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| author | Deepak Kumar Singh <deesin@codeaurora.org> | 2020-06-24 18:45:20 +0200 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-09-15 05:51:07 +0200 |
| commit | 0f579e52472198cec2d3d794a26e277c84e9dbd2 (patch) | |
| tree | 1144a141fade4614724d3e0dcc911b1d4e21fb88 /drivers/rpmsg | |
| parent | rpmsg: Guard against null endpoint ops in destroy (diff) | |
| download | linux-0f579e52472198cec2d3d794a26e277c84e9dbd2.tar.xz linux-0f579e52472198cec2d3d794a26e277c84e9dbd2.zip | |
rpmsg: glink: Add support for rpmsg glink chrdev
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: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Link: https://lore.kernel.org/r/1593017121-7953-4-git-send-email-deesin@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg')
| -rw-r--r-- | drivers/rpmsg/qcom_glink_native.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index d5114abcde19..3a7f87c968e0 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); |