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>
14
15#include "iim.h"
16#include "hardware.h"
17
18static int mx25_cpu_rev = -1;
19
20static 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
35int 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}
42EXPORT_SYMBOL(mx25_revision);

 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>
14#include <mach/hardware.h>
15#include <mach/iim.h>
 
16
17static int mx25_cpu_rev = -1;
18
19static int mx25_read_cpu_rev(void)
20{
21	u32 rev;
22
23	rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV));
24	switch (rev) {
25	case 0x00:
26		return IMX_CHIP_REVISION_1_0;
27	case 0x01:
28		return IMX_CHIP_REVISION_1_1;
29	default:
30		return IMX_CHIP_REVISION_UNKNOWN;
31	}
32}
33
34int mx25_revision(void)
35{
36	if (mx25_cpu_rev == -1)
37		mx25_cpu_rev = mx25_read_cpu_rev();
38
39	return mx25_cpu_rev;
40}
41EXPORT_SYMBOL(mx25_revision);