linux-kernel - Re: [PATCH v4 0/8] mfd: cros_ec: Add multi EC and proto v3 support

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Message-ID: <556EA28C.2080200@collabora.co.uk>
Date:	Wed, 03 Jun 2015 08:45:32 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Heiko Stübner <heiko@...ech.de>
CC:	Lee Jones <lee.jones@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Olof Johansson <olof@...om.net>,
	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>,
	Alexandru M Stan <amstan@...omium.org>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v4 0/8] mfd: cros_ec: Add multi EC and proto v3 support

Hello Heiko,

On 06/02/2015 11:15 PM, Heiko Stübner wrote:
> Am Dienstag, 2. Juni 2015, 10:11:03 schrieb Javier Martinez Canillas:
>> Hello,
>> 
>> 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 different transports (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 is a v4 of a series that adds support for multiple EC in a system
>> and also for the protocol version 3 that is used on newer ECs.
>> 
>> 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.
>> 
>> This version addresses a lot of issues pointed out by Lee Jones on the v3
>> posted before [0].
>> 
>> The patches are based on top of "[PATCH 0/2] mfd: cros_ec: Small cleanups"
>> [1] that were posted before and was already picked by Lee Jones.
>> 
>> Testing was done on some Chromebooks that have a single EC and support
>> protocol v2 such as the Exynos5250 Snow, Exynos5420 Peach Pit and Exynos5800
>> Peach Pi to be sure that no regressions were introduced for these machines.
> 
> I just gave this a try on veyron and everything still works as expected.
> 
> All patches except "[PATCH v4 6/8] mfd: cros_ec: Support multiple EC in a 
> system" already have Tested-by tags, so this patch now is also
> 
> Tested-by: Heiko Stuebner <heiko@...ech.de>
> 

Thanks a lot for testing the series again.

Now let's wait for Olof to review/ack/provide feedback on patches #1-#6
that touches drivers/platform/chrome, so Lee can merge through his tree.

> 
> Heiko
>

Best regards,
Javier
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