add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/ethernet/cadence/macb_ptp.c
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@@ -1,22 +1,11 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /**
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  * 1588 PTP support for Cadence GEM device.
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  *
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- * Copyright (C) 2017 Cadence Design Systems - http://www.cadence.com
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+ * Copyright (C) 2017 Cadence Design Systems - https://www.cadence.com
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  *
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  * Authors: Rafal Ozieblo <rafalo@cadence.com>
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  *          Bartosz Folta <bfolta@cadence.com>
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- *
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- * This program is free software: you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2  of
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- * the License as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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  */
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 #include <linux/kernel.h>
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 #include <linux/types.h>
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@@ -149,7 +138,7 @@
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 	 * (temp / USEC_PER_SEC) + 0.5
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 	 */
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 	adj += (USEC_PER_SEC >> 1);
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-	adj >>= GEM_SUBNSINCR_SIZE; /* remove fractions */
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+	adj >>= PPM_FRACTION; /* remove fractions */
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 	adj = div_u64(adj, USEC_PER_SEC);
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 	adj = neg_adj ? (word - adj) : (word + adj);
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@@ -480,7 +469,7 @@
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 	case HWTSTAMP_TX_ONESTEP_SYNC:
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 		if (gem_ptp_set_one_step_sync(bp, 1) != 0)
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 			return -ERANGE;
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-		/* fall through */
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+		fallthrough;
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 	case HWTSTAMP_TX_ON:
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 		tx_bd_control = TSTAMP_ALL_FRAMES;
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 		break;