From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Wen Yang <wenyang@linux.alibaba.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-mediatek@lists.infradead.org,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Bryan O'Donoghue <bryan.odonoghue@linaro.org>,
chenqiwu <chenqiwu@xiaomi.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 5.7 042/388] usb: roles: Switch on role-switch uevent reporting
Date: Wed, 17 Jun 2020 21:02:19 -0400 [thread overview]
Message-ID: <20200618010805.600873-42-sashal@kernel.org> (raw)
In-Reply-To: <20200618010805.600873-1-sashal@kernel.org>
From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
[ Upstream commit 3e63cff384e625f09758ce8f4d01ae3033402b63 ]
Right now we don't report to user-space a role switch when doing a
usb_role_switch_set_role() despite having registered the uevent callbacks.
This patch switches on the notifications allowing user-space to see
role-switch change notifications and subsequently determine the current
controller data-role.
example:
PFX=/devices/platform/soc/78d9000.usb/ci_hdrc.0
root@somebox# udevadm monitor -p
KERNEL[49.894994] change $PFX/usb_role/ci_hdrc.0-role-switch (usb_role)
ACTION=change
DEVPATH=$PFX/usb_role/ci_hdrc.0-role-switch
SUBSYSTEM=usb_role
DEVTYPE=usb_role_switch
USB_ROLE_SWITCH=ci_hdrc.0-role-switch
SEQNUM=2432
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Wen Yang <wenyang@linux.alibaba.com>
Cc: chenqiwu <chenqiwu@xiaomi.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20200508162937.2566818-1-bryan.odonoghue@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/roles/class.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c
index 5b17709821df..27d92af29635 100644
--- a/drivers/usb/roles/class.c
+++ b/drivers/usb/roles/class.c
@@ -49,8 +49,10 @@ int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role)
mutex_lock(&sw->lock);
ret = sw->set(sw, role);
- if (!ret)
+ if (!ret) {
sw->role = role;
+ kobject_uevent(&sw->dev.kobj, KOBJ_CHANGE);
+ }
mutex_unlock(&sw->lock);
--
2.25.1
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek
next parent reply other threads:[~2020-06-18 1:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200618010805.600873-1-sashal@kernel.org>
2020-06-18 1:02 ` Sasha Levin [this message]
2020-06-18 1:02 ` [PATCH AUTOSEL 5.7 043/388] serial: 8250: Fix max baud limit in generic 8250 port Sasha Levin
2020-06-18 1:03 ` [PATCH AUTOSEL 5.7 118/388] staging: mt7621-pci: fix PCIe interrupt mapping Sasha Levin
2020-06-18 1:03 ` [PATCH AUTOSEL 5.7 119/388] arm64: dts: mt8173: fix unit name warnings Sasha Levin
2020-06-18 1:04 ` [PATCH AUTOSEL 5.7 184/388] remoteproc/mediatek: fix invalid use of sizeof in scp_ipi_init() Sasha Levin
2020-06-18 1:06 ` [PATCH AUTOSEL 5.7 321/388] scsi: ufs: Don't update urgent bkops level when toggling auto bkops Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200618010805.600873-42-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=alexandre.belloni@bootlin.com \
--cc=bryan.odonoghue@linaro.org \
--cc=chenqiwu@xiaomi.com \
--cc=chunfeng.yun@mediatek.com \
--cc=gregkh@linuxfoundation.org \
--cc=heikki.krogerus@linux.intel.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-usb@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=suzuki.poulose@arm.com \
--cc=wenyang@linux.alibaba.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).