From: Deepak Kumar Singh <deesin@codeaurora.org>
To: bjorn.andersson@linaro.org, clew@codeaurora.org,
mathieu.poirier@linaro.org
Cc: Deepak Kumar Singh <deesin@codeaurora.org>,
Arun Kumar Neelakantam <aneela@codeaurora.org>,
Andy Gross <agross@kernel.org>, Ohad Ben-Cohen <ohad@wizery.com>,
linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM SUPPORT),
linux-remoteproc@vger.kernel.org (open list:REMOTE PROCESSOR
MESSAGING (RPMSG) SUBSYSTEM),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH V7 3/4] rpmsg: glink: Add support for rpmsg glink chrdev
Date: Wed, 24 Jun 2020 22:15:20 +0530 [thread overview]
Message-ID: <1593017121-7953-4-git-send-email-deesin@codeaurora.org> (raw)
In-Reply-To: <1593017121-7953-1-git-send-email-deesin@codeaurora.org>
RPMSG provides a char device interface to userspace. Probe the rpmsg
chrdev channel to enable the rpmsg_ctrl device creation on glink
transports.
Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
---
drivers/rpmsg/qcom_glink_native.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index d5114ab..3a7f87c 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1574,6 +1574,40 @@ static void qcom_glink_cancel_rx_work(struct qcom_glink *glink)
kfree(dcmd);
}
+static void qcom_glink_device_release(struct device *dev)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ struct glink_channel *channel = to_glink_channel(rpdev->ept);
+
+ /* Release qcom_glink_alloc_channel() reference */
+ kref_put(&channel->refcount, qcom_glink_channel_release);
+ kfree(rpdev);
+}
+
+static int qcom_glink_create_chrdev(struct qcom_glink *glink)
+{
+ struct rpmsg_device *rpdev;
+ struct glink_channel *channel;
+
+ rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL);
+ if (!rpdev)
+ return -ENOMEM;
+
+ channel = qcom_glink_alloc_channel(glink, "rpmsg_chrdev");
+ if (IS_ERR(channel)) {
+ kfree(rpdev);
+ return PTR_ERR(channel);
+ }
+ channel->rpdev = rpdev;
+
+ rpdev->ept = &channel->ept;
+ rpdev->ops = &glink_device_ops;
+ rpdev->dev.parent = glink->dev;
+ rpdev->dev.release = qcom_glink_device_release;
+
+ return rpmsg_chrdev_register_device(rpdev);
+}
+
struct qcom_glink *qcom_glink_native_probe(struct device *dev,
unsigned long features,
struct qcom_glink_pipe *rx,
@@ -1633,6 +1667,10 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
if (ret)
return ERR_PTR(ret);
+ ret = qcom_glink_create_chrdev(glink);
+ if (ret)
+ dev_err(glink->dev, "failed to register chrdev\n");
+
return glink;
}
EXPORT_SYMBOL_GPL(qcom_glink_native_probe);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2020-06-24 16:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1593017121-7953-1-git-send-email-deesin@codeaurora.org>
2020-06-24 16:45 ` [PATCH V7 1/4] rpmsg: glink: Use complete_all for open states Deepak Kumar Singh
2020-09-15 5:00 ` patchwork-bot+linux-remoteproc
2020-06-24 16:45 ` [PATCH V7 2/4] rpmsg: Guard against null endpoint ops in destroy Deepak Kumar Singh
2020-08-07 7:59 ` Greg KH
2020-08-08 0:33 ` Chris Lew
2020-08-08 5:55 ` Greg KH
2020-06-24 16:45 ` Deepak Kumar Singh [this message]
2020-06-24 16:45 ` [PATCH V7 4/4] rpmsg: glink: Expose rpmsg name attr for glink Deepak Kumar Singh
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