Hi!
Now that the camera interface has been merged in mainline Kernel, I would like to try to use the OrangePi OV5640 camera module on my OrangePi One.
So with the latest Armbian Bionic (20.02.1, kernel 5.4.20), I have been trying to get a device tree overlay.
But for now, it fails to compile with:
$ sudo armbian-add-overlay sun8i-h3-csi.dts
Compiling the overlay
Error: sun8i-h3-csi.dts:27.23-24 syntax error
FATAL ERROR: Unable to parse input tree
Error compiling the overlay
My current overlay looks like this:
/dts-v1/;
/plugin/;
/ {
compatible = "allwinner,sun8i-h3";
fragment@0 {
target = <&pio>;
__overlay__ {
csi_mclk_pin: csi-mclk-pin {
pins = "PE1";
function = "csi";
};
};
};
fragment@1 {
target = <&i2c2>;
__overlay__ {
status = "okay";
ov5640: camera@3c {
compatible = "ovti,ov5640";
reg = <0x3c>;
pinctrl-names = "default";
pinctrl-0 = <&csi_mclk_pin>;
clocks = <&ccu CLK_CSI_MCLK>;
clock-names = "xclk";
AVDD-supply = <®_aldo1>;
DOVDD-supply = <®_dldo3>;
DVDD-supply = <®_eldo3>;
reset-gpios = <&pio 4 14 GPIO_ACTIVE_LOW>; /* CSI-RST-R: PE14 */
powerdown-gpios = <&pio 4 15 GPIO_ACTIVE_HIGH>; /* CSI-STBY-R: PE15 */
port {
ov5640_ep: endpoint {
remote-endpoint = <&csi_ep>;
bus-width = <8>;
data-shift = <2>; /* lines 9:2 are used */
hsync-active = <1>; /* Active high */
vsync-active = <0>; /* Active low */
data-active = <1>; /* Active high */
pclk-sample = <1>; /* Rising */
};
};
};
};
};
fragment@2 {
target = <&csi>;
__overlay__ {
status = "okay";
port {
csi_ep: endpoint {
remote-endpoint = <&ov5640_ep>;
bus-width = <8>;
hsync-active = <1>; /* Active high */
vsync-active = <0>; /* Active low */
data-active = <1>; /* Active high */
pclk-sample = <1>; /* Rising */
};
};
};
};
};
So the line 27, which seem to trigger the error is: `clocks = <&ccu CLK_CSI_MCLK>;`
Also, according to the documentation, the regulator fields are required but this board does not have much regulators (like AXP209), so I have no idea what to write here.
But this is my first time writing a device-tree overlay so I am not sure what is wrong with this line.
Could someone guide me to get my overlay right?
And, does anyone already got the CSI interface working with OV5460 sensor on a H3 based board?
Thank you.
