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ptp: add kernel API ptp_get_vclocks_index()

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Add kernel API ptp_get_vclocks_index() to get all ptp
vclocks index on pclock.

This is preparation for supporting ptp vclocks info query
through ethtool.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yangbo Lu
2021-06-30 16:11:55 +08:00
committed by David S. Miller
parent 44c494c8e3
commit acb288e804
4 changed files with 53 additions and 1 deletions
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14
include/linux/ptp_clock_kernel.h
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@@ -306,6 +306,18 @@ int ptp_schedule_worker(struct ptp_clock *ptp, unsigned long delay);
*/
void ptp_cancel_worker_sync(struct ptp_clock *ptp);
/**
* ptp_get_vclocks_index() - get all vclocks index on pclock, and
* caller is responsible to free memory
* of vclock_index
*
* @pclock_index: phc index of ptp pclock.
* @vclock_index: pointer to pointer of vclock index.
*
* return number of vclocks.
*/
int ptp_get_vclocks_index(int pclock_index, int **vclock_index);
#else
static inline struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
struct device *parent)
@@ -325,6 +337,8 @@ static inline int ptp_schedule_worker(struct ptp_clock *ptp,
{ return -EOPNOTSUPP; }
static inline void ptp_cancel_worker_sync(struct ptp_clock *ptp)
{ }
static inline int ptp_get_vclocks_index(int pclock_index, int **vclock_index)
{ return 0; }
#endif