From: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
Provide the wiring for the MAX9286 populated on the Eagle-V3M board
which has 4 FAKRA connectors.
No cameras are connected, and the I2C muxes are disabled by default.
Connected cameras should be defined in a device-tree overlay or included
after these definitions.
Signed-off-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
---
v2
- Rebase to mainline, and fix DTB merge issues.
v3:
- Fix up gmsl-serialiszer i2c bus unit address
v6:
- Use new i2c-mux subnode
- Make use of the GPIO controller exposed by the max9286 to expose a
hog on the line we need to hold low for camera power.
Produces this:
gpiochip7 - 2 lines:
line 0: "GPIO0OUT" "CSI0_CAMVDD_EN" output active-high [used]
line 1: "GPIO1OUT" unused output active-high
- Remove the powerdown hog, and utilise an optional enable-gpio line
instead.
---
.../arm64/boot/dts/renesas/r8a77970-eagle.dts | 135 ++++++++++++++++++
1 file changed, 135 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
index 2be89ed879a5..86caf98e9eb0 100644
--- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
@@ -6,6 +6,8 @@
* Copyright (C) 2017 Cogent Embedded, Inc.
*/
+#include <dt-bindings/gpio/gpio.h>
+
/dts-v1/;
#include "r8a77970.dtsi"
@@ -189,6 +191,11 @@
function = "i2c0";
};
+ i2c3_pins: i2c3 {
+ groups = "i2c3_a";
+ function = "i2c3";
+ };
+
scif0_pins: scif0 {
groups = "scif0_data";
function = "scif0";
@@ -200,6 +207,134 @@
status = "okay";
};
+&csi40 {
+ status = "okay";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ csi40_in: endpoint {
+ clock-lanes = <0>;
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&max9286_out0>;
+ };
+ };
+ };
+};
+
+&i2c3 {
+ pinctrl-0 = <&i2c3_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+ clock-frequency = <400000>;
+
+ gmsl: gmsl-deserializer@48 {
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ compatible = "maxim,max9286";
+ reg = <0x48>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* eagle-pca9654-max9286-pwdn */
+ enable-gpios = <&io_expander 0 GPIO_ACTIVE_HIGH>;
+
+ /*
+ * Workaround: Hog the CAMVDD line high as we can't establish a
+ * regulator-fixed on the gpio_chip exposed by &gmsl due to
+ * circular-dependency issues.
+ */
+ camvdd_en {
+ gpio-hog;
+ gpios = <0 0>;
+ output-low;
+ line-name = "CSI0_CAMVDD_EN";
+ };
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ max9286_in0: endpoint {
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ max9286_in1: endpoint {
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+ max9286_in2: endpoint {
+ };
+ };
+
+ port@3 {
+ reg = <3>;
+ max9286_in3: endpoint {
+ };
+ };
+
+ port@4 {
+ reg = <4>;
+ max9286_out0: endpoint {
+ clock-lanes = <0>;
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&csi40_in>;
+ };
+ };
+ };
+
+ i2c-mux {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ status = "disabled";
+ };
+
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+
+ status = "disabled";
+ };
+
+ i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+
+ status = "disabled";
+ };
+
+ i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+
+ status = "disabled";
+ };
+ };
+ };
+};
+
&scif0 {
pinctrl-0 = <&scif0_pins>;
pinctrl-names = "default";
--
2.20.1
