linux-kernel - Re: [PATCH 0/5] Add ChromeOS Embedded Controller support

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Date:	Tue, 12 Feb 2013 16:37:27 -0800
From:	Simon Glass <sjg@...omium.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Simon Glass <sjg@...omium.org>, linux-input@...r.kernel.org,
	Vincent Palatin <vpalatin@...omium.org>,
	Roland Stigge <stigge@...com.de>,
	Grant Likely <grant.likely@...retlab.ca>,
	Che-Liang Chiou <clchiou@...omium.org>,
	devicetree-discuss@...ts.ozlabs.org,
	Jonathan Kliegman <kliegs@...omium.org>,
	linux-doc@...r.kernel.org, Rob Landley <rob@...dley.net>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Felipe Balbi <balbi@...com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Sourav Poddar <sourav.poddar@...com>,
	Luigi Semenzato <semenzato@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Rob Herring <rob.herring@...xeda.com>
Subject: Re: [PATCH 0/5] Add ChromeOS Embedded Controller support

Hi Samuel,

On Wed, Dec 12, 2012 at 1:33 PM, Simon Glass <sjg@...omium.org> wrote:
> (get_maintainer.pl has produced an enormous list - I hope you are all
> interested.)
>
> The ChromeOS Embedded Controller (EC) is an Open Source EC implementation
> used on ARM and Intel Chromebooks. Current implementations use a Cortex-M3
> connected on a bus (such as I2C, SPI, LPC) to the AP. A separate interrupt
> line is used to indicate when the EC needs service.
>
> Functions performed by the EC vary by platform, but typically include
> battery charging, keyboard scanning and power sequencing.
>
> This series includes support for the EC message protocol, and implements
> a matrix keyboard handler for Linux using the protocol. The EC performs
> key scanning and passes scan data in response to AP requests. This is
> used on the Samsung ARM Chromebook. No driver is available for LPC at
> present.
>
> This series can in principle operate on any hardware, but for it to actually
> work on the Samsung ARM Chromebook, it needs patches which are currently in
> progress to mainline: Exynos FDT interrupt support and I2C bus arbitration.
>
> The driver is device-tree-enabled and a suitable binding is included in
> this series. Example device tree nodes are included in the examples,
> but no device tree patch for exynos5250-snow is provided at this stage, since
> we must wait for the above-mentioned patches to land to avoid errors from
> dtc. This can be added with a follow-on patch when that work is complete.
>
>
> Simon Glass (5):
>   mfd: Add ChromeOS EC messages header
>   mfd: Add ChromeOS EC implementation
>   mfd: Add ChromeOS EC I2C driver
>   mfd: Add ChromeOS EC SPI driver
>   Input: Add ChromeOS EC keyboard driver

Are you planning to pick the mfd part of this series please? I am
going to send a new version of the input patch on its own now that the
DT binding is agreed.

Regards,
Simon

>
>  .../devicetree/bindings/input/cros-ec-keyb.txt     |   77 ++
>  Documentation/devicetree/bindings/mfd/cros-ec.txt  |   56 +
>  drivers/input/keyboard/Kconfig                     |   10 +
>  drivers/input/keyboard/Makefile                    |    1 +
>  drivers/input/keyboard/cros_ec_keyb.c              |  413 ++++++
>  drivers/mfd/Kconfig                                |   28 +
>  drivers/mfd/Makefile                               |    3 +
>  drivers/mfd/cros_ec.c                              |  219 ++++
>  drivers/mfd/cros_ec_i2c.c                          |  262 ++++
>  drivers/mfd/cros_ec_spi.c                          |  412 ++++++
>  include/linux/mfd/cros_ec.h                        |  190 +++
>  include/linux/mfd/cros_ec_commands.h               | 1369 ++++++++++++++++++++
>  12 files changed, 3040 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/input/cros-ec-keyb.txt
>  create mode 100644 Documentation/devicetree/bindings/mfd/cros-ec.txt
>  create mode 100644 drivers/input/keyboard/cros_ec_keyb.c
>  create mode 100644 drivers/mfd/cros_ec.c
>  create mode 100644 drivers/mfd/cros_ec_i2c.c
>  create mode 100644 drivers/mfd/cros_ec_spi.c
>  create mode 100644 include/linux/mfd/cros_ec.h
>  create mode 100644 include/linux/mfd/cros_ec_commands.h
>
> --
> 1.7.7.3
>
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