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Date:   Fri, 8 Sep 2017 17:54:03 +0200
From:   Peter Rosin <>
To:     Hans de Goede <>
Cc:     Stephen Boyd <>,
        MyungJoo Ham <>,
        Chanwoo Choi <>,
        Guenter Roeck <>,
        Heikki Krogerus <>,
        Darren Hart <>,
        Andy Shevchenko <>,
        Mathias Nyman <>,,,,
        Kuppuswamy Sathyanarayanan 
        Sathyanarayanan Kuppuswamy Natarajan <>,
        Greg Kroah-Hartman <>,
Subject: Re: [PATCH 1/2] mux: add mux_control_get_optional() API

On 2017-09-08 17:45, Peter Rosin wrote:
> From: Stephen Boyd <>
> Sometimes drivers only use muxes under certain scenarios. For
> example, the chipidea usb controller may be connected to a usb
> switch on some platforms, and connected directly to a usb port on
> others. The driver won't know one way or the other though, so add
> a mux_control_get_optional() API that allows the driver to
> differentiate errors getting the mux from there not being a mux
> for the driver to use at all.
> ---
>  Documentation/driver-model/devres.txt |   1 +
>  drivers/mux/core.c                    | 104 +++++++++++++++++++++++++++-------
>  include/linux/mux/consumer.h          |   4 ++
>  3 files changed, 89 insertions(+), 20 deletions(-)
> I haven't tested this patch, and hence I have not signed it and I also
> removed the sign-off from Stephen...

Huh, I definitely intended to mention that this patch is based on [1]
from Stephen, but that I've made changes according to the comments in
that thread (and more). And those changes are what made me remove the
sign-off from Stephen...

Sorry for the noise,


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