This source file includes following definitions.
- mx31_read_cpu_rev
- mx31_revision
1
2
3
4
5
6
7
8 #include <linux/module.h>
9 #include <linux/io.h>
10
11 #include "common.h"
12 #include "hardware.h"
13 #include "iim.h"
14
15 static int mx31_cpu_rev = -1;
16
17 static struct {
18 u8 srev;
19 const char *name;
20 unsigned int rev;
21 } mx31_cpu_type[] = {
22 { .srev = 0x00, .name = "i.MX31(L)", .rev = IMX_CHIP_REVISION_1_0 },
23 { .srev = 0x10, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
24 { .srev = 0x11, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
25 { .srev = 0x12, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
26 { .srev = 0x13, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
27 { .srev = 0x14, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_2 },
28 { .srev = 0x15, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_2 },
29 { .srev = 0x28, .name = "i.MX31", .rev = IMX_CHIP_REVISION_2_0 },
30 { .srev = 0x29, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_2_0 },
31 };
32
33 static int mx31_read_cpu_rev(void)
34 {
35 u32 i, srev;
36
37
38 srev = imx_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV));
39 srev &= 0xff;
40
41 for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)
42 if (srev == mx31_cpu_type[i].srev) {
43 imx_print_silicon_rev(mx31_cpu_type[i].name,
44 mx31_cpu_type[i].rev);
45 return mx31_cpu_type[i].rev;
46 }
47
48 imx_print_silicon_rev("i.MX31", IMX_CHIP_REVISION_UNKNOWN);
49 return IMX_CHIP_REVISION_UNKNOWN;
50 }
51
52 int mx31_revision(void)
53 {
54 if (mx31_cpu_rev == -1)
55 mx31_cpu_rev = mx31_read_cpu_rev();
56
57 return mx31_cpu_rev;
58 }
59 EXPORT_SYMBOL(mx31_revision);