netdev - [PATCH v4 net-next 6/9] net: stmmac: Add PTP support for XGMAC2

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Date:   Wed,  8 Aug 2018 09:04:34 +0100
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     netdev@...r.kernel.org
Cc:     Jose Abreu <Jose.Abreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>
Subject: [PATCH v4 net-next 6/9] net: stmmac: Add PTP support for XGMAC2

XGMAC2 uses the same engine of timestamping as GMAC4. Let's use the same
callbacks.

Signed-off-by: Jose Abreu <joabreu@...opsys.com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Joao Pinto <jpinto@...opsys.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
---
 drivers/net/ethernet/stmicro/stmmac/hwif.c       | 4 ++--
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | 6 ++++--
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h | 1 +
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 4b4ba1c8bad5..357309a6d6a5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -193,13 +193,13 @@ static const struct stmmac_hwif_entry {
 		.xgmac = true,
 		.min_id = DWXGMAC_CORE_2_10,
 		.regs = {
-			.ptp_off = 0,
+			.ptp_off = PTP_XGMAC_OFFSET,
 			.mmc_off = 0,
 		},
 		.desc = &dwxgmac210_desc_ops,
 		.dma = &dwxgmac210_dma_ops,
 		.mac = &dwxgmac210_ops,
-		.hwtimestamp = NULL,
+		.hwtimestamp = &stmmac_ptp,
 		.mode = NULL,
 		.tc = NULL,
 		.setup = dwxgmac2_setup,
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
index 0cb0e39a2be9..2293e21f789f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
@@ -71,6 +71,9 @@ static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
 	u32 sec, nsec;
 	u32 quotient, reminder;
 	int neg_adj = 0;
+	bool xmac;
+
+	xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac;
 
 	if (delta < 0) {
 		neg_adj = 1;
@@ -82,8 +85,7 @@ static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
 	nsec = reminder;
 
 	spin_lock_irqsave(&priv->ptp_lock, flags);
-	stmmac_adjust_systime(priv, priv->ptpaddr, sec, nsec, neg_adj,
-			priv->plat->has_gmac4);
+	stmmac_adjust_systime(priv, priv->ptpaddr, sec, nsec, neg_adj, xmac);
 	spin_unlock_irqrestore(&priv->ptp_lock, flags);
 
 	return 0;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
index f4b31d69f60e..ecccf895fd7e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
@@ -21,6 +21,7 @@
 #ifndef	__STMMAC_PTP_H__
 #define	__STMMAC_PTP_H__
 
+#define PTP_XGMAC_OFFSET	0xd00
 #define	PTP_GMAC4_OFFSET	0xb00
 #define	PTP_GMAC3_X_OFFSET	0x700
 
-- 
2.7.4