[PATCH 3/3] arm64: Add the Raspberry Pi firmware's interface to the FXL6408.

Eric Anholt eric at anholt.net
Mon Sep 19 09:13:14 PDT 2016


This gets us hotplug detection of HDMI, so that graphics now works at
boot.  Tested with watching the output of xrandr while plugging and
unplugging the HDMI cable.

Signed-off-by: Eric Anholt <eric at anholt.net>
---
 arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
index 7841b724e340..2460b47737e9 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
+++ b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
@@ -23,8 +23,25 @@
 			linux,default-trigger = "default-on";
 		};
 	};
+
+	soc {
+		fxl6408: firmware-gpio-128 {
+			compatible = "raspberrypi,firmware-gpio";
+			gpio-controller;
+			#gpio-cells = <2>;
+			firmware = <&firmware>;
+			ngpios = <8>;
+			gpio-line-names = "BT_ON", "WL_ON", "", "LAN_RUN", "HPD_N", "CAM_GPIO0", "CAM_GPIO1", "PWR_LOW_N";
+
+			raspberrypi,firmware-gpio-offset = <128>;
+		};
+	};
 };
 
 &uart1 {
 	status = "okay";
 };
+
+&hdmi {
+	hpd-gpios = <&fxl6408 4 GPIO_ACTIVE_HIGH>;
+};
-- 
2.9.3




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