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hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*******************************************************************************
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   This is the driver for the MAC 10/100 on-chip Ethernet controller
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   currently tested on all the ST boards based on STb7109 and stx7200 SoCs.
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@@ -9,17 +10,6 @@
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   Copyright (C) 2007-2009  STMicroelectronics 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: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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 *******************************************************************************/
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@@ -160,6 +150,18 @@
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 	return;
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 }
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+static void dwmac100_set_mac_loopback(void __iomem *ioaddr, bool enable)
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+{
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+	u32 value = readl(ioaddr + MAC_CONTROL);
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+
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+	if (enable)
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+		value |= MAC_CONTROL_OM;
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+	else
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+		value &= ~MAC_CONTROL_OM;
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+
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+	writel(value, ioaddr + MAC_CONTROL);
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+}
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+
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 const struct stmmac_ops dwmac100_ops = {
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 	.core_init = dwmac100_core_init,
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 	.set_mac = stmmac_set_mac,
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@@ -171,6 +173,7 @@
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 	.pmt = dwmac100_pmt,
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 	.set_umac_addr = dwmac100_set_umac_addr,
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 	.get_umac_addr = dwmac100_get_umac_addr,
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+	.set_mac_loopback = dwmac100_set_mac_loopback,
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 };
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 int dwmac100_setup(struct stmmac_priv *priv)