Thread (3 messages) 3 messages, 3 authors, 2014-10-20

Re: [POWERPC] 4xx: EP405 boards support for arch/powerpc

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From: Wolfgang Denk <hidden>
Date: 2014-10-20 19:11:33

Dear Ben,

In message <1413802359.18300.7.camel@pasglop> you wrote:
Ah, I even forgot I wrote that ... I'll have to dig out the docs of
that chip, maybe later this week. Thanks !
...
quoted
   565          cbdv = ((pllmr & 0x00060000) >> 17) + 1; /* CPU:PLB */
   566          opdv = ((pllmr & 0x00018000) >> 15) + 1; /* PLB:OPB */
   567          ppdv = ((pllmr & 0x00001800) >> 13) + 1; /* PLB:PCI */
                         ^^^^^^^^^^^^^^^^^^^^^^^^^
This mask and shift means that ppdv is always 1.
See 7.7.1 PLL Mode Register (CPC0_PLLMR) page 7.10f:

Bits 17:18 PPDV PCI­PLB Frequency Divisor

So that should be (... & 0x00006000) >> 13 ?

Best regards,

Wolfgang Denk

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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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