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ARM: mx25: Print the silicon revison

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Print the silicon revison during boot.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
This commit is contained in:
Fabio Estevam 2011-09-02 05:38:54 +00:00 committed by Albert ARIBAUD
parent 0a0522cbff
commit 986d0d1bc5
2 changed files with 32 additions and 1 deletions
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30
arch/arm/cpu/arm926ejs/mx25/generic.c
View File

@ -105,12 +105,40 @@ ulong imx_get_perclk (int clk)
return lldiv (fref, div);
}
u32 get_cpu_rev(void)
{
u32 srev;
u32 system_rev = 0x25000;
/* read SREV register from IIM module */
struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
srev = readl(&iim->iim_srev);
switch (srev) {
case 0x00:
system_rev |= CHIP_REV_1_0;
break;
case 0x01:
system_rev |= CHIP_REV_1_1;
break;
default:
system_rev |= 0x8000;
break;
}
return system_rev;
}
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo (void)
{
char buf[32];
u32 cpurev = get_cpu_rev();
printf ("CPU: Freescale i.MX25 at %s MHz\n\n",
printf("CPU: Freescale i.MX25 rev%d.%d%s at %s MHz\n\n",
(cpurev & 0xF0) >> 4, (cpurev & 0x0F),
((cpurev & 0x8000) ? " unknown" : ""),
strmhz (buf, imx_get_armclk ()));
return 0;
}

3
arch/arm/include/asm/arch-mx25/imx-regs.h
View File

@ -351,4 +351,7 @@ struct aips_regs {
#define GPIO3_BASE_ADDR IMX_GPIO3_BASE
#define GPIO4_BASE_ADDR IMX_GPIO4_BASE
#define CHIP_REV_1_0 0x10
#define CHIP_REV_1_1 0x11
#endif /* _IMX_REGS_H */