summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/gpio/maxim,max31910.yaml
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/maxim,max31910.yaml')
-rw-r--r--Documentation/devicetree/bindings/gpio/maxim,max31910.yaml104
1 files changed, 104 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/maxim,max31910.yaml b/Documentation/devicetree/bindings/gpio/maxim,max31910.yaml
new file mode 100644
index 000000000000..82a190a715f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/maxim,max31910.yaml
@@ -0,0 +1,104 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/maxim,max31910.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX3191x GPIO serializer
+
+maintainers:
+ - Lukas Wunner <lukas@wunner.de>
+
+properties:
+ compatible:
+ enum:
+ - maxim,max31910
+ - maxim,max31911
+ - maxim,max31912
+ - maxim,max31913
+ - maxim,max31953
+ - maxim,max31963
+
+ reg:
+ maxItems: 1
+
+ gpio-controller: true
+
+ '#gpio-cells':
+ const: 2
+
+ '#daisy-chained-devices':
+ description: Number of chips in the daisy-chain.
+ default: 1
+
+ maxim,modesel-gpios:
+ description:
+ GPIO pins to configure modesel of each chip. The number of GPIOs must
+ equal "#daisy-chained-devices" (if each chip is driven by a separate pin)
+ or 1 (if all chips are wired to the same pin).
+
+ maxim,fault-gpios:
+ description:
+ GPIO pins to read fault of each chip. The number of GPIOs must equal
+ "#daisy-chained-devices" or 1.
+
+ maxim,db0-gpios:
+ description:
+ GPIO pins to configure debounce of each chip. The number of GPIOs must
+ equal "#daisy-chained-devices" or 1.
+
+ maxim,db1-gpios:
+ description:
+ GPIO pins to configure debounce of each chip. The number of GPIOs must
+ equal "maxim,db0-gpios".
+
+ maxim,modesel-8bit:
+ description:
+ Boolean whether the modesel pin of the chips is pulled high (8-bit mode).
+ Use this if the modesel pin is hardwired and consequently
+ "maxim,modesel-gpios" cannot be specified. By default if neither this nor
+ "maxim,modesel-gpios" is given, the driver assumes that modesel is pulled
+ low (16-bit mode).
+ type: boolean
+
+ maxim,ignore-undervoltage:
+ description:
+ Boolean whether to ignore undervoltage alarms signaled by the
+ "maxim,fault-gpios" or by the status byte (in 16-bit mode). Use this if
+ the chips are powered through 5VOUT instead of VCC24V, in which case they
+ will constantly signal undervoltage.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - gpio-controller
+ - '#gpio-cells'
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpio@0 {
+ compatible = "maxim,max31913";
+ reg = <0>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ maxim,modesel-gpios = <&gpio2 23>;
+ maxim,fault-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
+ maxim,db0-gpios = <&gpio2 25>;
+ maxim,db1-gpios = <&gpio2 26>;
+
+ spi-max-frequency = <25000000>;
+ };
+ };