linux-kernel - [PATCH v2 1/2] dt-bindings: devantech-srf04.yaml: add pm feature

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Date:   Thu, 9 Jan 2020 09:38:16 +0100
From:   Andreas Klinger <ak@...klinger.de>
To:     jic23@...nel.org, robh+dt@...nel.org, mark.rutland@....com
Cc:     knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        rpi-receiver@...-steyr.ac.at, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] dt-bindings: devantech-srf04.yaml: add pm feature

Add GPIO line and startup time for usage of power management

Signed-off-by: Andreas Klinger <ak@...klinger.de>
---
 .../iio/proximity/devantech-srf04.yaml         | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml
index 4e80ea7c1475..8afbac24c34e 100644
--- a/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml
+++ b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml
@@ -51,6 +51,24 @@ properties:
       the time between two interrupts is measured in the driver.
     maxItems: 1
 
+  power-gpios:
+    description:
+      Definition of the GPIO for power management of connected peripheral
+      (output).
+      This GPIO can be used by the external hardware for power management.
+      When the device gets suspended it's switched off and when it resumes
+      it's switched on again. After some period of inactivity the driver
+      get suspended automatically (autosuspend feature).
+    maxItems: 1
+
+  startup-time-ms:
+    description:
+      This is the startup time the device needs after a resume to be up and
+      running.
+    minimum: 0
+    maximum: 1000
+    default: 100
+
 required:
   - compatible
   - trig-gpios
-- 
2.20.1