From: Stephen Warren <swarren@wwwdotorg.org>
To: Doug Anderson <dianders@chromium.org>,
lee.jones@linaro.org, wsa@the-dreams.de
Cc: swarren@nvidia.com, abrestic@chromium.org, dgreid@chromium.org,
olof@lixom.net, sjg@chromium.org,
linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org,
Vincent Palatin <vpalatin@chromium.org>,
robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
rdunlap@infradead.org, sameo@linux.intel.com, jdelvare@suse.de,
shane.huang@amd.com, maxime.ripard@free-electrons.com,
laurent.pinchart+renesas@ideasonboard.com,
u.kleine-koenig@pengutronix.de, bjorn.andersson@sonymobile.com,
kevin.strasser@linux.intel.com, linux@prisktech.co.nz,
andrew@lunn.ch, andriy.shevchenko@linux.intel.com,
schwidefsky@de.ibm.com, matt.porter@linaro.org,
ch.naveen@samsung.com, devicetree@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org
Subject: Re: [PATCH v3 6/7] i2c: ChromeOS EC tunnel driver
Date: Thu, 01 May 2014 13:05:39 -0600 [thread overview]
Message-ID: <53629B03.6090408@wwwdotorg.org> (raw)
In-Reply-To: <1398879850-9111-7-git-send-email-dianders@chromium.org>
On 04/30/2014 11:44 AM, Doug Anderson wrote:
> On ARM Chromebooks we have a few devices that are accessed by both the
> AP (the main "Application Processor") and the EC (the Embedded
> Controller). These are:
> * The battery (sbs-battery).
> * The power management unit tps65090.
...
> On the Samsung ARM Chromebook 2 the scheme is changed yet again, now:
> * The AP/EC comms are now using SPI for faster speeds.
> * The EC's i2c bus is exposed to the AP through a full i2c tunnel.
>
> The upstream "tegra124-venice2" uses the same scheme as the Samsung
> ARM Chromebook 2, though it has a different set of components on the
> other side of the bus.
>
> This driver supports the scheme used by the Samsung ARM Chromebook 2.
> Future patches to this driver could add support for the battery tunnel
> on the HP Chromebook 11 (and perhaps could even be used to access
> tps65090 on the HP Chromebook 11 instead of using a special driver,
> but I haven't researched that enough).
The binding looks reasonable to me, so that part,
Acked-by: Stephen Warren <swarren@nvidia.com>
next prev parent reply other threads:[~2014-05-01 19:05 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-30 17:44 [PATCH v3 0/7] Add cros_ec changes for newer boards Doug Anderson
2014-04-30 17:44 ` Doug Anderson
2014-04-30 17:44 ` Doug Anderson
2014-04-30 17:44 ` [PATCH v3 1/7] mfd: cros_ec: spi: calculate delay between transfers correctly Doug Anderson
2014-05-20 8:43 ` Lee Jones
2014-04-30 17:44 ` [PATCH v3 3/7] mfd: cros_ec: spi: Make the cros_ec_spi timeout more reliable Doug Anderson
[not found] ` <1398879850-9111-4-git-send-email-dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2014-05-20 8:45 ` Lee Jones
2014-05-20 8:45 ` Lee Jones
2014-04-30 17:44 ` [PATCH v3 4/7] mfd: cros_ec: spi: Increase cros_ec_spi deadline from 5ms to 100ms Doug Anderson
2014-05-20 8:45 ` Lee Jones
2014-04-30 17:44 ` [PATCH v3 5/7] mfd: cros_ec: Sync to the latest cros_ec_commands.h from EC sources Doug Anderson
2014-05-20 8:46 ` Lee Jones
2014-06-11 10:37 ` Paul Bolle
2014-06-11 15:11 ` Doug Anderson
2014-06-11 15:11 ` Doug Anderson
[not found] ` <CAD=FV=XL9tnEqza8Zx8mt_Z7-bj8TCzdeyHMhnpewKp_1CR-ig-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-06-13 8:08 ` Paul Bolle
2014-06-13 8:08 ` Paul Bolle
2014-06-13 15:22 ` Doug Anderson
2014-06-13 15:22 ` Doug Anderson
2014-06-17 8:53 ` Paul Bolle
2014-06-17 16:20 ` Stephen Warren
[not found] ` <53A06AD4.3000704-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2014-06-17 16:43 ` Paul Bolle
2014-06-17 16:43 ` Paul Bolle
[not found] ` <1398879850-9111-1-git-send-email-dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2014-04-30 17:44 ` [PATCH v3 2/7] mfd: cros_ec: spi: Add mutex to cros_ec_spi Doug Anderson
2014-04-30 17:44 ` Doug Anderson
2014-05-20 8:44 ` Lee Jones
2014-04-30 17:44 ` [PATCH v3 6/7] i2c: ChromeOS EC tunnel driver Doug Anderson
2014-04-30 17:44 ` Doug Anderson
2014-05-01 19:05 ` Stephen Warren [this message]
2014-05-06 10:55 ` Rahul Sharma
2014-05-06 15:27 ` Doug Anderson
2014-05-12 20:18 ` Doug Anderson
2014-05-19 10:50 ` Wolfram Sang
2014-05-19 15:09 ` Doug Anderson
2014-05-19 17:22 ` Lee Jones
2014-05-19 22:19 ` Wolfram Sang
2014-05-19 22:19 ` Wolfram Sang
2014-05-20 8:43 ` Lee Jones
[not found] ` <1398879850-9111-7-git-send-email-dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2014-05-20 8:47 ` Lee Jones
2014-05-20 8:47 ` Lee Jones
2014-05-20 17:35 ` Stephen Warren
2014-05-20 17:35 ` Stephen Warren
2014-04-30 17:44 ` [PATCH v3 7/7] ARM: tegra: Add the EC i2c tunnel to tegra124-venice2 Doug Anderson
2014-04-30 17:44 ` Doug Anderson
2014-04-30 17:44 ` Doug Anderson
2014-05-01 19:06 ` Stephen Warren
2014-05-01 19:06 ` Stephen Warren
[not found] ` <53629B29.3050702-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2014-05-20 8:48 ` Lee Jones
2014-05-20 8:48 ` Lee Jones
2014-05-20 8:48 ` Lee Jones
2014-06-16 19:01 ` Stephen Warren
2014-06-16 19:01 ` Stephen Warren
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