[U-Boot] MPC8280 Clock configuration for U-boot

[Scott Wood]

GurumurthyGowdar wrote:
> MPC8260 Clock Configuration
>  - Bus-to-Core Mult 3x, VCO Div 4, 60x Bus Freq  16-50 , Core Freq  50-150
>  - dfbrg 1, corecnf 0x10, busdf 4, cpmdf 1, plldf 0, pllmf 4, pcidf 3
>  - vco_out  500000000, scc_clk  125000000, brg_clk   31250000
>  - cpu_clk  300000000, cpm_clk  250000000, bus_clk  100000000
> 
> CPU:   MPC8260 (HiP7 Rev 14, Mask 1.0 1K49M) at 300 MHz
> Board: MPC8280 Based Remote IO CARD.SLN Technologies Pvt Ltd.
> I2C:   ready
> DRAM:  512 MB
> FLASH: 256.5 MB
> *** Warning - bad CRC, using default environment
> 
> In:    serial
> Out:   serial
> Err:   serial
> Net:   FCC2 ETHERNET
> RIO->            
> 
> in terms of hardware i have configured as per the clock configuration but if we see the 
> above message i have a doubt  regarding the 60x Bus Freq 16-50 --> but i have set 100 
> MHZ, Core Freq 50-150 , i have set for 300 MHZ by checking the MPC8280EC i have 
> configured the clock settings.

It looks like the strings such as 16-50, 50-150, etc. are redundant (the 
computed value using clkin is also shown), unhelpful (it's not obvious 
that it's supposed to be a range -- and what is the range really 
supposed to tell you?), and just wrong (it assumes certain possible clkins).

Look at cpu_clk and bus_clk instead, which have the values you're expecting.

> if anyone ported U-boot 1.3.1 on MPC8280 send me the u-boot messages when booted or 
> power on.

Why use such old code?

-Scott