linux-kernel - Re: [PATCH 3/3] i2c: Export i2c_init_adapter() for use by drivers in early initialisation

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Date:   Tue, 23 Aug 2016 23:33:09 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Chris Wilson <chris@...is-wilson.co.uk>
Cc:     linux-i2c@...r.kernel.org,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 3/3] i2c: Export i2c_init_adapter() for use by drivers in
 early initialisation

On Thu, Jun 09, 2016 at 09:53:55AM +0100, Chris Wilson wrote:
> Some drivers require use of their i2c adapter long before they can add
> the adapter to userspace (i.e. before they establish and expose their
> objects in the sysfs kobject tree). Currently i2c_add_adapter()
> registers the adapter with userspace, which causes a conflict in the
> ordering of the driver's initialisation. Exporting i2c_init_adapter()
> allows for the i2c adapter to be used early in the initialisation in
> order to detect whether the device the adapter is attached to is even
> present. The drivers still need to call i2c_add_adapter() (or
> i2c_add_number_adapter()) as per normal to complete their registration.
> 
> Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
> Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> Cc: Wolfram Sang <wsa@...-dreams.de>
> Cc: linux-i2c@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: dri-devel@...ts.freedesktop.org

Do you have a patch for some i2c driver making use of this change?


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