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ARM: mx51: Print silicon revision on boot 

Having the silicon revision to appear on the boot log is a useful information.

MX31 and MX35 already show the silicon revision on boot.

Add support for displaying such information for MX51 as well.

Tested on a MX51EVK, where it shows:

CPU identified as i.MX51, silicon rev 3.0

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Fabio Estevam 2011-03-17 23:32:11 -03:00 committed by Sascha Hauer
parent 6447f55da9
commit 76422dbf3c
4 changed files with 36 additions and 0 deletions
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1
arch/arm/mach-mx5/clock-mx51-mx53.c
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@ -1511,6 +1511,7 @@ int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
clk_enable(&iim_clk);
mx51_revision();
clk_disable(&iim_clk);
mx51_display_revision();
/* move usb_phy_clk to 24MHz */
clk_set_parent(&usb_phy1_clk, &osc_clk);

20
arch/arm/mach-mx5/cpu.c
View File

@ -51,6 +51,26 @@ int mx51_revision(void)
}
EXPORT_SYMBOL(mx51_revision);
void mx51_display_revision(void)
{
int rev;
char *srev;
rev = mx51_revision();
switch (rev) {
case IMX_CHIP_REVISION_2_0:
srev = IMX_CHIP_REVISION_2_0_STRING;
break;
case IMX_CHIP_REVISION_3_0:
srev = IMX_CHIP_REVISION_3_0_STRING;
break;
default:
srev = IMX_CHIP_REVISION_UNKNOWN_STRING;
}
printk(KERN_INFO "CPU identified as i.MX51, silicon rev %s\n", srev);
}
EXPORT_SYMBOL(mx51_display_revision);
#ifdef CONFIG_NEON
/*

1
arch/arm/plat-mxc/include/mach/mx51.h
View File

@ -347,6 +347,7 @@
#if !defined(__ASSEMBLY__) && !defined(__MXC_BOOT_UNCOMPRESS)
extern int mx51_revision(void);
extern void mx51_display_revision(void);
#endif
/* tape-out 1 defines */

14
arch/arm/plat-mxc/include/mach/mxc.h
View File

@ -51,6 +51,20 @@
#define IMX_CHIP_REVISION_3_3 0x33
#define IMX_CHIP_REVISION_UNKNOWN 0xff
#define IMX_CHIP_REVISION_1_0_STRING "1.0"
#define IMX_CHIP_REVISION_1_1_STRING "1.1"
#define IMX_CHIP_REVISION_1_2_STRING "1.2"
#define IMX_CHIP_REVISION_1_3_STRING "1.3"
#define IMX_CHIP_REVISION_2_0_STRING "2.0"
#define IMX_CHIP_REVISION_2_1_STRING "2.1"
#define IMX_CHIP_REVISION_2_2_STRING "2.2"
#define IMX_CHIP_REVISION_2_3_STRING "2.3"
#define IMX_CHIP_REVISION_3_0_STRING "3.0"
#define IMX_CHIP_REVISION_3_1_STRING "3.1"
#define IMX_CHIP_REVISION_3_2_STRING "3.2"
#define IMX_CHIP_REVISION_3_3_STRING "3.3"
#define IMX_CHIP_REVISION_UNKNOWN_STRING "unknown"
#ifndef __ASSEMBLY__
extern unsigned int __mxc_cpu_type;
#endif