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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
// 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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#include <linux/module.h>
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#include <linux/io.h>
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#include "common.h"
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#include "hardware.h"
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#include "iim.h"
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static int mx31_cpu_rev = -1;
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static struct {
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u8 srev;
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const char *name;
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unsigned int rev;
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} mx31_cpu_type[] = {
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{ .srev = 0x00, .name = "i.MX31(L)", .rev = IMX_CHIP_REVISION_1_0 },
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{ .srev = 0x10, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
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{ .srev = 0x11, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
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{ .srev = 0x12, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
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{ .srev = 0x13, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
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{ .srev = 0x14, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_2 },
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{ .srev = 0x15, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_2 },
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{ .srev = 0x28, .name = "i.MX31", .rev = IMX_CHIP_REVISION_2_0 },
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{ .srev = 0x29, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_2_0 },
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};
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static int mx31_read_cpu_rev(void)
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{
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u32 i, srev;
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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 &= 0xff;
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for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)
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if (srev == mx31_cpu_type[i].srev) {
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imx_print_silicon_rev(mx31_cpu_type[i].name,
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mx31_cpu_type[i].rev);
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return mx31_cpu_type[i].rev;
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}
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imx_print_silicon_rev("i.MX31", IMX_CHIP_REVISION_UNKNOWN);
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return IMX_CHIP_REVISION_UNKNOWN;
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}
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int mx31_revision(void)
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{
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if (mx31_cpu_rev == -1)
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mx31_cpu_rev = mx31_read_cpu_rev();
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return mx31_cpu_rev;
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}
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EXPORT_SYMBOL(mx31_revision);
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