Re: [PATCH v4 3/7] misc: Add cros_ec_lpc driver for x86 devices

Javier Martinez Canillas
2015-02-02T11:57:21Z

Hello,

On 01/30/2015 01:51 PM, Javier Martinez Canillas wrote:
> On 01/29/2015 10:11 PM, Paul Bolle wrote:
>>> + help
>>> + If you say Y here, you get support for talking to the ChromeOS EC
>>> + over an LPC bus. This uses a simple byte-level protocol with a
>>> + checksum. This is used for userspace access only. The kernel
>>> + typically has its own communication methods.
>>> +
>>
>> What happens when you say M?
>>
>
> Since it is a tristate kconfig symbol, it can be built as a kernel module
> but since there isn't a LPC subsystem, the platform device is registered
> in the module_init() function. So, building as a module is trickier since
> there won't be an uevent that can trigger a module auto-load based on the
> modinfo aliases information.
>

FYI, I noticed that other x86 platform drivers use the dmi system information
to fill dmi modaliases so the modules are auto-loaded. So I did the same and
posted a new version 5 [0] of this series.

Best regards,
Javier

[0]: https://lkml.org/lkml/2015/2/2/214