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ARM: mx53: Print silicon revision on boot

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

MX31, MX35 and MX51 already show the silicon revision on boot.

Add support for displaying such information for MX53 as well.

Tested on a mx53loco board, where it shows:

CPU identified as i.MX53, silicon rev 2.0

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
LAKML-Reference: 1301068367-18937-1-git-send-email-fabio.estevam@freescale.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Fabio Estevam 2011-03-25 12:52:47 -03:00 committed by Sascha Hauer
parent 0575b4b83e
commit 2d95378b04
4 changed files with 25 additions and 13 deletions
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1
arch/arm/mach-mx5/clock-mx51-mx53.c
View file

@ -1563,6 +1563,7 @@ int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
clk_enable(&iim_clk);
mx53_revision();
clk_disable(&iim_clk);
mx53_display_revision();
/* Set SDHC parents to be PLL2 */
clk_set_parent(&esdhc1_clk, &pll2_sw_clk);

23
arch/arm/mach-mx5/cpu.c
View file

@ -166,6 +166,29 @@ int mx50_revision(void)
}
EXPORT_SYMBOL(mx50_revision);
void mx53_display_revision(void)
{
int rev;
char *srev;
rev = mx53_revision();
switch (rev) {
case IMX_CHIP_REVISION_1_0:
srev = IMX_CHIP_REVISION_1_0_STRING;
break;
case IMX_CHIP_REVISION_2_0:
srev = IMX_CHIP_REVISION_2_0_STRING;
break;
case IMX_CHIP_REVISION_2_1:
srev = IMX_CHIP_REVISION_2_1_STRING;
break;
default:
srev = IMX_CHIP_REVISION_UNKNOWN_STRING;
}
printk(KERN_INFO "CPU identified as i.MX53, silicon rev %s\n", srev);
}
EXPORT_SYMBOL(mx53_display_revision);
static int __init post_cpu_init(void)
{
unsigned int reg;

1
arch/arm/plat-mxc/include/mach/common.h
View file

@ -68,4 +68,5 @@ extern void mxc91231_arch_reset(int, const char *);
extern void mxc91231_prepare_idle(void);
extern void mx51_efikamx_reset(void);
extern int mx53_revision(void);
extern int mx53_display_revision(void);
#endif

13
arch/arm/plat-mxc/include/mach/mx53.h
View file

@ -337,17 +337,4 @@
#define MX53_INT_GPIO7_LOW 107
#define MX53_INT_GPIO7_HIGH 108
/* silicon revisions specific to i.MX53 */
#define MX53_CHIP_REV_1_0 0x10
#define MX53_CHIP_REV_1_1 0x11
#define MX53_CHIP_REV_1_2 0x12
#define MX53_CHIP_REV_1_3 0x13
#define MX53_CHIP_REV_2_0 0x20
#define MX53_CHIP_REV_2_1 0x21
#define MX53_CHIP_REV_2_2 0x22
#define MX53_CHIP_REV_2_3 0x23
#define MX53_CHIP_REV_3_0 0x30
#define MX53_CHIP_REV_3_1 0x31
#define MX53_CHIP_REV_3_2 0x32
#endif /* ifndef __MACH_MX53_H__ */