mirror of https://gitee.com/openkylin/linux.git
44 lines
927 B
C
44 lines
927 B
C
/*
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* MX35 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/io.h>
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#include "hardware.h"
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#include "iim.h"
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static int mx35_cpu_rev = -1;
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static int mx35_read_cpu_rev(void)
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{
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u32 rev;
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rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
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switch (rev) {
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case 0x00:
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return IMX_CHIP_REVISION_1_0;
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case 0x10:
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return IMX_CHIP_REVISION_2_0;
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case 0x11:
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return IMX_CHIP_REVISION_2_1;
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default:
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return IMX_CHIP_REVISION_UNKNOWN;
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}
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}
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int mx35_revision(void)
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{
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if (mx35_cpu_rev == -1)
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mx35_cpu_rev = mx35_read_cpu_rev();
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return mx35_cpu_rev;
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}
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EXPORT_SYMBOL(mx35_revision);
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