From: Denis Kenzior Add a read-only 'endpoint' sysfs entry that contains the qrtr endpoint identifier assigned to this mhi device. Can be used to direct / receive qrtr traffic only from a particular MHI device. Signed-off-by: Denis Kenzior Reviewed-by: Marcel Holtmann Reviewed-by: Andy Gross Signed-off-by: Mihai Moldovan --- v3: - rebase against current master - Link to v2: https://msgid.link/1a49dec96d5c2c5258c9df935d8c9381793d4ddd.1752947108.git.ionic@ionic.de v2: - rebase against current master - use %u formatter instead of %d when printing endpoint id (u32) as per review comment - Link to v1: https://msgid.link/20241018181842.1368394-11-denkenz@gmail.com --- net/qrtr/mhi.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c index 69f53625a049..9a23c888e234 100644 --- a/net/qrtr/mhi.c +++ b/net/qrtr/mhi.c @@ -72,6 +72,16 @@ static int qcom_mhi_qrtr_send(struct qrtr_endpoint *ep, struct sk_buff *skb) return rc; } +static ssize_t endpoint_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct qrtr_mhi_dev *qdev = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", qdev->ep.id); +} + +static DEVICE_ATTR_RO(endpoint); + static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev, const struct mhi_device_id *id) { @@ -91,6 +101,9 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev, if (rc) return rc; + if (device_create_file(&mhi_dev->dev, &dev_attr_endpoint) < 0) + dev_err(qdev->dev, "Failed to create endpoint attribute\n"); + /* start channels */ rc = mhi_prepare_for_transfer_autoqueue(mhi_dev); if (rc) { @@ -107,6 +120,7 @@ static void qcom_mhi_qrtr_remove(struct mhi_device *mhi_dev) { struct qrtr_mhi_dev *qdev = dev_get_drvdata(&mhi_dev->dev); + device_remove_file(&mhi_dev->dev, &dev_attr_endpoint); qrtr_endpoint_unregister(&qdev->ep); mhi_unprepare_from_transfer(mhi_dev); dev_set_drvdata(&mhi_dev->dev, NULL); -- 2.50.0