linux-kernel - Re: [PATCH v6 6/8] mfd: cros_ec: Support multiple EC in a system

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Message-ID: <20150608204614.GA20574@quad.lixom.net>
Date:	Mon, 8 Jun 2015 13:46:14 -0700
From:	Olof Johansson <olof@...om.net>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	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>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, Gwendal Grignou <gwendal@...omium.org>
Subject: Re: [PATCH v6 6/8] mfd: cros_ec: Support multiple EC in a system

On Fri, Jun 05, 2015 at 11:17:30AM +0100, Lee Jones wrote:
> On Thu, 04 Jun 2015, Javier Martinez Canillas wrote:
> 
> > From: Gwendal Grignou <gwendal@...omium.org>
> > 
> > Chromebooks can have more than one Embedded Controller so the
> > cros_ec device id has to be incremented for each EC registered.
> > 
> > Add a new structure to represent multiple EC as different char
> > devices (e.g: /dev/cros_ec, /dev/cros_pd). It connects to
> > cros_ec_device and allows sysfs inferface for cros_pd.
> > 
> > Also reduce number of allocated objects, make chromeos sysfs
> > class object a static and add refcounting to prevent object
> > deletion while command is in progress.
> > 
> > Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
> > Reviewed-by: Dmitry Torokhov <dtor@...omium.org>
> > Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> > Tested-by: Heiko Stuebner <heiko@...ech.de>
> > ---
> > 
> > Changes since v5:
> >  - Don't allow to change the device name from DT. Suggested by Lee Jones.
> >  - Expand error messages in case of mfd_add_devices() failure.
> >    Suggested by Lee Jones.
> > 
> > Changes since v4:
> >  - Use cros-ec-name DT property instead of devname. Suggested by Lee Jones.
> >  - Pass PLATFORM_DEVID_AUTO directly to mfd_add_devices().
> >    Suggested by Lee Jones.
> >  - Add Heiko Stuebner tested-by tag.
> >  - Fix get_version by passing the cmd_offset to EC_CMD_GET_VERSION.
> > 
> > Changes since v3:
> >  - Add defines for the EC and PD index constants.
> >  - Remove cros_ec_dev_register() and declare the mfd_cells as static structs.
> >    Suggested by Lee Jones.
> >  - Add a new line before the return statement in cros_ec_dev_register().
> >    Suggested by Lee Jones.
> > 
> > Changes since v2: None
> > 
> > Changes since v1:
> >   - Squash patch that adds support to represent EC's as different
> >     char devices (e.g: /dev/cros_ec, /dev/cros_pd):
> >     https://chromium-review.googlesource.com/#/c/217297/
> >     Suggested by Gwendal Grignou
> >   - Use cros_ec instead of cros-ec in the subject line to be consistent.
> >     Suggested by Gwendal Grignou
> > ---
> >  drivers/input/keyboard/cros_ec_keyb.c      |   2 +-
> >  drivers/mfd/cros_ec.c                      |  52 ++++++++++--
> >  drivers/mfd/cros_ec_i2c.c                  |   1 -
> >  drivers/mfd/cros_ec_spi.c                  |   1 -
> >  drivers/platform/chrome/cros_ec_dev.c      | 130 ++++++++++++++++++++---------
> >  drivers/platform/chrome/cros_ec_dev.h      |   7 --
> >  drivers/platform/chrome/cros_ec_lightbar.c |  75 +++++++++--------
> >  drivers/platform/chrome/cros_ec_lpc.c      |   1 -
> >  drivers/platform/chrome/cros_ec_sysfs.c    |  48 +++++------
> >  include/linux/mfd/cros_ec.h                |  44 ++++++++--
> >  10 files changed, 234 insertions(+), 127 deletions(-)
> 
> For my own reference:
>   Acked-by: Lee Jones <lee.jones@...aro.org>
> 
> Let me know when you have all the appropriate Acks and I'll apply the
> set.

Whole series:

Acked-by: Olof Johansson <olof@...om.net>

I'm OK with this going through the mfd tree, since there's nothing queued up
for chrome-platform that this would conflict with.


-Olof
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