Re: 4.14/4.18: Please add "eeprom: at24: Add support for address-width property"

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On Wed, Oct 31, 2018 at 10:49:59PM +0200, Adrian Bunk wrote:
On Wed, Oct 31, 2018 at 10:27:45AM -0400, Sasha Levin wrote:
On Mon, Oct 22, 2018 at 11:38:35AM +0300, Adrian Bunk wrote:
> Please cherry-pick the following commit to 4.14 and 4.18:
>
>    commit a2b3bf4846e5eed62ea6abb096af2c950961033c
>    Author: Alan Chiang <alanx.chiang@xxxxxxxxx>
>    Date:   Wed Jul 25 11:20:22 2018 +0800
>
>    eeprom: at24: Add support for address-width property
>
>    Provide a flexible way to determine the addressing bits of eeprom.
>    Pass the addressing bits to driver through address-width property.
>
>    Signed-off-by: Alan Chiang <alanx.chiang@xxxxxxxxx>
>    Signed-off-by: Andy Yeh <andy.yeh@xxxxxxxxx>
>    Signed-off-by: Bartosz Golaszewski <brgl@xxxxxxxx>
>
>
> Confirmed to work on 4.14 with the Identification Page
> of an ST M24M02-DR (256 bytes but 16 bit addressing).

This patch doesn't look like stable material. The hardware never worked
before, so this is not a regression and falls under new hardware
enablement, but the patch is more complex than what we usually allow for
hardware enablement (adding various IDs/quirks/etc).

Am I missing something?

IMHO it is a pretty straightforward quirk for hardware enablement.

Note that the quirk will only be used if explicitely enabled in the
device tree, for everyone else this code is a nop.

Fair enough. I've queued it for 4.18 and 4.14.

--
Thanks,
Sasha



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