linux-kernel - Re: [RESEND PATCH 0/8] cros_ec: Add multiple EC and protocol v3 support

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Message-ID: <552F64F7.80908@collabora.co.uk>
Date:	Thu, 16 Apr 2015 09:29:59 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Olof Johansson <olof@...om.net>
CC:	Lee Jones <lee.jones@...aro.org>,
	Doug Anderson <dianders@...omium.org>,
	Bill Richardson <wfrichar@...omium.org>,
	Simon Glass <sjg@...gle.com>,
	Gwendal Grignou <gwendal@...gle.com>,
	Stephen Barber <smbarber@...omium.org>,
	Filipe Brandenburger <filbranden@...gle.com>,
	Todd Broch <tbroch@...omium.org>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH 0/8] cros_ec: Add multiple EC and protocol v3 support

Hello,

On 04/06/2015 06:14 PM, Javier Martinez Canillas wrote:
> 
> Newer Chromebooks have more than one Embedded Controller (EC) in the
> system. These additional ECs are connected through I2C with a host EC
> which is the one that is connected to the Application Processor (AP)
> through I2C, SPI or LPC.
> 
> So on these platforms, sub-processors are chained to each other:
> 
> AP <--> Host EC <--> Power Delivery (PD) EC
> 
> The AP sends commands to the additional EC through the host EC using
> a set of passthru commands and the host redirects to the correct EC.
> 
> This series adds support for multiple EC in a system and also for the
> protocol version 3 that is used on newer ECs.
> 

Any comments about this series? I know that we are in the middle of the
merge window but it would be great if I can get some feedback to get it
ready and re-post for 4.2 (addressing any issue) once 4.1-rc1 is out.

> Most patches were taken from the downstream ChromiumOS v3.14 tree with
> fixes squashed, split to minimise the cross subsystem churn and changes
> for mainline inclusion but were not modified functionality wise.
> 
> The series depend on "platform/chrome: Add user-space dev inferface support"
> [0] that is already merged in the chrome-platform tree so probably these
> patches should also go through that tree once the mfd patches are acked.
> 
> The series is a resend of a patch-set posted a month ago [1]. The only big

As I said, the original patchset was post about a month ago and this re-sent
10 days ago so it would be great to have some feedback on the series.

[snip]

> 
> [0]: https://lkml.org/lkml/2015/2/2/214
> [1]: https://lkml.org/lkml/2015/3/12/621
> [2]: http://cgit.collabora.com/git/user/javier/ec.git/log/?h=mainline-ioctl-zero-length
> 

Best regards,
Javier
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