linux-kernel - [PATCH v2] bcm2835: Add Broadcom BCM2835 RNG to the device tree

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Date:	Tue, 26 Mar 2013 18:48:10 +0100
From:	Lubomir Rintel <lkundrak@...sk>
To:	linux-kernel@...r.kernel.org
Cc:	Lubomir Rintel <lkundrak@...sk>,
	Stephen Warren <swarren@...dotorg.org>,
	linux-rpi-kernel@...ts.infradead.org
Subject: [PATCH v2] bcm2835: Add Broadcom BCM2835 RNG to the device tree

This adds a device tree binding for random number generator present on Broadcom
BCM2835 SoC, used in Raspberry Pi and Roku 2 devices.

Signed-off-by: Lubomir Rintel <lkundrak@...sk>
Cc: Stephen Warren <swarren@...dotorg.org>
Cc: linux-rpi-kernel@...ts.infradead.org
---
Changes for v2:
    - Split out from the driver changeset
    - Added documentation

 .../devicetree/bindings/rng/brcm,bcm2835.txt       |   13 +++++++++++++
 arch/arm/boot/dts/bcm2835.dtsi                     |    5 +++++
 2 files changed, 18 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/rng/brcm,bcm2835.txt

diff --git a/Documentation/devicetree/bindings/rng/brcm,bcm2835.txt b/Documentation/devicetree/bindings/rng/brcm,bcm2835.txt
new file mode 100644
index 0000000..07ccdaa
--- /dev/null
+++ b/Documentation/devicetree/bindings/rng/brcm,bcm2835.txt
@@ -0,0 +1,13 @@
+BCM2835 Random number generator
+
+Required properties:
+
+- compatible : should be "brcm,bcm2835-rng"
+- reg : Specifies base physical address and size of the registers.
+
+Example:
+
+rng {
+        compatible = "brcm,bcm2835-rng";
+        reg = <0x7e104000 0x10>;
+};
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index 7e0481e..dc22336 100644
--- a/arch/arm/boot/dts/bcm2835.dtsi
+++ b/arch/arm/boot/dts/bcm2835.dtsi
@@ -34,6 +34,11 @@
 			reg = <0x7e100000 0x28>;
 		};
 
+		rng {
+			compatible = "brcm,bcm2835-rng";
+			reg = <0x7e104000 0x10>;
+		};
+
 		uart@...01000 {
 			compatible = "brcm,bcm2835-pl011", "arm,pl011", "arm,primecell";
 			reg = <0x7e201000 0x1000>;
-- 
1.7.1

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