| Message ID | 20231005134541.947727-1-naresh.solanki@9elements.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v4,1/2] dt-bindings: i2c: pca954x: Add custom properties for MAX7357 | expand |
On Thu, 05 Oct 2023 15:45:39 +0200, Naresh Solanki wrote: > From: Patrick Rudolph <patrick.rudolph@9elements.com> > > Maxim Max7357 has a configuration register to enable additional > features. These features aren't enabled by default & its up to > board designer to enable the same as it may have unexpected side effects. > > These should be validated for proper functioning & detection of devices > in secondary bus as sometimes it can cause secondary bus being disabled. > > Add booleans for: > - maxim,isolate-stuck-channel > - maxim,send-flush-out-sequence > - maxim,preconnection-wiggle-test-enable > > Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> > Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com> > --- > Changes in V4: > - Drop max7358. > Changes in V3: > - Update commit message > Changes in V2: > - Update properties. > --- > .../bindings/i2c/i2c-mux-pca954x.yaml | 30 +++++++++++++++++++ > 1 file changed, 30 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml index 2d7bb998b0e9..9aa0585200c9 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml +++ b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml @@ -71,6 +71,23 @@ properties: description: A voltage regulator supplying power to the chip. On PCA9846 the regulator supplies power to VDD2 (core logic) and optionally to VDD1. + maxim,isolate-stuck-channel: + type: boolean + description: Allows to use non faulty channels while a stuck channel is + isolated from the upstream bus. If not set all channels are isolated from + the upstream bus until the fault is cleared. + + maxim,send-flush-out-sequence: + type: boolean + description: Send a flush-out sequence to stuck auxiliary buses + automatically after a stuck channel is being detected. + + maxim,preconnection-wiggle-test-enable: + type: boolean + description: Send a STOP condition to the auxiliary buses when the switch + register activates a channel to detect a stuck high fault. On fault the + channel is isolated from the upstream bus. + required: - compatible - reg @@ -95,6 +112,19 @@ allOf: "#interrupt-cells": false interrupt-controller: false + - if: + not: + properties: + compatible: + contains: + enum: + - maxim,max7357 + then: + properties: + maxim,isolate-stuck-channel: false + maxim,send-flush-out-sequence: false + maxim,preconnection-wiggle-test-enable: false + unevaluatedProperties: false examples: