[U-Boot] [PATCH 1/2] ARM: mx25: Print the silicon revison

[Stefano Babic]

On 08/30/2011 03:54 PM, Fabio Estevam wrote:
> Print the silicon revison during boot.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
> ---

Hi Fabio,

>  
> +
> +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 |= CHIP_REV_UNKNOWN;
> +		break;
> +	}
> +
> +	return system_rev;
> +}
> +
>  #if defined(CONFIG_DISPLAY_CPUINFO)
>  int print_cpuinfo (void)
>  {
>  	char buf[32];
> +	u32 cpurev;
> +
> +	cpurev = get_cpu_rev();
>  
> -	printf ("CPU:   Freescale i.MX25 at %s MHz\n\n",
> +	printf("CPU:   Freescale i.MX25 rev%d.%d at %s MHz\n\n",
> +		(cpurev & 0x000F0) >> 4,
> +		(cpurev & 0x0000F) >> 0,

I see that we did different for other i.MX processor - if you check in
the MX31 processor, we print the "unknown" string if the revision number
does not match a known value instead of printing an arbitrary value as
here. Can we stick with the same behavior ?

Best regards,
Stefano Babic

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