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Message-ID: <1378187707-17928-1-git-send-email-sonic.adi@gmail.com> Date: Tue, 3 Sep 2013 13:55:07 +0800 From: Sonic Zhang <sonic.adi@...il.com> To: Giuseppe Cavallaro <peppe.cavallaro@...com>, <netdev@...r.kernel.org> CC: <adi-buildroot-devel@...ts.sourceforge.net>, Sonic Zhang <sonic.zhang@...log.com> Subject: [PATCH] driver:stmmac: Adjust time stamp increase for 0.465 ns accurate only when Time stamp binary rollover is set. From: Sonic Zhang <sonic.zhang@...log.com> The synopsys spec says When TSCRLSSR is cleard, the rollover value of sub-second register is 0x7FFFFFFF(0.465 ns per clock). Signed-off-by: Sonic Zhang <sonic.zhang@...log.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c index def7e75..76ad214 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c @@ -45,8 +45,8 @@ static void stmmac_config_sub_second_increment(void __iomem *ioaddr) data = (1000000000ULL / 50000000); /* 0.465ns accuracy */ - if (value & PTP_TCR_TSCTRLSSR) - data = (data * 100) / 465; + if (!(value & PTP_TCR_TSCTRLSSR)) + data = (data * 1000) / 465; writel(data, ioaddr + PTP_SSIR); } -- 1.8.2.3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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