This commit is not intended to be merged. Instead we will use
overlays to enable the panel, and this commit is just a demo of how
things get wired up.
Signed-off-by: Eric Anholt <e...@anholt.net>
---
arch/arm/boot/dts/bcm2835-rpi-b-plus.dts | 5 ++++
arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts | 5 ++++
arch/arm/boot/dts/bcm2835-rpi-b.dts | 5 ++++
arch/arm/boot/dts/bcm2836-rpi-2-b.dts | 5 ++++
arch/arm/boot/dts/bcm283x.dtsi | 30 +++++++++++++++++++++++-
arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts | 5 ++++
6 files changed, 54 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
b/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
index 432088ebb0a1..79f433eacb8b 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
@@ -101,3 +101,8 @@
&hdmi {
hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
};
+
+&i2c_dsi {
+ gpios = <&gpio 28 0
+ &gpio 29 0>;
+};
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
b/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
index 4133bc2cd9be..145e0e4c2c7f 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
@@ -94,3 +94,8 @@
&hdmi {
hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
};
+
+&i2c_dsi {
+ gpios = <&gpio 2 0
+ &gpio 3 0>;
+};
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts
b/arch/arm/boot/dts/bcm2835-rpi-b.dts
index 4d56fe3006b0..5b3f85883f0c 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts
@@ -89,3 +89,8 @@
&hdmi {
hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
};
+
+&i2c_dsi {
+ gpios = <&gpio 0 0
+ &gpio 1 0>;
+};
diff --git a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
index bf19e8cfb9e6..aa63cc29eca8 100644
--- a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
+++ b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
@@ -39,3 +39,8 @@
&hdmi {
hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
};
+
+&i2c_dsi {
+ gpios = <&gpio 28 0
+ &gpio 29 0>;
+};
diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
index 35cea3fcaf5c..682f11a4fc91 100644
--- a/arch/arm/boot/dts/bcm283x.dtsi
+++ b/arch/arm/boot/dts/bcm283x.dtsi
@@ -505,7 +505,11 @@
"dsi1_ddr2",
"dsi1_ddr";
- status = "disabled";
+ port {
+ dsi_out_port: endpoint {
+ remote-endpoint = <&panel_dsi_port>;
+ };
+ };
};
i2c1: i2c@7e804000 {
@@ -575,6 +579,30 @@
vc4: gpu {
compatible = "brcm,bcm2835-vc4";
};
+
+ i2c_dsi: i2c {
+ /* We have to use i2c-gpio because the
+ * firmware is also polling another device
+ * using the only hardware I2C bus that could
+ * connect to these pins.
+ */
+ compatible = "i2c-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ gpios = <&gpio 28 0
+ &gpio 29 0>;
+
+ lcd@45 {
+ compatible =
"raspberrypi,7inch-touchscreen-panel";
+ reg = <0x45>;
+
+ port {
+ panel_dsi_port: endpoint {
+ remote-endpoint =
<&dsi_out_port>;
+ };
+ };
+ };
+ };
};
clocks {
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 c309633a1e87..c11026c6c8b4 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
+++ b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
@@ -22,3 +22,8 @@
&uart1 {
status = "okay";
};
+
+&i2c_dsi {
+ gpios = <&gpio 44 0
+ &gpio 45 0>;
+};
--
2.11.0
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