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Date:   Fri, 12 Apr 2019 15:18:49 +0800
From:   Pi-Hsun Shih <>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Pi-Hsun Shih <>, Rob Herring <>,
        Lee Jones <>,
        Rob Herring <>,
        Mark Rutland <>,
        Benson Leung <>,
        Enric Balletbo i Serra <>,
        Guenter Roeck <>, (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), (open list)
Subject: [PATCH v8 5/7] dt-bindings: Add binding for cros-ec-rpmsg.

Add a DT binding documentation for ChromeOS EC driver over rpmsg.

Signed-off-by: Pi-Hsun Shih <>
Acked-by: Rob Herring <>
Changes from v7:
 - No change.

Changes from v6:
 - No change.

Changes from v5:
 - New patch.
 Documentation/devicetree/bindings/mfd/cros-ec.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mfd/cros-ec.txt b/Documentation/devicetree/bindings/mfd/cros-ec.txt
index 6245c9b1a68b..4860eabd0f72 100644
--- a/Documentation/devicetree/bindings/mfd/cros-ec.txt
+++ b/Documentation/devicetree/bindings/mfd/cros-ec.txt
@@ -3,7 +3,7 @@ ChromeOS Embedded Controller
 Google's ChromeOS EC is a Cortex-M device which talks to the AP and
 implements various function such as keyboard and battery charging.
-The EC can be connect through various means (I2C, SPI, LPC) and the
+The EC can be connect through various means (I2C, SPI, LPC, RPMSG) and the
 compatible string used depends on the interface. Each connection method has
 its own driver which connects to the top level interface-agnostic EC driver.
 Other Linux driver (such as cros-ec-keyb for the matrix keyboard) connect to
@@ -17,6 +17,9 @@ Required properties (SPI):
 - compatible: "google,cros-ec-spi"
 - reg: SPI chip select
+Required properties (RPMSG):
+- compatible: "google,cros-ec-rpmsg"
 Optional properties (SPI):
 - google,cros-ec-spi-pre-delay: Some implementations of the EC need a little
   time to wake up from sleep before they can receive SPI transfers at a high

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