diff options
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx35.c')
| -rw-r--r-- | arch/arm/mach-imx/cpu-imx35.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/cpu-imx35.c b/arch/arm/mach-imx/cpu-imx35.c new file mode 100644 index 000000000..ec3aaa098 --- /dev/null +++ b/arch/arm/mach-imx/cpu-imx35.c @@ -0,0 +1,43 @@ +/* + * MX35 CPU type detection + * + * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> + * + * 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 "hardware.h" +#include "iim.h" + +static int mx35_cpu_rev = -1; + +static int mx35_read_cpu_rev(void) +{ + u32 rev; + + rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV)); + switch (rev) { + case 0x00: + return IMX_CHIP_REVISION_1_0; + case 0x10: + return IMX_CHIP_REVISION_2_0; + case 0x11: + return IMX_CHIP_REVISION_2_1; + default: + return IMX_CHIP_REVISION_UNKNOWN; + } +} + +int mx35_revision(void) +{ + if (mx35_cpu_rev == -1) + mx35_cpu_rev = mx35_read_cpu_rev(); + + return mx35_cpu_rev; +} +EXPORT_SYMBOL(mx35_revision); |