enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/arch/arm/mach-imx/cpu-imx31.c
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@@ -1,15 +1,12 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * MX31 CPU type detection
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  *
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  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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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 as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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  */
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 #include <linux/module.h>
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+#include <linux/of_address.h>
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 #include <linux/io.h>
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 #include "common.h"
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@@ -36,10 +33,16 @@
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 static int mx31_read_cpu_rev(void)
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 {
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+	void __iomem *iim_base;
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+	struct device_node *np;
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 	u32 i, srev;
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+	np = of_find_compatible_node(NULL, NULL, "fsl,imx31-iim");
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+	iim_base = of_iomap(np, 0);
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+	BUG_ON(!iim_base);
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+
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 	/* read SREV register from IIM module */
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-	srev = imx_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV));
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+	srev = imx_readl(iim_base + MXC_IIMSREV);
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 	srev &= 0xff;
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 	for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)