From: Andrii Staikov Date: Wed, 8 Mar 2023 10:36:51 +0000 (+0100) Subject: igb: refactor igb_ptp_adjfine_82580 to use diff_by_scaled_ppm X-Git-Tag: v6.6.7~2736^2~263^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d71980d47e270a7dffef4f3541d550cbde686d9a;p=platform%2Fkernel%2Flinux-starfive.git igb: refactor igb_ptp_adjfine_82580 to use diff_by_scaled_ppm Driver's .adjfine interface functions use adjust_by_scaled_ppm and diff_by_scaled_ppm introduced in commit 1060707e3809 ("ptp: introduce helpers to adjust by scaled parts per million") to calculate the required adjustment in a concise manner, but not igb_ptp_adjfine_82580. Fix it by introducing IGB_82580_BASE_PERIOD and changing function logic to use diff_by_scaled_ppm. Signed-off-by: Andrii Staikov Reviewed-by: Jacob Keller Tested-by: Pucha Himasekhar Reddy (A Contingent worker at Intel) Signed-off-by: Tony Nguyen --- diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index 6f471b9..405886e 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -67,6 +67,7 @@ #define INCVALUE_82576_MASK GENMASK(E1000_TIMINCA_16NS_SHIFT - 1, 0) #define INCVALUE_82576 (16u << IGB_82576_TSYNC_SHIFT) #define IGB_NBITS_82580 40 +#define IGB_82580_BASE_PERIOD 0x800000000 static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter); static void igb_ptp_sdp_init(struct igb_adapter *adapter); @@ -209,17 +210,11 @@ static int igb_ptp_adjfine_82580(struct ptp_clock_info *ptp, long scaled_ppm) struct igb_adapter *igb = container_of(ptp, struct igb_adapter, ptp_caps); struct e1000_hw *hw = &igb->hw; - int neg_adj = 0; + bool neg_adj; u64 rate; u32 inca; - if (scaled_ppm < 0) { - neg_adj = 1; - scaled_ppm = -scaled_ppm; - } - rate = scaled_ppm; - rate <<= 13; - rate = div_u64(rate, 15625); + neg_adj = diff_by_scaled_ppm(IGB_82580_BASE_PERIOD, scaled_ppm, &rate); inca = rate & INCVALUE_MASK; if (neg_adj)