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ethtool: add a new command for getting PHC virtual clocks

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Add an interface for getting PHC (PTP Hardware Clock)
virtual clocks, which are based on PHC physical clock
providing hardware timestamp to network packets.

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 16:11:56 +08:00
committed by David S. Miller
parent acb288e804
commit c156174a67
8 changed files with 167 additions and 1 deletions
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10
include/linux/ethtool.h
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@@ -757,6 +757,16 @@ void
ethtool_params_from_link_mode(struct ethtool_link_ksettings *link_ksettings,
enum ethtool_link_mode_bit_indices link_mode);
/**
* ethtool_get_phc_vclocks - Derive phc vclocks information, and caller
* is responsible to free memory of vclock_index
* @dev: pointer to net_device structure
* @vclock_index: pointer to pointer of vclock index
*
* Return number of phc vclocks
*/
int ethtool_get_phc_vclocks(struct net_device *dev, int **vclock_index);
/**
* ethtool_sprintf - Write formatted string to ethtool string data
* @data: Pointer to start of string to update