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author | Arnd Bergmann <arnd@arndb.de> | 2011-11-01 17:12:22 +0100 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2011-11-01 17:12:22 +0100 |
commit | c72dbae971400e466ad9ff16c920cd6d9d8c55a1 (patch) | |
tree | 7a0ebba8b14d889a8b42edfa1272be222b908a82 /arch/arm/mach-imx/cpu-imx25.c | |
parent | ARM: gic: use module.h instead of export.h (diff) | |
parent | Merge branch 'imx-features-for-arnd' of git://git.pengutronix.de/git/imx/linu... (diff) | |
download | linux-c72dbae971400e466ad9ff16c920cd6d9d8c55a1.tar.gz linux-c72dbae971400e466ad9ff16c920cd6d9d8c55a1.tar.bz2 linux-c72dbae971400e466ad9ff16c920cd6d9d8c55a1.zip |
Merge branch 'imx/devel' into next/dt
The board changes in the imx/devel branch conflict with other changes in
the device imx/dt branch.
Conflicts:
arch/arm/mach-mx5/board-mx53_loco.c
arch/arm/mach-mx5/board-mx53_smd.c
arch/arm/plat-mxc/include/mach/common.h
arch/arm/plat-mxc/include/mach/memory.h
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx25.c')
-rw-r--r-- | arch/arm/mach-imx/cpu-imx25.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c new file mode 100644 index 000000000000..6914bcbf84e4 --- /dev/null +++ b/arch/arm/mach-imx/cpu-imx25.c @@ -0,0 +1,41 @@ +/* + * MX25 CPU type detection + * + * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> + * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved + * + * 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. + */ +#include <linux/module.h> +#include <linux/io.h> +#include <mach/hardware.h> +#include <mach/iim.h> + +static int mx25_cpu_rev = -1; + +static int mx25_read_cpu_rev(void) +{ + u32 rev; + + rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV)); + switch (rev) { + case 0x00: + return IMX_CHIP_REVISION_1_0; + case 0x01: + return IMX_CHIP_REVISION_1_1; + default: + return IMX_CHIP_REVISION_UNKNOWN; + } +} + +int mx25_revision(void) +{ + if (mx25_cpu_rev == -1) + mx25_cpu_rev = mx25_read_cpu_rev(); + + return mx25_cpu_rev; +} +EXPORT_SYMBOL(mx25_revision); |