On 31/08/17 16:10, Linus Walleij wrote: > On Thu, Aug 31, 2017 at 1:01 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote: > >> From: Hans Verkuil <hans.verkuil@xxxxxxxxx> >> >> Add a simple HDMI CEC GPIO driver that sits on top of the cec-pin framework. >> >> While I have heard of SoCs that use the GPIO pin for CEC (apparently an >> early RockChip SoC used that), the main use-case of this driver is to >> function as a debugging tool. >> >> By connecting the CEC line to a GPIO pin on a Raspberry Pi 3 for example >> it turns it into a CEC debugger and protocol analyzer. >> >> With 'cec-ctl --monitor-pin' the CEC traffic can be analyzed. >> >> But of course it can also be used with any hardware project where the >> HDMI CEC line is hooked up to a pull-up gpio line. >> >> In addition this has (optional) support for tracing HPD changes if the >> HPD is connected to a GPIO. >> >> Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> > > This looks nice! > Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Thank you for the gpio crash course! :-) Hans -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
