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can: add helper function to get CAN bus state

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Add a helper function to get the CAN bus state.

Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
This commit is contained in:
Benedikt Spranger 2013-01-25 16:50:32 +01:00 • committed by Thomas Graf
parent 4cb375a812
commit 6cc5fdc0e9
2 changed files with 20 additions and 0 deletions
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1
include/netlink/route/link/can.h
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@ -27,6 +27,7 @@ extern int rtnl_link_can_str2ctrlmode(const char *);
extern int rtnl_link_can_restart(struct rtnl_link *);
extern int rtnl_link_can_freq(struct rtnl_link *, uint32_t *);
extern int rtnl_link_can_state(struct rtnl_link *, uint32_t *);
extern int rtnl_link_can_berr_rx(struct rtnl_link *);
extern int rtnl_link_can_berr_tx(struct rtnl_link *);

19
lib/route/link/can.c
View file

@ -404,6 +404,25 @@ int rtnl_link_can_freq(struct rtnl_link *link, uint32_t *freq)
return 0;
}
/**
* Get CAN state
* @arg link Link object
* @arg state CAN bus state
* @return 0 on success or a negative error code
*/
int rtnl_link_can_state(struct rtnl_link *link, uint32_t *state)
{
struct can_info *ci = link->l_info;
IS_CAN_LINK_ASSERT(link);
if (!state)
return -NLE_INVAL;
*state = ci->ci_state;
return 0;
}
/**
* Get CAN RX bus error count
* @arg link Link object