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rpmsg: Move helper for finding rpmsg devices to core

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Extract and move the helper function for finding rpmsg child devices to
the core.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson
2016-09-01 15:28:02 -07:00
parent c9bd6f4220
commit 8b881c07cb
3 changed files with 68 additions and 25 deletions
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33
drivers/rpmsg/rpmsg_core.c
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@@ -22,6 +22,8 @@
#include <linux/kernel.h>
#include <linux/rpmsg.h>
#include "rpmsg_internal.h"
/**
* rpmsg_create_ept() - create a new rpmsg_endpoint
* @rpdev: rpmsg channel device
@@ -229,3 +231,34 @@ int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
return ept->ops->trysend_offchannel(ept, src, dst, data, len);
}
EXPORT_SYMBOL(rpmsg_trysend_offchannel);
/*
* match an rpmsg channel with a channel info struct.
* this is used to make sure we're not creating rpmsg devices for channels
* that already exist.
*/
static int rpmsg_device_match(struct device *dev, void *data)
{
struct rpmsg_channel_info *chinfo = data;
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
if (chinfo->src != RPMSG_ADDR_ANY && chinfo->src != rpdev->src)
return 0;
if (chinfo->dst != RPMSG_ADDR_ANY && chinfo->dst != rpdev->dst)
return 0;
if (strncmp(chinfo->name, rpdev->id.name, RPMSG_NAME_SIZE))
return 0;
/* found a match ! */
return 1;
}
struct device *rpmsg_find_device(struct device *parent,
struct rpmsg_channel_info *chinfo)
{
return device_find_child(parent, chinfo, rpmsg_device_match);
}
EXPORT_SYMBOL(rpmsg_find_device);