[PATCH 3/3] ARM: bcm2835: Add the necessary firmware driver information to the DT

[Eric Anholt]

This gets the USB power domain turned on so that DWC2 can probe, even
if the bootloader didn't turn it on for us (which is the case if you
use the RPi firmware without chainloading U-Boot).

Signed-off-by: Eric Anholt <eric at anholt.net>
---
 arch/arm/boot/dts/bcm2835-rpi.dtsi | 13 +++++++++++++
 arch/arm/boot/dts/bcm2835.dtsi     |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
index 46780bb..fa9afd1 100644
--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
@@ -1,3 +1,4 @@
+#include <dt-bindings/arm/raspberrypi-firmware-power.h>
 #include "bcm2835.dtsi"
 
 / {
@@ -14,6 +15,14 @@
 			linux,default-trigger = "heartbeat";
 		};
 	};
+
+	soc {
+		firmware: firmware {
+			compatible = "raspberrypi,firmware";
+			mboxes = <&mailbox 0>;
+			#power-domain-cells = <1>;
+		};
+	};
 };
 
 &gpio {
@@ -49,3 +58,7 @@
 	status = "okay";
 	bus-width = <4>;
 };
+
+&usb {
+	power-domains = <&firmware POWER_DOMAIN_USB>;
+};
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index 664aa25..5734650 100644
--- a/arch/arm/boot/dts/bcm2835.dtsi
+++ b/arch/arm/boot/dts/bcm2835.dtsi
@@ -148,7 +148,7 @@
 			status = "disabled";
 		};
 
-		usb at 7e980000 {
+		usb: usb at 7e980000 {
 			compatible = "brcm,bcm2835-usb";
 			reg = <0x7e980000 0x10000>;
 			interrupts = <1 9>;
-- 
2.1.4