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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
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@@ -1,19 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*******************************************************************************
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   PTP 1588 clock using the STMMAC.
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   Copyright (C) 2013  Vayavya Labs Pvt Ltd
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-  This program is free software; you can redistribute it and/or modify it
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-  under the terms and conditions of the GNU General Public License,
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-  version 2, as published by the Free Software Foundation.
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-
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-  This program is distributed in the hope it will be useful, but WITHOUT
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-  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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-  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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-  more details.
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-
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-  The full GNU General Public License is included in this distribution in
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-  the file called "COPYING".
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   Author: Rayagond Kokatanur <rayagond@vayavyalabs.com>
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 *******************************************************************************/
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@@ -150,6 +140,10 @@
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 	switch (rq->type) {
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 	case PTP_CLK_REQ_PEROUT:
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+		/* Reject requests with unsupported flags */
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+		if (rq->perout.flags)
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+			return -EOPNOTSUPP;
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+
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 		cfg = &priv->pps[rq->perout.index];
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 		cfg->start.tv_sec = rq->perout.start.sec;
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@@ -204,6 +198,9 @@
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 		priv->pps[i].available = true;
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 	}
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+	if (priv->plat->ptp_max_adj)
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+		stmmac_ptp_clock_ops.max_adj = priv->plat->ptp_max_adj;
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+
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 	stmmac_ptp_clock_ops.n_per_out = priv->dma_cap.pps_out_num;
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 	spin_lock_init(&priv->ptp_lock);