From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752099AbbFBVQL (ORCPT ); Tue, 2 Jun 2015 17:16:11 -0400 Received: from gloria.sntech.de ([95.129.55.99]:42217 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751393AbbFBVQB (ORCPT ); Tue, 2 Jun 2015 17:16:01 -0400 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Javier Martinez Canillas Cc: Lee Jones , Samuel Ortiz , Olof Johansson , Doug Anderson , Bill Richardson , Simon Glass , Gwendal Grignou , Stephen Barber , Filipe Brandenburger , Todd Broch , Alexandru M Stan , linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v4 0/8] mfd: cros_ec: Add multi EC and proto v3 support Date: Tue, 02 Jun 2015 23:15:49 +0200 Message-ID: <2123062.dmIBPlf795@diego> User-Agent: KMail/4.14.1 (Linux/3.16.0-4-amd64; KDE/4.14.2; x86_64; ; ) In-Reply-To: <1433232671-27679-1-git-send-email-javier.martinez@collabora.co.uk> References: <1433232671-27679-1-git-send-email-javier.martinez@collabora.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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