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Change main clock on CMC-PU2 board from 207 MHz to 179 MHz

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because of a bug in the AT91RM9200 CPU PLL
Patch by Martin Krause, 22 Apr 2005
This commit is contained in:
Wolfgang Denk 2005-08-19 00:36:45 +02:00
parent 601aed1e8f
commit df3c7c8f52
2 changed files with 6 additions and 2 deletions
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4
CHANGELOG
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@ -2,6 +2,10 @@
Changes for U-Boot 1.1.4:
======================================================================
* Change main clock on CMC-PU2 board from 207 MHz to 179 MHz
because of a bug in the AT91RM9200 CPU PLL
Patch by Martin Krause, 22 Apr 2005
* Add automatic HW detection for another CMC_PU2 variant
Patch by Martin Krause, 20 Apr 2005

4
include/configs/cmc_pu2.h
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@ -26,7 +26,7 @@
#define __CONFIG_H
/* ARM asynchronous clock */
#define AT91C_MAIN_CLOCK 207360000 /* from 18.432 MHz crystal (18432000 / 4 * 45) */
#define AT91C_MAIN_CLOCK 179712000 /* from 18.432 MHz crystal (18432000 / 4 * 39) */
#define AT91C_MASTER_CLOCK (AT91C_MAIN_CLOCK/3) /* peripheral clock */
#define AT91_SLOW_CLOCK 32768 /* slow clock */
@ -53,7 +53,7 @@
#define SMC2_CSR_VAL 0x100032ad /* 16bit, 2 TDF, 4 WS */
/* clocks */
#define PLLAR_VAL 0x202CBE04 /* 207.360 MHz for PCK */
#define PLLAR_VAL 0x2026BE04 /* 179,712 MHz for PCK */
#define PLLBR_VAL 0x10483E0E /* 48.054857 MHz (divider by 2 for USB) */
#define MCKR_VAL 0x00000202 /* PCK/3 = MCK Master Clock = 69.120MHz from PLLA */