diff options
| author | Mark Brown <broonie@kernel.org> | 2024-06-23 13:12:24 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-06-23 13:12:24 +0100 |
| commit | b493c97d088afa61245aa06a02f0b87369806062 (patch) | |
| tree | f29ae3823af93a17c2dc2edac8c04521231a743a /Documentation | |
| parent | f6272b59e8b86efb1c18ea1d467471b1dd974561 (diff) | |
| parent | 6c01001414ce477311d872c40e23dfec4866d608 (diff) | |
tlv320adc3xxx: Allow MICBIAS pins to be used as
Merge series from Ricard Wanderlof <ricard.wanderlof@axis.com>:
In some cases, depending on system design, the MICBIAS pins on the
chip are not needed as such, but a couple of extra GPIO pins would be
useful. This patch allows the MICBIAS pins to be configured in the
device tree as general purpose output pins, controlled via the GPIO
framework.
Owing to their originally intended purpose there are some limitations:
when the MICBIAS pins are deactivated, they will float, so will likely
need a pulldown in many applications. When activated, they will
assume the voltage specified by the micbias1-vg and micbias2-vg
properties, respectively, meaning that the resulting output voltage
will be 2.0 V, 2.5 V or AVDD .
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml b/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml index 8ac741f4cd56..66b76656229f 100644 --- a/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml +++ b/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml @@ -82,6 +82,26 @@ properties: Note that there is currently no support for reading the GPIO pins as inputs. + ti,micbias1-gpo: + type: boolean + description: | + When set, the MICBIAS1 pin may be controlled via the GPIO framework, + as pin number 3 on the device. + + In this mode, when the pin is activated, it will be set to the voltage + specified by the ti,micbias1-vg property. When deactivated, the pin will + float. + + ti,micbias2-gpo: + type: boolean + description: | + When set, the MICBIAS2 pin may be controlled via the GPIO framework, + as pin number 4 on the device. + + In this mode, when the pin is activated, it will be set to the voltage + specified by the ti,micbias2-vg property. When deactivated, the pin will + float. + ti,micbias1-vg: $ref: /schemas/types.yaml#/definitions/uint32 enum: @@ -104,6 +124,10 @@ properties: description: | Mic bias voltage output on MICBIAS2 pin +dependencies: + ti,micbias1-gpo: ['ti,micbias1-vg'] + ti,micbias2-gpo: ['ti,micbias2-vg'] + required: - compatible - reg |