2 * MX31 CPU type detection
4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/module.h>
14 #include <mach/hardware.h>
17 unsigned int mx31_cpu_rev;
18 EXPORT_SYMBOL(mx31_cpu_rev);
25 } mx31_cpu_type[] __initdata = {
26 { .srev = 0x00, .name = "i.MX31(L)", .v = "1.0", .rev = IMX_CHIP_REVISION_1_0 },
27 { .srev = 0x10, .name = "i.MX31", .v = "1.1", .rev = IMX_CHIP_REVISION_1_1 },
28 { .srev = 0x11, .name = "i.MX31L", .v = "1.1", .rev = IMX_CHIP_REVISION_1_1 },
29 { .srev = 0x12, .name = "i.MX31", .v = "1.15", .rev = IMX_CHIP_REVISION_1_1 },
30 { .srev = 0x13, .name = "i.MX31L", .v = "1.15", .rev = IMX_CHIP_REVISION_1_1 },
31 { .srev = 0x14, .name = "i.MX31", .v = "1.2", .rev = IMX_CHIP_REVISION_1_2 },
32 { .srev = 0x15, .name = "i.MX31L", .v = "1.2", .rev = IMX_CHIP_REVISION_1_2 },
33 { .srev = 0x28, .name = "i.MX31", .v = "2.0", .rev = IMX_CHIP_REVISION_2_0 },
34 { .srev = 0x29, .name = "i.MX31L", .v = "2.0", .rev = IMX_CHIP_REVISION_2_0 },
37 void __init mx31_read_cpu_rev(void)
41 /* read SREV register from IIM module */
42 srev = __raw_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV));
44 for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)
45 if (srev == mx31_cpu_type[i].srev) {
47 "CPU identified as %s, silicon rev %s\n",
48 mx31_cpu_type[i].name, mx31_cpu_type[i].v);
50 mx31_cpu_rev = mx31_cpu_type[i].rev;
54 mx31_cpu_rev = IMX_CHIP_REVISION_UNKNOWN;
56 printk(KERN_WARNING "Unknown CPU identifier. srev = %02x\n", srev);