diff options
| author | Jacob Keller <jacob.e.keller@intel.com> | 2022-11-09 15:09:39 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-11 10:58:39 +0000 |
| commit | e3f18e9d353aa8bd9e4db10acab21df380e212f5 (patch) | |
| tree | 5b60132139cd464dac93517e55996741c8e08327 /drivers/net/ethernet/broadcom | |
| parent | 319d77e9d059d4e7b0aba923578faed038d9038c (diff) | |
| download | linux-e3f18e9d353aa8bd9e4db10acab21df380e212f5.tar.bz2 | |
ptp: tg3: convert .adjfreq to .adjfine
The tg3 implementation of .adjfreq is implemented in terms of a
straight forward "base * ppb / 1 billion" calculation.
Convert this to the newer .adjfine, using the recently added
diff_by_scaled_ppm helper function to calculate the difference and
direction of the adjustment.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Siva Reddy Kallam <siva.kallam@broadcom.com>
Cc: Prashant Sreedharan <prashant@broadcom.com>
Cc: Michael Chan <mchan@broadcom.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.c | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 4179a12fc881..59debdc344a5 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -6179,34 +6179,26 @@ static int tg3_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) return 0; } -static int tg3_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) +static int tg3_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) { struct tg3 *tp = container_of(ptp, struct tg3, ptp_info); - bool neg_adj = false; - u32 correction = 0; - - if (ppb < 0) { - neg_adj = true; - ppb = -ppb; - } + u64 correction; + bool neg_adj; /* 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. - * - * So conversion from ppb to correction value is - * ppb * (1 << 24) / 1000000000 */ - correction = div_u64((u64)ppb * (1 << 24), 1000000000ULL) & - TG3_EAV_REF_CLK_CORRECT_MASK; + neg_adj = diff_by_scaled_ppm(1 << 24, scaled_ppm, &correction); tg3_full_lock(tp, 0); if (correction) tw32(TG3_EAV_REF_CLK_CORRECT_CTL, TG3_EAV_REF_CLK_CORRECT_EN | - (neg_adj ? TG3_EAV_REF_CLK_CORRECT_NEG : 0) | correction); + (neg_adj ? TG3_EAV_REF_CLK_CORRECT_NEG : 0) | + ((u32)correction & TG3_EAV_REF_CLK_CORRECT_MASK)); else tw32(TG3_EAV_REF_CLK_CORRECT_CTL, 0); @@ -6330,7 +6322,7 @@ static const struct ptp_clock_info tg3_ptp_caps = { .n_per_out = 1, .n_pins = 0, .pps = 0, - .adjfreq = tg3_ptp_adjfreq, + .adjfine = tg3_ptp_adjfine, .adjtime = tg3_ptp_adjtime, .gettimex64 = tg3_ptp_gettimex, .settime64 = tg3_ptp_settime, |