tg3: PTP - Implement the ptp api and ethtool functions
This patch adds the ptp_caps structure, ptp api implementation, reference clock read and register/unregister functions. All the basic clock operations as described in Documentation/ptp/ptp.txt are supported. Frequency adjustment is performed using hardware with a 24 bit accumulator and a programmable correction value. On each clk, the correction value gets added to the accumulator and when it overflows, the time counter is incremented/decremented and the accumulator reset. So conversion from ppb to correction value is ppb * (1 << 24) / 1000000000 [Re-organized to put the ptp_clock_info struct declaration in one patch, added ptp_clock_info.name, and added locking to tg3_ptp_adjtime() based on input from Richard Cochran.] Signed-off-by:Nithin Nayak Sujir <nsujir@broadcom.com> Signed-off-by:
Michael Chan <mchan@broadcom.com> Cc: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
be947307
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