linux-kernel - [PATCH v4 0/2] usb: dwc3: drd: Check graph presence for extcon

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Message-Id: <20201214110741.8512-1-semen.protsenko@linaro.org>
Date:   Mon, 14 Dec 2020 13:07:39 +0200
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        John Stultz <john.stultz@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v4 0/2] usb: dwc3: drd: Check graph presence for extcon

dwc3 shows error message on probe if port node wasn't found in PHY
controller node. But that is actually a valid case for the role switch
mode and OTG mode. This patch series makes sure to hide that error
message and also does a bit of refactoring for that code. Similar patch
(for different subsystem) already exists in kernel tree:
commit ea5bc3b15e0f ("drm/of: Make drm_of_find_panel_or_bridge() to
check graph's presence"), and the whole `of_graph_is_present()' function
was implemented exactly for this kind of situation.

In v2 submission this was a single patch. But in offline discussion with
Andy Shevchenko it was decided it's better to split it into two patches
in order to provide the minimal change for further possible backporting,
and then do all style related changes on top of it in the second patch.

Sam Protsenko (2):
  usb: dwc3: drd: Avoid error when extcon is missing
  usb: dwc3: drd: Improve dwc3_get_extcon() style

 drivers/usb/dwc3/drd.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

-- 
2.29.2