GPIO_ACTIVE_HIGH>,
+ <&gpio 12 GPIO_ACTIVE_HIGH>,
+ <&gpio 13 GPIO_ACTIVE_HIGH>;
+
+ // Initial state: SW1=ON, SW2=OFF, SW3=ON, SW4=OFF (binary: 0101 = 5)
+ idle-state = <5>;
+ };
...
--
2.43.0On Fri, 21 Nov 2025 11:57:31 +0000, Antoniu Miclaus wrote: > Add support for the Analog Devices ADG1712 quad SPST switch to the > existing GPIO multiplexer bindings. The ADG1712 contains four > independent single-pole/single-throw (SPST) switches, each controlled > by a dedicated GPIO pin. > > Unlike traditional multiplexers that use GPIOs as binary-encoded > selectors, the ADG1712 treats each GPIO as a direct switch controller. > The mux state represents the combination of all four switches, with > values from 0-15 corresponding to different switch combinations. > > For example, state 5 (binary 0101) represents: > - SW1: ON (GPIO0 = 1) > - SW2: OFF (GPIO1 = 0) > - SW3: ON (GPIO2 = 1) > - SW4: OFF (GPIO3 = 0) > > Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> > --- > .../devicetree/bindings/mux/gpio-mux.yaml | 24 ++++++++++++++++++- > 1 file changed, 23 insertions(+), 1 deletion(-) > My bot found errors running 'make dt_binding_check' on your patch: yamllint warnings/errors: dtschema/dtc warnings/errors: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mux/gpio-mux.example.dtb: switch-controller (adi,adg1712): $nodename:0: 'switch-controller' does not match '^mux-controller(@.*|-([0-9]|[1-9][0-9]+))?$' from schema $id: http://devicetree.org/schemas/mux/mux-controller.yaml doc reference errors (make refcheckdocs): See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20251121115750.20119-2-antoniu.miclaus@analog.com The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.
On Fri, Nov 21, 2025 at 07:44:57AM -0600, Rob Herring (Arm) wrote: > > On Fri, 21 Nov 2025 11:57:31 +0000, Antoniu Miclaus wrote: > > Add support for the Analog Devices ADG1712 quad SPST switch to the > > existing GPIO multiplexer bindings. The ADG1712 contains four > > independent single-pole/single-throw (SPST) switches, each controlled > > by a dedicated GPIO pin. > > > > Unlike traditional multiplexers that use GPIOs as binary-encoded > > selectors, the ADG1712 treats each GPIO as a direct switch controller. > > The mux state represents the combination of all four switches, with > > values from 0-15 corresponding to different switch combinations. > > > > For example, state 5 (binary 0101) represents: > > - SW1: ON (GPIO0 = 1) > > - SW2: OFF (GPIO1 = 0) > > - SW3: ON (GPIO2 = 1) > > - SW4: OFF (GPIO3 = 0) > > > > Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> > > --- > > .../devicetree/bindings/mux/gpio-mux.yaml | 24 ++++++++++++++++++- > > 1 file changed, 23 insertions(+), 1 deletion(-) > > > > My bot found errors running 'make dt_binding_check' on your patch: > > yamllint warnings/errors: > > dtschema/dtc warnings/errors: > /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mux/gpio-mux.example.dtb: switch-controller (adi,adg1712): $nodename:0: 'switch-controller' does not match '^mux-controller(@.*|-([0-9]|[1-9][0-9]+))?$' > from schema $id: http://devicetree.org/schemas/mux/mux-controller.yaml There's a patch relaxing this restriction here: https://lore.kernel.org/all/cb7c28ccf3a1b136e793b48720f816de7d5f75b2.1763737324.git.tommaso.merciai.xr@bp.renesas.com/ > > doc reference errors (make refcheckdocs): > > See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20251121115750.20119-2-antoniu.miclaus@analog.com > > The base for the series is generally the latest rc1. A different dependency > should be noted in *this* patch. > > If you already ran 'make dt_binding_check' and didn't see the above > error(s), then make sure 'yamllint' is installed and dt-schema is up to > date: > > pip3 install dtschema --upgrade > > Please check and re-submit after running the above command yourself. Note > that DT_SCHEMA_FILES can be set to your schema file to speed up checking > your schema. However, it must be unset to test all examples with your schema. >
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