Hi Frank, As I mentioned on the list, I'm currently on a holiday, so, replying briefly. Since em28xx is a USB device, I conclude, that it's supplying clock to its components including the ov2640 sensor. So, yes, I think the driver should export a V4L2 clock. Thanks Guennadi -----Original Message----- From: "Frank Schäfer" <fschaefer.oss@xxxxxxxxxxxxxx> To: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>, Linux Media Mailing List <linux-media@xxxxxxxxxxxxxxx> Sent: Fr., 16 Aug 2013 21:03 Subject: em28xx + ov2640 and v4l2-clk Hi Guennadi, since commit 9aea470b399d797e88be08985c489855759c6c60 "soc-camera: switch I2C subdevice drivers to use v4l2-clk", the em28xx driver fails to register the ov2640 subdevice (if needed). The reason is that v4l2_clk_get() fails in ov2640_probe(). Does the em28xx driver have to register a (pseudo ?) clock first ? Regards, Frank -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
