projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d27536c6 JL |
1 | /* |
| 2 | * MX25 CPU type detection | |
| 3 | * | |
| 4 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
| 5 | * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | */ | |
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/io.h> | |
| 17c342ae SG |
14 | |
| 15 | #include "iim.h" | |
| 50f2de61 | 16 | #include "hardware.h" |
| d27536c6 JL |
17 | |
| 18 | static int mx25_cpu_rev = -1; | |
| 19 | ||
| 20 | static int mx25_read_cpu_rev(void) | |
| 21 | { | |
| 22 | u32 rev; | |
| 23 | ||
| 24 | rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV)); | |
| 25 | switch (rev) { | |
| 26 | case 0x00: | |
| 27 | return IMX_CHIP_REVISION_1_0; | |
| 28 | case 0x01: | |
| 29 | return IMX_CHIP_REVISION_1_1; | |
| 30 | default: | |
| 31 | return IMX_CHIP_REVISION_UNKNOWN; | |
| 32 | } | |
| 33 | } | |
| 34 | ||
| 35 | int mx25_revision(void) | |
| 36 | { | |
| 37 | if (mx25_cpu_rev == -1) | |
| 38 | mx25_cpu_rev = mx25_read_cpu_rev(); | |
| 39 | ||
| 40 | return mx25_cpu_rev; | |
| 41 | } | |
| 42 | EXPORT_SYMBOL(mx25_revision); |