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rpmsg: qcom_smd: Add support for "label" property 

Add support for the "label" property, used to give the edge a name other
than the one of the DT node. This allows the implementor to provide
consistently named edges when using the rpmsg character device.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
hifive-unleashed-5.1
Bjorn Andersson 2016-12-02 14:06:02 -08:00
parent 49def18533
commit 5e53c42c33
1 changed files with 22 additions and 0 deletions
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22
drivers/rpmsg/qcom_smd.c
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@ -117,6 +117,8 @@ static const struct {
struct qcom_smd_edge {
struct device dev;
const char *name;
struct device_node *of_node;
unsigned edge_id;
unsigned remote_pid;
@ -1248,6 +1250,10 @@ static int qcom_smd_parse_edge(struct device *dev,
return -EINVAL;
}
ret = of_property_read_string(node, "label", &edge->name);
if (ret < 0)
edge->name = node->name;
irq = irq_of_parse_and_map(node, 0);
if (irq < 0) {
dev_err(dev, "required smd interrupt missing\n");
@ -1285,6 +1291,21 @@ static void qcom_smd_edge_release(struct device *dev)
kfree(edge);
}
static ssize_t rpmsg_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qcom_smd_edge *edge = to_smd_edge(dev);
return sprintf(buf, "%s\n", edge->name);
}
static DEVICE_ATTR_RO(rpmsg_name);
static struct attribute *qcom_smd_edge_attrs[] = {
&dev_attr_rpmsg_name.attr,
NULL
};
ATTRIBUTE_GROUPS(qcom_smd_edge);
/**
* qcom_smd_register_edge() - register an edge based on an device_node
* @parent: parent device for the edge
@ -1306,6 +1327,7 @@ struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
edge->dev.parent = parent;
edge->dev.release = qcom_smd_edge_release;
edge->dev.groups = qcom_smd_edge_groups;
dev_set_name(&edge->dev, "%s:%s", dev_name(parent), node->name);
ret = device_register(&edge->dev);
if (ret) {