Re: [PATCH 3/3] i2c: Export i2c_init_adapter() for use by drivers in early initialisation
From: Wolfram Sang
Date: Tue Aug 23 2016 - 17:33:16 EST
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@xxxxxxxxxxxxxxxxxx>
> Cc: Ville SyrjÃlà <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
> Cc: linux-i2c@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Do you have a patch for some i2c driver making use of this change?
Attachment:
signature.asc
Description: PGP signature