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From: Grant Likely <grant.likely@linaro.org>
To: Lee Jones <lee.jones@linaro.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: wsa@the-dreams.de, linus.walleij@linaro.org,
	linux-i2c@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 0/9] i2c: Relax mandatory I2C ID table passing (+ some creep)
Date: Sat, 07 Jun 2014 00:33:41 +0100	[thread overview]
Message-ID: <20140606233341.D7C75C42771@trevor.secretlab.ca> (raw)
In-Reply-To: <1402069952-28022-1-git-send-email-lee.jones@linaro.org>

On Fri,  6 Jun 2014 16:52:23 +0100, Lee Jones <lee.jones@linaro.org> wrote:
> Hi Wolfram,
>   
> As previously discussed I believe it should be okay for an I2C device
> driver _not_ supply an I2C ID table to match to.  The I2C subsystem
> should be able to match via other means, such as via OF tables.  The
> blocking factor during our previous conversation was to keep
> registering via sysfs up and running.  This set does that.
>   
> After thinking more deeply about the problem, it occurred to me that
> any I2C device driver which uses the sysfs method and issues an
> of_match_device() would also fail their probe().  Bolted on to this
> set is a new, more generic way for these devices to match against
> either of the I2C/OF tables.
> 
> I hope this ticks all of your boxes.
> 
> v2:
>   - Removal of ACPI support (this is really an OF issue).
>   - Add a new .probe2( with will seamlessly replace
>   - Supply a warning on devices matching via OF without a suitable compatible
>   - Remove unified match_device() - bad idea as it subverts type-safe behaviour
>   - Provide examples of the kind of clean-up possible after this set.
>     - I already have the full support from the maintainer of these drivers =;-) 

Aside from patch 7/9 and the comment I made about struct device vs.
struct i2c_client in the API, I think this series looks good. You can
add my acks to 1-6 and 8-9. Number 7 is nacked.

Acked-by: Grant Likely <grant.likely@linaro.org>

g.

> 
> Kind regards,
> Lee
> 
>  drivers/i2c/i2c-core.c      | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------
>  drivers/mfd/88pm860x-core.c |  5 ++---
>  drivers/mfd/as3722.c        | 12 ++----------
>  drivers/of/device.c         | 19 ++++++++++++++++++-
>  include/linux/i2c.h         | 29 ++++++++++++++++++++++++++++-
>  5 files changed, 114 insertions(+), 24 deletions(-)
> 


      parent reply	other threads:[~2014-06-07  7:31 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-06 15:52 Lee Jones
2014-06-06 15:52 ` [PATCH 1/9] i2c: Add pointer dereference protection to i2c_match_id() Lee Jones
2014-06-06 22:59   ` Grant Likely
2014-06-06 15:52 ` [PATCH 2/9] i2c: Add the ability to match device to compatible string without an of_node Lee Jones
2014-06-06 15:52 ` [PATCH 3/9] i2c: Match using traditional OF methods, then by vendor-less compatible strings Lee Jones
2014-06-06 23:19   ` Grant Likely
2014-06-06 15:52 ` [PATCH 4/9] i2c: Make I2C ID tables non-mandatory for DT'ed devices Lee Jones
2014-06-06 15:52 ` [PATCH 5/9] i2c: Export i2c_match_id() for direct use by device drivers Lee Jones
2014-06-06 15:52 ` [PATCH 6/9] i2c: Provide a temporary .probe2() call-back type Lee Jones
2014-06-06 15:52 ` [PATCH 7/9] of/device: Allow I2C devices to OF match without supplying an OF node Lee Jones
2014-06-06 23:28   ` Grant Likely
2014-06-06 15:52 ` [PATCH 8/9] mfd: 88pm860x: Move over to new I2C device .probe() call Lee Jones
2014-06-06 15:52 ` [PATCH 9/9] mfd: as3722: Rid driver of superfluous I2C device ID structure Lee Jones
2014-06-06 23:33 ` Grant Likely [this message]

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