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Message-ID: <20240714133000.5866-5-kimseer.paller@analog.com>
Date: Sun, 14 Jul 2024 21:29:58 +0800
From: Kim Seer Paller <kimseer.paller@...log.com>
To: <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>
CC: Jonathan Cameron <jic23@...nel.org>,
David Lechner
<dlechner@...libre.com>,
Lars-Peter Clausen <lars@...afoo.de>,
Liam Girdwood
<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
Dimitri Fedrau
<dima.fedrau@...il.com>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Rob
Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
Michael
Hennerich <michael.hennerich@...log.com>,
Nuno Sá
<noname.nuno@...il.com>,
Kim Seer Paller <kimseer.paller@...log.com>
Subject: [PATCH v7 4/6] dt-bindings: iio: dac: Add adi,ltc2664.yaml
Add documentation for ltc2664.
Co-developed-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Kim Seer Paller <kimseer.paller@...log.com>
---
.../bindings/iio/dac/adi,ltc2664.yaml | 181 ++++++++++++++++++
MAINTAINERS | 8 +
2 files changed, 189 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml
diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml
new file mode 100644
index 000000000000..84488437b788
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml
@@ -0,0 +1,181 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ltc2664.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices LTC2664 DAC
+
+maintainers:
+ - Michael Hennerich <michael.hennerich@...log.com>
+ - Kim Seer Paller <kimseer.paller@...log.com>
+
+description: |
+ Analog Devices LTC2664 4 channel, 12-/16-Bit, +-10V DAC
+ https://www.analog.com/media/en/technical-documentation/data-sheets/2664fa.pdf
+
+properties:
+ compatible:
+ enum:
+ - adi,ltc2664
+
+ reg:
+ maxItems: 1
+
+ spi-max-frequency:
+ maximum: 50000000
+
+ vcc-supply:
+ description: Analog Supply Voltage Input.
+
+ v-pos-supply:
+ description: Positive Supply Voltage Input.
+
+ v-neg-supply:
+ description: Negative Supply Voltage Input.
+
+ iovcc-supply:
+ description: Digital Input/Output Supply Voltage.
+
+ ref-supply:
+ description:
+ Reference Input/Output. The voltage at the REF pin sets the full-scale
+ range of all channels. If not provided the internal reference is used and
+ also provided on the VREF pin.
+
+ reset-gpios:
+ description:
+ Active-low Asynchronous Clear Input. A logic low at this level-triggered
+ input clears the part to the reset code and range determined by the
+ hardwired option chosen using the MSPAN pins. The control registers are
+ cleared to zero.
+ maxItems: 1
+
+ adi,manual-span-operation-config:
+ description:
+ This property must mimic the MSPAN pin configurations. By tying the MSPAN
+ pins (MSP2, MSP1 and MSP0) to GND and/or VCC, any output range can be
+ hardware-configured with different mid-scale or zero-scale reset options.
+ The hardware configuration is latched during power on reset for proper
+ operation.
+ 0 - MPS2=GND, MPS1=GND, MSP0=GND (+-10V, reset to 0V)
+ 1 - MPS2=GND, MPS1=GND, MSP0=VCC (+-5V, reset to 0V)
+ 2 - MPS2=GND, MPS1=VCC, MSP0=GND (+-2.5V, reset to 0V)
+ 3 - MPS2=GND, MPS1=VCC, MSP0=VCC (0V to 10, reset to 0V)
+ 4 - MPS2=VCC, MPS1=GND, MSP0=GND (0V to 10V, reset to 5V)
+ 5 - MPS2=VCC, MPS1=GND, MSP0=VCC (0V to 5V, reset to 0V)
+ 6 - MPS2=VCC, MPS1=VCC, MSP0=GND (0V to 5V, reset to 2.5V)
+ 7 - MPS2=VCC, MPS1=VCC, MSP0=VCC (0V to 5V, reset to 0V, enables SoftSpan)
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3, 4, 5, 6, 7]
+ default: 7
+
+ io-channels:
+ description:
+ ADC channel to monitor voltages and temperature at the MUXOUT pin.
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+patternProperties:
+ "^channel@[0-3]$":
+ $ref: dac.yaml
+ type: object
+ additionalProperties: false
+
+ properties:
+ reg:
+ description: The channel number representing the DAC output channel.
+ maximum: 3
+
+ adi,toggle-mode:
+ description:
+ Set the channel as a toggle enabled channel. Toggle operation enables
+ fast switching of a DAC output between two different DAC codes without
+ any SPI transaction.
+ type: boolean
+
+ output-range-microvolt:
+ description:
+ This property is only allowed when SoftSpan is enabled. If not present,
+ [0, 5000000] is the default output range.
+ oneOf:
+ - items:
+ - const: 0
+ - enum: [5000000, 10000000]
+ - items:
+ - const: -5000000
+ - const: 5000000
+ - items:
+ - const: -10000000
+ - const: 10000000
+ - items:
+ - const: -2500000
+ - const: 2500000
+
+ required:
+ - reg
+
+ allOf:
+ - if:
+ not:
+ properties:
+ adi,manual-span-operation-config:
+ const: 7
+ then:
+ patternProperties:
+ "^channel@[0-3]$":
+ properties:
+ output-range-microvolt: false
+
+required:
+ - compatible
+ - reg
+ - spi-max-frequency
+ - vcc-supply
+ - iovcc-supply
+ - v-pos-supply
+ - v-neg-supply
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+additionalProperties: false
+
+examples:
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ dac@0 {
+ compatible = "adi,ltc2664";
+ reg = <0>;
+ spi-max-frequency = <10000000>;
+
+ vcc-supply = <&vcc>;
+ iovcc-supply = <&vcc>;
+ ref-supply = <&vref>;
+ v-pos-supply = <&vpos>;
+ v-neg-supply = <&vneg>;
+
+ io-channels = <&adc 0>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ channel@0 {
+ reg = <0>;
+ adi,toggle-mode;
+ output-range-microvolt = <(-10000000) 10000000>;
+ };
+
+ channel@1 {
+ reg = <1>;
+ output-range-microvolt= <0 10000000>;
+ };
+ };
+ };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 06ecfa64a39a..c25863321328 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13080,6 +13080,14 @@ S: Maintained
F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
F: drivers/iio/dac/ltc1660.c
+LTC2664 IIO DAC DRIVER
+M: Michael Hennerich <michael.hennerich@...log.com>
+M: Kim Seer Paller <kimseer.paller@...log.com>
+L: linux-iio@...r.kernel.org
+S: Supported
+W: https://ez.analog.com/linux-software-drivers
+F: Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml
+
LTC2688 IIO DAC DRIVER
M: Nuno Sá <nuno.sa@...log.com>
L: linux-iio@...r.kernel.org
--
2.34.1
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