diff options
author | Juergen Beisert <j.beisert@pengutronix.de> | 2008-07-05 04:02:59 -0400 |
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committer | Robert Schwebel <r.schwebel@pengutronix.de> | 2008-07-05 04:02:59 -0400 |
commit | f31405cc4cc568baad28273c7f45b0563b57a17d (patch) | |
tree | 0ba94cea0e4df5d8a21f6430301cc291624a4417 /arch/arm | |
parent | 604cbadce2292d979749e2f5c6c3f75ee10f4c9e (diff) |
i.MX27 CPU: Add basic i.MX27 CPU support
Add basic i.MX27 CPU support
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/mach-mx2/Kconfig | 6 | ||||
-rw-r--r-- | arch/arm/mach-mx2/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/mach-mx2/cpu_imx27.c | 63 |
3 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mach-mx2/Kconfig b/arch/arm/mach-mx2/Kconfig index 23def05fea0e..6e7d724e323e 100644 --- a/arch/arm/mach-mx2/Kconfig +++ b/arch/arm/mach-mx2/Kconfig | |||
@@ -1,5 +1,11 @@ | |||
1 | comment "MX2 family CPU support" | 1 | comment "MX2 family CPU support" |
2 | depends on ARCH_MX2 | 2 | depends on ARCH_MX2 |
3 | 3 | ||
4 | config MACH_MX27 | ||
5 | bool "i.MX27 support" | ||
6 | depends on ARCH_MX2 | ||
7 | help | ||
8 | This enables support for Freescale's MX2 based i.MX27 processor. | ||
9 | |||
4 | comment "MX2 Platforms" | 10 | comment "MX2 Platforms" |
5 | depends on ARCH_MX2 | 11 | depends on ARCH_MX2 |
diff --git a/arch/arm/mach-mx2/Makefile b/arch/arm/mach-mx2/Makefile index f8f8ecb01c97..c9eac3b1e139 100644 --- a/arch/arm/mach-mx2/Makefile +++ b/arch/arm/mach-mx2/Makefile | |||
@@ -5,3 +5,5 @@ | |||
5 | # Object file lists. | 5 | # Object file lists. |
6 | 6 | ||
7 | obj-y := system.o generic.o devices.o serial.o | 7 | obj-y := system.o generic.o devices.o serial.o |
8 | |||
9 | obj-$(CONFIG_MACH_MX27) += cpu_imx27.o | ||
diff --git a/arch/arm/mach-mx2/cpu_imx27.c b/arch/arm/mach-mx2/cpu_imx27.c new file mode 100644 index 000000000000..d6b5c2e3377f --- /dev/null +++ b/arch/arm/mach-mx2/cpu_imx27.c | |||
@@ -0,0 +1,63 @@ | |||
1 | /* | ||
2 | * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved. | ||
3 | * Copyright 2008 Juergen Beisert, kernel@pengutronix.de | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or | ||
6 | * modify it under the terms of the GNU General Public License | ||
7 | * as published by the Free Software Foundation; either version 2 | ||
8 | * of the License, or (at your option) any later version. | ||
9 | * This program is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | * GNU General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU General Public License | ||
15 | * along with this program; if not, write to the Free Software | ||
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | ||
17 | * MA 02110-1301, USA. | ||
18 | */ | ||
19 | |||
20 | /* | ||
21 | * i.MX27 specific CPU detection code | ||
22 | */ | ||
23 | |||
24 | #include <linux/io.h> | ||
25 | #include <linux/module.h> | ||
26 | |||
27 | #include <asm/hardware.h> | ||
28 | |||
29 | #include "crm_regs.h" | ||
30 | |||
31 | static int cpu_silicon_rev = -1; | ||
32 | static int cpu_partnumber; | ||
33 | |||
34 | static void query_silicon_parameter(void) | ||
35 | { | ||
36 | u32 val; | ||
37 | /* | ||
38 | * now we have access to the IO registers. As we need | ||
39 | * the silicon revision very early we read it here to | ||
40 | * avoid any further hooks | ||
41 | */ | ||
42 | val = __raw_readl(IO_ADDRESS(SYSCTRL_BASE_ADDR) + SYS_CHIP_ID); | ||
43 | |||
44 | cpu_silicon_rev = (int)(val >> 28); | ||
45 | cpu_partnumber = (int)((val >> 12) & 0xFFFF); | ||
46 | } | ||
47 | |||
48 | /* | ||
49 | * Returns: | ||
50 | * the silicon revision of the cpu | ||
51 | * -EINVAL - not a mx27 | ||
52 | */ | ||
53 | int mx27_revision(void) | ||
54 | { | ||
55 | if (cpu_silicon_rev == -1) | ||
56 | query_silicon_parameter(); | ||
57 | |||
58 | if (cpu_partnumber != 0x8821) | ||
59 | return -EINVAL; | ||
60 | |||
61 | return cpu_silicon_rev; | ||
62 | } | ||
63 | EXPORT_SYMBOL(mx27_revision); | ||