/*
* 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);