linux-kernel - Re: [PATCH 2/3] platform/chrome: cros_ec_lpc

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Date:	Wed, 4 Mar 2015 11:27:36 -0800
From:	Olof Johansson <olof@...om.net>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Doug Anderson <dianders@...omium.org>,
	Bill Richardson <wfrichar@...omium.org>,
	Simon Glass <sjg@...gle.com>,
	Gwendal Grignou <gwendal@...gle.com>,
	Fengguang Wu <fengguang.wu@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] platform/chrome: cros_ec_lpc - Depend on X86 || COMPILE_TEST

On Mon, Mar 2, 2015 at 5:58 AM, Javier Martinez Canillas
<javier.martinez@...labora.co.uk> wrote:
> Hello Alan,
>
> On 03/02/2015 02:45 PM, One Thousand Gnomes wrote:
>> On Fri, 27 Feb 2015 06:37:49 +0100
>> Javier Martinez Canillas <javier.martinez@...labora.co.uk> wrote:
>>
>>> The Low Pin Count bus was introduced by Intel and is only used
>>> in x86 computers
>>
>> The LPC bus is in all but name a slightly chopped down ISA bus. It is not
>> x86 specific any more, and indeed there are wishbone/LPC busses used on
>> all sorts of systems and processor types.
>>
>
> Thanks a lot for the clarification, I didn't know that.
>
>> The ChromeOS EC may well be X86 specific but if so please fix the commit
>> message accordingly.
>>
>
> I'll let the ChromiumOS folks to answer if EC connected through LPC will
> only be used in x86 Chromebooks and non-x86 Chromebooks will always use
> either SPI or I2C. Or if a non-x86 Chromebook with a EC connected through
> LPC may exist in the future.

I doubt we'll connect it with LPC on anything but x86, on other
platforms we tend to go with SPI or i2c instead.

> To know if I should either update the commit message or drop $subject,
> since after patch 1/3 the driver builds correctly in other architectures.

I'll reword the commit message when I apply (which I'll do shortly).


-Olof
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