On Fri, 2017-01-13 at 15:04 -0800, Steve Longerbeam wrote:

On 01/13/2017 04:03 AM, Philipp Zabel wrote:

quoted

Am Freitag, den 06.01.2017, 18:11 -0800 schrieb Steve Longerbeam:

quoted

Enables the OV5642 parallel-bus sensor, and the OV5640 MIPI CSI-2 sensor.
Both hang off the same i2c2 bus, so they require different (and non-
default) i2c slave addresses.

The OV5642 connects to the parallel-bus mux input port on ipu1_csi0_mux.

The OV5640 connects to the input port on the MIPI CSI-2 receiver on
mipi_csi. It is set to transmit over MIPI virtual channel 1.

Signed-off-by: Steve Longerbeam <redacted>
---
  arch/arm/boot/dts/imx6dl-sabrelite.dts   |   5 ++
  arch/arm/boot/dts/imx6q-sabrelite.dts    |   6 ++
  arch/arm/boot/dts/imx6qdl-sabrelite.dtsi | 118 +++++++++++++++++++++++++++++++
  3 files changed, 129 insertions(+)

diff --git a/arch/arm/boot/dts/imx6dl-sabrelite.dts b/arch/arm/boot/dts/imx6dl-sabrelite.dts
index 0f06ca5..fec2524 100644
--- a/arch/arm/boot/dts/imx6dl-sabrelite.dts
+++ b/arch/arm/boot/dts/imx6dl-sabrelite.dts

[...]

quoted

quoted

@@ -299,6 +326,52 @@
  	pinctrl-names = "default";
  	pinctrl-0 = <&pinctrl_i2c2>;
  	status = "okay";
+
+	ov5640: camera at 40 {
+		compatible = "ovti,ov5640";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_ov5640>;
+		clocks = <&mipi_xclk>;
+		clock-names = "xclk";
+		reg = <0x40>;
+		xclk = <22000000>;

This is superfluous, you can use clk_get_rate on mipi_xclk.

This property is actually there to tell the driver what to set the
rate to, with clk_set_rate(). So you are saying it would be better
to set the rate in the device tree and the driver should only
retrieve the rate?

Yes. Given that this is a reference clock input that is constant on a
given board and never changes during runtime, I think this is the
correct way. The clock will be fixed rate on most boards, I assume.

regards
Philipp