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

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Date:	Tue, 02 Jun 2015 23:15:49 +0200
From:	Heiko Stübner <heiko@...ech.de>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
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

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>


Heiko
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