linux-kernel - Re: [PATCH 2/3] mfd: cros_ec: Create sysfs attributes for the ChromeOS EC.

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Date:	Tue, 18 Nov 2014 14:26:45 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Doug Anderson <dianders@...omium.org>,
	Bill Richardson <wfrichar@...omium.org>,
	Olof Johansson <olof@...om.net>, Simon Glass <sjg@...gle.com>,
	Gwendal Grignou <gwendal@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] mfd: cros_ec: Create sysfs attributes for the
 ChromeOS EC.

On Mon, 17 Nov 2014, Javier Martinez Canillas wrote:

> From: Bill Richardson <wfrichar@...omium.org>
> 
> This adds the first few sysfs attributes for the Chrome OS EC. These
> controls are made available under /sys/devices/virtual/chromeos/cros_ec
> 
>     flashinfo   - display current flash info

drivers/mtd?

>     reboot      - tell the EC to reboot in various ways

drivers/power?

>     version     - information about the EC software and hardware

What's the difference between this version and the version you can
read in the new _dev driver?

> Future changes will build on this to add additional controls.
> 
> From a root shell, you should be able to do things like this:
> 
>     cd /sys/devices/virtual/chromeos/cros_ec
>     cat flashinfo
>     cat version
>     echo rw > reboot
>     cat version
>     echo ro > reboot
>     cat version
>     echo rw > reboot
>     cat version
>     echo cold > reboot
> 
> That last command will reboot the AP too.
> 
> Signed-off-by: Bill Richardson <wfrichar@...omium.org>
> Reviewed-by: Olof Johansson <olofj@...omium.org>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
>  drivers/mfd/Makefile        |   3 +-
>  drivers/mfd/cros_ec_dev.c   |  10 +-
>  drivers/mfd/cros_ec_dev.h   |  26 +++++
>  drivers/mfd/cros_ec_sysfs.c | 271 ++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 307 insertions(+), 3 deletions(-)
>  create mode 100644 drivers/mfd/cros_ec_dev.h
>  create mode 100644 drivers/mfd/cros_ec_sysfs.c

[...]

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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