From be9b3174c49109457c490a0ad8976aaeb3df5585 Mon Sep 17 00:00:00 2001 From: Giuseppe CAVALLARO Date: Wed, 12 Oct 2016 15:42:03 +0200 Subject: [PATCH] stmmac: fix ptp init for gmac4 The gmac 4.x version has not extended descriptors (that are available on 3.x instead of). While initializing the PTP module, the advanced PTP was enabled in case of extended descriptors. This cannot be applied for 4.x version where only the hardware capability register has to show if the feature is present. Patch also adds some extra netdev_(debug/inof) to better dump the configuration. Signed-off-by: Giuseppe Cavallaro Cc: Alexandre TORGUE Cc: Rayagond Kokatanur Signed-off-by: David S. Miller --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 4c8c60af7985..e838850cc7c3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -650,20 +650,27 @@ static int stmmac_init_ptp(struct stmmac_priv *priv) if (IS_ERR(priv->clk_ptp_ref)) { priv->clk_ptp_rate = clk_get_rate(priv->stmmac_clk); priv->clk_ptp_ref = NULL; + netdev_dbg(priv->dev, "PTP uses main clock\n"); } else { clk_prepare_enable(priv->clk_ptp_ref); priv->clk_ptp_rate = clk_get_rate(priv->clk_ptp_ref); + netdev_dbg(priv->dev, "PTP rate %d\n", priv->clk_ptp_rate); } priv->adv_ts = 0; - if (priv->dma_cap.atime_stamp && priv->extend_desc) + /* Check if adv_ts can be enabled for dwmac 4.x core */ + if (priv->plat->has_gmac4 && priv->dma_cap.atime_stamp) + priv->adv_ts = 1; + /* Dwmac 3.x core with extend_desc can support adv_ts */ + else if (priv->extend_desc && priv->dma_cap.atime_stamp) priv->adv_ts = 1; - if (netif_msg_hw(priv) && priv->dma_cap.time_stamp) - pr_debug("IEEE 1588-2002 Time Stamp supported\n"); + if (priv->dma_cap.time_stamp) + netdev_info(priv->dev, "IEEE 1588-2002 Timestamp supported\n"); - if (netif_msg_hw(priv) && priv->adv_ts) - pr_debug("IEEE 1588-2008 Advanced Time Stamp supported\n"); + if (priv->adv_ts) + netdev_info(priv->dev, + "IEEE 1588-2008 Advanced Timestamp supported\n"); priv->hw->ptp = &stmmac_ptp; priv->hwts_tx_en = 0; -- 2.20.1