OV5640 Camera Interface

chethankumar · February 20, 2017, 9:27am

Hello Everyone,

I am interfacing OV5640 camera module with mipi-csi1 and i2c3, can you please tell me what are the files i need to modify in the device tree.

Regards,
chethan kumar

ldts-atsuka · February 20, 2017, 9:27am

Hi @chethan,

I personally do not know the exact way but there are some people have tried on iMX6.
https://lwn.net/Articles/658779/
https://events.linuxfoundation.org/sites/events/files/slides/petazzoni-device-tree-dummies.pdf

Please let us know on the forum when it worked for you.

leonid · February 20, 2017, 9:27am

If you are working on Android you should change the: apq8016-camera-sensor-sbc.dtsi
Take the existing ov5645 section on the mipi-csi2 and copy it to mipi-csi1.
The driver will be exactly same as ov5645 from the dts point of view.
Configure the power supplies and gpios.
I did not try to change the i2c bus, on linux i think it is possible.
After the change the driver should recognize the camera in kernel.
I think this is the correct section for standard I2C:

qcom,camera@78 {
	compatible = "ovti,ov5640";
	reg = &lt;0x78 0x0&gt;;
	qcom,slave-id = &lt;0x78 0x300a 0x5640&gt;;
	qcom,csiphy-sd-index = &lt;0&gt;;
	qcom,csid-sd-index = &lt;0&gt;;
	qcom,mount-angle = &lt;0&gt;;
	qcom,sensor-name = "ov5640";
	cam_vdig-supply = &lt;&amp;pm8916_l6&gt;;
	cam_vana-supply = &lt;&amp;pm8916_l10&gt;;
	cam_vio-supply = &lt;&amp;vph_pwr_vreg&gt;;
	qcom,cam-vreg-name = "cam_vdig", "cam_vio", "cam_vana";
	qcom,cam-vreg-min-voltage = &lt;1800000 0 2800000&gt;;
	qcom,cam-vreg-max-voltage = &lt;1800000 0 2800000&gt;;
	qcom,cam-vreg-op-mode = &lt;200000 0 80000&gt;;
	pinctrl-names = "cam_default", "cam_suspend";
	pinctrl-0 = &lt;&amp;cam_sensor_mclk0_default &amp;cam_sensor_front_default&gt;;
	pinctrl-1 = &lt;&amp;cam_sensor_mclk0_sleep &amp;cam_sensor_front_sleep&gt;;
	gpios = &lt;&amp;msm_gpio 26 0&gt;,
		&lt;&amp;msm_gpio 35 0&gt;,
		&lt;&amp;msm_gpio 34 0&gt;;
	qcom,gpio-reset = &lt;1&gt;;
	qcom,gpio-standby = &lt;2&gt;;
	qcom,gpio-req-tbl-num = &lt;0 1 2&gt;;
	qcom,gpio-req-tbl-flags = &lt;1 0 0&gt;;
	qcom,gpio-req-tbl-label = "CAMIF_MCLK",
				"CAM_RESET",
				"CAM_STANDBY";
	qcom,gpio-set-tbl-num = &lt;1 1&gt;;
	qcom,gpio-set-tbl-flags = &lt;0 2&gt;;
	qcom,gpio-set-tbl-delay = &lt;1000 4000&gt;;
	qcom,csi-lane-assign = &lt;0x4320&gt;;
	qcom,csi-lane-mask = &lt;0x3&gt;;
	qcom,sensor-position = &lt;0&gt;;
	qcom,sensor-mode = &lt;0&gt;;
	qcom,cci-master = &lt;0&gt;;
	qcom,mclk-23880000;
	clocks = &lt;&amp;clock_gcc clk_mclk0_clk_src&gt;,
			&lt;&amp;clock_gcc clk_gcc_camss_mclk0_clk&gt;;
	clock-names = "cam_src_clk", "cam_clk";
};