From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Wahren <stefan.wahren@i2se.com>
Subject: [PATCH RFC 1/3] dt-bindings: nvmem: add binding for Raspberry Pi OTP
Date: Fri,  9 Mar 2018 14:32:06 +0100
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To: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Eric Anholt <eric@anholt.net>, Phil Elwell <phil@raspberrypi.org>
Cc: Stefan Wahren <stefan.wahren@i2se.com>, devicetree@vger.kernel.org, Florian Fainelli <f.fainelli@gmail.com>, Scott Branden <sbranden@broadcom.com>, Ray Jui <rjui@broadcom.com>, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org
List-Id: devicetree@vger.kernel.org

This patch adds the devicetree binding for Raspberry Pi customer OTP
driver.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
 .../nvmem/raspberrypi,bcm2835-customer-otp.txt     | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/raspberrypi,bcm2835-customer-otp.txt

diff --git a/Documentation/devicetree/bindings/nvmem/raspberrypi,bcm2835-customer-otp.txt b/Documentation/devicetree/bindings/nvmem/raspberrypi,bcm2835-customer-otp.txt
new file mode 100644
index 0000000..3f57744
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/raspberrypi,bcm2835-customer-otp.txt
@@ -0,0 +1,27 @@
+Customer OTP Memory for Raspberry Pi
+
+The VC4 firmware exposes a mailbox interface that allows the ARM core
+to access the customer part of the OTP memory.
+
+The OTP node must be a child node of the Raspberry Pi firmware node.
+
+Required properties :
+- compatible     : Should be "raspberrypi,bcm2835-customer-otp"
+- #address-cells : Should be 1
+- #size-cells    : Should be 1
+
+See nvmem.txt for more information.
+
+Example:
+
+firmware: firmware-rpi {
+	compatible = "raspberrypi,bcm2835-firmware";
+	mboxes = <&mailbox>;
+
+	customer_otp: otp {
+		compatible = "raspberrypi,bcm2835-customer-otp";
+		firmware = <&firmware>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+	};
+};
-- 
2.7.4