1/*
 2 * MX35 CPU type detection
 3 *
 4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 5 *
 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.
10 */
11#include <linux/module.h>
12#include <linux/io.h>
13#include <mach/hardware.h>
14#include <mach/iim.h>
 
15
16static int mx35_cpu_rev = -1;
17
18static int mx35_read_cpu_rev(void)
19{
20	u32 rev;
21
22	rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
23	switch (rev) {
24	case 0x00:
25		return IMX_CHIP_REVISION_1_0;
26	case 0x10:
27		return IMX_CHIP_REVISION_2_0;
28	case 0x11:
29		return IMX_CHIP_REVISION_2_1;
30	default:
31		return IMX_CHIP_REVISION_UNKNOWN;
32	}
33}
34
35int mx35_revision(void)
36{
37	if (mx35_cpu_rev == -1)
38		mx35_cpu_rev = mx35_read_cpu_rev();
39
40	return mx35_cpu_rev;
41}
42EXPORT_SYMBOL(mx35_revision);

 1/*
 2 * MX35 CPU type detection
 3 *
 4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 5 *
 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.
10 */
11#include <linux/module.h>
12#include <linux/io.h>
13
14#include "hardware.h"
15#include "iim.h"
16
17static int mx35_cpu_rev = -1;
18
19static int mx35_read_cpu_rev(void)
20{
21	u32 rev;
22
23	rev = imx_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
24	switch (rev) {
25	case 0x00:
26		return IMX_CHIP_REVISION_1_0;
27	case 0x10:
28		return IMX_CHIP_REVISION_2_0;
29	case 0x11:
30		return IMX_CHIP_REVISION_2_1;
31	default:
32		return IMX_CHIP_REVISION_UNKNOWN;
33	}
34}
35
36int mx35_revision(void)
37{
38	if (mx35_cpu_rev == -1)
39		mx35_cpu_rev = mx35_read_cpu_rev();
40
41	return mx35_cpu_rev;
42}
43EXPORT_SYMBOL(mx35_revision);