Re: [PATCH 3/3] Input: applespi: Add trace_event module param for early tracing.

[Dmitry Torokhov]

Hi Ronald,

On Wed, Feb 17, 2021 at 11:07:18AM -0800, Ronald Tschalär wrote:
> The problem is that tracing can't be set via sysfs until the module is
> loaded, at which point the keyboard and trackpad initialization commands
> have already been run and hence tracing can't be used to debug problems
> here.
> 
> Adding this param allows tracing to be enabled for messages sent and
> received during module probing. It takes comma-separated list of events,
> e.g.
> 
>   trace_event=applespi_tp_ini_cmd,applespi_bad_crc

You can unbind and rebind a device to a driver via sysfs as many times
as needed (see bind and unbind driver sysfs attributes), so I believe

Thanks.

-- 
Dmitry